Crocydocinus decipata ( Williams & Eldredge, 1994 ), 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: 29-30

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Crocydocinus decipata ( Williams & Eldredge, 1994 )

comb. nov.

Crocydocinus decipata ( Williams & Eldredge, 1994)   comb. nov.

( Figs. 13D View FIGURE 13 , 15D View FIGURE 15 , 17D View FIGURE 17 , 19 View FIGURE 19 A–D)

Rochinia decipata Williams & Eldredge, 1994: 1–4   , figs. 1, 2 (type locality: Cabras Island, Guam).

Rochinia   decipata— Ng & Richer de Forges 2007: 62 View Cited Treatment (list).— Ng et al. 2008: 105 (list).

Material examined. Holotype: male (14.2 × 9.1 mm) ( USNM 251434 View Materials ), Cabras Island , Guam, coll. MJ Wilder, 14 May 1975.  

Diagnosis. Carapace pyriform, covered with layer of setae and long tufts of setae on edge of gastric region and lateral margins of carapace; smooth when denuded. Pseudorostral spines straight, diverging in V. Supraorbital eave fuse to carapace, pre-orbital angle blunt. Postorbital lobe flattened on side, protecting eye. Hepatic spine prominent, swollen basally. Margin between postorbital lobe and hepatic spine forms slight U-shaped concavity ( Fig. 13D View FIGURE 13 ). Carapace with regions well defined; gastric region, epibranchial region and cardiac region swollen; epibranchial region with slight angle on lateral edge; intestinal region with granule ( Fig. 13D View FIGURE 13 ). Antennal flagellum longer than pseudorostral spines. Basal antennal article fused with carapace, longer than broad, large, plate-like with relatively blunt distal angle. Buccal frame covered by third maxilliped. Pterygostomial region with raised, plate-like lobe on outer margin ( Fig. 15D View FIGURE 15 ). Chelipeds inflated, propodus carinate; carpus, merus and propodus covered with setae; carpus with swellings, margins carinate; merus triangular in cross section. Ambulatory legs covered with setae except at tip of dactylus, slender; granule present on distal tip of merus. Male thoracic sternum flat, slightly depressed anteriorly; sternites 3 and 4 margin slightly constricted, surface concave slightly ( Fig. 15D View FIGURE 15 ). Male pleon triangular, all somites and telson free ( Fig. 15D View FIGURE 15 ). G1 straight with distal tip composed of 2 lobes ( Fig. 19 View FIGURE 19 A–D).

Remarks. Little is known of Crocydocinus decipata   comb. nov., with only the male holotype known. Crocydocinus decipata   comb. nov. was identified as most similar to R. suluensis Griffin & Tranter, 1986   , and R. moluccensis Griffin & Tranter, 1986   , but differs in the morphology of the postorbital lobe, cheliped and G1. As discussed earlier, although the G1 structure is similar to species of Tunepugettia   , the tip being bilobed ( Fig. 19 View FIGURE 19 A–D), but C. decipata   comb. nov. lacks distinct lateral spines that are present in the other species in this genus, and the short, straight and cylindrical pseudorostral spines, straight outer margin of the basal antennal article, and the absence of carina on the ambulatory legs indicate that it should be referred to Crocydocinus   n. gen. instead. Crocydocinus decipata   comb. nov. is only known from its type locality, Cabras Island, Guam.














Crocydocinus decipata ( Williams & Eldredge, 1994 )

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


Ng, P. K. L. & Guinot, D. & Davie, P. J. F. 2008: 105
Ng, P. K. L. & Richer de Forges, B. 2007: 62