Micropagurus devaneyi McLaughlin 1986

Celia, Maria, Malay, D., Miller, Allison K. & Komai, Tomoyuki, 2021, Hermit crabs (Crustacea: Decapoda: Anomura: Paguroidea) of the Northern Marianas, including new records and an updated checklist, Micronesica 2021 (1), pp. 1-29 : 13

Micropagurus devaneyi McLaughlin 1986

Fig. 4f

Material. 1 male, SL 1.8 mm ( UF 7437 ), Saipan Island , station NM-08 .

Remarks. The sole male specimen is provisionally identified as M. devaneyi McLaughlin 1986 . Asakura (2005) distinguished M. devaneyi from the very similar M. propinquus Asakura 2005 on the basis of the number of spines on the ventral margins of the dactyls of the pereopods. In the specimen from the Marianas, 2–4 spines are present, fitting M. devaneyi (vs. 4–7 spines in M. propinquus ). The general armature of the chelipeds of M. devaneyi is described by Asakura (2005) as less pronounced than that of M. propinquus , which appears to be the case for the Marianas specimen based on a comparison of illustrations of M. devaneyi by McLaughlin (1986, fig. 4b, 4c) vs. the illustration of M. propinquus by Asakura (2005, figs. 4-5). Our specimen has solid red ocular peduncles (similar to M. devaneyi , while the coloration of M. propinquus is unknown). However, the specimen is similar to M. propinquus in having 1 strong spine and 1 small spine on the lateral margin of the merus of the left cheliped (see Asakura 2005, fig. 5C). Close comparison with the holotypes is needed to confirm the provisional identification. Micropagurus devaneyi is so far known from the Hawaiian Islands ( McLaughlin 1986; Asakura 2005), so this represents a new record for the Northern Marianas and a considerable range extension for the species.

Figures

Fig. 4. A: Dardanus jacquesi Asakura and Hirayama, 2002, Pagan Island (SIO-BIC C14509). B: Dardanus lagopodes (Forskål, 1775), juvenile, Pagan Island (SIO-BIC C14505). C: Dardanus megistos (Herbst, 1804), between Guguan and Alamagan Islands (SIO-BIC C14244). D: Dardanus pedunculatus (Herbst, 1804), Agrihan Island (SIO-BIC C14212). E: Dardanus sanguinolentus (Quoy & Gaimard, 1824) Saipan Island (SIO-BIC C14507; recently preserved). F: Micropagurus devaneyi McLaughlin, 1986, Saipan Island (UF 7437).