Distribution Southeastern Brazil Systematics Monotypic. Male genitalia unique. The types of Epialus [sic] tessellatus Herrich-Schäffer, , Phassus agrionides Walker, 1856, Roseala bourgognei Viette, 1950, and Thiastyx catharinae Viette, 1951 were examined by Carlos Mielke and through examination of large series, morphology and mtDNA barcode sequences, all are found to be synonymies. To stabilise the species’ identification a lectotype was designated for one syntype ♀ in the BMNH of Phassus agrionides Walker, 1856 that bears a label “holotype”, and one syntype ♀ in the MNHN of Epialus [sic] tessellatus Herrich-Schäffer,  that bears a label “type” (Mielke & Grehan, 2012).
Biology Larvae probably callus-feeding borers of woody trees or shrubs. A pest borer of grape vines in southern Brazil (Carlos Mielke, personal communication).
Reference Mielke C. & J.R. Grehan 2012.Catalogue of the Latin American Hepialidae with taxonomic remarks (Lepidoptera). Nachricten des Entomologischen Veriens Apollo, N. F. 32: 131–158.
Roseala tessellatus (Herrich-Schäffer, ) Southeastern Brazil
Male. Natural History Museum, London. Image courtesy Carlos Mielke
Male. Natural History Museum, London.
Curitiba, Brazil. Courtesy Carlos Mielke. JRG M187