Diastylopsis thilenuisi ( Zimmer, 1902 )

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

Diastylopsis thilenuisi ( Zimmer, 1902)

Leptostylis thilenuisi Zimmer, 1902: 449 –455, Figs. G–W; 1903: 685.

Leptostylis sp.— Calman, 1908: 239.— Stebbing, 1913: 114.

Diastylopsis thilenuisi . — Zimmer,1908: 183, 190.— Stebbing, 1913: 113 –114.— Zimmer, 1913: 479; 1941: 55, fig. 89; 1943: 136–139, Figs. 4-8 .— Jones, 1963: 61 –64, Figs. 14 , 61–64.— Gerken, 2014: 19 –20.

Material examined. None.

Diagnosis. Female and subadult male. Carapace with incomplete ridges only on anterior half, anterolateral corner acutely produced. Eyelobe without lenses. Pereonites 3–4 not fused, pereonite 4 very narrow dorsally. Pereopods 3–4 with rudimentary exopods in female. Telson extending about to end of uropod peduncle, with 6 pairs lateral setae, 2 terminal setae.

Adult male. Carapace ridges less pronounced than in female. Telson slightly shorter than uropod peduncles, with 7–8 pairs lateral setae and 2 terminal setae.

Remarks. In the New Zealand fauna, the carapace of Diastylopsis thilenuisi is unique in not being entirely unornamented, as in D. crassior and D. elongata , but also without two parallel oblique ridges as in D. aspratilis and D. bicarina .

Figures

FIGURE 4. Colurostylis whitireia n. sp. paratype adult male (NIWA 094662). A, antennule; B, antennule flagellae; C, antenna peduncle; D, antenna; E, maxilliped 3; F, pereopod 1.

FIGURE 5. Colurostylis whitireia n. sp. paratype adult male (NIWA 094662). A, pereopod 2; B, pereopod 3; C, pereopod 4; D, pereopod 5; E, pleopod 1; F, pleopod 2; G, pleonite 6, telson and uropods.

FIGURE 6. Diastylis acanthoelachys n. sp. holotype ovigerous female (NIWA 093174). A, side view. Paratype preparatory female (NIWA 093201). B, side view; C, antennule; D, mandibles; E, maxillule; F, maxilla; G, maxilliped 1; H, maxilliped 2; I, maxilliped 3.

FIGURE 7. Diastylis acanthoelachys n. sp. paratype preparatory female (NIWA 093201). A, pereopod 1; B, pereopod 2; C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pleonite 6, telson and uropods.

FIGURE 8. Diastylis adaioacanthus n. sp. holotype subadult female (NIWA 093195). A, side view. Paratype subadult female (NIWA 093182). B, dorsal view; C, antennule; D, mandible; E, maxilla; F, maxilliped 1; G, maxilliped 2.

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.