Family ISCHNOMESIDAE Hansen, 1916
- Ischnomesidae Hansen, H.J. 1916. Crustacea Malacostraca III: The Order Isopoda. Danish Ingolf-Expedition 3(5): 1-262, pls 1-16 [54].
Introduction
Ischnomesids are cylindrical, blind, deep-water isopods with an elongate pereonite 5 (Kavanagh & Wilson, 2007). Family was rediagnosed by Merrin & Poore (2003) and again by Kavanagh & Sorbe (2006). Maximum size recorded is 14.5 mm but many species are much smaller.
Diagnosis
Body elongate, subcylindrical; head fused to pereonite 1; pereonite 5 elongate, cylindrical, much longer than pereonites 6, 7. Pleon without or with 1 or 2 free pleonites. Eyes absent. Pereopod 1 prehensile; pereopods 2–7 ambulatory; pereopod 4 coxa inserting on anterolateral margin; pereopodal 2–7 dactyli with 1 unguis. Uropod uniramous.
General References
Kavanagh, F.A. & Sorbe, J.-C. 2006. Haplomesus longiramus sp. nov. (Crustacea: Isopoda: Asellota), a new ischnomesid species from the Bay of Biscay, northeast Atlantic Ocean. Zootaxa 1300: 51-68
Kavanagh, F.A. & Wilson, G.D.F. 2007. Revision of the genus Haplomesus (Isopoda:Asellota:Ischnomesidae) with erection of four new genera. Invertebrate Systematics 21: 487-535
Merrin, K.L. & Poore, G.C.B. 2003. Four new species of Ischnomesidae (Crustacea: Isopoda: Asellota) from off south-eastern Australia. Memoirs of Museum Victoria 60: 285-307
History of changes
| Published | As part of group | Action Date | Action Type | Compiler(s) |
|---|---|---|---|---|
| 13-Mar-2025 | CRUSTACEA Brünnich, 1772 | 29-Jan-2025 | MODIFIED | Dr Gary Poore |
| 05-Aug-2022 | 05-Mar-2012 | MODIFIED | ||
| 05-Aug-2022 | 05-May-2011 | MODIFIED | ||
| 05-Aug-2022 | 29-Jun-2010 | MODIFIED | ||
| 29-Mar-2010 | MODIFIED |