WILLIAMS: CRABS OF THE GENUS CALLINECTES 



diacanthus) .- R. Rathbun, 1884, 1893, p. 

 775, pi. 267.- Young, 1900, p. 187 (var. of C. 

 diacanthus). 



?Neptunus hastatus.- Brocchi, 1875, p. 55, pi. 16, 

 fig. 81. 



Neptunus (Callinectes) diacanthus.- Ortmann, 

 1894, p. 77 (part: specimens g, Florida; 1, 

 Brazil; n, Haiti). 



Callinectes sapidus Rathbun, 1896, p. 352, pi. 12; 

 pi. 24, fig. 1; pi. 25, fig. 1; pi. 26, fig. 1; pi. 27, 

 fig. 1 (type locality restricted to "east coast 

 ofUnited States" by Williams, 1965).- 1929, 

 p. 31, fig. 41.- 1930, p. 99, text-figs. 15a, 16c, 

 17c, 18a, 19, pi. 47.- Bouvier, 1901, p. 16.- 

 Clark, 1906, p. 172, pi. 41, figs. 1-3 (fossil).- 

 Verrill, 1908a, p. 370, text-figs. 22a, 23a, 24, 

 pi. 17, fig. 2.- Hay and Shore, 1918, p. 432, pi. 

 35, fig. 1.- Chace, 1940, p. 33.- Chace and 

 Hobbs, 1969, p. 133, figs. 36, 37f.- Balss, 

 1957, p. 1641.- Holthuis, 1961, p. 50, pi. 1, 

 fig. 2, pi. 2, fig. 2.- 1969, p. 34, pi. 1.- Hol- 

 thuis and Gottlieb, 1955, p. 91, pi. 3, fig. 

 11.- Pounds, 1961, p. 42, unnumbered col. 

 frontis., unnumbered text-fig. p. 9, text-figs. 

 1-2, pi. 7, figs. 1, 2a.- Futch, 1965, p. 2, figs. 1, 

 2, 3, 4, 5c.- Williams, 1965, p. 168, fig. 151.- 

 Christiansen, 1969, p. 72, fig. 29.- Taissoun, 

 1969, p. 37, photos 3-6, figs. IIA-D.- 1973, p. 

 34, figs. 4E, 5F, photo 5. 



Callinectes sapidus acutidens Rathbun, 1896, p. 

 354, pi. 13; pi. 24, fig. 2 (type: ^, MCZ 4696, 

 Santa Cruz [Estado de Bahia] Brazil, 

 Thayer Exped.).-1901, p. 47.- 1930, p. Ill, 

 text-fig. 15 c, pi. 48.- 1933, p. 48.- Young, 

 1900, p. 191.- Contreras, 1930, p. 228, fig. 1.- 

 Pretzmann, 1966, p. 305, 2 pis.- Bulgurkov, 

 1968, fig. 1. 



Callinectes africanus.- A. Milne Edwards and 

 Bouvier, 1900, pi. 4, fig. 5 (not p. 71, var. of 

 C diacanthus = C. marginatus). 



Description. — Carapace (Figures 16, 17) bear- 

 ing two broad either obtuse or acuminate, triangu- 

 lar frontal teeth with mesial slopes (incorporating 

 a pair of rudimentary submesial teeth) longer 

 than lateral slopes. Metagastric area with pos- 

 terior width approximately 1.2 times length, an- 

 terior width about 2 times length. Anterolateral 

 margins slightly arched; anterolateral teeth ex- 

 clusive of outer orbital and lateral spine obtuse to 

 acuminate and directed outward more than for- 

 ward. Much of surface smooth, with scattered 

 granules, but granules concentrated locally on 



mesobranchial, posterior slope of cardiac, and 

 anterior portion of mesogastric area; a tendency to 

 crowding of granules into transverse ridge at 

 summit of cardiac and mesobranchial area in 

 some individuals. Sculpturing of surface varying 

 individually from low to raised relief. Lateral 

 spines varying from rather stout, blunt, and 

 forward trending to slender, elongate, and slightly 

 backward trending. Epibranchial line nearly 

 straight over branchial region, otherwise sinu- 

 ously curved. 



Propodus and carpus of chelipeds with moderate 

 finely granulate ridges, width of chelae similar, 

 propodal finger of major hand occasionally with 

 lower margin decurved proximally. 



Male abdomen and telson reaching about mid- 

 length of thoracic sternite IV; telson lanceolate, 

 much longer than broad; sixth segment of abdo- 

 men broadened distally. Mature female abdomen 

 and telson reaching about midlength of thoracic 

 sternite IV; telson with inflated sides almost 

 equilaterally triangular, fifth and sixth abdomi- 

 nal segments equal in length. First gonopods of 

 male (Figures 19d, 21) very long, reaching beyond 

 suture between thoracic sternites IV and V but not 

 exceeding telson; sinuously curved and overlap- 

 ping proximally, diverging distally, twisting 

 mesioventrally on axis lateral to abdominal lock- 

 ing tubercle and recurving to termination near 

 midline; armed distally with row of large and 

 small retrogressive spinules following ventral and 

 lateral borders with twist of axis; tip membran- 

 ous, flared portion suggesting an elongate quad- 

 rilateral in outline. Gonopores of female (Figure 

 23b, c) paraboloid in outline with apex on long axis 

 directed anteromesad, aperture of each sloping 

 from surface on mesial side under irregularly 

 rounded and linearly wrinkled anterior border 

 superior to bulbous posterolateral border. 



Size of carapace in mm. — Largest male: length 

 91, width at base of lateral spines 168, including 

 lateral spines 209. Largest female: length 75, 

 width at base of lateral spines 143, including 

 lateral spines 204. Mature size of females varies 

 considerably, the smallest examined having a 

 carapace length of 21, width at base of lateral 

 spines 41, including lateral spines 55. Summary of 

 selected measurements is given in Tables 1 and 2. 



Pretzmann (1966) discussed a large immature 

 female with acute spines: length 65, width 132.5. 

 The largest immature female I have seen, also 

 with fairly acute spines, reached a carapace 



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