Pertsovius heterodentatus Andronov & Kosobokova, 2011, n. gen.

• Main Authors: Andronov, Vladimir N., Kosobokova, Ksenia N.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Maxillopoda; Calanoida; Discoidae; Pertsovius; Pertsovius heterodentatus; Bor; Canada; Seta; Arctic; canada basin
• Online Access: https://zenodo.org/record/6182136; https://doi.org/10.5281/zenodo.6182136

Pertsovius heterodentatus n. gen. et sp. nov. (Figures 5–6) Material examined. Holotype: adult female, dissected, body length 0.70 mm. ZIN accession number 91098. Collected during the USCGC “ Healy ” Ocean Exploration-05/ 2 cruise, station 5, Canada Basin (73 ° 24 ’N, 153 ° 33 ’W), 5 July 2005, bottom depth 3850 m, depth of collection 3000 – 2000 m. Paratype: adult female, dissected, body length 0.70 mm. ZIN accession number 91099. Collected during the USCGC “ Healy ” Ocean Exploration-05/ 2 cruise, station 5, Canada Basin (73 ° 24 ’N, 153 ° 33 ’W), 5 July 2005, bottom depth 3850 m, depth of collection 2000 – 1000 m. Species description. Prosome ovoid in dorsal view (Fig. 5: 1), nearly three times as long as urosome and 1.9 times as long as wide. The first pediger partly separate from cephalosome (Fig. 5: 2), while fourth and fifth pedigers fused. Genital complex slightly asymmetrical (Fig. 5: 3) with lateral borders strongly convex, and large spermathecae obvious. Genital double somite approximately equal in length to subsequent two somites combined: anterior part strongly protruding ventrally forming a thick wide fold covering middle part of double somite (Fig. 5: 5). Anal somite nearly twice as long as preceding somite. Antennule of 24 free segments, reaching about to posterior border of caudal rami (Fig. 5: 2). Mouthparts as in P. tridentatus. No substantial differences from appendages of other species in the genus noted, except for maxilliped syncoxa lobe one having one seta (Fig. 5: 5, 6). Р 1 -Р 4 (Fig. 6: 1–5) of typical structure for genus: endopods one-segmented, exopods three-segmented. Outer distal spine on first segment of P 1 exopod long, almost reaching middle of outer border of third segment. Outer distal spine of first exopodal segment of Р 2 extending beyond distal end of second segment. Outer bor- der edge of third exopodal segment of left Р 2 armed with three spines, but right Р 2 with only two spines, both in holotype (Fig. 6: 2) and in paratype (Fig. 6: 3). Differential diagnosis. The ...