Entomological Review

, Volume 98, Issue 1, pp 10–20 | Cite as

Morphological Diversity of the Skeletal Structures and Problems of Classification of Fleas (Siphonaptera). Part 6

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Abstract

The structure of 76 skeletal elements of adult fleas was analyzed, and the distribution of 114 characters with 446 character states over the body tagmata, segments, and morphofunctional complexes was investigated. Among them, 40% of the characters (40) and their states (163) describe the diversity of the structures of the frontal complex (including those of the head and prothorax), which is related to the specific features of flea parasitism. A large part of the characters (18) and their states (83) describe the structures of the nototrochanteral complex of the meso- and metathorax responsible for jumping. The total number of all types of homoplasies (258 states) is almost 1.8 times as great as the number of the states (145) that may be regarded as synapomorphies. The ancestral states (43) comprise a smaller portion of the total number. The proportion of the synapomorphic and homoplastic character states varies between the morphofunctional complexes.

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© Pleiades Publishing, Inc. 2018

Authors and Affiliations

  1. 1.Zoological InstituteRussian Academy of SciencesSt. PetersburgRussia

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