Subisotoma guzeriplica, Potapov, Mikhail, Babenko, Anatoly, Fjellberg, Arne & Greenslade, Penelope, 2009
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publication ID |
https://doi.org/ 10.5281/zenodo.191990 |
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DOI |
https://doi.org/10.5281/zenodo.5687505 |
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persistent identifier |
https://treatment.plazi.org/id/038A87F8-2C18-7F4B-C8B1-FCBEFDE7FE9E |
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treatment provided by |
Plazi |
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scientific name |
Subisotoma guzeriplica |
| status |
sp. nov. |
Subisotoma guzeriplica sp. nov.
Figs 2 View FIGURES 1 – 6 , 38–45 View FIGURES 38 – 45 , Tab. 2
Type material. Holotype, female, Russia, Northern Caucasus, Adygeya, vicinity of Guzeripl' [43° 50’N, 40° 11’E], beech litter, 30.i.–03.ii.2003, leg. D. Shitikov ( MSPU). Paratypes: 2 females and 2 males, the same data as the holotype ( MSPU).
Description. Size up to 0.9–1.1 mm. Colour dark, almost-black, with numerous colourless spots, ventral side also intensely pigmented. Cuticle with medium sized pits densely scattered all over the body. Ocelli 6+6, subequal, ocelli C and H absent, G present ( Figs 44–45 View FIGURES 38 – 45 ). PAO wide elliptic, without constriction, about twice as long as ocellus diameter and slightly shorter than inner unguis (0.9: 1). Maxillary palp simple with 4 sublobal chaetae. Labrum with 2/554 chaetae. Labium with all papillae A–E present, papilla E with 6 guard chaetae (e7 absent) ( Fig. 43 View FIGURES 38 – 45 ), proximal chaetae 3. Basomedial and basolateral fields of labium with 4 and 5 chaetae. Ventral side of head with 4+4(5) postlabial chaetae. Ant.1 with 2 bms (dorsal and ventral) and 2 ventral sensilla (s), Ant.2 with 3 bms and 1 distal s, Ant.3 with 1 bms and 5 distal s, including one lateral in АО. Inner sensilla of АО clearly broadened, the number of additional sensilla on dorsal side of the segment varies from 1 to 3 ( Figs 39–40 View FIGURES 38 – 45 ). Ant.4 with numerous poorly differentiated sensilla, subapical organite small, microsensillum present.
All terga with dense cover of short, uniform chaetae, macrochaetae poorly developed. On Abd.V longest chaetae about 0.2 times as long as tergite length. Dorsal axial chaetom as 8–10,7–9/5–7,5–6,6–7. Tergal sensilla shorter and more slender than ordinary chaetae, medial ones on Abd.I–III set slightly in front of prow. Sensillar formulas 33/22234 (s) and 10/101 (ms) ( Figs 2 View FIGURES 1 – 6 , 38 View FIGURES 38 – 45 ). Only 1+1 ventral chaetae present on Th.III. Unguis usually toothless. Ti.1–3 with 22–23–24 chaetae. Tibiotarsal tenent chaetae 1–2–2, clearly clavate, longer than inner edge of unguis (U3: t.ch. = 0.7–0.8). Modified chaetae x and B5 on Ti. 3 in males truncate and slightly thickened. Ventral tube with 4+4(5) lateral and usually with 4 posterior chaetae. Tenaculum with 3+3 teeth and one chaeta. Anterior furcal subcoxae with 7–11, posterior ones with 6–9 chaetae. Manubrium without anterior chaetae, posterior side with 10–12+10–12 chaetae, laterobasal lobes usually with 4 chaetae ( Fig. 42 View FIGURES 38 – 45 ). Dens with one anterior and 4 posterior chaetae ( Fig. 41 View FIGURES 38 – 45 ). Mucro narrow and rather long, with 2 teeth and lateral lamella. Ratio of manubrium: dens: mucro = 4–7: 3–5: 1. Each anal lobe with 3 tiny equal setulae.
Affinity. The unusual reduction of ocelli C and H and the number of abdominal macrosensilla easily identify the species. In the family Isotomidae ocelli G and H are usually lost at the first step of reduction. Distribution. Known only from the type locality in Northern Caucasus.
Name derivation. Named after the village Guzeripl' because of their hospitality to a group of MSPU students when collecting the new species.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.