Cymadusa tattersalli Peart, 2004

Peart, Rachael A., 2007, A review of Australian Cymadusa (Crustacea: Amphipoda: Ampithoidae) with descriptions of eight new species, Zootaxa 1540, pp. 1-53 : 33-35

Cymadusa tattersalli Peart, 2004

( Figs. 27–28 )

Cymadusa tattersalli Peart, 2004 .

Cymadusa setosa .— Tattersall, 1922: 1 –19.

Cymadusa filosa .— Ledoyer, 1982: 130–135, figs 44–46 (form A)

Type material. Holotype: male, 17 mm, TMAG G3932, Woodman Point, Cockburn Sound, Western Australia, Australia, 32°08’S, 115°45’E, 14 July 1973, T.M. Walker & D.D. Bray.

Paratypes: TMAG G3931 (female), AM P51282 (female and male); TMAG G3933 (male); TMAG G3934–G3938 (females and males – 5 specimens), type locality.

Material examined. AM P61927, 6 specimens, northern reef flat, Heron Island, Great Barrier Reef, Queensland, Australia, 23°27’S 151°55’E, 14 February 1999, 0.5 m, Padina australis, R. Peart & S. Richards. AM P61928, 1 specimen; AM P61929, 1 specimen, Dictyotales sp.; AM P61930, 1 specimen; AM P62510, 1 specimen; AM P62511, 2 specimens; AM P62512, 4 specimens, Padina sp. and Lobophora sp., west side of Malus Island, Dampier Archipelago, Western Australia, Australia, 26°30.612’S 116°38.918’E, 27 August 1999, 2.8 m, R. Peart. AM P62513, 2 specimens, Dictyota sp.; AM P62514, 8 specimens, Padina sp., Tish Point, Rosemary Island, Dampier Archipelago, Western Australia, Australia, 20°29.671’S 116°35.894’E, 30 August 1999, 0.5 m, R. Peart. AM P62515, 4 specimens, Dictyota sp.; AM P62515, 3 specimens, Padina sp., 4.2 m, south side of Kendrew Island, Dampier Archipelago, Western Australia, Australia, 20°28.987’S 116°32.549’E, 30 August 1999, 4 m, R. Peart. AM P62516, 1 specimen, Bare Rock, Dampier Archipelago, Western Australia, Australia, 20°32.849’S 116°26.705’E, 31 August 1999, 15 m, under rocks, M. Hewitt. AM P62517, 2 specimens, Eaglehawk Island, Dampier Archipelago, Western Australia, Australia, 20°38.939’S 116°26.218’E, 3 September 1999, 10 m, red algae, R. Peart.

Diagnosis. Antenna 1 accessory flagellum with 2 articles. Maxilla 1 inner plate with 5 slender setae. Gnathopod 1 with long, dense, plumose setae on margins; merus produced to form a small, subacute distoventral lobe; carpus longer than propodus; palm acute, convex, without midmedial tooth, without posterodistal tooth defining palm, with 1 defining robust seta. Gnathopod 2 with long plumose setae on margins; merus produced to form a short, subacute distoventral lobe; carpus shorter than propodus; palm acute, entire, with subquadrate midmedial tooth, with small subacute posterodistal tooth defining palm, without defining robust seta; dactylus shorter than palm, tapering evenly, acute. Epimeron 3 posteroventral corner with small acute tooth. Uropod 3 peduncle with 7 distal robust setae; outer ramus with patch of small conical lateral denticles, with lateral setal fringe. Telson distally rounded, apical cusps small, with apical and lateral slender setae.

Habitat. This species occurs on a variety of brown algae living at 0.5–10 m depth. Remarks. Cymadusa tattersalli is closely related to C. setosa ( Haswell, 1879) and C. filosa Savigny, 1816 (see Peart 2004). This is the first time Cymadusa tattersalli has been recorded from the east coast of Australia.

Distribution. Cockburn Sound, Abrolhos Islands, Dampier Archipelago, Western Australia; Heron Island, Queensland, Australia.

Figures

FIGURE 27. Cymadusa tattersalli Peart, 2004. Male, AM P 61927, 11 mm. Female, AM P 61927, 12 mm. Heron Island, Queensland, Australia.

FIGURE 28. Cymadusa tattersalli Peart, 2004. Male, AM P 61927, 11 mm. Female, AM P 61927, 12 mm. Heron Island, Queensland, Australia. Scales 0.5 mm. Female antennae missing.