Calliapagurops de Saint Laurent, 1973

Ngoc-Ho, Nguyen, 2003, European and Mediterranean Thalassinidea (Crustacea, Decapoda), Zoosystema 25 (3), pp. 439-555 : 486-487

Genus Calliapagurops de Saint Laurent, 1973

TYPE SPECIES. — Calliapagurops charcoti de Saint Laurent, 1973 , by original designation.

DIAGNOSIS. — Carapace with faint dorsal oval, long rostral and anterolateral spines; linea thalassinica complete. Abdominal somite 2 longest, longer than somite 6; telson wider than long, with rounded outline and transverse dorsal crest bearing spiniform setae.

Eyestalks cylindrical, length three to four times diameter of terminal corneas. A1 peduncle reaching approximately middle of much heavier A2 peduncle; antennal scale small. Epipod of Mxp1 with elongated anterior lobe. Epipod of Mxp2 small. Mxp3 operculiform, three or more meral spines on distal margin; propodus widened proximally, dactylus digitiform; exopod absent.

P1 unequal in males, subequal in females with numerous spines on lower border of ischium and merus. P4 chelate, with fixed finger approximately as long as dactylus; P5 chelate. Paired arthrobranch on Mxp3 and P1-4.

Plp1 uniramous, Plp2 biramous with small terminal appendix interna in both sexes, no appendix masculina in male. Plp2-5 foliaceous and biramous with appendix interna embedded in margin of endopod in both sexes. Uropodal endopod elongate ovate, longer than telson.

REMARKS

The genus Calliapagurops was established in 1973 for a new species, Calliapagurops charcoti , which was briefly diagnosed. The holotype and only known specimen was a damaged specimen, with the abdomen and pereopods 4 and 5 missing. The species was redescribed and partly figured by Sakai (1999a: 8, fig. 1) who erected a new subfamily, Calliapaguropinae, for it. Recently, a new species, Calliapagurops foresti Ngoc-Ho, 2002, was described from the Philippines. The type material includes four specimens, three of them complete and in good condition. Their examination complements the diagnosis of the genus as given above. It also reveals that Calliapagurops is better placed in the subfamily Callichirinae sensu Tudge et al. (2000) . The latter, which was synonymised with the Callianassinae by Sakai (1999a), is regarded as a valid subfamily (Ngoc-Ho 2002).

Calliapagurops charcoti de Saint Laurent, 1973 ( Fig. 16 )

Calliapagurops charcoti de Saint Laurent, 1973: 515 . — Manning & Felder 1991: 771. — Sakai 1999a: 8, fig. 1. — Tudge et al. 2000: 141. —?* Lindley et al. 2001: 46. — ° Türkay 2001: 289. — Ngoc-Ho 2002: 540.

TYPE MATERIAL. — Holotype: from Azores, Jean Charcot, BIAÇORES, stn 109, 39°33’N, 31°17’W, 190-230 m, in shelly sand, 20.X.1971, cl. 9.5 mm without abdomen and P4, P5 (figured, MNHN Th 345).

DISTRIBUTION. — Only known from the type locality, at 190- 230 m.

DIAGNOSIS

As for the genus, with details added: eyestalk reaching base of last article of A1 and not narrowing distally ( Fig. 16A ). Md ( Fig. 16E ), Mx1 ( Fig. 16C ), Mx2 ( Fig. 16D ), Mxp1 ( Fig. 16B ), Mxp2 ( Fig. 16J ) as figured. Mxp3 ( Fig. 16K, L ) with three or four spines on distal margin of merus. P1 ( Fig. 16F, G ) ischium with six or seven lower spines, merus with four to six lower spines, major P1 with both fixed finger and dactylus bearing low triangular tooth near midpoint of cutting edge. P4, P5, abdomen, telson, uropods and branchial formula unknown.

Colour

Unknown.

Size

Holotype and only known specimen of cl. 9.5 mm.

REMARKS

Although the holotype of this species was referred to by both de Saint Laurent (1973) and Sakai (1999a) as a male, it is a female. Differences between C. charcoti and its congener C. foresti are given in Ngoc-Ho (2002).

Figures

FIG. 16. — Calliapagurops charcoti de Saint Laurent, 1973, holotype, from Azores (MNHN Th 345); A, anterior part of carapace; B, maxilliped 1; C, D, maxillule and maxilla; E, mandible; F, G, major and minor pereopod 1; H, I, pereopod 2 and 3; J, maxilliped 2; K, L, maxilliped 3 and mesial view of ischium. Scale bars: A, F-I, K, L, 1 mm; B-E, J, 0.5 mm.