Diastylis acuminata Jones, 1960

Gerken, Sarah, 2015, New Zealand Diastylidae and Gynodiastylidae (Crustacea: Cumacea), Zootaxa 4031 (1), pp. 1-77 : 18

Diastylis acuminata Jones, 1960

Diastylis acuminata Jones, 1960: 10 , Figs. 1–6 ; 1963: 57–58.

Material examined. None.

Diagnosis. Female and subadult male. Carapace, pereon and pleon covered in short spines, carapace elongate; ventral margin with few teeth anteriorly; antennal notch absent. Eyelobe without lenses. Pseudorostrum acute, 0.15 times carapace length anterior of eyelobe. Antennule article 2 longer than article 3. Maxilliped 3 ischium not produced. Pereopod 1 basis ischium merus together longer than carpus propodus dactylus together, dactylus longer than propodus, propodus longer than carpus. Pereopod 2 carpus 5 times propodus length. Pereopods 3–4 without exopods. Telson with 8 lateral setae, more than 0.5 times length of uropod peduncles.

Adult male. Unknown

Remarks. Diastylis acuminata is superficially similar to D. acanthoelachys and D. adaioacanthus . Diastylis adaioacanthus has a relatively longer, acute pseudorostrum and larger spines on the carapace, pereon and pleon than D. acuminata . Diastylis acanthoelachys has a longer pereopod 1, with the basis ischium merus together shorter than the carpus propodus and dactylus together.

Figures

FIGURE 1. Colurostylis whitireia n. sp. holotype ovigerous female (NIWA 094659). A, side view. Paratype subadult female (NIWA 094661). B, side view. Paratype adult male (NIWA 094662) C, side view; D, dorsal view.

FIGURE 2. Colurostylis whitireia n. sp. paratype subadult female (NIWA 094661). A, antennule; B, antenna; C, mandibles; D, maxillule; E, maxilla; F, maxilliped 1; G, maxilliped 2; H, maxilliped 3; I, pereopod 1; J, pereopod 2.

FIGURE 3. Colurostylis whitireia n. sp. paratype subadult female (NIWA 094661). A, pereopod 3; B, pereopod 4; C, pereopod 5; D, pleonite 6, telson and uropods.

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.