Australian Amphipoda: Aoridae

J.K. Lowry, P.B. Berents & R.T. Springthorpe

Grandidierella insulae Myers, 1981b: 220, fig. 5.

Type material. HOLOTYPE: male, 4.8 mm, AM P29719. PARATYPE: female, 5.0 mm, AM P31827.

Type locality. North end of Old Settlement Beach, Lord Howe Island, under intertidal rocks.

Description. Based on Myers, 1981: 220, fig. 5 [Lord Howe Island].

Head. Antenna 1 accessory flagellum present and with one long and one rudimentary article (?). Mandible, palp article 3 longer than 2, posterior margin widest medially, mandible palp posterior margin setae of more than two distinct lengths.

Peraeon. Sternal spines absent. Gnathopod 1 enlarged in males only; coxa unproduced anterodistally; 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 twice 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 about half length of propodus. 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, moderately to sparsely setiferous; propodus moderately to sparsely setose, palm with robust seta(e) defining palm (?).

Pleon. 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 uniramous, inner ramus one and one half times length of peduncle.

Habitat. Under intertidal rocks.

Depth zones. Littoral (intertidal).

Distribution. New South Wales: Old Settlement Beach, Lord Howe Island (Myers, 1981b).

Geographic areas. South-eastern Australia.

Peraeon. Gnathopod 1 carpus subequal in length with propodus, posterior margin without spines; propodus subequal in length to 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; dactylus more than half length of propodus, significantly overlapping palm.

Cite this publication as: 'J.K. Lowry, P.B. Berents & R.T. Springthorpe (2001 onwards). Australian Amphipoda: Aoridae. Version 1: 2 October 2000. https://crustacea.net/'. Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993, 1995, 2000) should also be cited (see References).

Index