Chalixanthura 27 



armed. Pereonite 7 less than half length of pereonite 6. Pereopods 4-7, carpi 

 with free anterior margin shorter than posterior margin. Pleonites 1-5 fused, 

 6 fused with telson. Pleopod 1, both rami forming operculum. 



Apanthuroides millae Menzies and Glynn, 1968 

 Figure 8 



DIAGNOSIS 9 : 4.5 mm. Integument with diffuse brown pigmentation and 

 numerous shallow pits. Antennular flagellum of four articles. Antennal 

 flagellum of seven articles. Pleotelson with strong middorsal ridge. 6: 5.0 

 mm. Integumental pigment stronger than in 9, in irregular brown patches. 

 Eyes larger than in 9 . Antennular flagellum of six or seven articles. Antennal 

 flagellum of seven articles. Pereopod 1, propodal palm armed with five 

 fringed spines. 



RECORDS Carrie Bow Cay, intertidal to 30 m; Puerto Rico, intertidal. 



REMARKS The highly modified mandible probably indicates some spe- 

 cialized form of feeding, but this has yet to be discovered. 



Chalixanthura Kensley, 1984 



DIAGNOSIS Eyes present, enormously enlarged, especially ventrally in 6 , 

 resulting in mouthpart reduction. Mandibular palp of three articles; molar 

 small, lamina dentata, and incisor present. Mouthparts reduced in S . Per- 

 eopods 1-3 similar, propodi barely inflated. Pereopods 4-7, carpi triangular. 

 Pleopod 1, exopod broader than endopod, operculiform, or both rami form- 

 ing operculum. Pleopods 2-5, exopods biarticulate. Pleonites short, free, 

 longer in 6 than in 9 . Uropodal rami, margins moderately to strongly in- 

 cised or serrate. Telsonic margin serrate posteriorly; statocysts lacking. 



Key to species of Chalixanthura 



1. Body pigmented; uropodal exopod deeply incised scopulosa 



Body not pigmented; uropodal exopod weakly serrate lewisi 



