Crocydocinus vanuatu, Lee & Forges & Ng, 2019

Lee, Bee Yan, Forges, Bertrand Richer De & Ng, Peter K. L., 2019, Deep-sea spider crabs of the family Epialtidae MacLeay, 1838, from Papua New Guinea, with a redefinition of Tunepugettia Ng, Komai & Sato, 2017, and descriptions of two new genera (Crustacea: Decapoda: Brachyura: Majoidea), Zootaxa 4619 (1), pp. 1-44: 33-34

publication ID

https://doi.org/10.11646/zootaxa.4619.1.1

publication LSID

lsid:zoobank.org:pub:CA6AEB18-2F97-449C-AE34-E1509DFFC841

persistent identifier

http://treatment.plazi.org/id/03C9AC69-1E4E-FF8B-649F-FA47B62FEE0D

treatment provided by

Plazi

scientific name

Crocydocinus vanuatu
status

n. sp.

Crocydocinus vanuatu   n. sp.

( Figs. 14C View FIGURE 14 , 16C View FIGURE 16 , 17G View FIGURE 17 , 19 View FIGURE 19 E–H)

Rochinia aff. brevirostris — Richer de Forges & Ng 2013: 473   , fig. 4A [not Hyastenus brevirostris Doflein, 1904   ].

Material examined. Holotype: male (16.0 × 11.0 mm) ( ZRC 2011.1047 View Materials ), stn AT89, Big Bay , Espiritu Santo Island, Vanuatu, 630– 583 m, coll. SANTO 2006 Expedition, 13 October 2006.  

Diagnosis. Carapace pyriform, covered with thick layer of setae, surface smooth when denuded ( Fig. 14C View FIGURE 14 ). Pseudorostral spines straight, thick, short, diverging, V-shaped. Supraorbital eave fused to carapace; pre-orbital angle blunt; postorbital lobe cup-like, fused with hepatic spine, base swollen. Carapace with regions defined; gastric region swollen; epibranchial region slight swell; posterior region with small granule medially ( Fig. 14C View FIGURE 14 ); 3 granules along lateral margin of carapace on margin of branchial region ( Fig. 17G View FIGURE 17 ). Antennal flagellum slightly longer than pseudorostral spines. Basal antennal article longer than broad, distal angle rounded. Buccal frame covered by third maxilliped. Pterygostomial region with 3 granules on outer margin ( Fig. 16C View FIGURE 16 ). Chelipeds slender, covered with setae except on fingers. Ambulatory legs slender, covered with layer of setae except on dactylus; P2 longest. Male tho- racic sternum depressed anteriorly; sternites 3 and 4 with concave surface, margin constricted with curved margin ( Fig. 16C View FIGURE 16 ). Male pleon broad triangular ( Fig. 16C View FIGURE 16 ). G1 straight, with distal tip sharp ( Fig. 19 View FIGURE 19 E–H).

Etymology. The species is named after the country from which the specimen was collected from. The name is used as a noun in apposition.

Remarks. Crocydocinus vanuatu   n. sp. was identified as R. aff. brevirostris   by Richer de Forges & Ng (2013) but they noted it differed from the Bay of Bengal specimen as illustrated by Griffin & Tranter (1986: fig. 57c) in several aspects. Comparison of the present material with the type specimen of C. brevirostris ( Doflein, 1904)   comb. nov. ( Figs. 13B View FIGURE 13 , 15B View FIGURE 15 , 17B View FIGURE 17 ), revealed more differences, justifying treating them as two separate species. Crocydocinus vanuatu   n. sp. lacks all the distinct large granules ( Fig. 14C View FIGURE 14 ) seen in C. brevirostris   comb. nov. ( Fig. 13B View FIGURE 13 ); has only weak lateral branchial spines ( Fig. 14C View FIGURE 14 ) (versus distinct lateral branchial spines in C. brevirostris   comb. nov.; Fig. 13B View FIGURE 13 ); and the basal antennal article has a straight outer margin ( Fig. 16C View FIGURE 16 ) (versus basal antennal article with slightly convex outer margin in C. brevirostris   comb. nov.; Fig. 15B View FIGURE 15 ). Crocydocinus vanuatu   n. sp. is only known from its type locality in Vanuatu.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Epialtidae

Genus

Crocydocinus

Loc

Crocydocinus vanuatu

Lee, Bee Yan, Forges, Bertrand Richer De & Ng, Peter K. L. 2019
2019
Loc

Rochinia aff. brevirostris —

Richer de Forges, B. & Ng, P. K. L. 2013: 473
2013