FISHERY BULLETIN: VOL. 72, NO. 3 



KEY TO SPECIES OF CALLINECTES (EXCLUDING JUVENILES) 



Figures 3-17 



1. Front with two prominent, broad based, triangular teeth between inner orbitals; each 



with or without rudimentary submesial tooth on mesial slope (Atlantic; Western 



Hemisphere, introduced in Europe) sapidus. 



1'. Front with four teeth between inner orbitals, or two prominent lobulate or narrowly 

 triangular teeth separated by a nearly plane space often bearing a pair of rudimentary 

 submesial teeth 2 



2. Submesial pair of frontal teeth well developed and more than half as long as lateral pair 



(measuring from base of lateral notch between teeth) 3 



2'. Frontal teeth decidedly unequal in size, submesial pair no more than half as long as 



lateral pair (measuring from base of lateral notch between teeth), or vestigial .... 8 



3. Four frontal teeth reaching nearly common level 4 



3'. Submesial frontal teeth definitely falling short of lateral pair 7 



4. Four frontal teeth lobulate, not triangular (Pacific; Baja California-Juan Fernandez) toxotes. 

 4'. One or both pairs of frontal teeth triangular 5 



5. Four frontal teeth with rather rounded tips, lateral pair more broadly triangular than 



submesial pair and with mesial side having more oblique slope than lateral side . . 6 



5'. Four frontal teeth acute, lateral pair usually broader than submesial pair (Atlantic; 



Mexican Gulf coast) . . rathbunae. 



6. Anterolateral teeth trending forward, their anterior margins shorter than posterior; 



vestiges of reddish color usually persisting in preserved specimens (except long- 

 preserved ones); distal border of sixth abdominal segment in mature females broadly 



triangular (Atlantic; Caribbean-South America) bocourti. 



6'. Anterolateral teeth directed outward, their tips acuminate and margins shouldered at 

 least in anterior portion of row; vestiges of greenish color usually persisting in 

 preserved specimens (except in long-preserved ones); distal border of sixth abdominal 

 segment in mature females semiellipsoid (Atlantic; Venezuelan estuaries) . . . maracaiboensis. 



7. Granules on ridges and crests of chelae coarse and well separated (Atlantic; Caribbean- 



South America) exasperatus. 



T. Granules on ridges and crests of chelae moderate to fine and closely crowded, often worn 



smooth in adults (Atlantic; West Africa) latimanus. 



8. Carapace remarkably smooth, lines of granules visible but barely perceptible to touch 



(except epibranchial line variably prominent) 9 



8'. Carapace not so smooth, scattered granules and lines of granules quite evident to sight 



and touch 10 



9. Submesial pair of frontal teeth vestigial (Pacific; Baja California and Golfo de California) bellicosus. 

 9'. Submesial pair of frontal teeth small but definitely formed (Atlantic; United States-Gulf 



of Mexico) similis. 



10. Carapace coarsely granulated; all anterolateral teeth except first two curved forward, 



without shoulders (Atlantic; Bermuda-Florida-South America- West Africa) .... marginatus. 

 10'. Carapace finely granulated; only last or last two anterolateral teeth curved forward, 



remainder with shoulders 11 



11. Submesial pair of frontal teeth absent or vestigial (Atlantic; Bermuda-North America- 



South America) ornatus. 



11'. Submesial pair of frontal teeth never vestigial, but no more than half length of lateral 



pair 12 



12. Lateral spine almost always less than three times length of preceding anterolateral 



tooth; tips of anterolateral teeth forming a decided arc; males with distal portion of 



first gonopods almost straight 13 



720 



