Exosphaeroma rhomburum (Richardson, 1899)

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 rhomburum (Richardson, 1899)

Fig. 2G

Sphaeroma rhomburum Richardson, 1899: 835-836, fig. 12; 1900: 222.

Exosphaeroma rhomburum .- Richardson, 1905: 290, fig. 303; Nierstrasz 1931: 195; Schultz 1969: 135, fig. 197; Kussakin 1971: 402, fig. 257; Bruce 2003: 369.

Type locality.

Monterey Bay, California.

Material examined.

USA. 3 ♂♂ (up to 4.1 mm), 2 ovigerous ♀♀ (up to 4.2 mm); Washington, Clallam Co., Makah Bay ; 31 July 1966; E.L. Bousfield leg.; CMNC 1991-2559. Canada . 4 ♂♂ (up to 4.5 mm), 4 ♀♀ (up to 5 mm); British Columbia, Range 5 Coast ; 13 July 1964; E.L. Bousfield leg.; CMNC 1984-1535 . 3 ♂♂ (up to 4.1 mm), 4 ♀♀ (up to 4.5 mm); British Columbia, Rupert Land Distr., Hope Island ; 22 July 1959; E.L. Bousfield leg.; CMNC 1984-1537 . 1 ♀ (4 mm); Alaska, Prince of Wales-Outer Ketchikan Census Area ; 31 May 1961; E.L. Bousfield leg.; CMNC 1991-2501 .

Distribution.

Monterey Bay, California, Washington to British Columbia.

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).