Normanion amblyops G.O. Sars 1895
Description
Normanion amblyops G. O. Sars, 1895
Figures 1–3
Normanion amblyops G. O. Sars, 1895: 674, suppl. pl. 1, fig. 1. – Barnard and Karaman, 1991: 505. Normanion quadrimanus. – Stebbing, 1906: 42 (in part).
Type material. SYNTYPES: 5 specimens in alcohol, 4–5.5 mm, NHML 1911. 11. 8. 12768–12772.
Type locality. Rødbjerget, Trondhjemsfjord. 366–549 m (200–300 fathoms).
Material examined. Syntypes, 5 specimens in alcohol, 4–5.5 mm, from Trondhjemsfjord, NHML 1911.11.8:12768–12772; ZMO F10526, 2 specimens on slides, 5–5.5 mm.
Description. Lateral cephalic lobes subquadrate. Eyes present. Antenna 1 more or less subequal to antenna 2; flagellum 7-articulate, flagellum article 1 distinctly elongate; callynophore present; accessory flagellum 3-articulate. Antenna 2 flagellum 6-articulate; calceoli absent. Mandible palp attached proximal to molar. Maxilliped palp 4-articulate, article 4 rudimentary, palp reaching well beyond tip of inner plate.
Gnathopod 1 subchelate; coxa 1 slightly shorter than coxa 2, rounded distally; ischium elongate, more than twice as long as broad; carpus subequal in length to propodus; propodus broader than long, palm transverse, striated, and posterodistally delimited by 2 robust setae and a central spine. Gnathopod 2 minutely chelate; carpus twice as long as propodus. Pereopods 3 and 4 with short dactyls. Coxa 5 produced into a posterior lobe; pereopod 5 basis almost twice as long as broad, produced well beyond ischium; dactylus extremely long and slender. Coxa 6 produced into a posterior lobe; pereopod 6 basis almost twice as long as broad, produced beyond ischium. Pereopod 7 basis longer than broad, not produced beyond ischium.
Pleonites 1–3 with very slight dorsal depression; epimeron 1 anterodistal corner subquadrate; epimeron 3 posterodistal corner rounded. Urosomite 1 with distinct dorsal depression, distally followed by a rounded dorsal carina. Uropod 1 rami subequal; uropod 2 rami distinctly unequal, inner ramus longer than outer ramus; uropod 3 rami subequal.
Distribution. Norwegian Sea. Approximately 360– 550 m.
Remarks. N. amblyops differs from all other species of Normanion, except N. abyssi, in having a rudimentary fourth article on the maxilliped palp. It differs from descriptions N. abyssi in the presence of eyes.
Other
Published as part of Kilgallen, Niamh M., Myers, Alan A. & Grath, David M, 2006, A revision of the North Atlantic amphipod genus Normanion (Crustacea: Amphipoda: Lysianassoidea), pp. 1-21 in Zootaxa 1363 on page 5, DOI: 10.5281/zenodo.174732Files
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Opisidae
- Genus
- Normanion
- Kingdom
- Animalia
- Order
- Amphipoda
- Phylum
- Arthropoda
- Scientific name authorship
- G.O. Sars
- Species
- amblyops
- Taxon rank
- species
- Taxonomic concept label
- Normanion amblyops Sars, 1895 sec. Kilgallen, Myers & Grath, 2006
References
- Barnard, J. L. & Karaman, G. S. (1991) Records of the Australian Museum. The Families and Genera of Marine Gammaridean Amphipods (Except Marine Gammaroids). Supplement 13. Part 2. 419 - 866.
- Stebbing, T. R. R. (1906) Amphipoda 1. Gammeridea. Das Tierreich. Verlag von R. Friedlander und Sohn, Berlin, 806 pp., 127 figs.