Diastylopsis
Creators: name: Gerken, Sarah
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Cumacea
Diastylidae
Diastylopsis

description: Key to all species of Diastylopsis
1. Carapace smooth, unornamented except for ridge on pseudorostral lobe........................................... 2
- Carapace with multiple ridges, sculpturing or spines.......................................................... 4
2. Telson longer than uropod peduncles........................................................ D. incompta n. sp.
- Telson shorter than uropod peduncles...................................................................... 3
3. Uropod endopod shorter than exopod.............................................................. D. crassior
- Uropod endopod longer than exopod............................................................. D. elongata
4. Carapace without ridges, anterior half with spines, increasing in length anteriorly........................ D. senta n. sp.
- Carapace with ridges, with or without spines................................................................ 5
5. Telson longer or equal to uropod peduncles................................................................. 6
- Telson shorter than uropod peduncles..................................................................... 11
6. Maxilliped 3 basis greatly expanded, opercular; carapace with ridges only on anterior 1/3................... D. thilenuisi
- Maxilliped 3 basis not greatly expanded, not opercular; carapace with ridges on at least anterior ½, may be throughout..... 7
7. Telson with 3 terminal setae..................................................................... D. trisetosa
- Telson with 2 terminal setae............................................................................. 8
8. Carapace with multiple concentric lateral ridges............................................................. 9
- Carapace with 2–3 parallel ridges........................................................................ 10
9. Telson post-anal portion longer or equal to pre-anal portion; carapace sculpturing weak........................ D. goeki
- Telson post-anal portion shorter than pre-anal portion; carapace very strongly sculptured.................... D. annulata
10. Telson subequal to uropod peduncles; pereopod 1 elongate, carpus propodus dactylus together much longer than basis ischium merus together........................................................................... D. bicarina n.sp.
- Telson longer than uropod peduncles; pereopod 1 not elongate, carpus propodus dactylus together much shorter than basis ischium merus together.................................................................. D. aspratilis n. sp.
11. Telson more than half length of uropod peduncles...................................................... D. tenuis
- Telson less than half length of uropod peduncles..................................................... D. dawsoni
description: Published as part of Gerken, Sarah, 2015, New Zealand Diastylidae and Gynodiastylidae (Crustacea: Cumacea), pp. 1-77 in Zootaxa 4031 (1) on page 42, DOI: 10.11646/zootaxa.4031.1.1, http://zenodo.org/record/289704