North-eastern Atlantic Amphipoda: Aoridae

R. King & A.A. Myers

Lembos longidigitans Stebbing, 1899: 350. --Stebbing, 1906: 594. --Stephensen, 1944: 22, fig. 15. --Myers, 1979b: 263�269, figs. 196�199.

Autonoe longidigitans. --Bonnier, 1896: 659, pl. 40, fig. 1. --Barnard and Karaman, 1991: 173.

Type material. Unknown.

Type locality. Off Spain, Bay of Biscay (44� 17`N, 4� 38`W).

.

Description. Based on Myers, 1979b: 263�269, figs. 196�199.

Head. Rostrum absent or vestigial; Lateral cephalic lobes apically truncate or apically round, anteroventral margin shallowly excavate, scarcely recessed. Antenna 1 flagellum with 21 or more articles; accessory flagellum present and multiarticulate. Antenna 2 with profuse long setae. Labium with fine setae only. Maxilla 1 inner plate with 1 long pectinate apical seta. Maxilliped basis without strong flange on anterior margin. Mandible, palp article 3 longer than 2, posterior margin strongly falcate, mandible palp posterior margin setae of more than two distinct lengths.

Peraeon. Sternal spines absent. Gnathopod 1 coxa distinctly produced anterodistally, sub-acute; basis robust, half or more as broad as long, without a spine, anterior margin without stridulating ridges, posterodistal margin with setae sparse or absent, anterodistal margin with flange weak or absent, with a weak distomedial lobe or absent; ischium anterior margin without flange, posterior margin with setae sparse or absent; merus not greatly elongated, fused along its entire length with carpus, posterior margin with sparse setae or setae absent, without posterodistal spine; carpus two thirds length of propodus, anterior margin without stridulating ridges, with setae sparse or absent, anterior surface with no spine, without an oblique row of long setae on medial face, posterior margin without spines; propodus longer than carpus, anterior margin weakly to moderately setiferous, posterior margin straight or evenly convex, palm present, palm delimited from posterior margin, margin forming a broad excavate sinus, palm defined by strong posterodistal spine, with robust seta defining palm, without spine near base of dactylus; dactylus more than half length of propodus, significantly overlapping palm. Gnathopod 2 subchelate; basis anterodistal margin without flange, posterodistal margin without robust setae; with few setae along length of basis; carpus subequal with or shorter than propodus, anterior margin not lobate, moderately to sparsely setiferous; propodus moderately to sparsely setose, without robust seta or spine defining palm. Pereopod 6 basis not or weakly produced posterodistally.

Pleon. Epimeron 3 posterodistal margin rounded. Uropod 1 biramous, rami inner ramus distinctly longer than outer, peduncle much longer than broad, distoventral interramal spine shorter than peduncle. Uropod 2 peduncle with distoventral interramal spine. Uropod 3 biramous, outer ramus shorter than inner, inner ramus twice length of peduncle. Telson with distal fine setae only.

Habitat. Unknown.

Depth zones. Lower bathyal.

Distribution. Off Spain, Bay of Biscay (44� 17`N, 4� 38`W).

Cite this publication as: 'King, R. & A.A. Myers (2001 onwards). North-eastern Atlantic Amphipoda: Aoridae. Version 1: 1 September 2001. https://crustacea.net/'. Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993, 1995, 2000) should also be cited (see References).

Index