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Hypotelus brevitarsus Bortoluzzi & Caron, sp. nov.
No full textHypotelus brevitarsus Bortoluzzi & Caron sp. nov. (Figs. 15, 39, 58, 69, 70, 80, 98, 99, 114) Type material. Holotype deposited in FMNH, male (photo, Fig. 15), with labels: (1) “ PANAMA: Chiriqui Prov. “ Barca ” area, Finca / Lerida nr. Boquete./III:12:1959 5650 ft.” [white label, printed in black; day and elevation handwritten]; (2) “under slab on/pile of cut chips/and bark” [white label, printed in black]; (3) “leg./ H. S. Dybas ” [white label, printed in black]; (4) “ HOLOTYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [red label, printed in black]. Paratypes: 11 specimens, deposited in FMNH. 1 male, dissected, whole specimen fixed on acetate plastic card covered with Canada balsam, with the same three first labels of holotype: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 1female, dissected, terminalia fixed on acetate plastic card covered with Canada balsam, with same three first labels of holotype: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 1 female, dissected, terminalia fixed on acetate plastic card covered with Canada balsam, with same three first labels of holotype, except for the date: “III:14:1959.”: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 7 specimens, sex undetermined, with same three first labels of holotype: (4) “PARATYPE/ Hypotelus brevitarsus /Bortoluzzi & Caron” [yellow label, printed in black]; one specimen of them with additional label: (4) “ Hypotelus /det. Newton 1994” [white label, first line, handwritten; second line, printed in black]; (5) “PARATYPE/ Hypotelus brevitarsus / Bortoluzzi & Caron” [yellow label, printed in black]. 1 specimen, sex undetermined, with same three first labels of holotype, except for the date: “III:14:1959.”: (4) “PARATYPE/ Hypotelus brevitarsus /Bortoluzzi & Caron” [yellow label, printed in black]. Additional material. See Appendix 2. Diagnosis. Hypotelus brevitarsus sp. nov. is similar to H. pusillus and differs by the antennal scape of male without prominent tooth on inner face; the antennae shorter, not reaching half-length of elytra; and tergite 10 with lateral sides at posterior margin emarginated in both sexes (Figs. 58, 98), besides the genital structures (see below). H. brevitarsus sp. nov. may be distinguished from other species of Hypotelus by the metatarsomeres 5 somewhat shorter and transverse (Fig. 39), although in some specimens this is not so prominent. Description. BL: 2.2–2.9 mm, BW: 0.6–0.8 mm. Body slightly convex; dorsal surface glossy; brown (elytra yellow); appendages lighter, except mandibles. Dorsal integument of head and pronotum with dispersed fine punctures and undulate microstriae only on margins; elytra with dispersed fine punctures and only one longitudinal finely punctate stria close to elytral suture. Male. Head. Supra-antennal area slightly prominent. Antennae reaching humeral angle; antennomeres 5, 7, 9 and 11 with longest setae on inner face; antennomeres 2 and 3 of equal length, 5–11 gradually increasing in length toward antennal apex. Mandibles symmetrical. Mentum 1.6 times as wide as long. Thorax. Pronotum wider than long (PW/PL=1.3); anterior angles rounded and slightly prominent; apical half with somewhat parallel sides and basal half gradually narrowing toward the base; with complete internal midlongitudinal ridge and slight longitudinal median sulcus only on basal half. Elytra somewhat longer than wide (EL/ BW=1.1), covering partially or not abdominal tergite 3. Metatarsomeres 5 somewhat shorter and transverse (Fig. 39). Abdomen. Tergite 8 with posterior margin rounded; sternite 8 with posterior margin rounded; tergite 9 with short ventral struts; sternite 9 with posterior margin truncate and with two pairs of long setae; tergite 10 with posterior and lateral margins weakly pigmented, with short fringes and four setae on each side (Fig. 58). Median lobe of aedeagus with bulbous base in ventral view and curved shape in lateral view (Figs. 69–70). Female. Similar to male except for: without very long setae on antennomeres 5, 7, 9 and 11; abdominal sternite 8 with posterior margin somewhat truncate and posterio-laterally slightly emarginated, with short setae (Fig. 80); tergite 9 without ventral struts; bursa copulatrix as H. pusillus; ovipositor consisting of a pair of weakly pigmented hemisternites and a pair of more apical coxites, and with many long setae on apex; spermatheca as Fig. 99. Geographical records. Panama (Chiriqui) (Fig. 114). Biological notes. This species was collected at elevations between 4750 ft (1447 m) and 6900 ft (2013 m), under a slab on a pile of cut chips and bark, in a split sapling, in scraping, in torn fibers of a wounded tree and under bark of a log on the ground. Remarks. Some specimens may have the metatarsomeres a little less transverse. The longest setae on inner face of antennomeres 5, 7, 9 and 11 are sometimes not so visible. In the material examined, there are five specimens collected from 4750ft (1447 m), which do not have the metatarsomeres 5 shorter and transverse, and we are unable to segregate these 5 specimens into more than one species. The feature metatarsomere 5 shorter and transverse is only visible on the specimens collected above 5000ft (1524 m). Etymology. The specific name refers to the shape of the metatarsus and is a compound name: Latin adjective brev - (short), the connective vowel i, and the Greek noun latinized to tarsus (foot). It is a noun in apposition.Published as part of Bortoluzzi, Sidnei, Caron, Edilson & Ribeiro-Costa, Cibele S., 2017, Revision and phylogeny of Hypotelus Erichson: a Neotropical genus of minute rove beetles (Coleoptera, Staphylinidae, Piestinae), pp. 451-487 in Zootaxa 4273 (4) on pages 462-463, DOI: 10.11646/zootaxa.4273.4.1, http://zenodo.org/record/80364
Hypotelus brevitarsus Bortoluzzi & Caron, sp. nov.
No full text<i>Hypotelus brevitarsus</i> Bortoluzzi & Caron sp. nov. <p>(Figs. 15, 39, 58, 69, 70, 80, 98, 99, 114)</p> <p> <b>Type material.</b> Holotype deposited in FMNH, male (photo, Fig. 15), with labels: (1) “ PANAMA: Chiriqui Prov. “ Barca ” area, Finca / Lerida nr. Boquete./III:12:1959 5650 ft.” [white label, printed in black; day and elevation handwritten]; (2) “under slab on/pile of cut chips/and bark” [white label, printed in black]; (3) “leg./ H. S. Dybas ” [white label, printed in black]; (4) “ HOLOTYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [red label, printed in black].</p> <p>Paratypes: 11 specimens, deposited in FMNH. 1 male, dissected, whole specimen fixed on acetate plastic card covered with Canada balsam, with the same three first labels of holotype: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 1female, dissected, terminalia fixed on acetate plastic card covered with Canada balsam, with same three first labels of holotype: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 1 female, dissected, terminalia fixed on acetate plastic card covered with Canada balsam, with same three first labels of holotype, except for the date: “III:14:1959.”: (4) “ PARATYPE / Hypotelus brevitarsus / Bortoluzzi & Caron ” [yellow label, printed in black]. 7 specimens, sex undetermined, with same three first labels of holotype: (4) “PARATYPE/ Hypotelus brevitarsus /Bortoluzzi & Caron” [yellow label, printed in black]; one specimen of them with additional label: (4) “ Hypotelus /det. Newton 1994” [white label, first line, handwritten; second line, printed in black]; (5) “PARATYPE/ Hypotelus brevitarsus / Bortoluzzi & Caron” [yellow label, printed in black]. 1 specimen, sex undetermined, with same three first labels of holotype, except for the date: “III:14:1959.”: (4) “PARATYPE/ Hypotelus brevitarsus /Bortoluzzi & Caron” [yellow label, printed in black].</p> <p> <b>Additional material.</b> See Appendix 2.</p> <p> <b>Diagnosis.</b> <i>Hypotelus brevitarsus</i> <b>sp. nov.</b> is similar to <i>H. pusillus</i> and differs by the antennal scape of male without prominent tooth on inner face; the antennae shorter, not reaching half-length of elytra; and tergite 10 with lateral sides at posterior margin emarginated in both sexes (Figs. 58, 98), besides the genital structures (see below). <i>H. brevitarsus</i> <b>sp. nov.</b> may be distinguished from other species of <i>Hypotelus</i> by the metatarsomeres 5 somewhat shorter and transverse (Fig. 39), although in some specimens this is not so prominent.</p> <p> <b>Description.</b> BL: 2.2–2.9 mm, BW: 0.6–0.8 mm. Body slightly convex; dorsal surface glossy; brown (elytra yellow); appendages lighter, except mandibles. Dorsal integument of head and pronotum with dispersed fine punctures and undulate microstriae only on margins; elytra with dispersed fine punctures and only one longitudinal finely punctate stria close to elytral suture.</p> <p> <i>Male. Head</i>. Supra-antennal area slightly prominent. Antennae reaching humeral angle; antennomeres 5, 7, 9 and 11 with longest setae on inner face; antennomeres 2 and 3 of equal length, 5–11 gradually increasing in length toward antennal apex. Mandibles symmetrical. Mentum 1.6 times as wide as long.</p> <p> <i>Thorax.</i> Pronotum wider than long (PW/PL=1.3); anterior angles rounded and slightly prominent; apical half with somewhat parallel sides and basal half gradually narrowing toward the base; with complete internal midlongitudinal ridge and slight longitudinal median sulcus only on basal half. Elytra somewhat longer than wide (EL/ BW=1.1), covering partially or not abdominal tergite 3. Metatarsomeres 5 somewhat shorter and transverse (Fig. 39).</p> <p> <i>Abdomen.</i> Tergite 8 with posterior margin rounded; sternite 8 with posterior margin rounded; tergite 9 with short ventral struts; sternite 9 with posterior margin truncate and with two pairs of long setae; tergite 10 with posterior and lateral margins weakly pigmented, with short fringes and four setae on each side (Fig. 58). Median lobe of aedeagus with bulbous base in ventral view and curved shape in lateral view (Figs. 69–70).</p> <p> <i>Female.</i> Similar to male except for: without very long setae on antennomeres 5, 7, 9 and 11; abdominal sternite 8 with posterior margin somewhat truncate and posterio-laterally slightly emarginated, with short setae (Fig. 80); tergite 9 without ventral struts; bursa copulatrix as <i>H. pusillus</i>; ovipositor consisting of a pair of weakly pigmented hemisternites and a pair of more apical coxites, and with many long setae on apex; spermatheca as Fig. 99.</p> <p> <b>Geographical records.</b> Panama (Chiriqui) (Fig. 114).</p> <p> <b>Biological notes.</b> This species was collected at elevations between 4750 ft (1447 m) and 6900 ft (2013 m), under a slab on a pile of cut chips and bark, in a split sapling, in scraping, in torn fibers of a wounded tree and under bark of a log on the ground.</p> <p> <b>Remarks.</b> Some specimens may have the metatarsomeres a little less transverse. The longest setae on inner face of antennomeres 5, 7, 9 and 11 are sometimes not so visible.</p> <p>In the material examined, there are five specimens collected from 4750ft (1447 m), which do not have the metatarsomeres 5 shorter and transverse, and we are unable to segregate these 5 specimens into more than one species. The feature metatarsomere 5 shorter and transverse is only visible on the specimens collected above 5000ft (1524 m).</p> <p> <b>Etymology.</b> The specific name refers to the shape of the metatarsus and is a compound name: Latin adjective <i>brev</i> - (short), the connective vowel <i>i</i>, and the Greek noun latinized to <i>tarsus</i> (foot). It is a noun in apposition.</p>Published as part of <i>Bortoluzzi, Sidnei, Caron, Edilson & Ribeiro-Costa, Cibele S., 2017, Revision and phylogeny of Hypotelus Erichson: a Neotropical genus of minute rove beetles (Coleoptera, Staphylinidae, Piestinae), pp. 451-487 in Zootaxa 4273 (4)</i> on pages 462-463, DOI: 10.11646/zootaxa.4273.4.1, <a href="http://zenodo.org/record/803644">http://zenodo.org/record/803644</a>
Hypotelus castaneus Bortoluzzi & Caron, sp. nov.
No full textHypotelus castaneus Bortoluzzi & Caron sp. nov. (Figs. 14, 20, 21, 28, 32, 46,47, 50, 54, 57, 71, 72, 81, 95, 96, 97, 113) Type material. Holotype deposited in FMNH, male (photo, Fig. 14) [damaged specimen: without left antennomeres 3–11], with labels: (1): “ PERU: Cuzco Dept.,/ Consuelo, Manu rd. / Km 165, 10-X-1982,” [white label, printed in black]; (2) “ FMHD #82-363, ex/bamboo shoots, L. E./Watrous & G. Mazurek ” [white label, printed in black]. (3) “ HOLOTYPE / Hypotelus castaneus / Bortoluzzi & Caron ” [red label, printed in black]. Paratypes: 11 specimens, deposited in FMNH. 4 males with the same two first labels of holotype: (3) “ PARATYPE / Hypotelus castaneus / Bortoluzzi & Caron ” [yellow label, printed in black]; two of them dissected, fixed on acetate plastic card coved with Canada balsam. 7 females with the same two first labels of holotype: (3) “ PARATYPE / Hypotelus castaneus / Bortoluzzi & Caron ” [yellow, printed in black]; two of them dissected, terminalia fixed on acetate plastic card coved with Canada balsam. Additional material. See Appendix 2. Diagnosis. Hypotelus castaneus sp. nov. may be distinguished from other species of Hypotelus by the front with two slightly pointed frontal processes (Figs. 20–21); males may be distinguished by the prominent tooth on antennal scape, antennomeres 5–11 longer than wide and apex of aedeagus wider than other (Fig. 72); the shape of the bursa copulatrix (Fig. 95) distinguishes females. Description. BL: 2.6–3.0 mm, BW: 0.7–0.8 mm. Body slightly convex; dorsal surface glossy; reddish dark brown, appendages lighter (Fig. 14). Dorsal integument of head and pronotum with dispersed fine punctures and undulate microstriae; elytra with dispersed fine punctures and only one longitudinal finely punctate stria close to elytral suture. Male. Head. Supra-antennal area slightly prominent. Front with two slightly pointed frontal processes (Figs. 20–21); Antennae almost reaching apex of elytra; scape with prominent tooth on inner face; antennomere 3 longer than 2; 5–11 longer than wide, with same length. Mandibles symmetrical. Mentum 1.6 times as wide as long. Thorax. Pronotum wider than long (PW/PL=1.3); anterior angles rounded and slightly prominent; apical half with somewhat parallel sides and basal half gradually narrowing toward the base; with complete internal midlongitudinal ridge and slight longitudinal median sulcus only on disc. Elytra somewhat longer than wide (EL/ BW=1.1), covering partially or entirely abdominal tergite 3. Abdomen. Tergite 8 with posterior margin rounded (Fig. 50); sternite 8 with posterior margin narrower and rounded, with short setae except in the middle region (Fig. 54); tergite 9 with short ventral struts; sternite 9 with posterior margin truncate and with two pairs of long setae; tergite 10 at apex with four setae on each side and short fringes (Fig. 57). Median lobe of aedeagus truncate at apex and with one prominent process on median region at posterior margin in ventral view and curved shape in lateral view (Figs. 71–72). Female. Similar to male except for: longer distance between pointed frontal processes (Fig. 21); antennae shorter, with antennomeres 5–10 shorter in length; scape without prominent tooth on inner face; abdominal sternite 8 with short setae and posterior margin emarginate except in the middle region (Fig. 81); tergite 9 without ventral struts; tergite 10 weakly pigmented at apex (Fig. 96); bursa copulatrix forming a narrow duct at basal half and apical half bulbous (Fig. 95); ovipositor consisting of a pair of weakly pigmented hemisternites and a pair of more apical coxites, and has many long setae on apex; spermatheca with globose capsule (Fig. 97). Geographical records. Peru (Cusco), Colombia, Costa Rica (Puntarenas), Panama (Chiriqui) and Venezuela (Aragua) (Fig. 113). Biological notes. The specimens have been found in bamboo shoots, in cloud and rain forests, under a slab on pile of cut chips and bark, in floor litter on a slope above stream-good forest cover. Some specimens were collected by Berlese extraction of leaf litter. Etymology. The specific name refers to the brown color of the entire body and it is a Latin masculine adjective: castaneus (of the color of chestnuts).Published as part of Bortoluzzi, Sidnei, Caron, Edilson & Ribeiro-Costa, Cibele S., 2017, Revision and phylogeny of Hypotelus Erichson: a Neotropical genus of minute rove beetles (Coleoptera, Staphylinidae, Piestinae), pp. 451-487 in Zootaxa 4273 (4) on pages 463-464, DOI: 10.11646/zootaxa.4273.4.1, http://zenodo.org/record/80364
Hypotelus corniculatus Bortoluzzi & Caron, sp. nov.
No full textHypotelus corniculatus Bortoluzzi & Caron sp. nov. (Figs. 16, 22, 100, 101, 102) Type material. Holotype deposited in FMNH, female (photo, Fig. 16, image by Crystal Maier, copyright Field Museum of Natural History, Chicago) [Dissected, body glued on white card; abdominal segments 8 to 10 fixed on acetate plastic card and covered with Canada balsam], with labels: (1) “ Chitaría, Alto Sl / Corrial [?], 9-13.IV.41./ Costa Rica ” [old white label, handwritten]; (2) “Field Mus. Nat. Hist./1966/A, Bierig Colln./Acc. Z-13812” [white label, printed in black]; (3) “ HOLOTYPE / Hypotelus corniculatus / Bortoluzzi & Caron ” [red label, printed in black]. Diagnosis. Hypotelus corniculatus sp. nov. may be distinguished from other species of Hypotelus by the deflected and projected front with two small and pointed frontal processes (Fig. 22), antennomeres 5–11 longer than wide (Fig. 16) and by the shape of the bursa copulatrix (Fig. 100). Description. BL: 4.2 mm, BW: 1.0 mm. Body slightly convex (Fig. 16); dorsal surface matte (except elytra glossy); entirely brown with legs a little lighter. Dorsal integument of head and pronotum with fine punctures and granulate microsculpture; elytra with one longitudinal finely punctate stria close to internal margin; abdomen with fine punctures and granulate microsculpture. Female. Head. Supra-antennal area visibly prominent, deflected front and with pair of small and pointed frontal processes, about half-length of scape (Fig. 23–24). Antennae almost reaching apex of elytra; some long setae on apex of antennomeres 3–11; antennomere 2 slightly shorter than 3; 5–11 longer than wide and gradually increasing in length toward antennal apex. Mandibles symmetrical. Thorax. Pronotum wider than long (PW/PL=1.45); anterior angles rounded and slightly prominent; apical twothirds with somewhat curved sides and basal one-third gradually narrowing toward the base; with complete internal mid-longitudinal ridge and slight longitudinal median sulcus on almost entire length of pronotum; small depression at middle on basal half, near to posterior margin. Elytra somewhat longer than wide (EL/BW=1.2), not covering abdominal tergite 3. Abdomen. Tergite 8 with posterior margin truncate; sternite 8 with posterior margin rounded and with short setae; tergite 10 with posterior margin weakly pigmented, with short fringes and three setae on each side at apex (Fig. 101); bursa copulatrix as Fig. 100; ovipositor consisting of a pair of weakly pigmented hemisternites and a pair of more apical coxites, and with many long setae on apex; spermatheca as Fig. 102. Male. Unknown. Geographical records. Costa Rica. Biological notes. No data. Etymology. The specific name refers to the small “horns” on front of the head and it is a Latin masculine adjective, corniculatus, which means horned.Published as part of Bortoluzzi, Sidnei, Caron, Edilson & Ribeiro-Costa, Cibele S., 2017, Revision and phylogeny of Hypotelus Erichson: a Neotropical genus of minute rove beetles (Coleoptera, Staphylinidae, Piestinae), pp. 451-487 in Zootaxa 4273 (4) on pages 464-471, DOI: 10.11646/zootaxa.4273.4.1, http://zenodo.org/record/80364
Hypotelus scheerpeltzi Bortoluzzi & Caron, sp. nov.
No full textHypotelus scheerpeltzi Bortoluzzi & Caron sp. nov. (Figs. 11, 49, 73, 74, 82, 106, 107, 108, 113) Type material. Holotype deposited in DZUP, male (photo, Fig. 11) [damaged specimen: without right anterior leg, tibia and tarsus of right middle leg and tarsus of right hind leg. Dissected, body glued on white card; abdominal segments 8 to 10 and aedeagus fixed on acetate plastic card and covered with Canada balsam], with labels: (1) “ Peru / Lamas ” [old white label, printed in black]; (2) “ Coleção / M. Alvarenga ” [old white label, printed in black]; (3) “ ♂ ” [old white label, printed in black]; (4) “COTYPUS/ Hypotelus / Weyrauchi / O. Scheerpeltz ” [pink label, first and last lines printed in black, except the letter O; other lines, handwritten]; (5) “ HOLOTYPE / Hypotelus scheerpeltzi / Bortoluzzi & Caron ” [red label, printed in black]. Paratype: 1 female, deposited in DZUP [dissected, abdominal segments 8 to 10 and spermatheca fixed on acetate plastic card and covered with Canada balsam], with the same labels of holotype, except: (3) “ ♀ ” [old white label, printed in black]; (4) “ PARATYPE / Hypotelus scheerpeltzi / Bortoluzzi & Caron ” [yellow label, printed in black]. Diagnosis. Hypotelus scheerpeltzi sp. nov. may be distinguished from other species of Hypotelus by the color pattern of the elytra (Fig. 11); males are distinguished by median lobe of aedeagus thinner in lateral view and apex as a hook (Fig. 73); females are distinguished by the shape of tergite 10 and bursa copulatrix (Figs. 106–108). Description. BL: 3.0– 3.3 mm, BW: 0.8 mm. Body slightly convex; dorsal surface glossy; dark brown, except elytra yellowish (with two transverse darker areas, basal and apical) (Fig. 11); appendages lighter, except mandibles and antennomeres 4–11. Dorsal integument of head and pronotum with dispersed fine punctures and undulate microstriae absent on basal disc of head and on disc of pronotum; elytra with dispersed fine punctures and only one longitudinal finely punctate stria close to elytral suture. Male. Head. Supra-antennal area slightly prominent. Antennae inserted ventrally and passing humeral angle; antennomeres 2 and 3 of equal length; 5–11 gradually increasing in length toward antennal apex. Mandibles symmetrical. Thorax. Pronotum wider than long (PW/PL=1.5); anterior angles rounded and slightly prominent; apical half with somewhat parallel sides and basal half gradually narrowing toward the base; with complete internal midlongitudinal ridge and slight longitudinal median sulcus only on basal two-third. Elytra somewhat longer than wide (EL/BW=1.2), can partially cover abdominal tergite 3. Abdomen. Tergite 8 with posterior margin truncate (Fig. 49); sternite 8 at posterior margin with a small weakly pigmented strip and short setae; tergite 9 with short ventral struts; sternite 9 with posterior margin truncate and with two pairs of long setae; tergite 10 with posterior margin weakly pigmented, short fringes and four setae on each side. Median lobe of aedeagus with slightly bulbous base and apex somewhat pointed in ventral view; curved shape and thin in lateral view, with apex curved as a hook (Figs. 73–74). Female. Similar to male except for: abdominal sternite 8 with posterior margin sinuous (Fig. 82); tergite 10 truncate at apex (Fig. 107); bursa copulatrix forming like a narrow ring (Fig. 106); ovipositor consisting of a pair of weakly pigmented hemisternites and a pair of more apical coxites, and with many long setae on apex; spermatheca as Fig. 108. Geographical records. Peru (San Martín) (Fig. 113). Biological notes. No data. Etymology. The specific name refers to Otto Scheerpeltz, the researcher who first recognized it is as a new species but did not describe it. Remarks. The type material bears a label handwritten by Otto Scheerpeltz, with the name “ Weyrauchi ” on it. A description for Hypotelus weyrauchi has never been published and is therefore treated as a manuscript name of O. Scheerpeltz. It is probable that there are other specimens labeled alike.Published as part of Bortoluzzi, Sidnei, Caron, Edilson & Ribeiro-Costa, Cibele S., 2017, Revision and phylogeny of Hypotelus Erichson: a Neotropical genus of minute rove beetles (Coleoptera, Staphylinidae, Piestinae), pp. 451-487 in Zootaxa 4273 (4) on pages 477-478, DOI: 10.11646/zootaxa.4273.4.1, http://zenodo.org/record/80364
Bledius hyalinus Bortoluzzi & Caron 2019, new species
No full textBledius hyalinus Bortoluzzi & Caron, new species (Figs. 1–12) Type Material: Holotype, deposited in DZUP: dissected, male (Fig. 1, 2), with labels: 1) “ BRASIL: Paraná, Pontal / do Paraná, Atami, / 05.iv.2017, E. Caron (col.)”; 2) “ HOLOTYPE / Bledius hyalinus / Bortoluzzi & Caron”. Paratypes, deposited in DZUP: 2 females, with the same locality label of the holotype. Additional material: 2 specimens, deposited in DZUP, from the same type locality but collected in VII. 2017; sex undetermined. Diagnosis: Bledius hyalinus sp. nov., B. actitus and B. playanus have short wings, but B. hyalinus sp. nov. can be distinguished from those species by dark brown body color and translucent elytra; and is lacking projected horn in the supraantennal ridge. B. actitus is brownish black to reddish brown with elytra dark reddish brown in threefifths of its length, while B. playanus is dark reddish brown with elytra pale brownish yellow, both with supraantennal ridge. Description: Body length: 1.8 mm. Body convex; dorsal surface glossy. Body color dark brown; appendages and meso-metathorax dorsally yellowish. Elytra translucent. Head: Supraantennal areas well-developed as shelf-like elevation, not anteriorly directed horn (Fig. 3). Frontoclypeal suture present, with anterior margin truncate (Fig. 3); dorsal surface with two long setae. Eyes prominent; ommatidia facets round and strongly convex (Fig. 3, 5). Antennae, scape longest; antennomere 2 long, about the length of antennomeres 3–5 combined; gradually enlarged toward apex. Labrum with anterior margin sinuous (Fig. 5), without median incision. Epipharynx well-developed (Fig. 5), with on long seta. Mandibles long and bidentate (Fig. 5). Maxillary palpus 4-segmented; segment 3 longest and thickest (Fig. 6). Galea with a few fanlike rows of setae on apex (Fig. 6). Lacinia with few and reduced setae. Labium with long and thin median sclerite (Fig 6); labial palps with second segment shortest; first segment thickest. Mentum large, transverse and trapezoidal (Fig. 6). Gular sutures fused (Fig. 6). Thorax: Pronotum as long as wide (Fig. 1); shape somewhat pentagonal, gradually narrowing toward the base; with complete internal mid-longitudinal ridge and conspicuous longitudinal median sulcus. Procoxae large and contiguous; protrochantin exposed; procoxal fissure open. Elytra short (Fig. 1); posterior margin truncate, emarginate at elytral suture. Meso and metathoracic underdeveloped (Fig. 1). Shortwinged (Fig. 1). Mesocoxae broad and contiguous. Mesosternum long and thin, reaching at least half-length of mesocoxae. Metasternum not prominent. Tarsal formula 3–3–3. Abdomen: not parallel-sided, widening posterad to abdominal segments V–VII (Fig. 7–9). Abdominal segments III to VII each with two pairs of paratergites. Abdominal terga II–VII with subbasal transversal carina. Tergum VIII with posterior margin truncate (Fig. 7); sternum VIII with posterior margin projected at the middle (Fig. 8, 9); tergum IX with glandular canal closed dorsally and broadly separated by tergum X (Fig. 10); tergum X shape trapezoidal (Fig. 10). Male: Aedeagus (Fig. 12) without parameres. Median lobe tubular, larger basally than apically and sclerotized on dorsal and ventral surfaces. Female: Spermatheca bipartite (Fig. 11); receptacle pot-shaped and heavily sclerotized; spermathecal gland sclerotized, irregularly spherical. Geographical records: Brazil (Paraná). Etymology: the specific name “ hyalinus ” is a Latin adjective derivate from Greek (hyalos) that means “of glass or transparent”, an allusion to hyaline elytra, which is possible to see the dorsal plates of pterothorax. Taxonomical notes: in the forcipatus species group only B. actitus and B. playanus have short wings, and they are known only from the USA. Bledius hyalinus differs from the United States species by the absence of anteriorly directed horn in the supraantennal ridge. According to the key of United States species of Microbledius (= forcipatus group) of Herman (1972), the most diagnostic features that separete the species are the shape of a horn, eyes size, intraocular width and body color. Thus, we recognized the species as new considering these features, the geographical distribution. The species, which occur in southern South America are: Bledius albidus. B. albipennis, B. miles, B. minutissimus and B. weiseri, all distributed in Argentina [see fig. 389 in Herman 1986], but none of them were recorded in coastal areas. The unique species recorded from Brazil is B. albidus, which occurs in northern region of Brazil (Amazonas). Biological Notes: B. hyalinus was collected in March and July of 2017 during field work at the Atlantic beach "Atami", Pontal do Paraná city, state of Paraná; in the ranges 25°36'07.73"S 48°23'20.20"W to 25°35'46.84"S 48°22'43.81"W. It was found in association of Bledius fernandezi (52 adults and 47 larvae), B. bonariensis (1 adult) and Efflagitatus freudei Pacheco, 1973 (Heteroceridae) (6 adults and 12 larvae). In the field, many specimens of B. fernandezi occurrred in dry sand near shrubby area, while E. freudei occurred in wet sand near streams. However, we do not know if B. hyalinus occurr in dry or wet sand. Remarks: Bledius species of forcipatus group are restricted to New World with distribution range from central and western parts of North America south to central Argentina. According to Herman (1986), the species of the group are found in freshwater and saline habits, and may be found in most of the coastal and arid parts of Central and South America. However, with respect to the distribution map of forcipatus group in Central and South America (Fig. 389, p. 211), there are no records of occurrence of the members of the forcipatus group on Brazilian coast. Most of the records in South America are from inland areas. Thus, the distributional record for Bledius hyalinus represents the first occurrence of the forcipatus group on the coast of Brazil.Published as part of Bortoluzzi, Sidnei & Caron, Edilson, 2019, Bledius hyalinus sp. nov. (Coleoptera: Staphylinidae: Oxytelinae), of the forcipatus group, first recorded from coastal Brazil, pp. 391-395 in Zootaxa 4559 (2) on pages 392-395, DOI: 10.11646/zootaxa.4559.2.12, http://zenodo.org/record/262694
Biosuperfici per lo studio del fattore di forma e dell'orientamento spaziale di biomolecole tramite Microscopia a Forza Atomica
No full textMolte funzioni cruciali per la vita cellulare sono strettamente connesse alla struttura delle biomolecole coinvolte. Ciò spiega l’accresciuto interesse in questi ultimi anni per la comprensione della correlazione tra struttura e funzione di una biomolecola. In queste indagini sono coinvolte differenti metodiche analitiche, che spaziano dalla cristallografia a raggi X all’NMR, alle tecniche di microscopia elettronica SEM e TEM. In molti casi, però, per comprendere alcune proprietà ed alcuni aspetti della funzione di una biomolecola può essere sufficiente conoscerne il fattore di forma e le dimensioni, e non necessariamente la sua struttura atomica dettagliata. La Microscopia a Forza Atomica (AFM) consente di ottenere immagini tridimensionali di biomolecole in ambiente fisiologico, coniugando rapidità d’indagine a semplicità di preparazione del campione. Tale metodica consente di ottenere “bioimmagini”, cioè visualizzazioni dirette della forma, delle dimensioni, della disposizione e dell’orientamento spaziale di molecole d’interesse biologico. Questa prerogativa non è esclusiva dell’AFM, ma questa è l’unica microscopia che permette di operare senza modifiche irreversibili del campione, in ambiente fisiologico, in tempi brevi e con estrema sensibilità. Buone immagini AFM possono essere ottenute solo se la biomolecola è opportunamente ancorata ad una superficie piana. L’immobilizzazione di biomolecole su superfici è un’area di ricerca molto attiva: le strategie perseguite prevedono in genere l’introduzione di gruppi reattivi sulla superficie stessa in grado di formare legami covalenti con la biomolecola. Infatti, l’adsorbimento fisico delle biomolecole alla superficie, pur se facilmente realizzabile, non è un processo controllabile e porta facilmente alla denaturazione delle biomolecole stesse per interazione col supporto; ad esso quindi si preferisce un legame specifico biomolecola–superficie, che sia stabile nel tempo, che garantisca il mantenimento della conformazione molecolare e che sia controllabile modulando le condizioni di reazione. L’ottenimento di adeguate “biosuperfici”, cioè di supporti estremamente piatti e chimicamente suscettibili all’interazione con specifiche biomolecole, costituisce un problema biotecnologico che si configura come il prerequisito fondamentale per lo studio mediante AFM delle caratteristiche strutturali e morfologiche delle molecole biologiche stesse.
A tal fine è stato depositato un film sottile d’oro, mediante la tecnica di gold sputtering, su supporti di vetro silanizzato. Lo spessore dello strato metallico depositato in funzione del tempo di sputtering è stato verificato tramite AFM, mentre la stabilità dello strato d’oro nelle condizioni sperimentali normalmente impiegate per l’immobilizzazione di biomolecole è stata confermata tramite indagini con microscopia ottica. Su questi supporti sono stati quindi costruiti dei self assembling monolayers (SAMs) di tioli organici, contenenti gruppi S-H o S-S, su cui immobilizzare in modo controllato e specifico delle biomolecole. La versatilità di tali SAMs come biosuperfici è da ricondurre alla possibilità di creare monostrati autoassemblanti misti, cioè a due o più componenti, in cui almeno uno dei componenti contenga un gruppo funzionale utilizzabile per promuovere interazioni specifiche con biomolecole presenti in soluzione. Come componente caratterizzante della biosuperficie è stata utilizzata la biotina, una piccola molecola organica del peso pari a 244 Dalton che, inserita tramite legame covalente in una molecola biologicamente attiva, non ne altera l’attività biologica. Sono stati preparati SAMs misti di acido 3-mercapto-proprionico e di una biotina modificata contenente un gruppo S-S, a diversi rapporti di concentrazione relativa per ottenere una biosuperficie con un numero controllato di molecole di biotina, cioè di siti di ancoraggio specifici per l’immobilizzazione successiva della Streptavidina. Successivamente si è verificata la formazione del complesso biotina–streptavidina, complesso comunemente utilizzato in biochimica ed in molti ambiti immunodiagnostici per la sua elevata specificità e stabilità in diverse condizioni sperimentali. Utilizzando soluzioni a concentrazione variabile di streptavidina è stato dimostrato come il numero di molecole di proteina fissate alla biosuperficie dipenda direttamente dal numero di molecole di biotina inserite nel SAM misto.
Il supporto così ottenuto, costituito da superfici silanizzate e dorate ed attivate mediante l’impiego di SAMs a reattività “controllata”, può essere proficuamente impiegato per l’immobilizzazione di biomolecole che possono essere visualizzate tramite la Microscopia a Forza Atomica a livello di singola molecola
Hypotelus melanodelta Bortoluzzi & Caron, sp. nov.
No full text<i>Hypotelus melanodelta</i> Bortoluzzi & Caron sp. nov. <p>(Figs. 13, 79, 91)</p> <p> <b>Type material.</b> Holotype deposited in FMNH, female (photo, Fig. 13) [damaged specimen: without right antennomeres 3–11. Dissected, body glued on white card; abdominal segments 8 to 10 and spermatheca fixed on acetate plastic card and covered with Canada balsam], with labels: (1) “ Columbia occ./ Cali, Fassl ” [old white label, printed in black]; (2) “ Chicago NHMus/ M.Bernhauer / Collection ” [old white label, printed in black]; (3) “ micans Shp.?[?]/var/det. Bernh. ” [old white label, handwritten, last line printed in black]; (4) “ HOLOTYPE / Hypotelus melanodelta / Bortoluzzi & Caron ” [red label, printed in black].</p> <p> <b>Diagnosis.</b> <i>Hypotelus melanodelta</i> sp. nov. may be distinguished from other species of <i>Hypotelus</i> by the large darker V-shaped area on the elytra and antennomeres 5–10 wider than long (Fig. 13); sternite 8 with posterior margin sinuous (Fig. 79).</p> <p> <b>Description.</b> BL: 2.8 mm, BW: 0.7 mm. Body slightly convex; dorsal surface glossy; brownish, except elytra yellowish (with basal darker area forming somewhat an inverted triangle reaching the middle of elytral suture) (Fig. 13); legs reddish yellow. Dorsal integument of head and pronotum with dispersed fine punctures and undulate microstriae only on margins; elytra with dispersed fine punctures and only one longitudinal finely punctate stria close to elytral suture.</p> <p> <i>Female. Head</i>. Supra-antennal area slightly prominent. Antennae reaching humeral angle; antennomeres 2 and 3 of equal length, antennomere 4 shortest and 5–10 wider than long; 11 longer than the preceding antennomeres.</p> <p> <i>Thorax</i>. Pronotum wider than long (PW/PL=1.2); anterior angles rounded and slightly prominent; apical half with somewhat parallel sides and basal half gradually narrowing toward the base; with complete internal midlongitudinal ridge and slight longitudinal median sulcus only on basal half; one pair of conspicuous setae on anterior margin. Elytra somewhat longer than wide (EL/BW=1.2), not covering abdominal tergite 3.</p> <p> <i>Abdomen</i>. Abdominal tergite 8 with posterior margin rounded; sternite 8 with posterior margin sinuous and with short setae (Fig. 79); tergite 10 with lateral and posterior margins weakly pigmented, with short fringes and four setae on each side at apex; bursa copulatrix as <i>H. pusillus</i>; ovipositor consisting of a pair of weakly pigmented hemisternites and a pair of more apical coxites, and with many long setae on apex; spermatheca as Fig. 91. <i>Male</i>. Unknown.</p> <p> <b>Geographical records.</b> Colombia.</p> <p> <b>Biological notes.</b> No data.</p> <p> <b>Remarks.</b> We received a single specimen (female) from FMNH identified previously as <i>H. micans</i> by Bernhauer, which we consider here as a new species, since the antennomeres 2 and 3 are the same length, in contrast to <i>H. micans</i> that antennomere 3 much shorter than 2 (Sharp 1876, original description), besides the large darker area on elytra.</p> <p> <b>Etymology.</b> The specific name refers to the dark color pattern of elytra and it is a compound name: Greek adjective <i>melan</i> - (black, dark), the connective vowel <i>o</i>, and the Greek noun <i>delta</i> (shaped like a triangle). It is a noun in apposition.</p>Published as part of <i>Bortoluzzi, Sidnei, Caron, Edilson & Ribeiro-Costa, Cibele S., 2017, Revision and phylogeny of Hypotelus Erichson: a Neotropical genus of minute rove beetles (Coleoptera, Staphylinidae, Piestinae), pp. 451-487 in Zootaxa 4273 (4)</i> on page 474, DOI: 10.11646/zootaxa.4273.4.1, <a href="http://zenodo.org/record/803644">http://zenodo.org/record/803644</a>
Evaluation Strategies in University Student Writing: A cross-linguistic and cross-cultural perspective
No full textTwo new species of obligatory termitophilous rove beetles from Brazil (Coleoptera: Staphylinidae: Termitomorpha Wasmann)
No full textCaron, Edilson, Bortoluzzi, Sidnei, Rosa, Cassiano S. (2018): Two new species of obligatory termitophilous rove beetles from Brazil (Coleoptera: Staphylinidae: Termitomorpha Wasmann). Zootaxa 4413 (3): 566-578, DOI: 10.11646/zootaxa.4413.3.1
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