Percnon abbreviatum (Dana 1851)

Percnon abbreviatum (Dana, 1851)

Acanthopus abbreviatus Dana, 1851:252.

Percnon abbreviatum.— Crosnier, 1965:88, figs. 134,139,143,149.

MATERIAL.—Manning 1971 Collection: Sta 21, English Bay: 1 female [11.0].

Smithsonian 1976 Collection: Sta 1B–76, McArthur Point: 1 male [8.0], 1 female [7.0].—Sta 1C–76, McArthur Point 3 females [7.2–12.6], 1 ovig. [12.6].

Operation Origin: Site 31, Spire Rock, from under a stone, 10 m: 1 female [11.8].

Other Collections: Jourdan (1976), off Collyer Point,~20 ft [6 ml; 1 female [8.3].

SIZE.—Carapace lengths of male, 8.0 mm; of females, 7.0–12.6 mm; of ovigerous female, 12.6.

COLOR.—Mottled dark brown and whitish; cornea red; walking legs conspicuously banded, darker bands brown or reddish.

HABITAT.—Intertidal and shallow sublittoral. Specimens were taken from coralline algae and from a rock wash, both intertidal, and in 6 meters and in 10 meters under a stone.

This is the first Atlantic record for this species, which, so far as we can determine is the only pantropical brachyuran.

DISTRIBUTION.—Pantropical; Indo-West Pacific from Hawaii, Samoa, Tahiti, and Madagascar; eastern Pacific from Clipperton Island (Garth, 1965); and now central Atlantic from Ascension; intertidal.