Calcinus elegans (H. Milne Edwards, 1836)

(Fig. 1A)

Pagurus elegans H. Milne Edwards, 1836: 278, pl. 13, Fig. 2 ( New Ireland, New Guinea, type locality).

Calcinus elegans – Estampador, 1937: 505; Yap-Chiongco, 1938: 206, pl. 2, Fig. 10; Estampador, 1959: 53; Haig & McLaughlin, 1984: 108; Wooster, 1984: 128–130; Haig & Ball, 1988: 159; Morgan, 1991: 274–276, Figs. 7–9; Gherardi & McLaughlin, 1994: 618; Poupin, 1997: 687, Figs. 2A, 3A, 4A; Asakura, 2002: 40–43, Figs. 7–8, Fig. 21C–D; McLaughlin et al., 2007: 155–156, unlabelled figures.

Material examined. 1 male SL 10.0 mm, 1 indiv. in shell (ZRC), stn M1, Alona Beach, Panglao I., 9°32.9′N, 123°46.6′E, 0–1 m, v.2004 to vii.2004; 1 male SL 4.8 mm (ZRC), stn M20, Pamilacan I., 9°29.3′N, 123º55.1′E, 0–2 m, 13.vi.2004; 1 male SL 5.4 mm (ZRC), stn M58, Balicasag I., 9°31.3′N, 123°41.0′E, depth unknown, 4.vii.2004 .

Habitat. Intertidal to shallow subtidal, 0–2 m deep, on hard bottoms (coralline and rocky substrates).

Remarks. The name C. elegans previously included the Indo-West Pacific form, with bright blue bands on the pereopods, and the Hawai’ian form, with orange-red banded pereopods (Haig & McLaughlin, 1984; Hoover, 1998). However the consistent colour differences, the geographical separation of these two colour forms, and genetic evidence all suggest that they are distinct species (Malay & Paulay, 2010, Fig. 9). The Hawai’ian form should be properly named C. pictus (Owen, 1839) based on Owen’s (1839) description and colour illustration of specimens collected in Oahu (see also Legall & Poupin, 2016).