Diastylis insularum ( Calman, 1908 )

Gerken, Sarah, 2015, New Zealand Diastylidae and Gynodiastylidae (Crustacea: Cumacea), Zootaxa 4031 (1), pp. 1-77 : 38

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.6122529
persistent identifier	https://treatment.plazi.org/id/C70EEC59-6E00-FFE7-FF24-1F67FAC4785E
treatment provided by	Plazi (2016-04-22 01:27:38, last updated 2024-11-26 01:39:09)
scientific name	Diastylis insularum ( Calman, 1908 )
status

Treatment

Diastylis insularum ( Calman, 1908) View in CoL

Leptostylis View in CoL (?) insularum Calman, 1908: 234 View in CoL –239.

Diastylis insularum View in CoL . — Calman, 1911: 342, 358.— Jones, 1963: 56 –57. Diastylopsis insularum . — Stebbing, 1913: 114.

Material examined. None.

Diagnosis. Female and subadult male. Carapace elongate, carapace, pereon and pleon covered with tiny spines, carapace with row of larger spines parallel to posterior margin just behind frontal lobe suture; ventral margin smooth; antennal notch present. Eyelobe without lenses. Pseudorostrum acute, 0.25 times carapace length anterior of eyelobe. Antennule article 2 longer than article 3. Maxilliped 3 ischium produced as large lobe laterally. Pereopod 1 basis ischium merus together equal to carpus propodus dactylus together, carpus shorter than propodus, propodus longer than dactylus. Pereopod 2 carpus 4 times propodus length. Pereopods 3–4 with rudimentary exopods in female. Telson with 9 lateral setae, more than 0.5 times length of uropod peduncles.

Adult male. Carapace similar to female, but carapace, pereon and pleon lacking tiny spines, row of larger spines is more obvious. Pereonite 5 is produced sharply posteriorly. Antenna extends past uropods. Telson dorsally produced.

Remarks. The line of moderately sized spines on the carapace, parallel to the posterior margin and originating posterior of the frontal lobe suture, present in both males and females, is distinctive in the New Zealand fauna.

References

Calman, W. T. (1908) Notes on a small collection of plankton from New Zealand. I, Crustaces (excluding Copepoda). Annals and Magazine of Natural History, Series 8, 1, 232 - 240.

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.

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.