Mediterranean Amphipoda: Aoridae

R. King & A.A. Myers

Lembos viduarum Myers, 1974c: 41, figs. 27�32. --Myers, 1982a: 124, fig. 82.

Autonoe viduarum. --Myers, 1982a: 819. --Barnard & Karaman, 1991:173.

Type material. Unknown.

Type locality. Ischia, Italy.

Description. Based on Myers, 1982a: 124, fig. 82; Myers, 1974c: 41, figs. 27�32.

Head. Rostrum absent or vestigial; Lateral cephalic lobes apically truncate, anteroventral margin shallowly excavate, scarcely recessed. Antenna 1 flagellum with 20 or less articles; accessory flagellum present and multiarticulate. Antenna 2 with few 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 subequal to 2, posterior margin straight or weakly falcate or widest medially, mandible palp posterior margin setae of more than two distinct lengths.

Peraeon. Sternal spines present, on other pereonites, apically acute. Gnathopod 1 enlarged in males only; 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 brush of long setae, anterodistal margin with flange weak or absent, with a weak distomedial lobe or absent; ischium anterior margin without flange, posterior margin with dense rows of setae; merus not greatly elongated, fused along its entire length with carpus, posterior margin with dense rows of setae, without posterodistal spine; carpus two thirds length of propodus, anterior margin without stridulating ridges, with long dense setae, anterior surface with no spine, without an oblique row of long setae on medial face, posterior margin without spines; propodus longer than carpus, anterior-distal margin densely clothed in long setae, posterior margin straight or evenly convex, palm present, palm delimited from posterior margin, margin forming a narrow 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, palm with robust seta(e) defining palm. Pereopod 6 basis not or weakly produced posterodistally. Pereopod 7 significantly greater than 125% length of pereopod 6.

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 without distoventral interramal spine or with vestigial spine. Uropod 3 biramous, outer ramus shorter than inner, inner ramus one and one half times length of peduncle. Telson with distal fine setae and robust setae.

Habitat. Unknown.

Depth zones. Continental shelf (170 m).

Distribution. Mediterranean.

Peraeon. Sternal spines absent. Gnathopod 1 coxa unproduced anterodistally, or distinctly produced anterodistally, rounded; basis slender, much less than half as broad as long, posterodistal margin with setae sparse or absent; posterior margin with setae sparse or absent; posterior margin with sparse setae or setae absent; with setae sparse or absent; anterior margin weakly to moderately setiferous, margin entire, palm defined by rounded or oblique corner or corner undefined.

Cite this publication as: 'King, R. & A.A. Myers (2001 onwards). Mediterranean 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