Watlingia cassis Gerken, 2010

Watlingia cassis Gerken, 2010: 296–301, figs 1–4.

Type material. Holotype: NIWA 45709, subadult female . Paratypes: NIWA 45710, subadult female; NIWA 45711, subadult male; NIWA 45712, subadult male. Chatham Rise, 43.53– 43.536°S, 178.505– 178.512°E.

Other material. 4 juveniles, NIWA 45713, 43.53 – 43.536 °, 178.505–178.512°, 346 m, 24 April 2007 . 1 subadult female, NIWA 45714, 42.996 – 42.991 °S, 178.996– 179.005°E, 520–530 m, 24 April 2007 . 5 individuals, NIWA 70509, 43.521 – 43.523 °S, 178.620– 178.632°W, 424–425 m, 18 April 2007 . 3 individuals, NIWA 70510, 39.637 – 39.646 °S, 172.153– 172.152°E, 264–266 m, 7 June 2007 .

Diagnosis. Carapace smooth, telson with 3 pairs of lateral setae.

Depth. 264–530 m.

Distribution. Chatham Rise, New Zealand, 42– 43°S, 178°E.

Remarks. Watlingia cassis and W. chathamensis are very similar, but can be distinguished by carapace morphology, number of telson lateral setae and size. In W. cassis the carapace is without tubercles, while in W. chathamensis the carapace has 1–3 pairs of large tubercles and a pair of posterior dorsal swellings. In W. cassis the telson bears three pairs of lateral setae; in W. chathamensis the telson bears 4–5 pairs of lateral setae. Watlingia cassis is on the order of 3.5 mm or less when mature, while W. chathamensis is more than 4.5 mm when mature.