Diastylopsis crassior Calman, 1911

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

publication ID	https://doi.org/10.11646/zootaxa.4031.1.1
publication LSID	lsid:zoobank.org:pub:19E72EB1-B55C-40C0-AD11-23BA6E97D438
DOI	https://doi.org/10.5281/zenodo.6122562
persistent identifier	https://treatment.plazi.org/id/C70EEC59-6E11-FFF6-FF24-1C35FF4C7F08
treatment provided by	Plazi (2016-04-22 01:27:38, last updated 2024-11-26 01:39:09)
scientific name	Diastylopsis crassior Calman, 1911
status

Treatment

Diastylopsis crassior Calman, 1911 View in CoL

Diastylopsis crassior Calman, 1911: 381 View in CoL , pl. XXXVI, Figs. 13–18 View FIGURE 13 View FIGURE 14 View FIGURE 15 View FIGURE 16 View FIGURE 17 View FIGURE 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.

References

Calman, W. T. (1911) On new and rare Crustacea of the order Cumacea from the collection of the Copenhagen Museum - Part II. The families Nannastacidae and Diastylidae. Transactions of the Royal Society of London, 18, 341 - 400.

Gerken, S. (2014) Eleven new species and a new genus of Diastylidae Crustacea: Cumacea) from Australia and one new species from Canada. Records of the Australian Museum, 66 (1), 1 - 62. http: // dx. doi. org / 10.3853 / j. 2201 - 4349.66.2014.1601

Jones, N. S. (1963) The marine fauna of New Zealand: Crustaceans of the Order Cumacea. Memoirs of the New Zealand Oceanographic Institute, 23, 1 - 80.

Stebbing, T. R. R. (1913) Cumacea. Das Tierreich, 39, 1 - 210.

Zimmer, C. (1913) Die Cumaceen der Deutschen Sudpolar-Expedition 1901 - 1903. Deutsche Sudpolar-Expedition 1901 - 1903, 14 (3), 15 - 26.

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.