Abstract
ABSTRACT The genus Stenhelmoides comprises 15 species spread over all Central and South America and its greatest species richness is clearly associated with Amazonian regions. Based on examination of type specimens and additional material, we describe and illustrate the true male genitalia of Stenhelmoides strictifrons, which had until now been incorrectly illustrated in the literature. We also report new records of the genus Stenhelmoides from Brazil and Guyana. In addition to pictures of the species’ habitus, we provide pictures of the type specimens of Stenhelmoides grandis, S. grouvellei, S. guyanensis; S. strictifrons and S. submaculus. Based on the International Code of Zoological Nomenclature, we recognize additional paralectotypes for S. guyanensis and for S. grouvellei.
Highlights
Elmidae Curtis, 1830 is a cosmopolitan family of Coleoptera with around 1503 known species distributed in 151 genera (Jäch et al 2016; Short 2018)
We report new records for Stenhelmoides beebei Spangler and Perkins, 1989, Stenhelmoides stegastus Spangler and Perkins, 1989, Stenhelmoides strictifrons Grouvelle, 1908, Stenhelmoides platysternum Spangler and Perkins, 1989, and Stenhelmoides variabilis Spangler and Perkins, 1989 in Brazil, and S. stegastus and S. variabilis in Guyana
Fernandes discovered that Stenhelmoides specimens from different regions in Brazil he had already determined as a new Stenhelmoides species were specimens of S. strictifrons
Summary
Elmidae Curtis, 1830 is a cosmopolitan family of Coleoptera with around 1503 known species distributed in 151 genera (Jäch et al 2016; Short 2018). The family has its greatest richness and abundance in the Neotropical region (Jäch and Balke 2008) and, as expected, the Amazonian elmid fauna is very diverse. The genus Stenhelmoides Grouvelle, 1908 comprises 15 species distributed throughout the Neotropical region, from. Despite being more likely associated with Amazonian regions, where most of the known species can be found, the genus seems to potentially occur in many kinds of Neotropical biomes. Grouvelle (1908) described Stenhelmoides based on two species, Stenhelmoides strictifrons and Stenhelmoides guyanensis from French Guiana (Rivière Lunier, Tumuc Humac), but without designating a type series, nor did he mention the number of specimens examined for either species. In the 1960s, examined Grouvelle’s collection and designated
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