Chaceon yaldwyni Manning, Dawson & Webber, 1990

Ahyong, Shane T., 2008, Deepwater crabs from seamounts and chemosynthetic habitats off eastern New Zealand (Crustacea: Decapoda: Brachyura), Zootaxa 1708 (1), pp. 1-72 : 31-33

Chaceon yaldwyni Manning, Dawson & Webber, 1990

( Figs 17E , 28E )

Chaceon sp. — Takeda in Amaoka et al. 1990: 376.

Chaceon yaldwyni Manning, Dawson & Webber, 1990: 602–606 , figs 1–3 [type locality: NE of Chatham Islands, 43°40.4–26.6’S, 174°09.6–05.5’W]. — Ng & Manning 1998: 396 [key].

Material examined. Otara Seamount: NIWA 6716 , 1 male (cl 55.2 mm, cw 71.3 mm), 36°55.81–57.09’S, 177°20.09–19.90’E, 1323–1346 m, TAN0413/41, 10 Nov 2004 .

Remarks. The specimen is the smallest of the species recorded to date, with smallest previous record being the cl 72 mm, cw 92 mm female paratype. The P5 meral and propodal proportions are similar to those reported for the type material ( Manning et al. 1990): merus length/height 5.06 (versus 5.11–5.25), propodus length/height 5.35 (versus 4.9).

Distribution. Eastern New Zealand, from the Chatham Rise, Louisville Ridge and Otara Seamount, Bay of Plenty; 962–1346 m.

Figures

FIGURE 17. A–B, Bellidilia cheesmani (Filhol, 1886): A, male, cl 9.3 mm (NIWA 6758); B, ovigerous female, cl 8.8 mm, NIWA 6755. C–D, Ebalia tuberculosa (A. Milne-Edwards, 1873): C, male, cl 9.5 mm (NIWA 6752); D, female, cl 8.5 mm (NIWA 6752). E, Chaceon yaldwyni Manning, Dawson & Webber, 1990, male, cl 55.2 mm (NIWA 6716).

FIGURE 28. A–B, Ethusina castro sp. nov., ovigerous female holotype, cl 14.1 mm (NIWA 6067), dorsal and ventral views. C, Trichopeltarion fantasticum Richardson & Dell, 1964, female, cl 53.1 mm (NIWA 6754). D, Trichopeltarion janetae sp. nov., male, cl 27.9 mm (NIWA 29650). E, Chaceon yaldwyni Manning, Dawson & Webber, 1990, 1 male, cl 55.2 mm (NIWA 6716). F, Lyreidus tridentatus De Haan, 1841, male, cl 38.5 mm (NIWA 6720). Photo credits: R. Stewart (A–C, E–F), C. Marriot (D).