Three new species of Macrelmis Motschulsky, 1859 (Coleoptera: Elmidae: Elminae) from the Brazilian Cerrado Biome with updated key for the Macrelmis of Brazil

Abstract

Three new species of Macrelmis Motschulsky, 1859 (Macrelmis bispo sp. nov., Macrelmis froehlichi sp. nov., and Macrelmis nessimiani sp. nov.) are herein described and illustrated. The species were collected from several streams in Goiás State, Brazil, a formerly unknown region concerning Elmidae fauna. We also provide an updated key for the Macrelmis species of Brazil.

Three new species of Macrelmis Motschulsky (Coleoptera: Elmidae: Elminae) from Southeastern Brazil with new definition of species groups to the genus

“…Distribution (Fig. 6): Brazil: Santa Catarina (Hinton 1946), Rio de Janeiro (present work), Goiás (Barbosa et al 2013) and São Paulo (Hinton 1946).…”

“…M. tijucana was not assigned to any group, but was stated as similar to M. aequalis, M. celsa, M. pubescens, M. salti, M. sandersoni, M. striata, and M. striatoidea (Passos & Felix 2004), but of these, only M. salti is in the newly proposed aristea group. M. froehlichi was also never assigned to any group (Barbosa et al 2013).…”

“…Argentina: Cordoba, Jujuy, Misiones, Salta, San Luis, San Juan (Manzo & Archangelsky 2001). Brasil: Goiás (Barbosa et al 2013), Rio de Janeiro (Sampaio et al 2012), Santa Catarina (Hinton 1946). Bolivia: Sidras and Tarijá (Manzo & Archangelsky 2008).…”

“…Manzo (2003) included one more species, M. saltensis, which also has pronotum with gibbosity. M. bispo was the last species added to this group due its "obovate gibbosity near the middle of pronotal base" (Barbosa et al 2013). Despite the external similarities of these species (gibbosity on pronotum), the male genitalia of most of them is completely different, so, according to the current definition, species with different shape of genitalia should not be included in the group.…”

Spanglerelmis, a new genus of Elmidae (Insecta: Coleoptera) from Brazil with new species and biological notes

“…Thus, it is highly likely that the richness of species of Elmidae within Brazil has been strongly underestimated. Despite this, knowledge has advanced, including the description of new species and the development of taxonomic keys (Fernandes et al 2011;Fernandes & Hamada 2012;Sampaio et al 2012;Barbosa et al 2013;Ferreira-Jr et al 2014;Passos et al 2015;Polizei 2018aPolizei , 2018bPolizei & Barclay 2018, 2019a, 2019bLinský et al 2019;Almeida et al 2020;Polizei et al 2020aPolizei et al , 2020bPolizei & Fernandes 2020).…”