Two new species of Austrolimnius Carter & Zeck (Insecta: Coleoptera: Elmidae) from Southeastern Brazil

Abstract

The genus Austrolimnius Carter & Zeck has its greatest known diversity in Oceania, but its fauna in the Americas is poorlyknown. In this paper, two new species—Austrolimnius uncatus sp. nov. and A. bocainensis sp. nov.—are described and illus-trated based on adult specimens collected at Serra da Bocaina National Park, São José do Barreiro Municipality, São PauloState, and Nova Friburgo Municipality, Rio de Janeiro State, Brazil. Austrolimnius uncatus sp. nov. is characterized by the longsetae on the mesotarsus, the medial expansion of the hind tibiae, and the hook-like shape of the male genitalia. Austrolimniusbocainensis sp. nov. can be recognized by the absence of setae on the mid-tarsus, the cylindrical hind tibiae, and the slightlycurved genitalia with few setae. A pictorial key for the Brazilian species of the genus is given. New records of Brazilian species of the genus are reported.

La familia Elmidae (Insecta: Coleoptera: Byrrhoidea) en Colombia: riqueza taxonómica y distribución

“…Las larvas son subtriangulares en sección transversal, con aspecto poco esclerotizado (Figura 1D); se caracterizan por tener un largo sensorio sobre el segundo segmento de la antena, el cual es más largo que el tercer antenito. También tienen hileras longitudinales de gránulos dispersos en los tergos abdominales y torácicos (Manzo, 2007;Miranda, et al, 2012).…”

“…y en todas las regiones naturales (Tabla 1, Figura 1I). Estos organismos suelen habitar corrientes con piedra u hojarasca (Miranda, et al, 2012; Martínez-Román & Archangelsky, 2017) y en este estudio se hallaron en una variedad de sustratos incluidos hojarasca, piedra, arena, macrófitas, musgo y sedimentos, en corrientes rápidas, piscinas y zonas de salpicadura. Existen registros del género hasta los 3.500 m s.n.m.…”

Austrolimnius cleidecostae, a new species of riffle beetle (Coleoptera: Elmidae) from Brazil with habitat notes and updated key of the Brazilian species of the genus

“…Specimens deposited in museums were also studied. The species of Austrolimnius were identified using the taxonomic key of Miranda et al (2012), the original descriptions, and comparison to photographs of holotypes deposited in the Natural History Museum (BMNH, London, United Kingdom) and the Muséum national d'Histoire naturelle (MNHN, Paris, France).…”

“…Brazil (SP, SC) A. eris Hinton, 1971 México, Belize, Guatemala, Costa Rica, Panama, Venezuela, Brazil (GO, DF*), Ecuador; Argentina A. formosus (Sharp, 1882) México, Belize, Guatemala, Nicaragua, Costa Rica, Panama, Venezuela, Brazil (PA*, GO*, DF*, MT*, RJ, SP*, SC*), Peru, Argentina A. laevigatus (Grouvelle, 1889) Brazil (RJ, SP, SC) A. musgravei Hinton, 1939 French Guiana, Brazil* (AM) A. pilulus (Grouvelle, 1889) Brazil (RJ, SP, SC, RS*) A. pusio Hinton, 1941 Brazil (GO*, DF*, RO), Ecuador A. uncatus Miranda, Sampaio & Passos, 2012 Brazil (RJ, SP)…”

Aquatic beetle diversity from Volcán Tacaná, Mexico: altitudinal distribution pattern and biogeographical affinity of the fauna

“…Distribution. Mexico (Chiapas, Morelos, Guerrero), Belize, Guatemala, Nicaragua, Costa Rica, Panama, Colombia, Venezuela, Peru, Brazil, Argentina (Sharp 1882 ;Hinton 1940bHinton , 1941Hinton , 1971Blackwelder 1944;Shepard 2004;Manzo 2007;Passos et al 2009;Manzo and Archangelsky 2012;Miranda et al 2012;González-Córdoba et al 2016, 2020. Previous altitudinal records of A. formosus are from 600 m and 2,438 m (Hinton 1940b).…”