The monotypic genus Phanoceroides was initially classified within the subfamily Elminae, based solely on the distribution and type of pubescence on the body surface. Although a close relationship with Larainae was suggested (Hinton 1939, Maier 2013), its taxonomic position and phylogeny remained unresolved. Based on newly collected material, we describe here P. fernandesi sp. n. and document morphological characters and differences of adults and larvae of P. aquaticus Hinton, 1939 and P. fernandesi sp. n. To clarify the taxonomic position of Phanoceroides within Elmidae, we used molecular data (cox1 and mtDNA). The results support position of the genus within the subfamily Larainae with Hypsilara Maier & Spangler, 2011 as a close relative.
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