Normanion amblyops G. O . Sars, 1895

Kilgallen, Niamh M., Myers, Alan A. & Grath, David M, 2006, A revision of the North Atlantic amphipod genus Normanion (Crustacea: Amphipoda: Lysianassoidea), Zootaxa 1363, pp. 1-21 : 5

publication ID

https://doi.org/ 10.5281/zenodo.174732

DOI

https://doi.org/10.5281/zenodo.6262830

persistent identifier

https://treatment.plazi.org/id/03F6FB33-FFCD-FFEC-FE89-FE99FD66BB2D

treatment provided by

Plazi

scientific name

Normanion amblyops G. O . Sars, 1895
status

 

Normanion amblyops G. O. Sars, 1895 View in CoL

Figures 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3

Normanion amblyops G. O. Sars, 1895: 674 View in CoL , suppl. pl. 1, fig. 1. – Barnard and Karaman, 1991: 505. Normanion quadrimanus View in CoL . – 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.

NHML

Natural History Museum, Tripoli

ZMO

Zoology Museum, Oxford University

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Opisidae

Genus

Normanion

Loc

Normanion amblyops G. O . Sars, 1895

Kilgallen, Niamh M., Myers, Alan A. & Grath, David M 2006
2006
Loc

Normanion amblyops G. O . Sars, 1895: 674

Barnard 1991: 505
Stebbing 1906: 42
1991
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