North-eastern Atlantic Amphipoda: Aoridae

R. King & A.A. Myers

Lembos denticarpus Myers & McGrath, 1978: 125-131, figs. 1-3. --Lincoln, 1979: 492, figs. 235-236.

Autonoe denticarpus. --Barnard & Karaman, 1991: 173.

Type material. Unknown.

Type locality. North Sound, Galway Bay, Ireland.

Description. Based on Myers & McGrath, 1978:125-131, figs. 1-3.

Head. Rostrum absent or vestigial; Lateral cephalic lobes apically round, anteroventral margin shallowly excavate, scarcely recessed. 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 subequal to 2, posterior margin strongly falcate or straight or weakly falcate, mandible palp posterior margin setae of more than two distinct lengths.

Peraeon. Sternal spines absent. Gnathopod 1 enlarged in males only; coxa distinctly produced anterodistally, acute; basis slender, much less than half as broad as long, without a spine, anterior margin without stridulating ridges, posterodistal margin with setae sparse or absent, anterodistal margin with strong flange, 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 one and one third to one and one half length of propodus, anterior margin without stridulating ridges, with setae sparse or absent, anterior surface spine present, without an oblique row of long setae on medial face, posterior margin without spines; propodus subequal in length to 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, without robust seta defining palm, with spine near base of dactylus, with subtriangular, apically subacute or rounded spine; 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 longer than propodus, anterior margin not lobate, densely setose; propodus densely 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 rami subequal, peduncle much longer than broad, distoventral interramal spine shorter than peduncle. Uropod 2 peduncle with distoventral interramal spine. Uropod 3 biramous, rami subequal, inner ramus subequal with length of peduncle. Telson with distal fine setae only.

Habitat. Likely to be associated with sessile epifauna of granite outcrops (Myers & McGrath, 1978).

Depth zones. Continental shelf (40m).

Distribution. Galway Bay, Ireland.

Peraeon. Gnathopod 1 anterodistal margin with flange weak or absent; carpus two thirds length of propodus; propodus longer than carpus, with robust seta defining palm, without spine near base of dactylus. Gnathopod 2 carpus subequal with or shorter than propodus, moderately to sparsely setiferous; propodus moderately to sparsely setose, palm with robust seta(e) defining palm.

Pleon. Uropod 1 distoventral interramal spine longer than peduncle.

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