Exosphaeroma gigas (Leach, 1818)

Khalaji-Pirbalouty, Valiallah & Gagnon, Jean-Marc, 2023, Illustrated catalogue of sphaeromatoid isopods (Crustacea, Malacostraca) in the Canadian Museum of Nature (CMN), Zoosystematics and Evolution 99 (2), pp. 375-389 : 375

Exosphaeroma gigas (Leach, 1818)

Fig. 2E, F

Sphaeroma gigas Leach, 1818: 346-347; Desmarest 1825: 301; Milne-Edwards 1840: 205; White 1847: 102; Dana 1853: 775; Miers 1879: 202-203; Haswell 1882: 287; Studer 1884: 17-18; Dollfus 1891: 62, pl. 8a, fig. 6. Miers 1879: 202-203; Haswell 1882: 287; Studer 1884: 17-18; Dollfus 1891: 62, pl. 8a, fig. 6.

Sphaeroma jurinii .- Krauss, 1843: 65.

Sphaeroma propinqua .- Nicolet, 1849: 277-278.

Sphaeroma chilensis .- Dana, 1853: 195-196.

Sphaeroma obtusa .- Hutton, 1879 (in Chilton 1906).

Exosphaeroma gigas .- Stebbing, 1900: 553-558, pl. 39; Chilton 1906: 271-272; Ortmann 1911: 646-647; Vanhöffen 1914: 510-511; Tattersall 1921: 216; Giambiagi 1925: 235; Stephensen 1927: 362; Nierstrasz 1931: 194; Barnard 1940: 413, fig. 13; Hurley 1961: 269; Hale 1929: 275, fig. 273; Menzies 1962a: 132-134, fig. 43; Kussakin 1967: 235; Hurley and Jansen 1977: 58, fig. 52; Carvacho, 1977: 177-178; Kussakin and Vasina1980: 355-359; Brandt and Wägele 1989: 209-214. figs 5-9; Bruce 2003: 368.

Type locality.

Unknown; The Natural History Museum, syntypes: 1941: 6:27: 5 (presented by Leach) and 1979: 420: 1, Sir Joseph Banks collection ( Ellis 1981).

Material examined.

Chile. 22 ♂♂ (up to 24 mm), 50 ♀♀ (up to 18 mm); Magallanes and Chilean Antarctica Region, Picton Island; 7 Feb. 1970; E.L. Bousfield leg.; CMNC 1990-0090. 46 ♂♂ and ♀♀; Magallanes and Chilean Antarctica Region, Navarino Island; 29 Jan. 1970; E.L. Bousfield leg.; CMNC 1990-0092. 300 ♂♂ and ♀♀; Magallanes and Chilean Antarctica Region, Canal Beagle; 19 Feb. 1970; E.L. Bousfield leg.; CMNC 1990-0094. FALKLAND. 1♀ (16 mm); Atlantic Ocean , Falkland Island , East Falkland ; 1 Feb. 1969; S.W. Gorham leg.; CMNC 1992-0545. 9 ♂♂ and ♀♀ (up to 18 mm); East Falkland ; 25 Jan. 1967; S.W. Gorham leg.; CMNC 1992-0552 .

Distribution.

Magallanes and Chilean Antarctica Region, Tierra del Fuego, Falkland Islands, Crozet Islands, Kerguelen Islands, Peru, South Africa, South Australia, New Zealand (Chatham Rise, Macquarie Island, Auckland Island, Campbell Island), Tasmania ( Dana 1853; Vanhöffen 1914; Tattersall 1914; Kussakin 1967; Brandt and Wägele 1989).

Figures

Figure 2. Dynamene dilatata Richardson, 1899, female, (CMNC 1991 - 2567). A. Lateral view; B. Dorsal view; C. Dynamenella sheareri (Hatch, 1947), male, (CMNC 1990 - 0070); D. Dynoides canadensis Khalaji-Pirbalouty & Gagnon, 2021, (CMNC 1985 - 0667 b). Exosphaeroma gigas (Leach, 1818), male, (CMNC 1990 - 0090); E. Dorsal view; F. Lateral view. Exosphaeroma rhomburum (Richardson, 1899), male, (CMNC 1991 - 2559); H. Exosphaeroma russellhansoni Wall, Bruce & Wetzer, 2015, male, (CMNC 1984 - 1465).