Pyrearinus flatus Costa, 1978: 203 Holotype: 1 ♂. Castilho, mar. esq., r. Paraná, SP. X.1964, Exp. Depto. Zool.; [on red] holótipo; [on red] Pyrearinus flatus sp. nov. C. Costa det. 1978, holótipo. Conservation status: Good condition. Paratypes: 7. Brasil; Coll. Schwarz; Diech Entomol. Institut Berlin; DEIE; [on red] Pyrearinus flatus sp. nov. C. Costa det. 1978, parátipo. Conservation status: Good condition. Paratypes: 2 [unknown sex]. XI. 1944, São Paulo, N. Horizonte, col. Araujo; IB; [on red] Pyrearinus flatus sp. nov. C. Costa det. 1978, parátipo. Conservation status: Good condition. Abdomen glued on card under one specimen. Paratype: 1 ♂. San Bernardino, A. Fischer, S. G., 31. I. 1913; Seckenberg Museum, Frankfurt/ Main; [on red] Pyrearinus flatus sp. nov. C. Costa det. 1978, parátipo; SMF. Conservation status: Good condition; abdomen glued on card under specimen; genitalia glued on transparent card under specimen. Paratype: 1 [unknown sex]. Paraguay; MNHNP; [on red] Pyrearinus flatus sp. nov. C. Costa det. 1978, parátipo. Conservation status: Good condition. Paratype: 1 [unknown sex]. Três Lagoas, MT, mar. Esq. Rio Sucuriu, Faz. Canaã, 26.X–4–XI, F. Lane col. 1970; [on red] Pyrearinus flatus sp. nov. C. Costa det. 1978, parátipo. Conservation status: Good condition. Paratype: 1 [unknown sex]. Chapada, Brazil, Acc. No, 2966; Nov.; CM; [on red] Pyrearinus flatus sp. nov. C. Costa det. 1978, parátipo. Conservation status: Good condition; abdomen glued on card under specimen; genitalia glued on transparent card under specimen.

Published as part of Ferreira, Vinicius De Souza, 2015, An annotated catalogue of the type material of Elateroidea Leach, 1815 (Coleoptera) deposited in the Coleoptera collection of the Museum of Zoology of the University of São Paulo, Brazil, pp. 263-310 in Zootaxa 3937 (2) on page 292, DOI: 10.11646/zootaxa.3937.2.3, http://zenodo.org/record/241218