Clibanarius antennatus Rahayu and Forest, 1992

Rahayu, D. L., 2003, Hermit crab species of the genus Clibanarius (Crustacea: Decapoda: Diogenidae) from mangrove habitats in Papua, Indonesia, with description of a new species, Memoirs of Museum Victoria 60 (1), pp. 99-104 : 100

Clibanarius antennatus Rahayu and Forest

Clibanarius antennatus Rahayu and Forest, 1992: 755 , figs 2c,

3e, f.

Material examined. Sungai Kamora, sandy mud, 8 Jun 2000, 10 males, 3.0– 3.8 mm, 8 females (6 ovigerous), 2.8–3.5 mm ( PTFI), and 11 Jul 2001, 2 males, 3.3, 3.6 mm, 10 females (5 ovigerous), 2.7–3.42 mm, D.L. Rahayu ( RCO 0103 ) .

Diagnosis. Shield longer than broad. Ocular peduncles stout, shorter than shield, cornea inflated, diameter 0.3 of peduncles; ocular acicles with 1 or 2 denticles. Antennal and antennular peduncles reaching middle of cornea; antennal acicles short, reaching slightly beyond middle of fourth peduncular segment. Chelipeds subequal, right cheliped longer and broader than left; dorsolateral faces of propodi covered with dark tipped conical tubercles, dorsal margins of carpi each with 3 acute spines. Dactyls of second and third pereopods notably arched, 1.5 to 1.8 longer than propodi.

Colour in life. Shield mottled light blue or bluish-white and dark brown. Ocular peduncles bluish-white, dorsal surface with 1 thin, brown coloured, interrupted longitudinal stripe. Antennular peduncles transparent bluish-white. Antennal peduncles brown with white longitudinal stripe on dorsal surface of fourth and fifth segments; first and second segments dark brown; antennal acicles dark brown with white spines. Chelipeds brown with blue spines; tips of fingers light brown or whitish-orange. Second and third pereopods bluish-white or light blue with brown longitudinal stripes over entire length; meri with 2 stripes; carpi with 3 stripes; propodi with 4 stripes: 1 very narrow stripe on dorsal margin, 1 broader and 1 narrower median stripe with distal and proximal parts broadened and 1 narrow, interrupted stripe on ventral margin; dactyls with 2 interrupted stripes.

Distribution. Barombong, South Sulawesi, Indonesia (type locality), now extended eastwards to south coast of Papua.

Remarks. Morphological characters and colour pattern of Papua specimens agree well with Rahayu and Forest’s (1992) description of Clibanarius antennatus except for the number of longitudinal stripes on the carpi and propodi of the second and third pereopods. Their colour description was based on material preserved in alcohol, possibly faded, leaving only two stripes on the carpi of the pereopods (there are three stripes in the live animal), and no interrupted stripe on the ventral margins of the propodi (there is an interrupted stripe in the live animal).