The morphology and evolution of the female postabdomen of Holometabola (Insecta)

Arthropod Structure & Development
Frank HünefeldR G Beutel

Abstract

In the present article homology issues, character evolution and phylogenetic implications related to the female postabdomen of the holometabolan insects are discussed, based on an earlier analysis of a comprehensive morphological data set. Hymenoptera, the sistergroup of the remaining Holometabola, are the only group where the females have retained a fully developed primary ovipositor of the lepismatid type. There are no characters of the female abdomen supporting a clade Coleopterida + Neuropterida. The invagination of the terminal segments is an autapomorphy of Coleoptera. The ovipositor is substantially modified in Raphidioptera and distinctly reduced in Megaloptera and Neuroptera. The entire female abdomen is extremely simplified in Strepsiptera. The postabdomen is tapering posteriorly in Mecopterida and retractile in a telescopic manner (oviscapt). The paired ventral sclerites of segments VIII and IX are preserved, but valvifers and valvulae are not distinguishable. In Amphiesmenoptera sclerotizations derived from the ventral appendages VIII are fused ventromedially, forming a solid plate, and the appendages IX are reduced. The terminal segments are fused and form a terminal unit which bears the genital opening subapically...Continue Reading

References

Jun 26, 2009·BMC Biology·Brian M WiegmannDavid K Yeates

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Citations

Oct 4, 2015·Arthropod Structure & Development·Qiong-Hua Gao, Bao-Zhen Hua
Apr 12, 2020·Journal of Evolutionary Biology·Bruno C GenevciusAdriana E Marvaldi
Mar 21, 2019·Journal of Morphology·Daniel TrögerHans Pohl

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