North-eastern Atlantic Amphipoda: Aoridae

R. King & A.A. Myers

Stimpsonia chelifera Bate, 1862: 162, pl. 29, fig. 9.

Microdeutopus chelifer. --Stebbing, 1888: 334. --Chevreux & Fage, 1925: 295, fig. 306. --Myers, 1969b: 132, figs. 17, 19-20. --Myers, 1982a, 147-148, fig. 97.

Stimpsonella chelifera (Bate). --Della Valle, 1893: 424, pl. 56, fig. 42-45.

Type material. Unknown.

Type locality. Salcombe, Devon, England.

Description. Based on Myers, 1982a: 147-148, fig. 97; Myers, 1969b: 132, figs. 17, 19-20.

Head. Rostrum absent or vestigial; Lateral cephalic lobes apically truncate, anteroventral margin moderately excavate, scarcely recessed. Antenna 1 flagellum with 20 or less articles; accessory flagellum present and multiarticulate. Antenna 2 with few long setae. Maxilliped basis with strong flange on anterior margin; palp with wing-like flanges on anterior margin of basis, ischium and merus.

Peraeon. Sternal spines present, on other pereonites, apically acute. Gnathopod 1 enlarged in males only; coxa distinctly produced anterodistally, 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 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 with no spine, without an oblique row of long setae on medial face, posterior margin with stout spine or spines, two spines, proximal the larger; propodus shorter than carpus, anterior margin weakly to moderately setiferous, posterior margin sinuous or irregular with proximal lobe, palm absent; dactylus more than half length of propodus. Gnathopod 2 subchelate; basis anterodistal margin with flange, posterodistal margin without robust setae; with few setae along length of basis; carpus longer than propodus, anterior margin not lobate, moderately to sparsely setiferous; propodus moderately to sparsely setose, palm with spine defining palm. Pereopod 6 basis not or weakly produced posterodistally.

Pleon. 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. In sheltered conditions: among algae and detritus accumulation.

Depth zones. Littoral.

Remarks. Rarely known deeper than 2 metres (Myers, 1982a).

Distribution. Black Sea, Atlantic Ocean, Mediterranean Sea.

Peraeon. Sternal spines absent. Gnathopod 1 coxa distinctly produced anterodistally, sub-acute; posterior margin with dense rows of setae; carpus two thirds length of propodus, with long dense setae, posterior margin without spines; propodus longer than carpus, palm present, palm delimited from posterior margin, margin entire, palm defined by rounded or oblique corner or corner undefined, with robust seta defining palm; significantly overlapping palm. Gnathopod 2 basis anterodistal margin without flange; carpus subequal with or shorter than propodus; palm with robust seta(e) defining palm.

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