Calcinus fuscus Malay, Komai & Chan, 2012

Malay, Maria Celia (Machel) D., Rahayu, Dwi Listyo & Chan, Tin-Yam, 2018, Hermit crabs of the genera Calcinus Dana, Clibanarius Dana, and Dardanus Paul’son from the PANGLAO 2004 Expedition, with description of a new species and a checklist of the hermit crabs of the Philippines (Crustacea: Anomura: Paguroidea), Raffles Bulletin of Zoology 66, pp. 23-65 : 25

Calcinus fuscus Malay, Komai & Chan, 2012

( Fig. 1B )

Calcinus anani – Kato & Okuno, 2001: 69, unnumbered photograph; Kawamoto & Okuno, 2003: 74, 1 unnumbered photograph; Asakura, 2002: 29–35, Figs. 2–3 , Fig. 21A; Poupin & Lemaitre, 2003: 8 , 13 (in part); Okuno & Arima, 2004: 54, Fig. 2A (not Calcinus anani Poupin & McLaughlin, 1998 ).

Calcinus fuscus Malay, Komai, & Chan 2012: 167 , Figs. 1 , 2 (Kume Island, Japan, type locality); Legall & Poupin, 2016.

Material examined. 1 ovig. female SL 5.6 mm ( ZRC), stn B9, Napaling , Panglao I., 9°33.1′N, 123°44.0′E, 8.5–10 m, 8.vi.2004; 2 males SL 3.0– 4.6 mm ( ZRC), stn B15, Sungcolan , Panglao I., 9°38.8′N, 123º49.2′E, 2–4 m, 16.vi.2004; 2 males SL 4.0– 4.1 mm ( ZRC), stn B32, Looc , Panglao I., 9°35.8′N, 123°44.6′E, 20 m, 26.vi.2004; 1 female SL 2.5 mm ( ZRC), stn B36, north of Doljo , Panglao I., 9°35.9′N, 123°44.5′E, 24 m, 1.vii.2004; 2 females SL 3.4–4.6 mm ( ZRC), stn B39, Pontod Lagoon 1 outside, 9°32.8′N, 123°42.1′E, 17–25 m, 3.vii.2004; 1 male SL 4.1 mm ( ZRC), stn B42, between Momo and Napaling, Panglao I., 9°37.0′N, 123°46.0′E, 30–33 m, 6.vii.2004; 1 female SL 3.0 mm ( ZRC), stn R47, Sungcolan , Panglao I., 9°38.8′N, 123°49.2′E, 4–25 m, 16.vi.2004; 1 male SL 3.2 mm ( ZRC), stn R63, Napaling, Panglao I., 9°37.2′N, 123°46.4′E, 3–40 m, 24.vi.2004 .

Habitat. Subtidal, 2–33 m deep, reef slopes and ledges, occasionally from caves in the reef wall.

Remarks. This species is closely related to the Polynesian endemic C. anani Poupin & McLaughlin, 1998 . However the two species are genetically differentiated, and show distinct differences in colouration, depth distribution, and geographic range (see Malay et al., 2012).

Figures

Fig. 1. A, Calcinus elegans (H. Milne Edwards, 1836). Male SL 10.0 mm, stn M1; B, Calcinus fuscus Malay, Komai & Chan, 2012. Male SL 4.1 mm, stn B42; C, Calcinus gaimardii (H. Milne Edwards, 1848). Female SL 5.6 mm, stn R14; D, Calcinus laevimanus (Randall, 1840). Male SL 4.4 mm, stn M2; E, Calcinus latens (Randall, 1840). Male SL 3.0 mm, stn R1; F, Calcinus lineapropodus Morgan & Forest, 1991. Male SL 4.5 mm, stn R16; G, Calcinus minutus Buitendijk, 1937. Male SL 4.7 mm, stn R10; H, Calcinus morgani Rahayu & Forest, 1999. Female ovig SL 4.8 mm, stn M2.

Fig. 2. A, Calcinus pulcher Forest, 1958. Male SL 4.8 mm, stn R24; B, Clibanarius ambonensis Rahayu & Forest, 1993. Male SL 4.0 mm, stn M16; C, Clibanarius antennatus Rahayu & Forest, 1993. Male SL 3.9 mm, stn M34; D, Clibanarius corallinus (H. Milne Edwards, 1836). Male SL 3.0 mm, stn M58; E, Clibanarius cruentatus (H. Milne Edwards, 1848). Specimen not measured and sexed, Stn M2; F, Clibanarius englaucus Ball & Haig, 1972. Male SL 4.2 mm, stn M1; G, Clibanarius infraspinatus (Hilgendorf, 1869). Male SL 9.0 mm, stn S53; H, Clibanarius laevimanus Buitendijk, 1937. Specimen not measured and sexed, stn M9.

Fig. 3. A, Clibanarius longitarsus (De Haan, 1849). Specimen not measured and sexed, stn M52; B, Clibanarius merguiensis De Man, 1888. Male SL 3.5 mm, stn M51; C, Clibanarius serenei Rahayu & Forest, 1993. Male SL 3.6 mm, stn M11; D, Clibanarius snelliusi Buitendijk, 1937. Male SL 5.3 mm, stn M1; E, Clibanarius striolatus Dana, 1852. Specimen not measured and sexed, stn M9; F, Clibanarius virescens (Krauss, 1843). Male SL 4.1 mm, stn M8; G, Dardanus deformis (H. Milne Edwards, 1836). Female SL 8.8 mm, stn M3; H, Dardanus lagopodes (Forskål, 1775). Female SL 6.6 mm, stn M8.