Entoniscidae Kossmann 1881
Creators: name: Detorre, Marissa
name: Williams, Jason D.
name: Boyko, Christopher B.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Entoniscidae

description: Key to genera of Entoniscidae, modified from Adkison (1990) and Shiino (1942)
1. marsupium formed by close adhesion of the oostegites to host membrane; males with segmented pereopods.............. 2
- marsupium formed entirely by host membrane, oostegites free, not adhering to host membrane, pleural lamellae absent, females lacking pereopods, males with unsegmented pereopods (Entoniscinae)............................................ 3
2. parasitic in hermit crabs; females without pleural lamellae, female with heart tubercle in pleomere 1 (Diogenioninae n. subfam.)..................................................................................... Diogenion
- parasitic in other decapods; females with well-developed pleural lamellae, female with heart tubercle in pleomere 3 (Entioninae)......................................................................................... 6
3. parasitic in hermit crabs; oostegite 1 largest with ascendant and recurrent lobes, oostegites 2–5 at posterior end of pereon; male with antenna not projecting beyond margin of head............................................... Paguritherium
- parasitic in other decapods.............................................................................. 4
4. female without maxilliped; terminal segment of male bifurcated...................................... Entoniscoides
- female with maxilliped; terminal segment of male undivided................................................... 5
5. more than 2 pairs of oostegites present; unpaired dorsal ovarian processes................................ Entoniscus
- oostegite 1 absent; only 2 pairs of oostegites forming brood pouch...................................... Synalpheion
6. males with five pairs of pereopods; female pereon with pairs of lateral ovarian processes and without unpaired ventral or dorsal processes................................................................................... Allocancrion
- males with six pairs of pereopods......................................................................... 7
7. female pereon without any ovarian processes............................................................... 8
- female pereon with at least 1 ovarian process................................................................ 9
8. female with two transverse lobes on oostegite 1 and fused oostegites 2–5; males with pair of lateral expansions on each of the first two pleomeres............................................................................. Pinnixion
- female with one transverse lobe on oostegite 1 and separate oostegites 2–5; males with pair of expansions only on pleomere 1............................................................................................ Entionella
9. mature female with dorsal ovarian processes of variable number, rarely absent.................................... 10
- mature female without dorsal ovarian processes............................................................. 11
10. mature female with two ventral ovarian processes....................................................... Entione
- mature female without ventral ovarian processes...................................................... Cancrion
11. female with dorsolateral ovarian processes................................................................ 12
- female without dorsolateral ovarian processes.............................................................. 14
12. female pereon with one unpaired dorsolateral ovarian process........................................... Micippion
- female pereon with paired dorsolateral ovarian processes..................................................... 13
13. female with one pair of dorsolateral ovarian processes................................................. Portunion
- female with two pairs of dorsolateral ovarian processes.................................................. Priapion
14. female with 1 unpaired ventral ovarian process........................................................ Xanthion
- female with 2 unpaired ventral ovarian processes............................................................ 15
15. female first oostegite without transverse lamellae................................................... Pinnotherion
- female first oostegite with transverse lamellae.............................................................. 16
16. female posterior oostegites reduced, not enclosing recurrent lamella of first oostegite......................... Tiarinion
- female posterior oostegites enclosing recurrent lamella of first oostegite.................................... Achelion
description: Published as part of Detorre, Marissa, Williams, Jason D. & Boyko, Christopher B., 2023, A review of the endoparasitic isopods (Epicaridea: Entoniscidae) from hermit crabs, including description of the new subfamily Diogenioninae and a new species of Paguritherium Reinhard, 1945 from the Philippines, pp. 12-40 in Zootaxa 5249 (1) on pages 29-30, DOI: 10.11646/zootaxa.5249.1.2, http://zenodo.org/record/7685279