Dardanus pedunculatus
Creators: name: Malay, Maria Celia (Machel) D.
name: Rahayu, Dwi Listyo
name: Chan, Tin-Yam
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Diogenidae
Dardanus
Dardanus pedunculatus

description: Dardanus pedunculatus (Herbst, 1804)
(Fig. 4D)
Cancer pedunculatus Herbst 1804: 25, pl. 61, Fig. 3 (type locality unknown).
Pagurus asper – Estampador, 1937: 502; Yap-Chiongco, 1938: 197; Estampador, 1959: 50.
Pagurus haani – Fize & Serène, 1955: 207–214, Figs. 32–33 A–B, pl. 4 no. 7.
Dardanus pedunculatus – Haig & Ball, 1988: 166; Cassidy, 2005: 114–116, Figs. 15–16; McLaughlin et al., 2007: 83–84, 2 unlabelled figures.
Material examined. 1 male SL 16.8 mm (ZRC), stn N2, Alona Reef, Panglao I., 9°32.9′N, 123°46.6′E, 12 m, 7.vi.2004; 2 females SL 8.4–11.0 mm, 4 males SL 5.7–13.4 mm (ZRC), stn N3, Alona Reef, Panglao I., 9°32.9′N, 123°46.6′E, 25–30 m, 7.vi.2004; 3 females SL 10.2–15.2 mm, 4 males SL 8.3–14.0 mm (ZRC), stn N5, Alona Reef, Panglao I., 9°32.9′N, 123°46.9′E, 20–35 m, 10.vi.2004; 1 ovig. female SL 15.6 mm, 1 female SL 12.9 mm (ZRC), stn N8, Tawala, Panglao I., 9°32.8′N, 123°46.6′E, 32–55 m, 14.vi.2004; 1 ovig. female SL 13.0 mm, 2 males SL 6.5–12.0 mm (ZRC), stn N10, Tawala, Panglao I., 9°33.0′N, 123°46.8′E, 35–60 m, 21.vi.2004; 1 female SL 13.1 mm (ZRC), stn N12, lagoon off Poblacion, Panglao I., 9°34.2′N, 123°43.2′E, 1–2 m, 24.vi.2004; 1 male SL 2.7 mm (ZRC), stn R5, Catarman, Panglao I., 9°36.6′N, 123°52.4′E, 5–16 m, 31.v.2004; 1 female SL 9.2 mm (ZRC), stn R13, Doljo Point, Panglao I., 9°35.6′N, 123°43.2′E, 2–41 m, 2.vi.2004; 1 male SL 15.4 mm (ZRC), stn R31, Pamilacan I. southsouthwest slope, 9°29.4′N, 123°56.0′E, 10–41 m, 8.vi.2004; 1 male 11.5 mm (ZRC), stn R37, Momo Beach, Panglao I., 9°36.5′N, 123°45.6′E, 28−32 m, 10.vi.2004; 1 ovig. female SL 19.0 mm (ZRC), Balicasag I., vii.2003.
Habitat. Subtidal, 2 to 60 m deep, reef slopes, on coralline substrates; associated with anemones.
Remarks. At first glance, D. pedunculatus resembles D. deformis, and D. gemmatus in that all 3 species are associated with anemones and have similar white- and redbanded ocular peduncles. Dardanus pedunculatus can be distinguished from D. gemmatus on the basis of the outer surface of the left cheliped: in D. pedunculatus the lower half of the left chela is smooth, while in D. gemmatus the entire outer surface of the left chela is covered with tubercles. The lateral surface of the left cheliped of D. pedunculatus and D. deformis resemble each other more closely, but the two species differ in the morphology of the left third pereopod: the dactyl and propodus of the left third pereopod in D. deformis are considerably broader than the right third pereopod (pereopods are more symmetrical in D. pedunculatus); and in D. pedunculatus the lateral face of the dactyl shows a strong carina in the proximal half, which is absent in D. deformis.
description: Published as part of 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), pp. 23-65 in Raffles Bulletin of Zoology 66 on page 51, DOI: 10.5281/zenodo.4503028