Pleurocryptella altalis Williams & Boyko & Marin 2020, sp. nov.

• Main Authors: Williams, Jason D., Boyko, Christopher B., Marin, Ivan N.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Bopyridae; Pleurocryptella; Pleurocryptella altalis; Kamchatka
• Online Access: https://zenodo.org/record/5636993; https://doi.org/10.5281/zenodo.5636993

Pleurocryptella altalis sp. nov. urn:lsid:zoobank.org:act: 65006984-C3F1-4C31-ABEF-8225A15F921E Figs 1–3 “C параЗИтИческой ИЗоподой под карапаксом” – Birstein & Zarenkov 1970: 423, fig. 1. “parasitic isopod” – Birstein & Zarenkov 1972: 442, fig. 1. “bopyrid parasite” – Boyko et al. 2012: 25, table 1. — Marin 2020: 2, figs 1a, 17f. Etymology Combination of Latin words ‘ altum ’ (‘deep’) and ‘ alis ’ (‘pertaining to’) in reference to its occurrence at the greatest depth known for any bopyrid species. Type material Holotype KURIL-KAMCHATKA TRENCH • ♀ (10.4 mm TL) from right branchial chamber of ♂ Munidopsis petalorhyncha Baba, 2005 (21.0 mm CL, 15 mm CW, ZMMU Ma 3504); 39 th cruise of R/V ‘ Vityaz ’, stn 5621, Sigsbee trawl; 45°18′ N, 156°00′ E; depth 5060–5130 m; 17 Aug. 1966; ZMMU Mс 1420. Allotype KURIL-KAMCHATKA TRENCH • 1 ♂ (4.3 mm TL); same collection data as for holotype; ZMMU Mс 1421. Description Female (Figs 1B, 2) Body length 10.4 mm, maximum width 6.8 mm across pereomere 3, head length 1.9 mm, head width 3.0 mm. Body ovoid, pereon very slightly deflexed dextrally (Figs 1B, 2A), all body regions and pereomeres distinctly segmented. Head subrectangular, broader than long, with frontal lamina extending beyond pereomere 1 and rounded extensions laterally (Fig. 2A), eyes lacking. Barbula with two long, thin, tapering lateral lobes, subequal in length (Fig. 2C).Antennules of three articles each, terminal article minute, setose; antennae of five articles each, terminal article setose (Fig. 2D). Maxilliped (Fig. 2E) with minute setae, most prominent on distal margin, short subacute spur; segmented subcylindrical palp present, with stout setae. Oostegite 1 (Fig. 2 F–G) proximal lobe ovate, distal lobe approximately 50% narrower than proximal lobe, internal ridge smooth (Fig. 2G). Pereon of seven pereomeres (Fig. 2A), broadest across pereomere 3, gradually tapering anteriorly and posteriorly; pereomere 1 with convex posterior margin corresponding with posterior margin of head; pereomeres 2–4 straight, ...