| Abstract |
Two families, one new, and seven subfamilies, six new, are recognized for taxa previously assigned to the Callianassidae.The new family, Ctenochelidae, includes those taxa having a cardiac prominence on the carapace and an appendix masculina on male Plp2 and lacking a dorsal plate on the uropodal exopod.Three new ctenochelid subfamilies are recognized: Ctenochelinae, for the genera Ctenocheles, Gourretia, Paracalliax, and the new genus Dawsonius, all of which lack a dorsal oval on the carapace and have a slender propodus and dactylus on Mxp3, Plp2-5 similar in size and shape, and finger-like appendices internae on Plp3-5; Anacalliinae, containing only Anacalliax, which has a dorsal oval, a slender propodus and dactylus on Mxp3, and Plp1-2 different from Plp3-5, with Plp3-5 having stubby appendices internae; and Callianopsinae, containing only Callianopsis, which has a dorsal oval, an ovate propodus and dactylus on Mxp3, and Plp2-5 similar, with finger-like appendices internae.The family Callianassidae is restricted to those genera lacking both a cardiac prominence on the carapace and an appendix masculina on male Plp2, and which have a dorsal plate on the uropodal exopod.The nominate subfamily includes six genera with a dorsal oval on the carapace, a slender propodus and dactylus on Mxp3, and stubby appendices internae on Plp3-5: Callianassa, Trypaea, and Calliapagurops, a genus of uncertain position, and three new genera recognized here for American species: Biffarius, Neotrypaea, and Notiax.Three new callianassid subfamilies are recognized: Callichirinae, comprising five genera, Callichirus, Corallianassa, Glypturus, Lepidophthalmus, and Neocallichirus, which have a dorsal oval on the carapace, an ovate propodus and slender dactylus on Mxp3, and stubby appendices internae on Plp3-5; Eucalliinae, for Calliax and the new genus Eucalliax, which lack a dorsal oval on the carapace and have an ovate propodus and dactylus on Mxp3 and finger-like appendices internae on Plp3-5; and Cheraminae, for Cheramus and Scallasis, which have a dorsal oval, a slender propodus and dactylus on Mxp3, and slender Plp3-5, each with a finger-like appendix interna. |
