Matheus Bento

In this paper, the lined flat bark beetle genus Lepidophloeus Thomas (Coleoptera: Laemophloeidae) is taxonomically revised based on the analysis of type and additional material. New morphological and distributional data provide the basis for the reinterpretation of the specific limits between L. exquisitus (Grouvelle) and L. minusculus (Grouvelle), confirming their status as valid species. The known distribution of L. minusculus is considerably expanded, supporting the first record of the genus in South America. In addition, the genus and species are circumscribed and illustrated in detail using compound light-microscopy and scanning electron microscopy. Illustrated keys to the species of Lepidophloeus and to the Neotropical genera of Laemophloeinae are provided.

A morphology‐based MP analysis is undertaken to test the monophyly of the lined flat bark beetle genus Metaxyphloeus Thomas, 1984, as well as to hypothesize its intra‐ and intergeneric evolutionary relationships. Based on the results of the present work, Metaxyphloeus , as currently composed, is hypothesized as a monophyletic assemblage of rostrate laemophloeids, whose definition is adjusted hereby to include two previously unknown, earliest diverging lineages. A taxonomic treatment is provided for all known species of the genus, which are diagnosed and illustrated in fine detail, including the mouthparts and genital structures. In addition, three further species are proposed as new: M. brevirostris sp. nov. , M . dorsocapillatus sp. nov., and M . homalirhinoides sp. nov. Biological information constitutes rare direct evidence for mycophagy among members of Metaxyphloeus , which may also serve as vectors for the dispersion of fungal conidia and spores (endozoochory). Finally, a key to the species of Metaxyphloeus is provided, and their distributions are synthetized in maps.

In this paper, Mimogeniates margaridae Martínez (Scarabaeidae, Rutelinae, Geniatini) is synonymized with Leucothyreus noctivagus Ohaus ( syn. nov. ). Hence, the monotypic genus Mimogeniates Martínez is a new junior synonym of Leucothyreus MacLeay ( syn. nov. ). Leucothyreus noctivagus is redescribed and illustrated based on the type and additional material, including new distributional records in southern Brazil. As a result of our work, the tribe Geniatini now includes 12 genera.

The generic placement of four South American species currently assigned to the lined flat bark beetle genus Laemophloeus Dejean ( sensu lato ) (Cucujoidea, Laemophloeidae) is re-assessed based on the examination of type material. As a result, the following species are hereby transferred to the genus Charaphloeus Casey: Charaphloeus aeneus (Grouvelle, 1876), comb. nov. ; C. deletus (Grouvelle, 1896), comb. nov. ; C. gounellei (Grouvelle, 1896), comb. nov. ; and C. pilatei (Grouvelle, 1876), comb. nov. Taxonomic and nomenclatural notes are provided and lectotypes are designated for all four species. Distributional data are also synthesised. Based on the type and additional material, C. pilatei is re-described and illustrated in detail including diagnostic characters of the mouthparts and genitalic structures and its known distribution is expanded.

This paper describes and illustrates two new species of Laemophloeus Dejean (sensu stricto) (Coleoptera: Cucujoidea: Laemophloeidae) from the Amazon region of Brazil: L. claudioruyi sp. nov. and L. obeliscus sp. nov. Both species are diagnosed and compared to their most similar congeners with antennal club composed of 3 antennomeres, primarily based on clypeal, elytral, and genital morphology, allowing for identification. Additionally, the preexisting keys to Laemophloeus species with 3- and 6-segmented antennal clubs are modified and combined into a single key that includes all the Neotropical species of the genus.

This paper describes and illustrates a new Amazonian species of the lined flat bark beetle genus Dysmerus Casey, 1884. Dysmerus calicicornis sp. nov. is most similar to two species, D. curvicornis Thomas, 2009 and D. hamaticornis Thomas, 2009, sharing with them the male antennal scape apically flat, strongly deflected internally. The new species, however, can be easily distinguished from both by the male antennal scape caliciform in dorsal view, with a curved, tooth-like outer projection, and the presence of secondary sublateral lines on the pronotal surface. Additionally, the previous key to Dysmerus males is modified to include D. calicicornis sp. nov.

Cryptolestes obesus Thomas, 2002 (Coleoptera: Laemophloeidae) was described based on a single female specimen collected in Rondônia state, Brazil. As previously hypothesized, the robust body shape and the presence of complete secondary sublateral lines on the pronotum are diagnostic for C. obesus and fundamental traits for male association. Here we associate and describe the conspecific male, with a new record of this species for Santa Catarina state, Brazil. The habitus, antennal scape, and genitalia of the male are illustrated.

This paper records and illustrates the Laemophloeidae from the Brazilian oceanic archipelago of Fernando de Noronha. This family is represented in the region by two subfamilies and five genera, each of which includes a single species: Cryptolestes ferrugineus (Stephens, 1831), Dysmerus impolitusThomas, 2009, Lathropus parvulus Grouvelle, 1878, and Rhabdophloeus sp. (all Laemophloeinae); and Propalticus sp. (sole representative of Propalticinae). All the taxa are hereby newly recorded in Fernando de Noronha (except Rhabdophloeus sp.). Based on these findings, Propalticinae Crowson, 1952 represents a new record for the New World, while Lathropus Erichson, 1845 is recorded for the first time in Brazil. In addition, Propalticus sp. is briefly characterized and illustrated, including the female genital morphology. We also provide an illustrated key to subfamilies and genera of Laemophloeidae from Fernando de Noronha.

This paper records and illustrates the Laemophloeidae from the Brazilian oceanic archipelago of Fernando de Noronha. This family is represented in the region by two subfamilies and five genera, each of which includes a single species: Cryptolestes ferrugineus (Stephens, 1831), Dysmerus impolitus Thomas, 2009 , Lathropus parvulus Grouvelle, 1878, and Rhabdophloeus sp. (all Laemophloeinae); and Propalticus sp. (sole representative of Propalticinae). All the taxa are hereby newly recorded in Fernando de Noronha (except Rhabdophloeus sp.). Based on these findings, Propalticinae Crowson, 1952 represents a new record for the New World, while Lathropus Erichson, 1845 is recorded for the first time in Brazil. In addition, Propalticus sp. is briefly characterized and illustrated, including the female genital morphology. We also provide an illustrated key to subfamilies and genera of Laemophloeidae from Fernando de Noronha.