Calcinus morgani Rahayu & Forest, 1999

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 : 29

Calcinus morgani Rahayu & Forest, 1999

( Fig. 1H )

Calcinus morgani Rahayu & Forest, 1999: 465 , Figs. 1B , 2C, D, G, H, J (Sidangoli, Halmahera, Indonesia, type locality); Asakura, 2002: 43–48, Figs. 9 –11, Fig. 21E–I; McLaughlin et al., 2007: 159–161, 3 unlabelled figures; Malay & Paulay, 2010: Appendix S1.

Calcinus gaimardii – Haig & Ball, 1988: 159; Poupin 1997: 688– 690, Figs. 2B , 5D ; Morgan, 1991: 876–878, Fig. 11 (in part, form II) [not Calcinus gaimardii (H. Milne Edwards, 1848) ].

Calcinus gaimardi – Wooster, 1984: 131–133 (misspelling of Calcinus gaimardii ).

Calcinus areolatus Rahayu & Forest, 1999: 468–471 , Fig. 4 ( Ambon, Indonesia, type locality).

Material examined. 2 ovig. females SL 4.0– 6.5 mm, 5 females SL 3.0– 4.4 mm, 8 males SL 1.8–7.0 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 ovig. female SL 4.8 mm ( ZRC), stn M2, west end of Alona Beach , Panglao I., 9°32.8′N, 123°45.9′E, 0–2 m, 30.v.2004 ; 1 male SL 3.6 mm ( ZRC), stn M2, west end of Alona Beach , Panglao I., 9°32.8′N, 123°45.9′E, 0–2 m, 30.v.2004 ; 2 females SL 2.5–4.0 mm ( ZRC), stn M3, Danao , Panglao I., 9°32.5′/33.1′N, 123°44.7′/45.5′E, 0–2.5 m, 31.v.2004 ; 1 ovig. female SL 6.4 mm, 1 female SL 3.4 mm, 1 male SL 5.5 mm, 1 indiv. in shell ( ZRC), stn M5, Doljo Point , Panglao I., 9°35.5′N, 123°43.3′/44.3′E, 0–2 m, v.2004 to vi.2004; 1 female SL 6.3 mm ( ZRC), stn M18, Gak-Ang Islet , off Panglao I., 9°33.0′N, 123°45.5′E, 0–1 m, 10 & 12.vi.2004 ; 3 females SL 2.7–5.8 mm ( ZRC), stn M20, Pamilacan I., 9°29.3′N, 123°55.1′E, 0–2 m, 13.vi.2004 ; 1 ovig. female SL 9.5 mm, 2 males SL 3.0– 6.5 mm ( ZRC), stn M22, Napaling , Panglao I., 9°37.2′N, 123°46.4′E, 0–3 m, 15.vi.2004 ; 1 male SL 6.5 mm ( ZRC), stn M58, Balicasag I., 9°31.3′N, 123°41.0′E, depth unknown, 4.vii.2004 ; 1 male SL 5.8 mm ( ZRC), stn R11, Biking , Panglao I., 9°35.2′N, 123°50.5′E, 4 m, 2.vi.2004 ; 10 indivs. in shell ( ZRC), stn R20, Cathedral , 9°31.1′N, 123°41.5′E, 7–48 m, 5.vi.2004 ; 1 ovig. female SL 5.6 mm, 1 female SL 5.0 mm ( ZRC), stn R24, Bingag , Panglao I., 9°37.5′N, 123°46.8′E, 0–2 m, 6.vi.2004 ; 1 ovig. female SL 4.0 mm ( ZRC), stn R59, Momo Beach , Panglao I., 9°36.2′N, 123°44.9′E, 2–20 m, 22.vi.2004 ; 1 male SL 5.3 mm ( ZRC), stn R61, between Sao and San Isidro, Panglao I., 9°34.3′N, 123°49.3′E, 4–22 m, 23.vi.2004 ; 1 ovig. female SL 5.1 mm, 3 males SL 4.9–5.7 mm ( ZRC), stn R73, Balicasag I., 9°30.9′N, 123°40.8′E, 2–30 m, 2.vii.2004 ; 1 male SL 5.2 mm ( ZRC), stn S42, Pamilacan I., 9°30.1′N, 123°55.5′E, 15–20 m, 1.vii.2004 .

Habitat. Intertidal to subtidal, 0 to approximately 12 m, reef flats, slopes, and ledges, on coralline, sandy, and mixed substrates.

Remarks. Calcinus morgani closely resembles and is easily mistaken for C. gaimardii (see remarks under C. gaimardii ).

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. 9. Maximum likelihood phylogram based on COI mitochondrial DNA sequences. Branch support for the major clades are indicated above (= likelihood bootstrap values) and below (= Bayesian posterior probabilities) the branches. Bootstrap values <70% were not reported.

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.

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.