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Abstract
The distinctive characteristics of every genus and species belonging to, or related to, the family, Whaitsiidae, are described. Special attention is given to interrelationship. Ten genera and twenty species are described or discussed, including one new genus and five new species. Attempts are made to illustrate their relationship in the form of a genealogical tree and the genera are discussed in the order Promoschorhynchus, Moschorhynchus, Whaitsia and Notosollasia, starting with the primitive new genus and proceeding in the order of specialization. The relationship of the genus Moschorhinus is then discussed and thereafter the incompletely known genera Alopecopsis, Notaelurops, Aneugomphius, Theriognathus and Hyenosaurus. The new species described are Promoschorhynchus plalyrhinus, Moschorhynchus brachyrhinus and M. gracilis, Notosollasia boonstrai and N. longiceps.
