Abstract
The genital and pregenital skeleton and musculature were studied in males of the following species of the muscid subfamily Phaoniinae: Helina luteisquama (Zetterstedt, 1845), H. bohemani (Ringdahl, 1916), Phaonia meigeni Pont, 1986, Ph. hybrida (Schnabl, 1888), and Ph. lugubris (Meigen, 1826). The examined species are very similar in the structure of the sclerites and muscles of their terminal segments. The structure of pregenital muscles in Phaoniinae is similar to that in the subfamily Azeliinae, which occupies the basal position within Muscidae. The fewer muscles of the phallapodeme, surstyli, and subepandrial sclerites in Phaoniinae constitute the apomorphic character states and do not allow this subfamily to be placed at the base of the Muscidae branch. In general, the structure of the male pregenital musculature in Phaoniinae is most similar to that in Mydaeinae, and both Phaoniinae and Mydaeinae occupy an intermediate position between the basal Azeliinae and the derived Muscinae.
Notes
Due to genital rotation, sclerites of these segments do not always lie in the usual position; therefore, such characteristics as “wide” or “narrow” describe only the geometric shape of the sclerites, regardless of their orientation relative to the body axis.
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ACKNOWLEDGMENTS
We are sincerely grateful to A.V. Barkalov (Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, Novosibirsk) for providing alcohol-preserved material for morphological studies, and to the anonymous reviewer for appreciation of our manuscript.
Funding
The work of V.S. Sorokina was carried out at the Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, Novosibirsk (State Research Program 1021051703269-9-1.6.12). The work of O.G. Ovtshinnikova was carried out at the Zoological Institute of the Russian Academy of Sciences, St. Petersburg (State Research Program 122031100272-3).
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Statement on the welfare of animals. All the applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All the procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.
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Sorokina, V.S., Ovtshinnikova, O.G. Musculature of the Male Abdominal Segments and Terminalia of Helina Robineau-Desvoidy, 1830 and Phaonia Robineau-Desvoidy, 1830 (Diptera, Muscidae: Phaoniinae). Entmol. Rev. 103, 276–289 (2023). https://doi.org/10.1134/S0013873823030041
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DOI: https://doi.org/10.1134/S0013873823030041