Dynamene dilatata Richardson, 1899 (uncertain/ incerta sedis)

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

Dynamene dilatata Richardson, 1899 (uncertain/ incerta sedis)

Fig. 2A, B

Dynamene dilatata Richardson, 1899: 882-883, fig. 8; Richardson 1905: 304, fig. 327; Schultz 1969: 122, fig. 171; Hatch 1947: 214, pl. 7, figs 85-86.

Dynamenella dilatata .- Kussakin, 1971: 450, fig. 298; Brusca et al. 2007: 521, 537, pl. 242.

Note.

This species is retained in the genus Dynamene (in original combination) and listed as "taxon inquirendum" in WoRMS ( Boyko et al. 2008 onwards). Thus, the correct generic status of this species is still in question. Since Richardson (1899; 1905) and subsequent authors provided only a brief description with a figure of the whole body, a morphological revision is required to correctly place this species.

Type locality.

Monterey Bay, California.

Material examined.

Canada. 3 ♀♀ (up to 6.5 mm); Oregon , Lincoln Co.; 12 Aug. 1966; E.L. Bousfield leg.; CMNC 1991-2567. 1 ovigerous ♀ (8.5 mm); British Columbia, Long Beach Unit, Long Beach ; 5 Aug. 1955; E.L. Bousfield leg.; CMNC 1985-0648 . 1 ♂ (5.5 mm); British Columbia, Long Beach Unit, Long Beach ; 5 August 1955; E.L. Bousfield leg.; CMNC 1985-0660 .

Genus Dynamenella Hansen, 1905

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).