Diastylopsis elongata Calman, 1911

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

Diastylopsis elongata Calman, 1911

Diastylopsis elongata Calman, 1911: 379 –380, pl. XXXVII, Figs. 1–12 .— Zimmer, 1913: 479.— Stebbing, 1913: 111 –112.— Zimmer, 1930: 652–653.— Jones, 1963: 59 –60, Figs. 225–236; 1969: 163.— Gerken, 2014: 19 –20.

Material examined. None.

Diagnosis. Female and subadult male. Carapace smooth, anterolateral corner serrate. Eyelobe without lenses. Pereonites 3–4 not fused, pereonite 4 narrow dorsally. Pereopods 3–4 with rudimentary exopods in female. Telson extending more than 0.5 times length of uropod peduncles, with 6 pairs lateral setae and 2 terminal setae.

Adult male. Pereonite 5 produced posteriorly moderately, ventrally directed. Pleonite 1 with large ventral spine. Pereopod 4 ischium produced as posteriorly directed lobe. Telson extending more than 0.5 times uropod peduncle length, with 8 pairs lateral setae and 2 terminal setae.

Remarks. Diastylopsis elongata and D. crassior are quite similar, as noted by Jones (1963). The most obvious difference is in the telson , with the telson no more than 0.5 times the uropod peduncle length in D. crassior and distinctly longer than 0.5 times the peduncle length in D. elongata .

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.

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 9. Diastylis adaioacanthus n. sp. paratype subadult female (NIWA 093182). A, maxilliped 3; B, pereopod 1; C, pereopod 2; D, pereopod 3; E, pereopod 4; F, pereopod 5; G, pleonite 6, telson and uropods.

FIGURE 11. Diastylis curtain n. sp. paratype subadult female (NIWA 093192). A, pereopod 1; B, pereopod 2; C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pleonite 6, telson and uropods.

FIGURE 12. Diastylis dasys n. sp. holotype ovigerous female (NIWA 093208). A, side view. Paratype ovigerous female (NIWA 093212). B, dorsal view; C, antennule and antenna; D, mandibles; E maxillules; F, maxilla; G, maxilliped 1; H, maxilliped 2; I, maxilliped 3.