Crocydocinus panglao, 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 : 30

Crocydocinus panglao n. sp.

( Figs. 14A , 16A , 17E )

Material examined. Holotype: ovigerous female (32.4 × 22.6 mm) ( NMCR 50091 ), stn CP2388, off Balicasag Island , Bohol Sea, Philippines, 9°26.9’N, 123°34.5’E, 762–786 m, coll. PANGLAO 2005 Expedition, 30 May 2005.

Diagnosis. Carapace pyriform, covered with a layer of setae, smooth when denuded. Pseudorostral spines straight, short, diverging in V ( Fig. 14A ). Supraorbital eave fused to carapace; pre-orbital lobe directed upwards; postorbital lobe cup-like, fused to swollen base of hepatic spine. Carapace with regions defined, with granules on each region; 2 hepatic spines with swollen base; gastric region slightly swollen with 2 small protogastric granules, 1 large mesogastric granule above 1 small mesogastric granule, and 1 large rounded metagastric granule; epibranchial region with 1 large rounded granule, top of granule with small tubercle; 1 large rounded cardiac granule; 2 lateral branchial spines swollen at base; 1 posterior granule medially ( Fig. 14A ); granule along lateral margin of carapace along branchial region ( Fig. 17E ). Antennal flagellum slightly longer than pseudorostral spines. Basal antennal article longer than broad, distal angle blunt. Buccal frame covered by third maxilliped, distal angle slightly protruded. Pterygostomial region with 4 granules on outer margin ( Fig. 16A ). Cheliped slender, covered with thick layer of setae except on fingers; propodus slightly carinate on margin. Ambulatory legs slender covered with thick layer of setae except on dactylus.

Etymology. The species is named after the PANGLAO 2005 Expedition, through which the type specimen was collected. The name is used as a noun in apposition.

Remarks. Crocydocinus panglao n. sp. is most similar in morphology to C. porg n. sp. However, C. panglao n. sp. differs from C. porg n. sp. in having a lack of a urogastric granule ( Fig. 14A ) (versus having an oval urogastric granule on C. porg n. sp.; Fig. 14B ); single granule along the lateral margin of the carapace ( Fig. 17E ) (versus having three granules along the lateral margin of the carapace on C. porg n. sp.; Fig 17F ); and the pterygostomial region with four granules on the outer margin ( Fig. 16A ) (versus the pterygostomial region with three granules on outer margin on C. porg n. sp.; Fig. 16B ). No males of C. panglao n. sp. were collected, so the male thoracic sternum, pleon and G1 morphology are unknown. Crocydocinus panglao n. sp. is currently only known from its type locality, Philippines.

Figures

FIGURE 14. Overall dorsal view. A, Crocydocinus panglao n. sp., holotype, ovigerous female (32.4 × 22.6 mm) (NMCR 50091), Philippines; B, C. porg n. sp., holotype, female (28.5 × 19.3 mm) (MNHN-IU-2013-3042), Papua New Guinea; C, C. vanuatu n. sp., holotype, male (16.0 × 11.0 mm) (ZRC 2011.1047), Vanuatu.

FIGURE 16. Overall ventral view. A, Crocydocinus panglao n. sp., holotype, ovigerous female (32.4 × 22.6 mm) (NMCR 50091), Philippines; B, C. porg n. sp., holotype, female (28.5 × 19.3 mm) (MNHN-IU-2013-3042), Papua New Guinea; C, C. vanuatu n. sp., holotype, male (16.0 × 11.0 mm) (ZRC 2011.1047), Vanuatu.

FIGURE 17. Lateral view of carapace.A, Crocydocinus ewok n. sp., holotype, male (22.5 × 15.0 mm) (MNHN-IU-2011-2328), Papua New Guinea; B, C. brevirostris (Doflein, 1904) comb. nov., holotype, female (22.4 × 15.5 mm) (ZMB 13647), Sumatra; C, C. crosnieri (Griffin & Tranter, 1986) comb. nov., holotype, female (20.1 × 13.9 mm) (MNHN-B16073), Ile de la Réunion; D, C. decipata (Williams & Eldredge, 1994) comb. nov., holotype, male (14.2 × 9.1 mm) (USNM251434), Guam; E, C. panglao n. sp., holotype, ovigerous female (32.4 × 22.6 mm) (NMCR 50091), Philippines; F, C. porg n. sp., holotype, female (28.5 × 19.3 mm) (MNHN-IU-2013-3042), Papua New Guinea; G, C. vanuatu n. sp., holotype, male (16.0 × 11.0 mm) (ZRC 2011.1047), Vanuatu.