Pleusymtinae Bousfield & Hendrycks 1994
Creators
Description
Key to genera of Pleusymtinae based on the key of Hendrycks & Bousfield (2004)
1. Coxa 1 anterodistally bent forwards; coxae 1–3, posterodistal cusps often singly large, or medium and multiple (2–5 in number)................................................................................................ 2
- Coxa 1 normal, direct ventrally; coxae 1–3, posterodistal cusps usually single, medium to small in size.................. 8
2. Posterior pereon and pleon strongly mid-dorsally carinated..................................................... 3
- Body segments dorsally smooth or nearly so................................................................ 5
3. Antenna 1, peduncular segment 1 with strong anterodistal process; urosome segment 2 occluded dorsally by segments 1 & 3..................................................................................................... 4
- Antenna 1, peduncular segment 1 lacking anterodistal process; urosome 2 not occluded dorsally....................................................................................... Budnikopleustes Hendrycks & Bousfield, 2004
4. Rostrum very strong, exceeding segment 1 of antenna 1; basis of pereopod 5 is linear.......... Vinogradovopleustes n. gen.
- Rostrum medium length, not exceeding segment 1 of antenna 1; basis of pereopod 5 broadened, with distinct posterior lobe................................................................... Rhinopleustes Hendrycks & Bousfield, 2004
5. Antenna 1, peduncular segment 1 with strong anterodistal process; coxae 2–4 narrow, deep; urosome 2 not occluded dorsally................................................................. Anomalosymtes Hendrycks & Bousfield, 2004
- Antenna 1, peduncular segment 1 lacking anterodistal process (may have posterodistal tooth); coxae 2–4 normal, depth <twice; urosome 2 partly to fully occluded dorsally............................................................ 6
6. Rostrum weak, not exceeding anterior head lobe; lower lip, outer lobes widely separated, inner lobe shallow, flat; mandibular left lacinia 8–9 dentate; urosome 2 not occluded dorsally.................. Kamptopleustes Hendrycks & Bousfield, 2004
- Rostrum moderate to very strong, exceeding anterodistal head lobe; lower lip, outer lobes not widely separate, inner lobes sloped; left lacinia 6–7 dentate; urosome 2 nearly or completely occluded dorsally.................................. 7
7. Rostrum medium; antennal peduncular segment 1, process strong; pereopods 5–7, posterior margin of basis angular; uropod 2, outer ramus much shorter than inner ramus (<2/3)..... Pleusymtes pribilofensis subgroup (by Hendrycks & Bousfield 2004)
- Rostrum often strong; antennal peduncular segment 1, process weak; pereopods 5–7, posterior margin of basis rounded; uropod 2, outer ramus 80% of inner.................................................. Pleustomesus Gurjanova, 1972
8. Antenna 1, peduncular segments 2 & 3 very short, <½ of segment 1; pereopods 5–7 closely subequal in shape and size; mandibular left lacinia 11-dentate.......................................... Holopleustes Hendrycks & Bousfield, 2004
- Antenna 1, peduncular segments regular, combined length> ½ of segment 1; pereopods 5–7 usually slightly differing in size and shape; mandibular left lacinia 6–7 dentate............................................................... 9
9. Antenna 1 & 2, peduncular segments richly setose posteriorly; pereopods 1 & 2 (gnathopods 1 & 2) very weak, subequal, carpus longer than propodus; coxae 1–3, posterodistal cusps very small......... Heteropleustes Hendrycks & Bousfield, 2004
- Antenna 1 & 2, peduncular segments devoid of setae; pereopods 1 & 2 (gnathopods 1 & 2) regular; coxae 1–3, posterodistal cusps short to medium................................................................................. 10
10. Antenna 1, peduncular segment 1 with posterodistal tooth; epimeral plate 3, hind corner with posterodistal “hook”..................................................................................... Pleusymtes J.L. Barnard, 1969
- Antenna 1, peduncular segment 1 lacking posterodistal process; epimeral plate 3, hind corner squared, regularly acuminate or produced.......................................... Pleusymtes mucida subgroup (by Hendrycks & Bousfield 2004)
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Pleustidae
- Kingdom
- Animalia
- Order
- Amphipoda
- Phylum
- Arthropoda
- Scientific name authorship
- Bousfield & Hendrycks
- Taxon rank
- subFamily
- Taxonomic concept label
- Pleusymtinae Bousfield, 1994 sec. Labay, 2018
References
- Hendrycks, E. A. & Bousfield, E. L. (2004). The amphipod family Pleustidae (mainly subfamilies Mesopleustinae, Neopleustinae, Pleusymtinae and Stenopleustinae) from the Pacific coast of North America: systematics and distributional ecology. Amphipacifica, 3 (4), 5 - 113.
- Gurjanova, E. F. (1972) New species of Amphipoda (Amphipoda, Gammaridea) from a northwest part of Pacific Ocean and high Arctic regions. In: New species of sea and overland invertebrates. Trudy Zoologicheskogo instituta AN SSSR. Vol. 52. izdatelstvo " Nauka ", Leningrad, pp. 129 - 200. [in Russian]