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CRABS (BRACHYURA) OF THE GULF OF MEXICO

CRABS (BRACHYURA) OF THE GULF OF MEXICO

CRABS (BRACHYURA) OF THE GULF OF MEXICO

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24 Lawrence W. Powers<br />

Remarks: Chace (1940) reported a specimen with rhizocephalan parasites<br />

from off the north coast of Cuba. Listed from several stations of the R/V Oregon<br />

by Chace (1956) in the Gulf of Mexico. Pequegnat (1970) considered this species<br />

to be the most common raninid in the Gulf and he provides some data on<br />

densities at different depths along the continental slope.<br />

Ranilia H. Milne Edwards, 1837<br />

Ranilia conslricla (A. Milne Edwards, 1880) (Bull. Mus. Comp. Zool. 8: 35)<br />

Rathbun, 1937, p. 20, pi. 4, fig. 5, pi. 5, figs. 1, 2; Gomes Correa, 1970, p. 2;<br />

Pequegnat, 1970, p. 180.<br />

Range: Florida Straits; off north coast of Cuba and southeast Gulf of Mexico;<br />

Rio de Janeiro, Brazil; eastern Atlantic, Ascension Island; Senegal to Congo.<br />

Depth: off shallow reef (Rathbun, 1937); 183 to 336 m (100 to 200 fm) in<br />

Gulf of Mexico (Pequegnat, 1970); original type is from 86 m (47 fm), off<br />

Florida.<br />

Habitat: coral reefs; hard bottoms in deep water.<br />

Remarks: Listed from Brazil by Coelho and Ramos (1972). Hartnoll (1971)<br />

cites an observation by Darwin on a species of Ranilia in the southern Atlantic<br />

in which swimming was noted, but the extent to which raninids are able to swim<br />

is not known.<br />

Ranilia muricala H. Milne Edwards, 1837 (Hist. nat. Crust., vol. 2, p. 196)<br />

Hay & Shore, 1918, p. 420, pi. 31, fig. 1; Rathbun, 1937, p. 18, pi. 3, figs. 3-6, pi. 4,<br />

figs. 1-4; WiUiaras, 1965, p. 142, fig. 117.<br />

Range: North Carolina; Bahamas; Florida Straits; southern to northwestern<br />

Florida; Swan Island (Caribbean).<br />

Depth: 9 to 102m (5 to56fm).<br />

Habitat: offshore, on sandy and broken shell substrates.<br />

Remarks: Listed from Florida by Wass (1955), Abele (1970) and Menzel<br />

(1971). Rathbun (1937) listed ovigerous females from North Carolina in September.<br />

This species has been recovered from fish stomachs in North Carolina<br />

offshore waters (Williams, 1965).<br />

Raninoides H. Milne Edwards, 1837<br />

Raninoides lainarcki A. Milne Edwards & Bouvier, 1923 (Mem. Mus. Comp.<br />

Zool. 47: 299)<br />

Ratlibun, 1937, p. 13, text-fig. 8, pi. 1, figs. 3, 4; Chace, 1940, p. 5.<br />

Range: north of Cuba; north of Puerto Rico; off Colon, Panama (Caribbean).<br />

Depth: 46 to 366 m (25 to 200 fm).<br />

Habitat: no data available.<br />

Remarks: Chace (1940) notes an error in plate 2 of Rathbun, 1937: figure 3<br />

is a chela of R. lamarcki and not R. fossor, as the label indicates. The error was<br />

due to a label interchange on figures a and b of Milne Edwards and Bouvier's<br />

(1923) original drawing. Manning (1975) has subsequent^ indicated that R.

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