141,993 research outputs found
Iberobathynellini Camacho and Serban 1998
No full textTribeIBEROBATHYNELLINI Camacho and Serban, 1998 Tribe diagnosis Thoracopod 8 male of `Iberobathynella ' type; antenna small and three-segmented with four setae on the end segment; antennule with seven segments; labrum with eight main teeth; coxa of thoracopods 1±7 (6) with distinct conical projection at inner distal border; thoracopod 1 without epipodite; and the connecting plane between the mandibles and the cephalon very inclined.Published as part of Camacho, A. I., Serban, E. & Guil, N., 2000, Phylogenetical review and biogeographic remarks on the interstitial and subterranean freshwater iberobathynells (Crustacea, Syncarida, Parabathynellidae), pp. 563-585 in Journal of Natural History 34 (4) on page 567, DOI: 10.1080/002229300299444, http://zenodo.org/record/474749
Caracterização bio-sedimentológica e proposta de setorização das lagunas de Camacho & Garopaba do Sul e Santa Marta, Santa Catarina, Brasil
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Geografia.As lagunas de Santa Marta e do Camacho & Garopaba do Sul encontram-se localizadas no litoral sul do Estado de Santa Catarina, entre os municípios de Laguna, Jaguaruna e Tubarão e apresentam potencial para o desenvolvimento de atividades ligadas à pesca artesanal, rizicultura, maricultura, extração de conchas, turismo e expansão imobiliária. O objetivo central deste trabalho é caracterizar o substrato destas lagunas com o objetivo de identificar setores com padrões sedimentológicos diferenciados. Para isso foram coletadas 5 amostras de sedimentos superficiais na laguna de Santa Marta e 11 em Camacho & Garopaba do Sul. Neste conjunto de 16 amostras foram realizadas analises granulométricas, quantificação da matéria orgânica total, do carbonato biodetrítico total, dos nitrogenados inorgânicos dissolvidos, dos fosfatos dissolvidos e da sílica dissolvida. Foi realizado também um estudo da distribuição de foraminíferos bentônicos e de tecamebas indicadores do balanço fluvio-marinho dentro da área. Estudos morfométricos, como área, volume, perímetro, comprimentos e larguras máximas, profundidade média e máxima e pista de vento foram quantificados para auxiliar nas interpretações sedimentológicas. A integração dos dados foi realizada através de técnicas estatísticas univariadas (correlações) e multivariadas (analise de agrupamento e componentes principais). Baseado nos parâmetros biogeoquimicos e morfométricos foi possível identificar na laguna de Santa Marta dois setores distintos sedimentologicamente # setor 1 e 2 # sendo que o ponto amostral denominado como C6 localizado no sul da laguna de Garopaba do Sul apresentou características semelhantes ao setor 2 e por isso foi agrupado a este. Na laguna de Camacho & Garopaba do Sul foram identificados mais dois setores distintos, os setores 3 e 4. Estes encontram-se dispostos ao longo de um gradiente longitudinal ao eixo lagunar principal, individualizando sedimentologicamente o segmento do Camacho do segmento de Garopaba do Sul. A distribuição destes setores parece estar relacionada com as condições fisiograficas locais e com os agentes hidrodinâmicos atuantes na área, sobretudo a ação eólica
Corydalus muzoensis Ardila-Camacho, sp. n.
No full text<i>Corydalus muzoensis</i> Ardila-Camacho sp. n. <p>(Figs. 4, 5)</p> <p> <b>Diagnosis.</b> Distinguished by having the head, antennae and thorax dark reddish brown; male genitalia with ninth gonostyli unguiform, with a conspicuous apical claw. Ninth sternite with a large and acuminate posteromedian projection that extends near to midlength of the tenth gonostyli. Posterolateral lobes well developed, acuminate with the apices slightly directed mesally. Tenth gonostyli strongly sclerotized, digitiform with acute apex, and extremely long.</p> <p> <b>Description.</b> Mandible length: 8 mm; antennae length: 30 mm; head width: 7 mm; forewing length: 45 mm; hindwing length: 40 mm; headlength (longitudinal): 12 mm; prothorax length: 5 mm; pterothorax length: 5 mm.</p> <p> <b>Head.</b> Dark reddish brown, antenna filiform without denticulations, with 56 segments including the scape and pedicel, all dark reddish brown and covered with small black setae. Male mandibles elongate with dentition not entirely reduced consisting in three preapical teeth, the third separated from the first two (Fig. 4 e). Clypeal margin with prominent lateral projections, medial projection attenuate, slightly incised (Fig. 5 b). Maxilla and labium dark brown. Eyes dark brown, postocular spine attenuate (Fig. 4 e).</p> <p> <b>Thorax.</b> Pronotum dark reddish brown, slightly patterned, posterior region with conspicuous mesal sulcus (Fig. 4 e). Meso- and metathorax brown, densely covered with fine setae. Meso- and metaescutum with two lateral dark brown spots.</p> <p> <b>Wings.</b> Forewing with costal field wide, brown infuscated; 19-20 costal crossveins dark brown. Two conspicuous pale pterostigmal-like areas (Fig. 4 a). Subcostal field brown with a basal crossvein. Radial field brown, except for some small pale circular white spots, with two or three of these in the cell R2. Rs with six forks and 14 crossveins; seven or eight longitudinal veins arriving to the posterior wing margin. Four crossveins between MP and CuA, the second crossvein and the MP fork with dark brown spots. Vein MP1+2 with a single fork, MP3+4 without forks. CuA with four forks. Stem of CuP dark brown pigmented. Hindwing membrane pale, semitranslucent, except some radial crossveins. Costal field composed of 12 or 13 crossveins; pterostigmal-like areas pale, scarcely perceptible. Rs with seven forks and 13 crossveins; eight veins arriving posterior wing margin. Four crossveins between MP and CuA; CuA with five forks (Fig. 4 a).</p> <p> <b>Legs.</b> Mostly brown, densely covered with fine ochreous setae. Apex of femur and base of tibia dark brown; tarsal claws dark brown, short, as long as second tarsomere.</p> <p> <b>Abdomen.</b> Predominantly brown, covered with small setae of the same color as cuticle.</p> <p> <b>Male genitalia.</b> Ninth tergum subquadrate, V-shaped internal inflection reaching less than midlength of tergum. Anal tubercle partially covered by the eleventh tergum (Fig. 4 c). Ectoproct elongate, apex rounded, thumblike, subequal in width to base, densely covered with golden setae (Figs. 4 c, d). Ninth sternite moderately convex, with large and acuminate posteromedian projection extending to near of midlength of the tenth gonostyli (Figs. 4 b). Posterolateral lobes well developed, apices slightly directed mesally, densely covered with ochreous setae (Fig. 4 b). Pregenital sacs inconspicuous, apparently absent. Sack between the ninth sternite and tenth gonocoxite well developed, conspicuous, with dorsal crests. Ninth gonostyli unguiform, slightly widened at base in lateral view, short, with a conspicuous apical claw, posterodorsally directed, apex abruptly directed mesally (Figs. 4 b, c, d). Posterior edge of tenth gonocoxite rounded and well sclerotized. Tenth gonostyli very long, distinctly curved ventrad, digitiform with acute apex, strongly sclerotized, covered with small brown setae (Fig. 4 f); tenth gonocoxite elongate, slightly longer than the tenth gonostyli (Fig. 5 b).</p> <p> <b>Geographical distribution.</b> Colombia.</p> <p> <b>Adult flight period.</b> The specimen was collected during July.</p> <p> <b>Bionomic data.</b> The specimen was attracted to yellow light near a tributary stream of the Minero River.</p> <p> <b>Etymology.</b> Named for its place of collection, the Muzo Municipality in the western province of Boyacá (800 m), the ancient territory of the native Indian tribe “Muzos”.</p> <p> <b>Female.</b> Unknown.</p> <p> <b>Type material.</b> Holotype ♂: <b>Colombia: Boyacá:</b> Muzo, 845 m, 5°31’0’’N – 71°7’0’’W, 28-VII-2011, A. Páez, <i>Corydalus muzoensis</i> Ardila-Camacho (MUD-MEG001). Holotype condition: good, pinned, lacking right antenna, genitalia preserved in glycerol.</p>Published as part of <i>Ardila-Camacho, Adrian, 2014, A new species of Corydalus Latreille, 1802 (Megaloptera, Corydalidae) and first record of C. clavijoi Contreras-Ramos, 2002 and C. nubilus Erichson, 1848 from Colombia, pp. 107-118 in Zootaxa 3811 (1)</i> on pages 112-115, DOI: 10.11646/zootaxa.3811.1.6, <a href="http://zenodo.org/record/224666">http://zenodo.org/record/224666</a>
Pesca e sazonalidade no Camacho/SC: um estudo de modos de vida em deslocamento
No full textDissertação(mestrado) - Universidade Federal de Santa catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Antropologia SocialEsta dissertação tem como objetivo descrever e analisar a pesca e a sazonalidade entre os moradores do Camacho, município de Jaguaruna - SC. Nesta localidade os ciclos da pesca orientam os modos de vida dos pescadores. A pesca, portanto, é a principal atividade de trabalho, mas os "camacheiros" não a exercem de forma exclusiva. Os pescadores e suas famílias seguem um amplo calendário de atividades que se divide entre inverno e verão. No verão ocorre o deslocamento para o Estado do Rio Grande do Sul, migração realizada anualmente durante as safras de peixe e de camarão que se tornaram os "produtos preferenciais" para os pescadores. A sazonalidade, construída pelos moradores do Camacho, abrange a localidade como um todo, expressa uma organização social que se pauta no deslocamento para outras lugares ou entre diferentes opções de trabalho, conferindo dinamismo e sincronicidade à vida no Camacho. Com este estudo pretendo contribuir para a reflexão sobre os grupos que vivem da pesca, dando ênfase aos significados que os próprios sujeitos conferem ao seu modo de vida
Isostenosmylus septemtrionalandinus Ardila-Camacho & Noriega 2014
No full textIsostenosmylus septemtrionalandinus Ardila-Camacho & Noriega, 2014 (Figs. 28, 29) Isostenosmylus septemtrionalandinus Ardila-Camacho & Noriega, 2014: 324, figs. 2c, 3b, e, f, 5a, b, 6 (habitus, head, thorax, wings, legs, female terminalia and genitalia). Ref. Ardila-Camacho & Noriega (2014). Holotype female, IAvH. Type-locality. Colombia: Santander, Nudo de Santurbán, Poveda stream, 07°27’N −72°49’W, 2000 m, 18.iii ~ 03.iv.2002. Material examined. Holotype, “ Colombia: Santander, Nudo de Santurbán, Poveda stream, 07°27’N −72°49’W, 2000 m, 18.iii ~ 03.iv.2002, A. Santamaría, Malaise trap, M.3106” (1♀ IAvH). Distribution (Fig. 43). Colombia (Santander). Principal characteristics. Head brown with two dark brown spots below antennae; clypeus and labrum light brown with yellowish setae; labial palpi light brown at the base and dark brown at the apex; maxillary palpi pale brown; vertex brown with some brown setae; sutures bordering dark brown; occiput pale yellowish brown; antennae yellowish brown, scape almost as long as pedicel; flagellomeres almost as long as broad, covered with pale yellow setae. Pronotum pale brown with two posterolateral elongated black spots, densely covered by elongated dark brown and pale yellow setae, mainly laterally; mesonotum brown with three pairs of black spots and some dark brown setae; metanotum brown with a pair of large black spots. Legs yellow with many small dark brown spots. Forecoxa of female with a short pointed process near of apex. Wings hyaline with venation alternating brown and pale yellow, pterostigma well-marked (Fig. 28 A); forewing with some amber spots, mainly in radial trace, several costal crossveins forked near to the costal margin; hindwing without dark spots. Abdomen with tergites mottled by dark brown and yellowish brown. Female (Figs. 28 C–F, 29). Fused ninth gonapophyses Y-shaped in ventral view, with two apical elongated lobes; two lateral mammiliform lobes in the fused eighth gonocoxites; ninth gonocoxites acuminate, with ventral margin curved; spermathecae reniform.Published as part of Martins, Caleb Califre, Ardila-Camacho, Adrian & Aspöck, Ulrike, 2016, Neotropical osmylids (Neuroptera, Osmylidae): Three new species of Isostenosmylus Krüger, 1913, new distributional records, redescriptions, checklist and key for the Neotropical species, pp. 1-66 in Zootaxa 4149 (1) on pages 38-43, DOI: 10.11646/zootaxa.4149.1.1, http://zenodo.org/record/25680
Scolopendrelloides pseudocongolensis Camacho, 2010, n. sp.
No full textScolopendrelloides pseudocongolensis n. sp. Material examined. 12 specimens from the Democratic Republic of the Congo. Type material. Holotype: RMCA 22141, adult female (?), 2.3 mm, Albert National Park, Secteur Ruwenzori, Katsangu, près Kalonge, 2000 m. alt., 12.II. 1953, collected by P. Vanschuytbroeck and J. Kekenbosch. Paratypes: RMCA 22142, 1 adult male and 1 adult female, about 2 mm, same data as holotype; RMCA 22143, 1 adult, sex unknown, 2 mm, Albert N.P., Secteur Sud, riv. Rumanura, affl. Fuko, 3.XII. 1954, collected by De Witte; RMCA 22144, 1 adult female, 3 mm, and 1 juvenile male with 10 pairs of legs, about 2 mm, Albert N.P., Sect. Ruwenzori, camp Kikura (N 00º 35 ’ E 029º 57 ’ 2265 m), 24.V. 1957, collected by P. Vanshuytbroeck; RMCA 22145, 2 adult females, about 2 mm, face N. du Ruwenzori, Kilindera (N 00º 23 ’ E 029º 55 ’ 2750 m), VII–VIII. 1974, collected by M. Lejeune; RMCA 22146, 1 adult female, 2.2 mm, Albert N.P., sect Ruwenzori, Kalonge, riv. Nyamwamba, affl. Butahu (00º 20 ’ E 029º 49 ’ 2480 m), 25–29.VIII. 1952, collected by P. Vanshuytbroeck and J. Kekenbosch; RMCA 22147, 1 adult female, 2.2 mm, 1 juvenile male with 11 pairs of legs, 2 mm, and 1 juvenile male (?) with 10 pairs of legs, 1.2 mm, Albert N.P., Sect. Ruwenzori, Kalonge, gîte Ruwenzori (N 00º 20 ’ E 029º 49 ’ 2080 m), 24–29.IX. 1952, collected by P. Vanschuybroeck and J. Kekenbosch. Length 2–3 mm. Head 1.15 times as long as broad, somewhat heart-shaped and a bit flattened laterally (Fig. 2 B). Central rod complete until the most posterior point of the head, but it disappears in the median part. Posterior triangular area very conspicuous. Lateral branches present, straight and conspicuous until the median part of the head. Only the small exterior opening of the Tömösváry’s organ sometimes visible. Dorsal surface of the head with thin, straight setae. Cuticle glabrous. Antennae. Only 3 antennae from 2 specimens are unbroken. The number of segments segments there is 23, 23 and 27. Tergites. First tergite small, subelliptical and about five times as wide as long, with 10–12 setae of which 3 or 4 are considerably longer than others. Following tergites large and flat, with the hind margin slightly emarginated (Fig. 2 B). They cover the whole body since they are wider than the width of the body. Second and third tergites with a somewhat angular appearance, with distinct lateral angles of the posterior emarginations. They present two lateral macrochaetae on each side, the anterior one a bit longer than the posterior. Following tergites with at least a pair of outwards directed macrochaetae. Tergites 4–11 with more rounded margins and very slight posterior emarginations. Lateral angles sometimes not distinct, totally rounded in some specimens. Cuticle of all tergites glabrous, with a very slight mesh pattern only visible on some tergites. At the most anterior part of some tergites, lateral lines with rows of tiny backwards directed setae are present. Penultimate tergite with a single pair of macrochaetae and 5 marginal setae in the emargination (Fig. 2 C). Cerci 3 times as long as wide (Fig. 2 C). Margins nearly straight, with a moderate number of setae. Proximal three quarters of cerci conical, distal quarter unusually slender, nearly cylindrical. Cuticle glabrous, with a very slight scaly pattern. External part of the trichobothria’s pit with scales, which present thick spines on the ventral side (Fig. 2 F). Legs. First pair of legs a bit less than half as long as following pair. Tarsus of legs 10–12 of females with two ventral rows of 6–8 splinter–like setae (Fig. 2 D, E). Styli of posterior pairs of legs 4.45 times as long – including the apical seta – as wide and 1.55 times as long as width of tarsus. Pubescence rather sparse (Fig. 2 E). Only one apical seta 0.7 times as long as the stylus without the seta. There are 7 pairs of fully developed coxal sacs at the base of legs 3–9. Differential diagnostic. In the shape of the tergites makes that this species is similar to Hanseniella elgolensis Scheller 1954, specially those specimens which present more rounded margins of the tergites. However, the presence of the splinter–like setae exclusively in the females brings it nearer to Scolopendrelloides congolensis.Published as part of Camacho, Miguel Domínguez, 2010, New insights on the genus Scolopendrelloides Bagnall 1913 (Scutigerellidae, Symphyla) with descriptions of two new species, pp. 48-60 in Zootaxa 2558 on pages 51-52, DOI: 10.5281/zenodo.19697
Ponciano Camacho in shack
No full text''Ponciano Camacho in his cold, wet home. Feeble man taken to Bexar County Home for the Aged.''''Three years in a chicken coop ''''. came to an end Saturday for Ponciano Camacho, about 89...The coop in which Camacho lived is in the rear of 830 N. Flores St. The bare earth is its floor. The only shelter it affords is a leaky tin roof. It has no walls, being enclosed with heavy mesh wire...The aged man, racked with cough and unable to walk, was rolled in numerous quilts on an old cot'
Hobbsinella Camacho, Hutchins, Schwartz, Dorda, Casado & Rey 2018
No full textGenus <i>Hobbsinella</i> Camacho, Hutchins, Schwartz, Dorda, Casado & Rey, 2018 Type species <p> <i>Hobbsinella edwardensis</i> Camacho, Hutchins, Schwartz, Dorda, Casado & Rey, 2018</p> Amended diagnosis <p>AI and AII seven-segmented. AII longer than AI. Md palp sexually-dimorphic. Endopod of ThI to VII each four-segmented.Male ThVIII of globular aspect; penial region with two small lobes, inner lobe, and a frontal projection, and with a group of small denticles at base; basipod large, vertical, with frontal crest provided with teeth and lateral rim of spines and one distal seta and a large outer protuberance completly integrated on coxopod; exopod very elongated, as long as preceding thoracopods, with five setae; endopod with two setae of different size. Female ThVIII with a reduced ‘seta’ on coxopod or without seta; epipod very large; exopod longer than endopod. Uropod: sympod with five spines; endopod with three or four spines. Furcal rami with second spine sligthly longer than rest, which are all equal in length.</p>Published as part of <i>Camacho, Ana Isabel, Mas-Peinado, Paloma, Bonwell, Carly B., McDONALD, Jenna N., Dorda, Beatriz A., Rey, Isabel & Taylor, Steven J., 2023, Description of a new species of Hobbsinella (Crustacea, Bathynellacea, Bathynellidae) from Colorado (USA) based on morphological and molecular characters, pp. 87-109 in European Journal of Taxonomy 891 (1)</i> on pages 95-96, DOI: 10.5852/ejt.2023.891.2273, <a href="http://zenodo.org/record/8367934">http://zenodo.org/record/8367934</a>
Figure 6. Paraeobathynella vietnamensis n. g. n in Disentangling an Asian puzzle: Two new bathynellid (Crustacea, Syncarida, Parabathynellidae) genera from Vietnam
No full textFigure 6. Paraeobathynella vietnamensis n. g. n. sp., male holotype. (A) Thoracopod 6; (B) thoracopod 7. Scale bar in mm.Published as part of Camacho, Ana Isabel, 2005, Disentangling an Asian puzzle: Two new bathynellid (Crustacea, Syncarida, Parabathynellidae) genera from Vietnam, pp. 2861-2886 in Journal of Natural History 39 (31) on page 2869, DOI: 10.1080/00222930500218524, http://zenodo.org/record/521993
Placomerus obscuratus Sites & Camacho, NEW SPECIES
No full textPlacomerus obscuratus Sites & Camacho, NEW SPECIES Figs. 2–5 Description. Brachypterous male. HOLOTYPE, length 6.08; maximum width 3.76. Paratypes (n = 10), length 6.08–6.80 (mean = 6.30); maximum width 3.68 –4.00 (mean = 3.74). Ovate. Dorsally, overall coloration light brown anteriorly with dark brown wings; glossy and punctate throughout (Fig. 2). Ventrally, mostly yellowish brown. Head, pronotum, scutellum, and hemelytra sparsely covered with fine setae. Head. Length 1.16, maximum width 2.20; inner margin of eyes distinctly concave; synthlipsis at anterior margin 0.94, interocular distance at posteromesal corners 1.06; head margin laterad of eye narrow, widening anteriorly; yellowish brown with scattered brown punctation, series of dark brown punctures paralleling inner margin of eyes especially pronounced in basal half; labrum subtriangular, apex broadly rounded, 1.65 times as wide as long; antennal proportions 3: 9: 11: 6. Thorax. Pronotum broad, 2.3 x as wide as long, length at midline 1.40; maximum width at posterolateral corners 3.20; transverse, impunctate band in posterior ¼ along margin set off by irregular row of distinct punctures; anterior 3 / 4 with many small shallow brown punctures; sparsely scattered, distinct larger dark punctures; laterally with narrow rim set off by groove with punctures; lateral margins gently convex, convergent anteriorly; posterolateral corners rounded; posterior margin shallowly convex. Ventrally yellowish brown coloration becoming dark brown near mesal margin of propleuron; patch of stout setae on dark marking of propleuron at base of coxa. Scutellum with many small, light colored punctures; irregularly mottled with yellow and brown; apex yellow; triangular with shallowly sinuate posterolateral margins, 1.8 x as wide as long, width 1.90, length 1.06. Hemelytra dark brown with subtle reddish mottling, with many small, light colored punctures. Clavus 4.2 x as long as wide, length 2.60, width at middle of scutellum 0.62. Claval commissure locking mechanism length 0.62. Embolium length 2.04 (chord measurement), greatest width 0.64; strongly widened in distal half; lateral margin evenly convex; yellowish brown in anterior 2 / 3, brown posteriorly. Meso- and metasterna mostly pruinose. Hindwing extending posteriorly to middle of abdominal tergum II. Mesosternum with midventral tumescence and elongate setae. Legs. Coxa, trochanter, femur, tibia yellowish brown; tarsus, pretarsus darker. Mesotrochanter with heavy brush of light colored hairs along posterior surface. Mesofemur width 35 % that of length; with posteroventral row of 34–38 stout, single brown spines; spines subequal from base to near apex, penultimate spine elongate, distal spine slightly shorter than penultimate spine; comb of 6–7 stout hairs distad of spines; posterodorsal margin extended posteriorly and with heavy brush of light colored hairs beginning at apex of trochanter, extending for ca. half length of femur. Mesotibia width 32 % that of length. Meso- and metatibia short, stout, with stout reddish brown elongate spines. Meso- and metapretarsal claws elongate, gently curved. Leg measurements as follows: foreleg, femur 1.48, tibia 0.68, tarsus 0.40, pretarsal claw 0.38; middle leg, femur 1.42, tibia 0.86, tarsomeres 1–3 0.10, 0.34, 0.34; hind leg, femur 1.64, tibia 1.42, tarsomeres 1–3 0.12, 0.64, 0.54, pretarsal claw 0.42. Abdomen. Lateral margins smooth; with fine, light-colored hairs on III-VIII. Posterolateral corner of segment II square, III produced, IV-VII spinose. Ventrally golden brown, darker laterally, with fine pile of short setae throughout and sparse, scattered elongate setae, and dense mid-ventral band of light colored hairs beginning on VI, continuing to posterior margin of abdomen. Posterior margin of mediosternite III, IV straight, V deeply incised medially, VI asymmetrical with medial convexity and dextral concavity. Male genitalia. Aedeagus slender, elongate, laterally compressed, gently arcuate to left, apex broadly rounded to slightly acuminate (Fig. 3). Parameres slender, elongate, longitudinally concave, asymmetrical, left overlapping right apically, each with 3 lobes, dorsal and ventral surfaces with sparse setae (Fig. 4). Pygophore with margin between parameres strongly convex and rounded (Fig. 3), with fine setae. Brachypterous female. Size (n = 10): Length 6.16–6.84 (mean = 6.40); maximum width 3.76–4.24 (mean = 3.93). Coloration and setation generally same as for male. Otherwise: Mediosternites III–VI with posterior margin straight. Subgenital plate with middle third glabrous, broadly triangular with apex narrowly rounded, apical ¼ abruptly narrowed (Fig. 5), longitudinally strongly concave such that apex nearly semicircular in posterior view, width 1.12 mm, length 0.96 mm. Macropterous male. (n = 2). Length 5.76–6.40 (mean = 6.08); maximum width 3.72 –4.00 (mean = 3.86). Coloration, setation, pronotum proportions, posterolateral corners of pronotum, scutellum proportions generally same as for brachypterous male. Otherwise, clavus and claval commissure correspondingly longer: Clavus 4.7 x as long as wide, length 2.60; width at middle of scutellum 0.60; claval commissure locking mechanism length 0.68. Hindwing extending to middle of tergum VIII. Macropterous female. (n = 2). Length 6.56; maximum width 3.92 –4.00 (mean = 3.96). Coloration, setation, pronotum proportions, posterolateral corners of pronotum, scutellum proportions generally same as for brachypterous female. Otherwise, clavus and claval commissure correspondingly longer: Clavus 5.0 x as long as wide, length 3.12; width at middle of scutellum 0.62; claval commissure locking mechanism length 0.72. Hindwing extending to middle of tergum VIII. Diagnosis and comparative notes. We compared this new species with the holotype of P. micans at the California Academy of Sciences and with paratypes from the United States National Museum of Natural History, Essig Museum of Entomology at the University of California - Berkeley, and Snow Museum at the University of Kansas. An additional paratype in the British Museum of Natural History was examined but not used for comparison. Both species appear highly polished. P. obscuratus can be distinguished from P. micans by the narrower clavus, which ranges in length/width from 4.2 to 5.0 mm when considering both sexes and wing morphs; whereas the P. micans paratypes ranged from 3.1 to 3.9 (all with brachypterous hindwings). In the P. micans paratype at USNM (Fig. 1), the clavus is noticeably wider than in the other P. micans paratypes that we have examined; however, all are proportionately wider than in all specimens of P. obscuratus. In addition, the interocular distance measured at its widest point in comparison with maximum head width is significantly smaller in P. obscuratus [t(23) = 9.17, p <0.0001]. Specifically, interocular distance/head width averaged 0.53 in P. obscuratus and 0.57 in P. micans. The hemelytra are substantially darker in P. obscuratus. The posterolateral margins of the scutellum are nearly straight in both wing morphs of P. obscuratus and concave in P. micans. The aedeagus and parameres appear quite similar in both species, although the apex of the aedeagus is truncate in the two paratypes of P. micans from which we extracted genitalia, whereas it is broadly rounded to slightly acuminate in P. obscuratus. Discussion. Hindwing polymorphy with brachypterous and macropterous forms occurs in various genera of Naucoridae (e.g., Ambrysus and Limnocoris in the New World and many others in the Old World) whereas length of the forewings is largely unaffected. Placomerus micans is known only from hindwing brachypterous individuals from southern South America. However, this new species is represented by brachypterous and macropterous individuals, with both forms co-occurring in some populations. Specimens from the type locality in Guyana are predominantly brachypterous, whereas most of the specimens examined from various localities in Venezuela are macropterous. Unlike most other genera with hindwing brachyptery, associated differences in development of the posterolateral corners of the pronotum and diminishment of the clavus are not seen in P. obscuratus, although these features are apparent in the congener P. micans. Habitat description. Paul Spangler's field notes included the following information about the type series collection in Guyana: "seepage pools beside airstrip & at falls." Spangler also noted animal associates with the type series collection: " Laccophilus, veliids: Microvelia ayacuchana & Microvelia sp.", and a separate quantified listing: " Microvelia - 192, gerrids- 16, corixids- 2, naucorids- 58, Laccophilus - 16, Paracymus - 1, fish- 3, weevil- 1." The Venezuelan specimens were collected from grassy flooded areas, an isolated forest pool in a streambed, a rock pool, pool in culvert, and shallow backwaters. Etymology. The specific epithet obscuratus is in reference to the darkly colored hemelytra and scutellum in comparison to those of the congener P. micans. Repositories. The holotype and some paratypes are deposited in the United States National Museum of Natural History. Additional paratypes are deposited in Universidad del Zulia, Maracaibo; Museo del Instituto de Zoologia Agrícola, Maracay; Naturhistorisches Museum, Vienna; Snow Entomological Museum Collection, Lawrence; and University of Missouri, Columbia. Type material examined. HOLOTYPE, brachypterous ♂: GUYANA: Kaieteur Falls, 0 5 o 10 ’N, 59 o 28 ’W, 357 m, 7 Apr 1994, PJ Spangler, # 20. PARATYPES: same data as holotype (18 brachypterous ♂, 14 brachypterous ♀, 2 macropterous ♂, 2 macropterous ♀). VENEZUELA: AMAZONAS: river nr. Orinoco/Sipapo confl., 5 o 03.707’N 67 o 46.768 ’W, 92 m, 15 January 2009, expedition team, VZ09-0115-01A, in/along river (1 macropterous ♀); same data, shallow backwaters, leg. A. Short, VZ09-0115-01C (1 macropterous ♂); same data, leg. M. García, VZ09-0115-01D, rock pool (1 macropterous ♀); S. Communidad Porvenir, 5 o 0.514 ’N 67 o 45.315 ’W, 87 m, 15 January 2009, leg. Short & García, VZ09-0115-03A, pool in culvert (1 macropterous ♀); nr. Iboruwa, "Tobogancito", 5 ° 48.414 'N, 67 ° 26.313 'W, 80 m, 13.i. 2009, leg. A. Short et al., VZ09-0113- 02X (2 macropterous ♂). APURE: ca. 6 km S. Rio Cinaruco Morichal and marsh, 6 o 30.900 ’N 67 o 32.604 ’W, 8 January 2006, AS-06- 0 19, leg. A.E.Z. Short (1 macropterous ♂, 2 macropterous ♀). BOLÍVAR: Los Pijiguaos, 6 o 35.617 ’N 66 o 49.238 ’W, 80 m, outcrop/morichal, 12 January 2009, leg. García, Short, & Miller, VZ09-0112-01D, isolated forest pool in streambed (5 macropterous ♂, 4 macropterous ♀); same data, but algae on rocky margin of morichal, VZ09-0112-01B (2 macropterous ♂, 3 macropterous ♀); same data but morichal, VZ09-0112- 01X (5 macropterous ♂, 8 macropterous ♀); ca. 20 km E. Maripa, 7 o 26 ’ 23.2 ”N 64 o 57 ’ 5.6 ”W, 45 m, 5 August 2008, leg. A. Short & M. García, grassy flooded area, AS-08-074 (1 macropterous ♂). Other material examined. VENEZUELA: AMAZONAS: 15 km S Puerto Ayacucho, 5 ° 30.623 'N, 67 ° 36.109 'W, 110 msnm, 14 /I/ 2009, J. Camacho, A. Short, M. García, L. J. Joly y L. Miller, colectores, VZ09- 0114-03A (MALUZ, 1 macropterous ♀); ca. 15 km S. Puerto Ayacuho, nr. Campamento Canturama, 5 ° 30.623 'N, 67 ° 36.109 'W, 110 m elev, 14.i. 2009, Short, small seep connecting pools, VZ09-0114-03B (MALUZ, 1 macropterous ♀); rio cerca confluencia Rios Orinoco y Sipapo, 5 °03.707'N, 67 ° 46.768 'W, 92 msnm, 15 /I/ 2009, J. Camacho, A. Short, M. García, L. J. Joly y L. Miller, colectores, VZ09-0115- 01X (MALUZ, 7 macropterous ♂, 9 macropterous ♀); Mcpio Atabapo, San Fernando de Atabapo, 350 m, 06-08/IX/1996, 4°02' 30 "N, 67 ° 42 ' 15 "W, colector J. Camacho, trampa luz eléctrica (MALUZ, 1 macropterous ♀). APURE: 9 /I/ 2006, colectores: J. Camacho, M. García, A. Short (MALUZ, 4 macropterous ♂, 4 macropterous ♀); road between Rio Orinoco and Rio Cinaruco, 17.i.2009, 6° 30.900 'N, 67 ° 32.604 'W, 68 m elev, Short, Miller, Camacho, Garcia, Joly, Morichal margin, VZ09-0117- 01X (MALUZ, 1 macropterous ♂, 6 macropterous ♀). BOLÍVAR: La Gran Sabana, San Francisco de Yuruani, August 2008 / A. Short, M. García, L. Joly colectores, 0 5 o 03’ 21 ”N 61 o 05’ 54 ”W (SEMC, UMC, MALUZ, 1 macropterous ♂, 8 brachypterous ♂, 1 brachypterous ♀); 25 km al E de El Burro, 6 ° 13´4.6 "N, 67 ° 14´26.4 "W, 60 msnm, 13 /I/ 2009, VZ09-0113-01 (MALUZ, 1 macropterous ♂, 2 macropterous ♀). GUARICO: San Nicolasito Field Station, Rio Aguaro, 8 ° 6.226 'N, 66 ° 26.228 'W, 52 m elev, 10.i. 2009, Short, García, Camacho, Miller, Joly, along river VZ09-0110-01A (MALUZ, 2 macropterous ♂, 2 macropterous ♀).Published as part of Sites, Robert W. & Camacho, Jesús, 2014, Neotropical genera of Naucoridae (Hemiptera: Heteroptera: Nepomorpha): New species of Placomerus and Procryphocricos from Guyana and Venezuela, pp. 469-482 in Zootaxa 3753 (5) on pages 471-474, DOI: 10.11646/zootaxa.3753.5.5, http://zenodo.org/record/22431
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