A taxonomic revision of the Bothynus villiersi Endrdi, 1968 species group (Coleoptera: Scarabaeidae: Dynastinae).

The Bothynus villiersi species group (Coleoptera: Scarabaeidae: Dynastinae: Pentodontini) is revised and is composed of five South American species: Bothynus villiersi Endrdi, 1968; Bothynus horridus Endrdi, 1968; Bothynus alvarengai Martnez, 1983; Bothynus spinophallicus (Ratcliffe Cave, 2021) new combination; and Bothynus belemensis new species. Redescriptions, illustrations, new diagnostic characters, identification key, and a first known geographical distribution map for the group are presented.

A hidden Megasoma/ Kirby species under the enigmatic genus Gibboryctes Endrödi (Coleoptera: Scarabaeidae: Dynastinae).

Gibboryctes Endrödi, 1974 (Coleoptera: Scarabaeidae: Dynastinae: Oryctini) is an uncommon Neotropical genus comprising five valid species (Gasca-Álvarez Ratcliffe 2011; Dupuis 2019). Endrödi (1974) established the genus based on Gibboryctes szelenyii Endrödi, 1974 and defined it by the absence of sexual dimorphism; short, triangular, and pointed clypeus; bidentate mandibles projected beyond the anterior clypeal margin; and protibiae quadridentate. After that, Gibboryctes waldenfelsi (Endrödi, 1977) and Gibboryctes gracilicornis (Prell, 1912) were assigned to Gibboryctes, from Strategus Kirby, 1828 and Heterogomphus Burmeister, 1847, respectively (Ratcliffe Dechambre 1983; Dupuis Dechambre 2008). Gibboryctes bollei Dechambre, 2006 and Gibboryctes impunctatus Dupuis, 2019 were subsequently described.

Bothynus entellus (LePeletier amp; Serville) (Coleoptera: Scarabaeidae: Dynastinae) species group: taxonomic revision and description of two new species.

The Bothynus entellus (LePeletier Serville) (Coleoptera: Scarabaeidae: Dynastinae: Pentodontini) species group is reviewed with redescriptions, diagnoses, illustrations, and separate identification keys to males and females. Distribution maps for all species in this species group are presented for the first time. Furthermore, two new species, Bothynus araya Duarte Grossi new species and Bothynus condacki Duarte Grossi new species, are described.

Rediscovery of Bothynus cribrarius (Fairmaire) (Coleoptera, Melolonthidae, Dynastinae, Pentodontini): description of the male and precise location data

ABSTRACT Bothynus cribrarius (Fairmaire) was rediscovered after studying the MNRJ and FIOC collections. The male is described and illustrated for the first time. Accurate location data is presented after 130 years since its species description.