Clibanarius laevimanus Buitendijk, 1937

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 : 33

Clibanarius laevimanus Buitendijk, 1937

( Fig. 2H )

Clibanarius laevimanus Buitendijk, 1937: 254–258 , Figs. 3–5 (Maratoea, Aroe Island, Indonesia and Bongao, Philippines, type localities); Dechancé, 1963: 31; Rahayu & Forest, 1993 (1992): 757–758; Cassidy & McLaughlin, 1997: 80–82, Fig. 2 ; Poupin et al., 2013: 36, Fig. 18C.

Material examined. 1 ovig. female SL 2.3 mm, 3 females SL 2.0– 2.2 mm, 3 males SL 2.2–3.0 mm, 1 indiv. in shell ( ZRC), stn M8, Doljo, north coast, Panglao I., 9°35.4′N, 123°44.3′E, 0–1 m, 2.vi.2004 ; 17 females SL 2.0– 3.5 mm, 43 males SL 1.8–4.1 mm, 8 indivs. in shell ( ZRC), stn M9, inside lagoon near Doljo Point, Panglao I., 9°35.1′N, 123°43.6′E, 0–0.5 m, 4.vi.2004 ; 3 ovig. females SL 3.0– 3.2 mm, 13 females SL 2.2–4.2 mm, 10 males SL 1.8–4.5 mm, 4 indivs. in shell ( ZRC), stn M11, Sungcolan Bay, Panglao I., 9°38.3′N, 123°49.6′E, 0–3 m, 6.vi.2004 ; 6 damaged indivs. ( ZRC), stn M15, Baclayon, Bohol I., 9°37.2′N, 123°55.4′E, 0–1 m, 9.vi.2004 ; 1 female SL 2.6 mm, 3 males 2.2–3.0 mm, 1 indiv. in shell ( ZRC), stn M17, Pontod Islet, Panglao I., 9°33.4′N, 123°43.0′E, 0–1 m, 9.vi.2004 ; 2 males SL 2.6–2.7 mm, 2 indivs. in shell ( ZRC), stn M18, Gak-Ang Islet, off Panglao I., 9°33.0′N, 123°45.5′E, 0–1 m, 10 & 12.vi.2004 ; 4 females SL 2.8–4.4 mm, 1 male SL 4.4 mm, 1 indiv. in shell ( ZRC), stn M24, Manga, Panglao I., 9°42.1′N, 123°51.3′E, 0–1 m, 17.vi.2004 ; 6 females SL 1.7–2.4 mm, 8 males SL 1.6–4.7 mm ( ZRC), stn M25, Danao, Panglao I., 9°33.1′N, 123°44.6′E, 0–1 m, 17.vi.2004 ; 2 females SL 1.8–2.0 mm, 3 males SL 2.5–3.1 mm, 1 indiv. in shell ( ZRC), stn M40, Looc (lagoon inside), Panglao I., 9°35.7′N, 123°44.7′E, 0–3 m, 22 & 28.vi.2004 ; 1 ovig. female SL 2.6 mm, 9 females SL 2.1–6.9 mm, 7 males SL 2.0– 2.5 mm, 2 indivs. in shell ( ZRC), stn R26, Sungcolan Bay, Panglao I., 9°38.4′/38.5′N, 123°49.1/49.4′/49.7′E, 1–5 m, 6, 20, & 30.vi.2004 .

Habitat. Intertidal, reef flats, seagrass beds, and mangroves, on rocky, sandy, and mud-sand substrates.

Remarks. Buitendijk (1937: 258) noted that the syntypes from Bongao in the southern Philippines have stronger tubercles, greater spination, and different colouration from the specimens collected in Indonesia. The morphological characters and colouration of the specimens in this study agree well with the description of the species from Indonesia by Buitendijk (1937). This species can be difficult to separate from the affiliated Clibanarius striolatus with almost the same morphology and colour pattern (see Poupin et al., 2013).

Figures

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.

Fig. 4. A, Dardanus sanguinolentus (Quoy & Gaimard, 1824). Female ovig. SL 6.3 mm, stn R6; B, Dardanus balhibuon, n. sp. Holotype female SL 14.3 mm, stn R38, NMCR 40109, preserved colouration; C, Dardanus megistos (Herbst, 1804). Male SL 11.0 mm, stn M8; D, Dardanus pedunculatus (Herbst, 1804). Male SL 13.4 mm, stn N3; E, Dardanus scutellatus. Male SL 9.8 mm, stn D12; F, Dardanus woodmasoni (Alcock, 1905). Male SL 5.8 mm, stn R76.

Fig. 5. Lateral view of left third pereopod. A, Dardanus lagopodes (Forskål, 1775). Male SL 9.8 mm, stn N2, ZRC 2015.0489; B, Dardanus lagopodes (Forskål, 1775). Female SL 7.6 mm, stn R1, ZRC 2015.0488; C, Dardanus sanguinolentus (Quoy & Gaimard, 1824). Male SL 7.8 mm, stn R38, ZRC 2015.0491; D, Dardanus balhibuon, new species, holotype. Female SL 14.3 mm, stn R38, NMCR 40109. Scale bars = 1 mm.