The female postabdomen and genitalia of the basal moth family Heterobathmiidae (Insecta: Lepidoptera): structure and phylogenetic significance

Arthropod Structure & Development
Frank Hünefeld, Niels P Kristensen

Abstract

Female Heterobathmia have the segments behind VIII forming a compact 'terminal unit' with a large saddle-shaped dorsal plate and a membranous ventroposterior surface bearing the separate gonopore and anus. While females of most of the nine known species are overall similar, Heterobathmia valvifer is unique amongst lepidopterans in possessing paired ventral appendages ('ovipositor valves') arising from the intersegmental groove following segment VIII; evidence from musculature contradicts an interpretation of these appendages structures as 'true' ovipositor valves. The ventroposterior wall of the terminal unit in H. valvifer bears paired sclerites, possible homologues of the 'ventral rods' in basal Lepidoptera-Glossata. In Heterobathmia megadecella sclerites on paired longitudinal elevations in comparable positions probably are/include homologues of these sclerites. Their similarity with paired sclerotizations in the corresponding region of hydrobiosid caddisflies is noted. A prominent frame-like sclerotization in the genital chamber, located in front of the spermathecal duct origin, is present only in H. megadecella. Putative heterobathmiid autapomorphies include an enlarged 'subgenital plate' on venter VIII, absence of apophys...Continue Reading

References

May 7, 2010·Proceedings. Biological Sciences·Marko MutanenLauri Kaila

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Citations

May 16, 2012·Arthropod Structure & Development·Frank HünefeldRolf Georg Beutel

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