Cyrtomaia cornuta Richer de Forges & Guinot, 1988

Ahyong, Shane T., 2008, Deepwater crabs from seamounts and chemosynthetic habitats off eastern New Zealand (Crustacea: Decapoda: Brachyura), Zootaxa 1708 (1), pp. 1-72 : 35

publication ID	https://doi.org/10.11646/zootaxa.1708.1.1
DOI	https://doi.org/10.5281/zenodo.5107388
persistent identifier	https://treatment.plazi.org/id/474587CB-AF7F-FFF9-8DE3-FC46FE90F8EE
treatment provided by	Felipe (2021-07-15 19:59:08, last updated by Plazi 2023-11-03 11:21:25)
scientific name	Cyrtomaia cornuta Richer de Forges & Guinot, 1988
status

Treatment

Cyrtomaia cornuta Richer de Forges & Guinot, 1988 View in CoL

( Fig. 16A View FIGURE 16 )

Cyrtomaia cornuta Richer de Forges & Guinot, 1988: 44 View in CoL , fig. 3A–C, pl. 2a–e [type locality: Northern Norfolk Ridge, S of New Caledonia]. — Webber & Richer de Forges 1995: 509–510. — Richer de Forges & Ng 2007: 62, 65–67, fig. 5A, C.

Material examined. Main Cavalli Seamount: NIWA 14182 View Materials , 1 male (cl 46.9 mm), 34°04.32–04.74’S, 174°04.08–04.75’E, 630– 560 m, KAH0204/21, 16 Apr 2002 .

Off Coromandel Peninsula: NIWA 14189 View Materials , 1 View Materials ovigerous female (cl 53.9 mm), 37°00.64’S – 36°57.67’S, 176°16.38–17.07’E, 410 m, KAH9801/29, Z9013, 23 Jan 1998 ; NIWA 14194 View Materials , 1 View Materials ovigerous female (cl 53.8 mm), 36°28.72–26.74’S, 176°13.36–12.97’E, 526– 510 m, KAH0001/61, Z10010 View Materials , 17 Feb 2000 .

Off Great Barrier Island: NIWA 14188 View Materials , 1 male (cl 46.8 mm), 36°00.88–02.89’S, 176°15.13–15.27’E, 482– 474 m, KAH0001/64, Z10013 View Materials , 18 Feb 2000 .

Builders Pencil cold seep: NIWA 29389 View Materials , 1 View Materials damaged male, 39°32.59–32.65’S, 178°20.19–19.62’E, 815– 819 m, TAN0616/38, 6 Nov 2006 .

Remarks. The specimens agree well in most respects with the type description and additional data provided by Richer de Forges & Ng (2007). Two males (NIWA 14182, 29389), however, have smooth, rather than finely granular P5 meri as reported by Richer de Forges & Webber (1995) for specimens from northern New Zealand. Cyrtomaia cornuta is readily distinguished from C. lamellata Rathbun, 1906 , the only other congener known from New Zealand, by the long and slender, rather than minute rostral spines.

Distribution. New Caledonia and northern New Zealand; a first record of the species from a cold seep; 270– 819 m.

References

Ng, N. K., Davie, P. J. F., Schubart, C. D. & Ng, P. K. L. (2007) Xenograpsidae, a new family of grapsoid crabs (Crustacea: Brachyura) associated with shallow water hydrothermal vents. Raffles Bulletin of Zoology, Supplement 16, 223 - 256.

Rathbun, M. J. (1906) The Brachyura and Macrura of the Hawaiian Islands. Bulletin of the United States Fish Commis- sion, 23 (3), 827 - 930, pls 1 - 24.

Richer de Forges, B., & Guinot, D. (1988) Description de trios especes de Cyrtomaia Miers, 1886, de Nouvelle-Caledonie et des iles Chesterfield (Crustacea Decapoda Brachyura). Bulletin du Museum national d'Histoire naturelle, Paris, series 4, section A, Zoologie, 10 (1), 39 - 55.

Webber, W. R. & Richer de Forges, B. (1995) Deep sea Majidae (Decapoda: Brachyura) new to New Zealand with a description of Oxypleurodon wanganella sp. nov. Journal of the Royal Society of New Zealand, 25 (4), 501 - 516.

Figures

FIGURE 16. Carapace. A, Cyrtomaia cornuta Richer de Forges & Guinot, 1995, male, cl 46.9 mm (NIWA 14182), dorsal view. B–C, Dorhynchus ramusculus (Baker, 1906), male, cl 13.3 mm (NIWA 9941), right lateral and dorsal views. D, Platymaia maoria Dell, 1963, ovigerous female, cl 55.8 mm (NIWA 14191). E, Vitjazmaia latidactyla Zarenkov, 1994, ovigerous female, cl 72.0 mm (NIWA 16800).