A replacement name, Sogdianagonia nom. nov., is proposed for the megatrigoniid bivalve subgeneric name Turkestanella Tashiro, 1979, which is preoccupied by Turkestanella Klishevich, 1969, a genus name in Tentaculitida. In addition, Sogdianagonia nom. nov. is elevated from subgeneric to generic status.
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