Cymonomus aequilonius Dell, 1971

Ahyong, Shane T., 2008, Deepwater crabs from seamounts and chemosynthetic habitats off eastern New Zealand (Crustacea: Decapoda: Brachyura), Zootaxa 1708 (1), pp. 1-72 : 12-13

Cymonomus aequilonius Dell, 1971

( Fig. 1F )

Cymonomus aequilonius Dell, 1971: 59–61 , figs 11–15 [type locality: NE of Mayor Island, Bay of Plenty, New Zealand, 37°10’S, 176°23.5’E, 731 m]. — McLay 1988: 92, fig. 17. — Ahyong & Brown 2003: 1372.

Material examined. Tims Bank, S of Ritchie Hill : NIWA 34966 , 1 male (cl 5.9 mm, cw 4.8 mm), 1 female (cl 7.7 mm, cw 6.7 mm), 40°01.29–01.20’S, 178°04.15–04.09’E, 797–804 m, KAH9907/01, 1 Jun 1999 .

Mernoo Bank, Chatham Rise: NIWA 16829 , 1 ovigerous female (cl 8.9 mm, cw 8. 2 mm), 44°20.0’S, 173°54.2’E, 675 m, S0161, 28 Oct 1979 .

Remarks. The three specimens reported here represent the first records of C. aequilonius since it was first described, extending the known range south to the Chatham Rise. Among the three species of Cymonomus known from New Zealand, C. aequilonius is distinctive in its rostral length — longer than rather than distinctly shorter than the eyestalks.

Distribution. Eastern New Zealand: Bay of Plenty south to the Chatham Rise; 675– 804 m.

Figures

FIGURE 1. A, Dagnaudus petterdi (Grant, 1905), female, pcl 44.1 mm (NIWA 34784). B, Homolodromia kai Guinot, 1995, female, cl 19.9 mm, cw 14.6 mm (NIWA 6761). C, Dicranodromia spinulata Guinot, 1995, male, cl 9.6 mm, cw 6.8 mm (NIWA 34933). D, Cymonomus clarki sp. nov., ovigerous female holotype, cl 6.9 mm, cw 6.6 mm (NIWA 29666). E, Lyreidus tridentatus De Haan, 1841, female, cl 46.6 mm (NIWA 6723). F, Cymonomus aequilonius Dell, 1971, female, cl 7.7 mm, cw 6.7 mm (NIWA 34966).