Australian Amphipoda: Melitae

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

Ceradocus (Ceradocus) woorree Berents, 1983

Ceradocus (Ceradocus) woorree Berents, 1983: 106, figs. 5-6.

Type material. HOLOTYPE: male, 6.9 mm, AM P31714. PARATYPE: male, 5.9 mm, AM P31715.

Type locality. Eastern end of Mangrove Beach, Lizard Island, Great Barrier Reef (14º 41'S 145º 27.5'E).

Description. Based on Berents, 1983: 106, figs. 5-6. Head with anteroventral notch or slit, anteroventral corner rounded. Antenna 1 longer than antenna 2; peduncular article 1 not geniculate with article 2, subequal in length to article 2, with 3 robust setae along posterior margin; flagellum with 17 articles; accessory flagellum with 5 articles. Antenna 2 peduncular article 2 cone gland reaching at least to end of peduncular article 3; flagellum with 11 articles. Mandible palp present, well developed, with setae mostly terminal, article 2 longer than article 3, article 1 produced distally, shorter than article 2. Maxilla 1 inner plate with setae mainly terminal.

Pereon. Gnathopod 1 not sexually dimorphic; coxa anteroventral corner produced, acute; merus without posterodistal tooth; carpus about 2 x as long as broad; propodus without anterodistal projection, posterodistal margin not swollen, palm acute, straight, defined by posterodistal corner. Gnathopod 2 sexually dimorphic; subchelate; left and right gnathopods unequal in size; coxa posteroventral corner notch absent; palm angle acute, convex, posterodistal tooth absent, with robust setae; dactylus apically blunt; palm convex, without posteroventral tooth. Peraeopod 5 basis posterior margin straight. Peraeopod 5 basis posteroventral corner narrowly rounded or subquadrate. Peraeopod 6 coxa anterior lobe ventral margin not produced ventrally. Peraeopod 6 basis posterior margin straight. Peraeopod 6 basis posteroventral corner narrowly rounded or subquadrate. Peraeopod 6 propodus not expanded posterodistally. Peraeopod 7 basis posterior margin convex (slightly). Peraeopod 7 basis with posterior margin smooth or minutely castelloserrate, posteroventral corner broadly rounded. Peraeopod 7 propodus not expanded posterodistally.

Pleon. Pleonite 1 with dorsal serrations, without dorsodistal spines, not dorsally bicarinate. Pleonite 2 with dorsal serrations, without dorsodistal spines, not dorsally bicarinate. Pleonite 3 with dorsal serrations, without dorsodistal spines, dorsally smooth. Epimeron 1 anteroventral corner without curved spine. Epimera 1-2 posteroventral margin without spines above posteroventral corner. Epimeron 3 posterior margin smooth, posteroventral corner with small acute spine, posteroventral margin smooth. Urosomite 1 without dorsal carina, without a small dorsal hump, without dorsal serrations, without spines or gape, not dorsally bicarinate. Urosomite 1 without posterodorsal spine. Urosomite 2 without dorsolateral robust setae. Urosomite 3 without dorsal robust setae. Uropod 1 peduncle without distoventral spur. Uropod 3 exceeding uropods 1 and 2; inner ramus subequal in length to outer ramus; outer ramus long (more than 1.6 x longer than peduncle). Telson cleft. Telson without robust setae on inner margins. Telson each lobe with 3 or more apical/subapical robust setae, apical conical extension reaching scarcely one third along longest seta.

Habitat. Marine; living in sediment and under stones at low tide level.

Depth zone. Littoral (intertidal).

Remarks. This species is appears to be closely related to C. aviceps K.H. Barnard, 1940 from South Africa.

Distribution. Queensland: Lizard Island, Great Barrier Reef (Berents, 1983).

Australian geographic areas. North-eastern Australia.

Cite this publication as: 'J.K. Lowry, P.B Berents & R.T. Springthorpe (2000 onwards). Australian Amphipoda: Melitae Descriptions, Illustrations, Identification and Information Retrieval. Version: 2 October 2000. https://crustacea.net'.