Classification of the flea families (Siphonaptera): II. Family hystrichopsyllidae (Part 4)
2008
Medvedev, S. G.
Distribution of the ancestral, homoiologous, and convergent character states over the tagmata and morpho-functional complexes of the flea body in nine subfamilies of the Hystrichopsyllidae is analyzed. The analysis is based upon the states of 111 characters of 73 structures of 3 tagmata in the adult flea body. The homoiologous states (those arising in parallel in close flea infraorders) comprise 35%, the ancestral (the least specialized) ones, 16%, and the convergent ones, 13% of the total number of character states of all the 10 types. The greatest numbers of the ancestral character states in the Hystrichopsyllidae are found in the mesothorax (22.8%) and aedeagus (21.1%); the metathorax reveals 19.3%, and the head, 17.5% of the ancestral character states. The greatest number of homoiologous character states, 34.1% of the total number, is observed in the mesothoracal segment. Smaller fractions of the homoiologous character states are found in the head (24.6%) and metathorax (17.5%). Those character states which arise in the phylogenetically remote infraorders are considered convergent. The greatest number of convergent character states in the Hystrichopsyllidae (55.1%) is observed in the structure of the aedeagus.
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