Cymadusa setosa ( Haswell, 1879 )

Peart, Rachael A., 2007, A review of Australian Cymadusa (Crustacea: Amphipoda: Ampithoidae) with descriptions of eight new species, Zootaxa 1540, pp. 1-53 : 31-33

Cymadusa setosa ( Haswell, 1879)

( Figs. 24–26 )

Ampithoe setosa Haswell, 1879: 338 [type locality: Kurnell, Botany Bay, New South Wales, Australia, by neotype designation ( Peart 2004)]

Ampithoe flindersi Stebbing, 1888: 1120 , pl. 18 [type locality: Flinders Passage, Gulf of Carpentaria, Queensland, 10°30’S, 142°18’E] [new synonymy].

Grubia setosa .— Stebbing, 1906: 644.

Cymadusa compta .— Bousfield, 1973: 182 –183, pl. LV.2.— Nelson, 1980 (ecology).

Grubia filosa .— Schellenberg, 1928: 666, fig. 206.— K.H. Barnard, 1937: 171 –172. Shoemaker, 1935: 245 –249, figs 4– 5.

Cymadusa filosa .— J.L. Barnard, 1955: 29 –30, fig. 15 (with references).— J.L. Barnard, 1965: 3 (key).— Rabindranth, 1972: 173 –175, figs 8–9.— Griffiths, 1973: 277 –278; 1974a: 225; 1974b: 274; 1975: 106; 1976: 25 (key).— Ledoyer, 1984: 15 –18, figs 5–6 (Group II setose).

Cymadusa setosa .— Peart, 2004 (full synonymy, key and references).

Type material. Neotype, male, 10.5 mm, AM P10853, on rocky shores between tide marks, Kurnell, Botany Bay, New South Wales, Australia, 34°0.1’S 151°13.0’E, 27 October 1927, F. A. McNeill & T. Iredale.

Other material examined. Holotype of Ampithoe flindersi Stebbing, 1888 , female, NHM 89.5.15.136, Flinders Passage, Gulf of Carpentaria, Queensland, 10°30’S, 142°18’E, “Challenger” stn 186.

Diagnosis. Antenna 1 accessory flagellum with 2 articles. Maxilla 1 inner plate with 11 slender seta. Gnathopod 1 with long dense plumose setae on margins; merus produced to form a long, acute distoventral lobe; carpus much longer than propodus; palm acute, entire, 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 subacute tooth. Uropod 3 peduncle with 7 distal robust setae; outer ramus without patch of small conical lateral denticles, with lateral setal fringe. Telson distally truncate, apical cusps small, with lateral and apical slender setae. Habitat. Rock pools.

Remarks. Peart (2004) redescribed Cymadusa setosa and discussed its status and disjunct distribution in relation to similar species, especially C. filosa Savigny, 1816 .

Stebbing (1888) described Ampithoe flindersi from Flinders Passage, Gulf of Carpentaria. Restudy of the type material and the detailed type description of A. flindersi shows that it was based on female Cymadusa setosa , not C. filosa as proposed by Barnard & Karaman (1991). Therefore, the two species are herein synonymised.

Distribution. New South Wales and Queensland, Australia; United States of America; Puerto Rico, Caribbean Sea; Hawaiian Islands and New Caledonia, Pacific Ocean; southern tip of India, Indian Ocean.

Figures

FIGURE 24. Cymadusa setosa (Haswell, 1879). Neotype, male, 10.5 mm, AM P 10853. Female, 11 mm, AM P 10854, Kurnell, Botany Bay, New South Wales, Australia.

FIGURE 25. Cymadusa setosa (Haswell, 1879). Neotype, male, 10.5 mm, AM P 10853. Female, 11 mm, AM P 10854, Kurnell, Botany Bay, New South Wales, Australia. Scales 0.5 mm.

FIGURE 26. Cymadusa setosa (Haswell, 1879). Neotype, male, 10.5 mm, AM P 10853. Female, 11 mm, AM P 10854, Kurnell, Botany Bay, New South Wales, Australia. Scales 0.5 mm.