Australian Amphipoda: Aoridae

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

Aora adpressa Myers & Moore, 1983

Aora adpressa Myers & Moore, 1983: 179, figs 2, 12, 13.

Type material. HOLOTYPE: male, 6.0 mm, NMV J1322. PARATYPES: 3 males, NMV J1323.

Type locality. 2 km west of Phillip Island, Western Port, Victoria.

Description. Based on Myers & Moore, 1983: 179, figs 2, 12, 13 [Western Port, Victoria].

Head. Rostrum absent or vestigial; Lateral cephalic lobes apically truncate, anteroventral margin shallowly excavate, scarcely recessed. Labium with fine setae and stout setae. Mandible, palp article 3 longer than 2, posterior margin straight or weakly falcate, mandible palp posterior margin with setae of two distinct lengths, long setae and an understory of much shorter regularly spaced setae.

Peraeon. Sternal spines present, on other pereonites, apically acute. Gnathopod 1 enlarged in males only; coxa unproduced anterodistally, or distinctly produced anterodistally, sub-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 greatly elongated, as long as or longer than elongate carpus, fused along its entire length with carpus, curved, apically acute, posterior margin with sparse setae or setae absent; 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, one spine; propodus shorter than carpus, anterior-distal margin densely clothed in long setae, 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 robust seta(e) defining palm.

Pleon. Uropod 1 biramous, peduncle much longer than broad, distoventral interramal spine shorter than peduncle. Uropod 2 peduncle with distoventral interramal spine. Uropod 3 biramous, rami subequal. Telson with distal fine setae only.

Depth zones. Littoral.

Remarks. Females are not known.

Distribution. Victoria: Western Port (Myers & Moore, 1983).

Geographic areas. South-eastern Australia, or Southern Australia.

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