Cherusius triunguiculatus ( Borradaile, 1902 )

Boyko, Christopher B., Mendoza, Jose C. E. & Castro, Peter, 2017, New records of coral-associated crabs (Decapoda: Brachyura: Carpilioidea, Trapezoidea) from Easter Island, Zootaxa 4216 (5), pp. 487-494 : 488

Cherusius triunguiculatus ( Borradaile, 1902)

( Fig. 1 A)

Material examined. 1 male (4.7 mm × 3.7 mm), 1 female (6.1 mm × 4.6 mm), Piko , Easter Island, coll. C. B. Boyko & S. Reanier, 31 August 1999 ( ZRC 2016.0121 ) .

Geographical distribution. Indo-West Pacific and Tropical Eastern Pacific regions ( Castro 2011).

Remarks. Low & Ng (2012) introduced Cherusius as a replacement name for the preoccupied Jonesius Sankarankutty, 1962 . This is the first record of the species from Easter Island. It is considered an obligate symbiont of scleractinian corals ( Castro 2015).

Figures

FIGURE 1. Live coloration of trapezioid crabs from Easter Island. A, Cherusius triunguiculatus (Borradaile, 1902), male (4.7 mm × 3.7 mm) (ZRC 2016.0121). B, Domecia hispida Eydoux & Souleyet, 1842, female (5.9 mm × 4.6 mm) (ZRC 2016.0122). C, Trapezia punctimanus Odinetz, 1983, male (12.2 mm × 10.6 mm) (ZRC 2016.0123). D, T. punctimanus, male (6.5 mm × 5.6 mm) (ZRC 2016.0124). E, Trapezia septata Dana, 1852? male (9.5 mm × 8.0 mm) (ZRC 2016.0125).