WILLIAMS: CRABS OF THE GENUS CALLINECTES 



Habitat. — Specimens available for study came 

 from estuarine waters of ditches, lagoons, and 

 river mouths, the type of environment reported by 

 Manrique Colchado (1965) as coastal lagoons of 

 varying salinity at depths of 1-3 m. 



Spawning . — Although mature females are rep- 

 resented in the small study collection, none are 

 ovigerous. 



Remarks. — Apparently an isolate of C bocourti 

 stock confined to the western and southwestern 

 Gulf of Mexico, C. rathbunae has various an- 

 gularities on the body and legs more accentuated 

 than in C. bocourti: 1) acute frontal spines con- 

 trasted with more rounded or lobate frontal spines 

 (excepting juvenile C. rathbunae from Tamauli- 

 pas having rounded lobate frontals); 2) all antero- 

 lateral teeth acute (or acuminate) rather than 

 anterior portion of series being rounded at tips; 

 and 3) hand of chelae moderately ridged rather 

 than smoothly rounded. First gonopods of mature 

 male C. rathbunae are not crossed at the tips and 

 fall a bit short of the telson tip whereas in mature 

 C. bocourti they are crossed at the tips and 

 slightly exceed the telson. 



Specimens of neither species from Yucatan are 

 available, thus areas of possible intergradation 

 between seemingly close relatives have not been 

 studied. 



Material. — Total: 10 lots, 18 specimens. 



USNM. 4 lots, 10 specimens. 



MEXICO 



Tamaulipas: 122925. Rio Soto la Marina at Soto 

 la Marina, 21 Jan. 1959, 1 9 (juv), R. R. Miller and 

 R. J. Schultz, M59-1. 



Veracruz: 122922, Laguna de Alvarado, 27 Apr. 

 1966, 1 <? , 2 9, S. de la Campa, E. Ramirez and E. 

 Chavez, L. B. 5093. 122923, Laguna de Pueblo 

 Viejo off the corals, 4 Sept. 1964, 1 <J , 1 9, J. A. 

 Macias, L. B. 3333. 122924, Rio Tuxpan, taken 

 between Cobos and the Estero Quetumilco, 21 

 Nov. 1964, 2 0, 2 9, R. Marquez, L. B. 3632. 



A<5 with carapace 30 mm long collected from Rio 

 Grande by Trevino and sent to USNM for 

 identification by H. Hildebrand, 4 Sept. 1956; 

 identified by F. A. Chace, Jr., and returned to 

 sender. 



AHF. 2 lots, 3 specimens. 



MEXICO 



Veracruz: Boca del Rio, seined in shallow water, 

 9 Aug. 1949, 1 5, 1 9, B. W. Halstead. Drainage 

 ditch 5 mi W Veracruz, seined in brackish water, 

 19 Aug. 1949, 1 9 (juv), B. W. Halstead. 



BMNH. 1 lot, 1 specimen. 



MEXICO 



65.29, 1 9, (dry), vi/7. 



RMNH. 1 lot, 2 specimens. 



MEXICO 



Veracruz: 21814, Laguna de Pueblo Viejo, 25 

 Apr. 1964, 1 ^, 1 9, F. A. Manrique Colchado. 



Instituto Nacional de Investigaciones Biologico 

 Pesqueras, Mexico, D. F. 2 lots, 2 specimens. 



Tamaulipas: Laguna del Chairel y rio Tamesi, 

 18 Aug. 1964, 1 cJ , J. A. Macias. Veracruz: Estero 

 Jacome, 18 Dec. 1963, 1 9 (juv), S. Garcia. 



Supplementary literature record. — Mouth of Rio 

 Grande, Tex. (Pounds, 1961). 



CALLINECTES MARACAIBOENSIS 

 TAISSOUN 



Figures 14, 19b, 20o, 221, 27 



Callinectes sp., Taissoun, 1969, p. 63, fig. 23, photo 

 8. 



Callinectes maracaiboensis Taissoun, 1962, p. 12, 

 23, figs, le-h, 2 (part), 3 (part), 4, 9B, lOA-B; 

 photos 1-2 (col.), 3, 4m (type: i, Museo de 

 Ciencias Naturales, Caracas, Venezuela, 

 Lago de Maracaibo, Venezuela).- 1973, p. 

 28, figs. 4F, 5E, photo 3. 



Description. — Carapace (Figure 14) bearing 

 four triangular frontal teeth with tips meeting a 

 nearly common level, lateral pair moderately 

 acute with mesial side having a flatter angle than 

 lateral side, submesial pair much narrower, acute, 

 sometimes slightly shorter than lateral pair. 

 Metagastric area with length and posterior width 

 about equal, anterior width 2 times length. An- 

 terolateral margins slightly arcuate, teeth exclu- 

 sive of outer orbital and lateral spine with tips 

 directed outward, tending to be acuminate espe- 

 cially in outer portion of row, posterior margin of 

 teeth usually longer than and more granulate 



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