Clibanarius merguiensis De Man, 1888

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 : 35

Clibanarius merguiensis De Man, 1888

( Fig. 3B )

Clibanarius aequabilis var. merguiensis De Man, 1888: 247 (Mergui Archipelago, Burma, type locality)

Clibanarius merguiensis – Fize & Serène, 1955: 145–150, Fig. 22; Cassidy & McLaughlin, 1997: 85–87, Fig. 4 ; Rahayu & Forest, 1993 (1992): 774, Fig. 7 ; Rahayu & Komai, 2000: 27–28; McLaughlin et al., 2007: 133–134, 2 unlabelled figures.

Material examined. 1 ovig. female SL 2.1 mm, 2 males SL 1.4–3.4 mm ( 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 2.6 mm, 1 damaged male unmeasured ( ZRC), stn M7, Momo Beach, Panglao I ., 9°36.1′N, 123°45.2′E, 0–3 m, 1.vi.2004; 1 female SL 2.6 mm, 2 males SL 2.5–3.7 mm ( ZRC), stn M8, Doljo, north coast, Panglao I ., 9°35.4′N, 123°44.3′E, 0–1 m, 2.vi.2004; 2 ovig. females SL 2.3–2.5 mm, 6 males SL 1.6–3.6 mm ( ZRC), stn M11, Sungcolan Bay, Panglao I ., 9°38.3′N, 123°49.6′E, 0–3 m, 6.vi.2004; 1 female not measured, 4 damaged indivs. ( ZRC), stn M15, Baclayon, Bohol I ., 9°37.2′N, 123°55.4′E, 0–1 m, 9.vi.2004; 2 males SL 3.1–4.0 mm ( ZRC), stn M24, Manga, Panglao I ., 9°42.1′N, 123°51.3′E, 0–1 m 17.vi.2004; 2 ovig. females SL 1.8–2.3 mm, 3 females SL 1.2–1.9 mm, 3 males SL 1.5–3.0 mm ( ZRC), stn M25, Danao, Panglao I ., 9°33.1′N, 123°44.6′E, 0–1 m, 17.vi.2004; 3 ovig. females SL 2.8–2.9 mm, 3 females SL 1.2–2.2 mm, 17 males SL 1.5–3.5 mm, 1 indiv. in shell ( ZRC), stn M51, Mayacabac, Panglao I ., 9°36.8′N, 123°52.2′E, 0 m, 30.vi.2004; 1 male SL 3.4 mm ( ZRC), stn R53, Sungcolan Bay, Panglao I ., 9°38.4′N, 123°49.7′E, 3–5 m, 20.vi.2004.

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

Remarks. The variation of colour pattern on the second and third pereopods of Cl. merguiensis showed by Rahayu & Forest (1993) is also present in the material studied here.

Figures

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. 7. Dardanus balhibuon, new species, holotype. Female SL 14.3 mm, stn R38, NMCR 40109. A, Left cheliped, outer view; B, Left cheliped, inner view; C, Right cheliped, outer view; D, Right cheliped, inner view. Scale bars = 1 mm.