600 research outputs found
Latinopsis Karanovic & Datry, 2009, gen. nov.
No full textGenus <i>Latinopsis</i> gen. nov. <p> <i>L. anisitsi</i> (Daday, 1905) comb. nov. (= <i>Candonopsis anisitsi; =Cubacandona anisitsi)</i>, (non <i>Candonopsis</i> <i>L. columbiensis</i> (Mehés, 1914) comb. nov. (<i>Candona columbiensis; = Candonopsis columbiensis; =Cubacandona columbiensis)</i> (Mehés 1914, Danielopol 1980, Martens & Behen 1994, Karanovic 2004, 2005b)</p> <p> <b>Distribution:</b> Columbia</p> <p> <i>L. patagonica</i> <b>sp. nov.</b></p>Published as part of <i>Karanovic, Ivana & Datry, Thibault, 2009, Overview of Candoninae (Crustacea, Ostracoda) of South America and the West Indies, with the description of two new species and one new genus, pp. 1-25 in Zootaxa 2267</i> on pages 20-21, DOI: <a href="http://zenodo.org/record/190875">10.5281/zenodo.190875</a>
FIGURE 5 in Overview of Candoninae (Crustacea, Ostracoda) of South America and the West Indies, with the description of two new species and one new genus
No full textFIGURE 5. Latinopsis anisitsi (Daday, 1905) Lectotype (male): A, hemipenis; B, left prehensile palp; C, right prehensile palp; D, Md palp; E, CR; F, T2. Scales = 0.1 mm.Published as part of Karanovic, Ivana & Datry, Thibault, 2009, Overview of Candoninae (Crustacea, Ostracoda) of South America and the West Indies, with the description of two new species and one new genus, pp. 1-25 in Zootaxa 2267 on page 12, DOI: 10.5281/zenodo.19087
Candona quasiincarum Karanovic & Datry, 2009, sp. nov.
No full text<i>Candona quasiincarum</i> sp. nov. <p>(Figures 6, 7)</p> <p> <b>Etymology:</b> The species is named after <i>Candona incarum</i> (Moniez, 1899) with the species name prefixed by Latin adverb “quasi”, meaning “appearing as if, like”, referring to the close similarity between the two species.</p> <p> <b>Type material.</b> Holotype female (dissected on one slide, TMAG G5901), 7 paratype females (all in alcohol, TMAG G5902)</p> <p> <b>Type locality:</b> C1BA, Chile, Region XII: Magallanes and Antártica Chilena Region, Madre de Dios Archipelago, Condor lake area, 18/01/2006, T. Datry & T. Lefebure, 50° 17' 28,604 S / 75° 15' 12,924 W.</p> <p> <b>Other material:</b> 10 females (in alcohol, TMAG G5903) from: SN5 AB (Chile, Region XII: Magallanes and Antártica Chilena Region, Madre de Dios Archipelago, Seno nord area, 04/02/2006, T. Datry & T. Lefebure, 50° 15' 30” S / 75° 16'10” W; 6 females (in alcohol, TMAG G5904) from PAC Ben 2 (Chile, Region XII: Magallanes and Antártica Chilena Region, Madre de Dios Archipelago, Pacific cave area, 25/01/ 2006, T. Datry, 50° 22' 35” S / 75° 27' 25” W; female (on slide, TMAG G5905), 4 females (in alcohol, TMAG G5906) from: TAIB (Chile, Region XII: Magallanes and Antártica Chilena Region, Madre de Dios Archipelago, Tarlton island area, 05/02/2006, T. Datry & T. Lefebure, 50° 25' 06” S / 75° 26' 55” W; 2 females (on slide, TMAG G5907 & TMAG G5908), 1 female in alcohol (TMAG G5909) from: 1B Benthos (Chile, Region XII: Magallanes and Antártica Chilena Region, Madre de Dios Archipelago, Guarello base camp area, 06/01/2006, T. Datry & T. Lefebure, 50° 22' 05” S / 75° 20' 58” W.</p> <p> <b>Diagnosis.</b> Species with asymmetrical carapace, LV being considerably larger than the RV. Greatest H around the middle, posterior and anterior setae on caudal ramus long.</p> <p> <b>Description.</b> Dorsal margin evenly rounded, with greatest H situated around middle, equaling 50 percent of total L (Figure 6 A). Ventral margin concave, anterior and posterior margins rounded, the anterior one slightly wider than the posterior one. LV overlapping RV on all free margins, dorsally with a flange, which is weakly developed (Figure 6 B). In dorsal view, greatest W around mid-length (Figure 6 C). Calcified inner lamella narrow, anteriorly 10 percent, posteriorly 8 percent of L. Marginal pore canals straight and relatively dense. Carapace surface without ornamental sculptures, covered only with Porenwarzen from which very short setae originate.</p> <p>A1 (Figure 7 E): 7-segmented. First segment with four setae. Second segment with one anterior seta reaching only end of following segment; second segment with one anterior and one posterior seta, anterior exceeding, while posterior reaching distal margin of fourth segment; fourth and fifth segments with two setae anteriorly and one posteriorly, posterior setae short, while anterior ones long; sixth segment with two posterior (two times longer than terminal segment) and two anterior, long setae, plus very short alpha seta. Terminal segment with two setae, one thin claw and aesthetasc ya which is 1.4 times longer than terminal segment. L ratio of endopodal segments 1: 1: 1: 1: 1.2: 1.8.</p> <p>A2 (Figure 7 A): exopod consisting of plate with one long and two short setae. Two setae on distal end of first endopodal segment subequally long. All t-setae present and subequally long, exceeding by far terminal segment. Seta z1 transformed into claw, slightly exceeding distal end of terminal segment, while z2 and z3 seta like and two times longer than z1. Claws G2, G1, G3 and GM subequally long and almost as long as other terminal claws. Claw Gm 1/3 shorter. All aesthetascs well-developed: Y reaching distal margin of first endopodal segment, y2 and y3 very short, y3 slightly shorter than Gm.</p> <p>Rake-like organ (Figure 7 B): with 7-8 strong teeth.</p> <p>Md palp (Figure 7 F): Palp 4-segmented. First segment with three setae observed. Second segment exteriorly with two long setae exceeding distal end of terminal segment, inner edge with variable number of setae in a group: 3+2 (Figure 7 H), 4+2 (Figure 7 G) and 5+2 (Figure 7 F). Gamma seta smooth. Penultimate segment with three setae exteriorly and four setae distally. Terminal segment with one central claw, one exteriorly claw, and seta interiorly.</p> <p>Mxl palp (Figure 7 D): first segment three plumed and one smooth seta. Second segment with two claws and three setae.</p> <p>T1 (Figure 6 G): with only one a seta, both b and d setae present. Two setae in exopod. Masticatory process with about 10 seate.</p> <p>T2 (Figure 7 C): basal segment with one long seta d1; first and second endopodal segments with one seta each; penultimate segment with two setae. Terminal claw 1.2 times longer than three distal segments combined. Seta h3 twice as long as seta h1.</p> <p>T3 (Figure 6 F): basal segment with only d1 and dp setae. First endopodal segment bare, following segment not subdivided, seta g as long as segment. Terminal segment with three setae, all long, L ratios of h1, h2 and h3 setae 1: 1.5: 1.9.</p> <p>CR (Figure 6 E): all claws and setae well developed. Posterior seta situated on 20 percent of L of posterior margin, and as long as posterior claw. Anterior seta 1/3 of anterior claw. Posterior margin of CR proximally with group of setules. L ratio of anterior margin, anterior and posterior claws 1.4: 1. 3: 1. Caudal seta (Figure 6 D) well developed. Genital field rounded without any process.</p> <p> <b>Dimensions.</b> L of carapace varies from 0.57 mm to 0.92 mm (average 0.68 mm, n=9). Greatest H in all examined specimens varying between 48 percent and 51 percent of total L.</p> <p>No males found.</p> <p> <b>Remarks and affinities.</b> The following <i>Candona</i> Baird, 1845 species were recorded in South America: <i>C. araucana</i> Löffler, 1961; <i>C. parva</i> Daday, 1905; and <i>C. incarum</i> (Moniez, 1899). Martens & Behen (1994) listed another five species: <i>C. albida</i> (Dana, 1852), <i>C. annae</i> Mehés, 1914; <i>C. capsularis</i> Klie, 1935; <i>C. cyproides</i> (Daday, 1905) and <i>C. pedropalensis</i> Mehés, 1914. <i>Candona albida</i> does not belong to the subfamily Candoninae at all, as on the figures provided by Dana (1853), the species is illustrated with the swimming setae on the antenna (Dana 1852: Figure 10). <i>Candona annae, C. capsularis</i> and <i>C. pedropalensis</i> were transferred into the genus <i>Typhlocypris</i> Vejdovský, 1882 by Karanovic (2005a). <i>Candona cyproides</i> is characterized by the presence of the e, and f setae on T3, a posterior seta on the CR which is claw-like and attached at a very proximal position. The absence of the swimming setae and the appearance of the terminal segment of T3 place <i>C. cyproides</i> in the subfamily Candoninae, but the appearance of CR and Mxl palp (with a spatula-shaped terminal segment) place it in the family Cyprididae. Ekman (1908) described <i>Candona pygmea</i> from Sweden, another species with f seta on the cleaning leg, but this is not characteristic of other <i>Candona</i> species. Therefore the position of <i>C. cyproides</i> remains uncertain.</p> <p> <i>Candona quasiincarum</i> <b>sp. nov.</b>, like the other three remaining species of <i>Candona</i> recognized here from South America (<i>C. incarum, C. araucana, and C. parva</i>), has a 4-segmented T3 which makes them an easily recognizable group. The only species with this feature from outside South America is the Holarctic <i>C. candida</i> (O. F. Müller, 1776). All South American species of the genus <i>Candona</i> belong into the <i>candida</i> - group, because the second segment of their Md palp bears an interior group of 5+2 setae. Although it is an important character, it is variable in <i>C. quasiincarum</i>, as there are specimens with 3+2 and 4+2 setae. In one animal, one Md palp carried 4+2, while the other one had 5+2 setae. It is also worth noticing that smaller specimens tend to have fewer setae on the palps. Variability in the number of setae in this place is also noticed in the genus <i>Typhlocypris</i> (see Karanovic 2005a).</p> <p> <i>Candona quasiincarum</i> differs from the remaining species of <i>Candona</i> with 4-segmented T3, in the asymmetrical carapace, the LV being considerably larger than the RV. It differs from <i>C. incarum</i> also in having a much shorter posterior claw on the CR and a slightly different carapace shape: the greatest H in the new species is around the middle, while in <i>C. incarum</i> it is behind the middle, so the frontal margin is narrower than the caudal one. <i>Candona araucana</i> has a carapace shape which is similar to that of <i>C. incarum,</i> but the posterior seta on the CR is positioned more proximal on the ramus than in <i>C. quasiincarum</i>. In contrary to <i>C. quasiincarum, C. parva</i> has (in lateral view) a very wide posterior end of the carapace, the dorsal margin sloping down towards the anterior end, which is considerably narrower than the posterior one. The posterior seta on the CR is very short in <i>C. parva</i>. <i>Candona candida</i> has an almost straight posterior margin of the carapace. There are a few <i>Candona</i> species described from the Lake Baikal (Mazepova 1990) with a 4-segmented cleaning leg, but their carapace shape is different, with many additional differences in the morphology of the soft parts.</p>Published as part of <i>Karanovic, Ivana & Datry, Thibault, 2009, Overview of Candoninae (Crustacea, Ostracoda) of South America and the West Indies, with the description of two new species and one new genus, pp. 1-25 in Zootaxa 2267</i> on pages 13-17, DOI: <a href="http://zenodo.org/record/190875">10.5281/zenodo.190875</a>
Canterburaturus Pesic, Smit & Datry, 2010, n. gen.
No full textCanterburaturus n. gen. Diagnosis. Characters of the Taintaturus genus group (IV-L- 2 dorsoventrally expanded and is the largest of the leg segments; IV-L- 3 very small, with the ventral side reduced more or less to an angle bearing two pairs of setae, see: Cook 1991); anterolateral platelets bearing one pair of glandularia; the pair of glandularia which lie free in the integument in most New Zealand genera are incorporated into the posterolateral platelets; dorsal sclerites smooth or rugose; projections associated with insertions of IV-L relatively large; a pair of glandularia located immediately medial to insertions of IV-L; acetabula numerous; leg segments somewhat laterally compressed. Type species. Canterburaturus minutus sp. nov. Etymology. Named after the Canterbury region where the type species was collected. Remarks. The new genus differs from other Taintaturus -like genera in the pair of glandularia which lie free in the integument in most New Zealand genera but are incorporated into the posterolateral plate in the new genus. Among Taintaturus -like genera, fusion of glandularia 2 with the posterolateral plate is also found in Abelaturus schwoerbeli. Abelaturus -species differ strongly from Canterburaturus and other Taintaturus - like genera in the capitulum attached to a tube of soft integument to produce greatly protrusible mouth parts. This demonstrates that fusion of free glandularium 2 with the posterolateral platelet developed at least two times independently in Taintaturu s-like mites. A key to the Taintaturus —like genera (after Cook 1991, modified to include Canterburaturus) is given below. 1. Capitulum attached to a tube of soft integument to produce greatly protrusible mouth parts........... Abelaturus Cook - Capitulum not protrusible............................................................................................................................................. 2 2. A pair of small glandularia lying free in the integument between anterolateral and posterolateral platelets............... 3 - The above pair of glandularia fused with either the antero- or posterolateral platelets, or with the posteromedial plate..................................................................................................................................................................................... 4 3. Palp segments greatly elongated....................................................................................................... Omegaturus Cook - Palp segments of “normal length”................................................................................................ Taintaturus Hopkins 4. Posteromedial plate with two pairs of glandularia........................................................................................................ 5 - Posteromedial plate with three pairs of glandularia............................................................................ Hestaturus Cook 5. Anterolateral platelets with two pairs of glandularia, posterolateral platelets without glandularia .... Planaturus Cook Anterolateral platelets with one pair of glandularia, posterolateral platelets with one pair of glandularia.................... ................................................................................................................................................. Canterburaturus n. gen.Published as part of Pesic, Vladimir, Smit, Harry & Datry, Thibault, 2010, Water mites (Acari: Hydrachnidia) from the hyporheic waters of the Selwyn River (New Zealand), with descriptions of nine new species, pp. 1-34 in Zootaxa 2355 on pages 19-20, DOI: 10.5281/zenodo.19356
Piotaturus alveocaudatus Cook 1983
No full textPiotaturus alveocaudatus Cook, 1983 Material examined. New Zealand, South Island, Selwyn River near Coes Ford, 24.xi. 2004, 0/ 1 /0. Distribution. New Zealand; previously reported from North and South Island (Cook 1983).Published as part of Pesic, Vladimir, Smit, Harry & Datry, Thibault, 2010, Water mites (Acari: Hydrachnidia) from the hyporheic waters of the Selwyn River (New Zealand), with descriptions of nine new species, pp. 1-34 in Zootaxa 2355 on page 28, DOI: 10.5281/zenodo.19356
FIGURE 3A–B in A redescription of Protolimnesia longa Besch, 1963 from Bolivia, with the first description of the female (Acari: Hydrachnidia: Limnesiidae)
No full textFIGURE 3A–B. Unnamed ephemeral stream the Sacaba area (Cochabamba, Bolivia) during the dry (June 2014, Fig. A) and wet (February 2015, Fig. B) season.Published as part of Pešić, Vladimir, Smit, Harry & Datry, Thibault, 2016, A redescription of Protolimnesia longa Besch, 1963 from Bolivia, with the first description of the female (Acari: Hydrachnidia: Limnesiidae), pp. 81-84 in Zootaxa 4121 (1) on page 84, DOI: 10.11646/zootaxa.4121.1.7, http://zenodo.org/record/25604
FIGURE 22A–C. Zelandalbia acuta Cook, 1991 in Water mites (Acari: Hydrachnidia) from the hyporheic waters of the Selwyn River (New Zealand), with descriptions of nine new species
No full textFIGURE 22A–C. Zelandalbia acuta Cook, 1991, female: A = ventral shield; B = palp (P-1 missing); C = capitulum. Scale bars = 100 μm.Published as part of Pesic, Vladimir, Smit, Harry & Datry, Thibault, 2010, Water mites (Acari: Hydrachnidia) from the hyporheic waters of the Selwyn River (New Zealand), with descriptions of nine new species, pp. 1-34 in Zootaxa 2355 on page 31, DOI: 10.5281/zenodo.19356
Oxus (Flabellifrontipoda) smithi Cook 1983
No full textOxus (Flabellifrontipoda) smithi (Cook, 1983) Material examined. New Zealand, South Island, Selwyn River near Coalgate, 04.vi. 2004, 0/ 1 /0. Distribution. New Zealand; previously reported from North and South Island (Cook 1983).Published as part of Pesic, Vladimir, Smit, Harry & Datry, Thibault, 2010, Water mites (Acari: Hydrachnidia) from the hyporheic waters of the Selwyn River (New Zealand), with descriptions of nine new species, pp. 1-34 in Zootaxa 2355 on page 5, DOI: 10.5281/zenodo.19356
Zelandobates crinitus Hopkins 1966
No full textZelandobates crinitus Hopkins, 1966 Material examined. New Zealand, South Island, Selwyn River near Coalgate, 04.vi. 2004, 0/ 2 /0 (0/ 1 /0 mounted). Distribution. New Zealand; previously reported from North and South Island (Cook 1983).Published as part of Pesic, Vladimir, Smit, Harry & Datry, Thibault, 2010, Water mites (Acari: Hydrachnidia) from the hyporheic waters of the Selwyn River (New Zealand), with descriptions of nine new species, pp. 1-34 in Zootaxa 2355 on page 6, DOI: 10.5281/zenodo.19356
Hydrological connectivity in intermittent rivers and ephemeral streams
No full textIn intermittent rivers and ephemeral streams (hereafter, IRES), hydrological connectivity mediated by either flowing or nonflowing water extends along three spatial dimensions-longitudinal, lateral, and vertical-and varies over time. Flow intermittence disrupts this connectivity, operating through complex hydrological transitions (e.g., between flowing and nonflowing phases). These transitions occur concurrently and interact along all three spatial dimensions, primarily driven by flow regime and catchment geomorphology, modified by human activities. Longitudinally, streamflow cessation and drying interrupt hydrological connectivity, contributing to physicochemical patchiness, habitat isolation, and fragmentation of metapopulations and metacommunities. Laterally, hydrological connectivity established during overbank flows is lost when water levels fall, reducing water-mediated transfers of energy, materials, and organisms from the floodplain and riparian zone. Vertically, flow cessation impairs exchange of surface and shallow groundwater, severely altering hydrological, chemical, and microbial gradients within the sediments. Concurrent interactions and physical discontinuities in hydrological connectivity along these three dimensions produce complex mosaics of physicochemical patches at different scales whose boundaries fluctuate over time in response to the flow regime. This complex patchiness underpins the characteristic physical, chemical, and biological diversity at multiple scales along longitudinal, lateral, and vertical hydrological dimensions in IRES.</p
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