Clibanarius ambonensis Rahayu & Forest, 1993

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 : 31-32

Clibanarius ambonensis Rahayu & Forest, 1993

( Fig. 2B )

Clibanarius ambonensis Rahayu & Forest, 1993 (1992) : 753, Figs. 2b , 3c, d ( Ambon, Indonesia, type locality); Rahayu, 2003: 99–100; Osawa & Fujita, 2008: 2–7, Figs. 1–4 ; Rahayu & Setyadi, 2009: 18, unnumbered figure.

Material examined. 1 male SL 4 mm ( ZRC), stn M16, Sungcolan inlet, Panglao I., 9°38.2′N, 123°50.3′E, 0–1 m, 9.vi.2004 ; 3 males SL 2.5–3.0 mm ( ZRC), stn M27, north of Abatan River , Bohol I., 9°43.6′N, 123°51.2′E, 0–1 m, 23.vi.2004 ; 3 females S: 5.5–6.5 mm, 4 males SL 4.2–6.3 mm ( ZRC), stn M29, Abatan River , Bohol I., 9°44.7′N, 123°55.2′E, 0–1 m, 23.vi.2004 ; 1 ovig. female SL 2.9 mm, 4 males SL 2.8–3.1 mm, 5 indivs. in shell ( ZRC), stn M30, mouth of Abatan River , Bohol I., 9°43.1′N, 123°51.5′E, 0–1 m, 24.vi.2004 ; 2 females SL 2.3–2.7 mm, 1 male SL 2.3 mm, 1 indiv. in shell ( ZRC), stn M31, Abatan River , Bohol I., 9°43.0′N, 123°52.2′E, 0–1 m, 24.vi.2004 ; 3 males SL 3.9–7.0 mm ( ZRC), stn M37, north of Cortes Bridge, Abatan River , Bohol I., 9°44.8′N, 123°55.5′E, 0–2 m, 26.vi.2004 ; 2 males SL 2.5–3.2 mm ( ZRC), stn M40, Looc (lagoon inside), Panglao I., 9°35.7′N, 123°44.7′E, 0–3 m, 22 & 28.vi.2004 .

Habitat. Intertidal, in estuarine river habitats, mangroves and nipa palms.

Remarks. Although the colour of the specimen in this study ( Fig. 2B ) is dark brown, much darker than the specimens studied by Osawa & Fujita (2008) and Rahayu & Setyadi (2009), the morphological characters agree well with the description of the species. This is the first report of this species from the Philippines.

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. 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. 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.