North-eastern Atlantic Amphipoda: Aoridae

R. King & A.A. Myers

Type material. Unknown.

Type locality. Unknown.

Description. Based on L'Hardy and Truchot, 1964:125�135, figs.1�4.

Head. Rostrum absent or vestigial; Lateral cephalic lobes apically round, anteroventral margin shallowly excavate, scarcely recessed. Antenna 1 flagellum with 20 or less articles; accessory flagellum present and with one long and one rudimentary article. Antenna 2 with few long setae. Labium with fine setae and stout setae. Maxilla 1 inner plate with 1 long pectinate apical seta. Maxilliped basis without strong flange on anterior margin. Mandible, palp article 3 shorter than 2, posterior margin straight or weakly falcate, mandible palp posterior margin setae of more than two distinct lengths.

Peraeon. Gnathopod 1 enlarged in both sexes; 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 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 one third 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 entire, palm defined by subquadrate corner, without robust seta defining palm, without spine near base of dactylus; dactylus about half length of propodus, fitting 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, palm with robust seta(e) defining palm. Pereopod 6 basis produced posterodistally into a distinct "heel". Pereopod 7 significantly less than 125% length of pereopod 6.

Pleon. Epimeron 3 posterodistal margin produced into a strong spine below a deep sinus. Uropod 1 biramous, peduncle much longer than broad. Telson with distal fine setae only.

Habitat. Unknown.

Depth zones. Littoral, or Continental shelf.

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