Australian Amphipoda: Aoridae

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

Grandidierella bonnieroides Stephensen, 1948

Grandidierella bonnieroides Stephensen, 1948: 12, fig. 3.

Grandidierella megnae. --Chilton, 1921a: 548, fig. 10.--Stephensen, 1933a: 434. --Stephensen, 1933b: 446. --Shoemaker, 1935: 70.

Grandidierella bonnieroides. --Myers, 1970: 141. --Myers, 1981b: 218. --Asari & Myers, 1982: 252, figs 9�10.

Unciolella lunata. --Schellenberg, 1928: 669, fig. 207.

Grandidierella bonnieri. --K.H. Barnard, 1935: 299. --K.H. Barnard, 1951: 708. --K.H. Barnard, 1952: 279, fig. 1. --Pannikar & Aiyar, 1937: 294. --Schellenberg, 1938a: 215. --Shoemaker, 1948: 11, fig. 3. --Ruffo, 1958: 58, figs 8�9. --Nayar, 1959: 38, pl. 14, figs 1�5. --Nayar, 1965: 161, fig.17f.

Type material. HOLOTYPE: male, 6 mm. PARATYPE: female, 5.5 mm (whereabouts unknown).

Type locality. Salinja Paloe Lechi, Bonaire, Caribbean Sea.

Description. Based on Asari & Myers, 1982: 252: figs 9�10 [India].

Head. Rostrum absent or vestigial; Lateral cephalic lobes apically round, anteroventral margin moderately excavate, moderately 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 only. Maxilla 1 inner plate without setae. Maxilliped basis without strong flange on anterior margin. Mandible, palp article 3 subequal to 2, posterior margin straight or weakly falcate, 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 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 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 with stout spine or spines, one spine; propodus shorter than carpus, anterior margin weakly to moderately setiferous, posterior margin straight or evenly convex, palm absent; dactylus more than 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. Pereopod 6 basis not or weakly produced posterodistally. Pereopod 7 significantly less 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 uniramous, inner ramus twice length of peduncle. Telson with distal fine setae only.

Habitat. Among algae; phanerogammes; associated with mangrove litter; in sand.

Depth zones. Littoral.

Distribution. Queensland: Lizard Island (Myers, 1981b).

Geographic areas. North-eastern Australia.

Extrinsic distribution. Circumtropical.

(Variant) Female (sexually dimorphic characters).

Peraeon. On pereonite 1 only. Gnathopod 1 basis slender, much less than half as broad as long; carpus subequal in length with propodus; propodus subequal in length to carpus, palm present, palm delimited from posterior margin, margin entire, palm defined by rounded or oblique corner, with robust seta defining palm; 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.'. Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993, 1995, 2000) should also be cited (see References).