Campylaspis pisum Vassilenko & Tzareva, 2004, sp. nov.
Creators: name: Vassilenko, Stella
name: Tzareva, Ludmila
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Cumacea
Nannastacidae
Campylaspis
Campylaspis pisum

description: Campylaspis pisum sp. nov.
(Figs. 7–8)
Material examined: holotype, adult female of 3.1 mm length, kept in the collection of Zoological Institute, (ZIN ­ 1/88376), R/V “Vityaz”, 52nd cruise, sta. 6660; Sea of Japan, 32º40´9´´N, 135º16´8´´E, depth 865–950 m, substrate: thick gray clay silt. “SIGSBY” trawl.
Paratypes: (ZIN ­ 2/88377), 1 females of 2.7 mm length (Fig.7, C), 1 male of 3.2 mm length, same locality.
Diagnosis: Pseudorostum with anterior edge truncated. Ocular area widely oval. Carapace sculpture fine­granulated. Carapace with near parallel margins in dorsal view. Lateral sides of carapace traversed with three pairs of oblique lateral bulging ridges; anterior (1st) and middle (2nd) pairs of ridges connected by transversal ridge in anterior half of carapace; anterior ridges also connected by transversal wide ridge, immediately posterior to ocular area.
Description of the holotype: Female (Fig. 7, A, B). Pseudorostrum short, its anterior edge truncated, dorsal part of pseudorostrum slightly upturned upwards. Sub­rostral notch flat, antero­lateral angles slightly pronounced. Ocular area widely oval, bulging. Carapace sculpture fine­granulated. Carapace with near parallel margins in dorsal view. Lateral sides of carapace traversed with 3 pairs of oblique lateral bulging ridges; anterior (1st) and middle (2nd) pairs of ridges connected by transversal ridge in anterior half of carapace; anterior ridges also connected by transversal wide ridge, immediately posterior to ocular area; the 3rd pair of ridges fringes posterior and postero­lower carapace margins. Lateral sides of carapace recessed between ridges. Thoracic segments II–VI with lateral wing­shaped projections. Abdominal section shorter than cephalothorax. First three abdominal segments with delayed lateral sharp angles. Sixth abdominal segment with equal length and width.
Maxilliped III (Fig. 8, A) with wide basis; ischium with denticle on inner angle; merus and propodus denticulate on inner margin; carpus with three stout denticles on outer margin; dactylus very small and thin.
Pereopod I (Fig. 8, B) with wide basis, length almost equal to length of ischium­propodus combined, all articles with plumose setae, merus and carpus bearing several denticles along anterior and posterior borders; dactylus very narrow, slightly shorter than propodus. Pereopod II (Fig. 8, C) with a short and broad basal article; dactylus elongated, length equal to length of three preceding articles combined.
Uropods (Fig. 7, D) slightly shorter than last three abdominal segments combined; peduncle length exceeding its width more than 4 times; inner peduncle margin crenulated. Endopodite much less than half length of peduncle, along inner margin in distal half bearing three short lateral setae and to terminal of different lengths; exopodite slightly shorter than endopodite, with two apical setae of different length on terminal article.
Remarks. The new species is most similar to Campylaspis costata, and differs by truncated pseudorostrum, larger, rounded and bulging ocular area; by the presence of the transversal ridge, located behind the ocular area, by more developed wing­shaped projections on thoracic segments in comparison with C. costata Sars, 1864.
description: Published as part of Vassilenko, Stella & Tzareva, Ludmila, 2004, New Cumacea species (Malacostraca, Peracarida) from the deepwater area of the Sea of Japan (Collections of the 52 Cruise by the R / V « Vityaz », 1972), pp. 1-16 in Zootaxa 702 on pages 13-16, DOI: 10.5281/zenodo.158429