Download PDF as one large file - AToL Decapoda

Fam ily Alpheidae 203
14. (1) Ocular teeth triangular, not much broader than rostrum, not tapering to slender,
sharp tips 15
Ocular teeth elongate, much broader than rostrum, tapering to slender, sharp tips. 17
15. (14) Rostrum with well-developed ventral process preventing corneas of eyes from
touching; palm of major first chela unarmed distally; merus of third pereopod short
and broad, less than two and one half times as long as broad .... S. curacaoensis
Ventral process of rostrum vestigial or lacking, not preventing corneas of eyes from
touching; palm of major first chela with distal tooth or spine; merus of third
pereopod about four times as long as broad 16
16. (15) Lateral surface of palm of major chela with 2 broad and sinuous lateral lobes, in
addition to sharp superior tooth S. minus
Lateral surface of palm of major chela with narrow, prominent unarmed projection
between superior tooth and 2 broad lateral lobes 5. brevicarpus
17. (14) Dactyli of 3 posterior pairs of pereopods with distal tooth on inferior margin
distinctly divergent from axis of segment and much broader than superior tooth,
inferior margin with prominence proximal to distal tooth (basicerite strongly
spinous dorsally) 18
Dactyli of 3 posterior pairs of pereopods with terminal teeth subparallel, no
prominence on inferior margin proximal to distal tooth 19
18. (17) Proximal prominence on inferior margin of dactyli of 3 posterior pairs of pereopods
low and obtuse S. fritzmuelleri
Proximal prominence on inferior margin of dactyli of 3 posterior pairs of pereopods
large and sharp S. hemphilli
19. (17) Basicerite unarmed dorsally; distal spine on palm of major first chela straight
S. townsendi
Basicerite armed dorsally with strong spine (palm of major first chela armed distally
with curved spine; merus of third pereopod unarmed; dactyli of 3 posterior pairs of
pereopods with distal tooth on inferior margin narrower than superior tooth)
S. apioceros