Revision of Bruchomyiinae (Diptera, Psychodidae) of the Oriental Region, with description of a new genus and species and discussion of putative male/female antagonistic coevolution

in Insect Systematics & Evolution
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We revise the Oriental species of Bruchomyiinae based on type and additional material, with first descriptions of the genus Alexanderia Wagner & Kvifte, gen. nov. and A. thailandensis Wagner, Rulik & Polseela, sp.nov. The genus further comprises Nemapalpus orientalis Edwards, 1928 (type species), Nemopalpus vietnamensis Quate, 1962 and Nemapalpus unicolor Edwards, 1928. Alexanderia thailandensis is described using morphology of males and females and DNA barcodes, whereas A. orientalis Edwards, 1928 comb.nov., A. unicolor Edwards 1928 comb.nov., and A. vietnamensis Quate 1962 comb. nov. are redescribed. The male and female internal genitalia in the genus are discussed in the context of sexual selection, and we suggest that the spermathecal ducts of the female and the basiphallic musculature of the male may be shaped by a male/female coevolutionary arms race.

Revision of Bruchomyiinae (Diptera, Psychodidae) of the Oriental Region, with description of a new genus and species and discussion of putative male/female antagonistic coevolution

in Insect Systematics & Evolution

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References

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Figures

  • View in gallery

    Alexanderia thailandensis sp. nov.: 1 – male, wing; 2 – male, styles and aedeagus; 3 – male, parameral complex and distiphallus; 4 – female abdomen, lateral view; 5 – female, basal part of abdomen with spermatheca and basal part of helical complex; 6 – female, distal part of abdomen with dark and thin looped parts of gonoduct and terminal end of helical complex

    [eja ap – ejaculatory apodeme-basiphallus, c – cercus, d – distiphallus, gcx – gonocoxite, gst – gonostylus, hel com – helical complex, gdlo – gonoduct looped, gdd – gonoduct dark, spth – spermatheca, vas def – vas deferens, pm – paramere, v – genital valve, VII, VIII – segment number]

  • View in gallery

    Alexanderia orientalis Edwards: 7 – male, head with basal and distal antennomeres and palpomeres; 8 – male, genitalia ventral view; 9 – female genitalia, ventral view; 10 – male, abdomen segments 6 to 8 and genitalia, lateral view, gonopods in the foreground omitted; 11 – tip of female abdomen with part of spermatheca, lateral view.

    [a – ascoid, aed – aedeagus, c – cercus, epa – epandrium, gcx – gonocoxite, gdd – gonoduct dark, gst – gonostylus, lch – lateral chamber, proc – proctiger, spth–spermatheca, s – sternites, t – tergites, v – valve, VII, VIII segment number]

  • View in gallery

    Alexanderia unicolor (Edwards) holotype: 12 – female, abdomen with spermatheca, looped and dark part of gonoduct, dorsal view; 13 – abdomen tip with valves and terminal section of spermathecal duct. Alexanderia vietnamensis (Quate) – holotype: 14 – female, valves with internal scleroses; 15 – female, sclerites visible between valves, ventral view. Alexanderia thailandensis sp. nov.: 16 – female, cerci and proctiger dorsal view; 17 – female, gonoporus and adjacent sclerites, ventral view.[c – cercus, cs – cross sclerite, gdlo – gonoduct looped, gdd – gonoduct dark, gp – gonoporus, isc – internal scleroses, p – proctiger, spth – spermatheca, v – valve]

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