Diastylopsis crassior Calman, 1911

Gerken, Sarah, 2015, New Zealand Diastylidae and Gynodiastylidae (Crustacea: Cumacea), Zootaxa 4031 (1), pp. 1-77 : 53

Diastylopsis crassior Calman, 1911

Diastylopsis crassior Calman, 1911: 381 , pl. XXXVI, Figs. 13–18 .— Stebbing, 1913: 112.— Zimmer, 1913: 479.— Jones, 1963: 61, Figs. 237–250.— Gerken, 2014: 19 –20.

Material examined. None.

Diagnosis. Female and subadult male. Carapace without ridges, ventral margin strongly serrrate. Eyelobe without lenses. Pereonites 3–4 not fused. Pereopods 3–4 with rudimentary exopods in female. Telson 0.5 times length of uropod peduncles, with 6–7 pairs lateral setae, 2 terminal setae.

Adult male. Pereonite 5 very acutely produced posteriorly. Pleonite 1 with ventral spines. Pereopod 4 ischium produced as posteriorly directed lobe.

Remarks. The most similar species in New Zealand waters is Diastylopsis elongata , in which the telson is more than 0.5 times the uropod peduncle length, while in D. crassior the telson is 0.5 times the uropod peduncle length.

Figures

FIGURE 13. Diastylis dasys n. sp. paratype ovigerous female (NIWA 093212). A, pereopod 1; B, pereopod 2; C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pleonite 6, telson and uropods.

FIGURE 14. Diastylis enodis n. sp. holotype subadult female (NIWA 093200). A, dorsal view. Paratype preparatory female (NIWA 093180). B, side view; C, antennule and antenna; D, mandible; E, maxillule; F, maxilla; G, maxilliped 1; H, maxilliped 2; I, maxilliped 3.

FIGURE 15. Diastylis enodis n. sp. paratype preparatory female (NIWA 093180). A, pereopod 1; B, pereopod 2; C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pleonite 6, telson and uropods.

FIGURE 16. Diastylis homoacanthus n. sp. holotype subadult female (NIWA 093177). A, side view. Paratype subadult male (NIWA 093185). B, dorsal view; C, antennule; D, maxillule; E, maxilla; F, maxilliped 1; G, maxilliped 2; H, maxilliped 3.

FIGURE 17. Diastylis homoacanthus n. sp. paratype subadult male (NIWA 093185). A, pereopods 1; B, pereopod 2, C, pereopod 3; D, pereopod 4. Holotype subadult female (NIWA 093177). E, pleonite 6, telson and uropods.

FIGURE 18. Diastylis implanus n. sp. holotype adult male (NIWA 093194). A, side view. Paratype adult male (NIWA 094877). B, dorsal view. Paratype ovigerous female (NIWA 093211). C, side view; D, dorsal view.