Fernando A. B. Silva

Phylogenetic and biogeographic analysis of the genus Caribeacarus (Acari : Opilioacarida), with description of a new South American species

Abstract. The mite order Opilioacarida is widely distributed in the tropical and sub-tropical zones of the world, where it is rare and poorly known. On the American continent only two genera, 14 species and one subspecies are known. This work aimed to describe a new species of Caribeacarus from the state of Pará, in the eastern part of the Brazilian Amazon. A phylogenetic analysis of the species in this genus is also presented, and interpreted along with the historical biogeography of this genus in Central and South America. A key to the species of Caribeacarus is provided.

Dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) of the Floresta Nacional Contendas do Sincorá, Bahia, Brazil

The Floresta Nacional Contendas do Sincora (FLONA-CS) is located at the southeastern edge of the Chapada Diamantina, Bahia, Brazil, and includes in its territory phyto-physiognomic formations that are typical of the Caatinga biome. The Coleoptera fauna, including the Scarabaeinae subfamily, is poorly known in the Caatinga. Therefore, this study aims to: 1) know which species of Scarabaeinae are attracted to baited pitfall traps at the FLONA-CS; 2) provide an illustrated key to identify the species of Scarabaeinae collected at the FLONA-CS. We collected a total of 2143 individuals distributed in 21 species, 12 genera and five tribes. The species Canthon aff. piluliformis , Canthon aff. curvipes , Canthon sp. and Deltochilum verruciferum were the most abundant, representing over 70% of the individuals. Deltochilum verruciferum is one of the most typical species of the Caatinga biome.

Taxonomic revision of the Dichotomius sericeus (Harold, 1867) species group (Coleoptera: Scarabaeidae: Scarabaeinae)

The Dichotomius sericeus species group of the subgenus Luederwaldtinia is reviewed. This group comprises eight species endemic to the South American Atlantic forests, Caatinga and associated areas of Brazil, Paraguay and Argentina: Dichotomius sericeus (Harold, 1867); Dichotomius irinus (Harold, 1867); Dichotomius laevicollis (Felsche, 1901); Dichotomius schiffleri Vaz-de-Mello, Gavino Louzada, 2001; Dichotomius guaribensis sp. nov.; Dichotomius gilletti sp. nov; Dichotomius iannuzziae sp. nov; and Dichotomius catimbau sp. nov. Lectotypes are designated for D. sericeus (Harold, 1867), D. irinus (Harold, 1867), D. laevicollis (Felsche, 1901) and D.sericeus var. aterrimus (Luederwaldt, 1929) [here synonymized with D. sericeus]. In this revision each species is analyzed as follows: a detailed literature review, a diagnosis, description, illustrations of key morphological characters, list of material examined and a geographic distribution.

New records of Scarabaeinae (Coleoptera: Scarabaeidae) in a biogeographical transition zone in the state of Maranhão, Brazil

In this study, we present the first record of Ateuchus semicribratus, Canthon simulans, Canthon histrio, Dichotomius carinatus, Eurysternus caribaeus, Eurysternus nigrovirens, and Ontherus sulcator (Coleoptera: Scarabaeinae) for the state of Maranhao, Brazil. These records expand the currently known geographical distribution of these species and contribute to the knowledge of dung beetles in northeastern Brazil.

A taxonomic review of the Neotropical genus Hansreia Halffter & Martínez, 1977 (Coleoptera: Scarabaeidae, Scarabaeinae)

The taxonomy of the genus Hansreia Halffter & Martínez is reviewed. The genus consists of six species, including three new species: H. peugeoti sp. nov., H. grossii sp. nov., H. krinskii sp. nov. Lectotypes are designated for Hansreia affinis (Fabricius 1801), H. oxygona (Perty 1830) [here considered a valid species] and H. coriacea (Schmidt 1922). The species status of H. coriacea is recognized. A detailed literature review, synonymies, description, illustration of key morphological characters as well as data of the studied material and geographic distribution is provided for each species.

A revision of the Deltochilum subgenus Aganhyboma Kolbe, 1893 (Coleoptera: Scarabaeidae: Scarabaeinae)

The species of the Deltochilum subgenus Aganhyboma, endemic to Central and South America, are reviewed. The species have been divided into complexes, with a brief diagnosis presented for each. A key for identification of 26 currently recognized species is provided in English and Portuguese. Two major groups within the subgenus are recognized (trisignatum and valgum). The first is represented by species typically belonging to the subgenus Aganhyboma (Deltochilum (A.) trisignatum, D. (A.) kolbei, D. (A.) violaceum, D. (A.) cupreicolle and D. (A.) viridescens new status) and three new species described here (D. (A.) amandaarcanjoae, D. (A.) viridicatum and D. (A.) titovidaurrei). The second group (valgum) is represented by: D. (A.) valgum, D. (A.) longiceps new status, D. (A.) acropyge new status, D. (A.) acanthus, D. (A.) icaroides and D. (A.) icariforme), previously assigned to the subgenus Deltohyboma. Twelve new species are described for the valgum group (D. (A.) schefflerorum; D. (A.) streblopodum; D. (A.) feeri; D. (A.) larseni; D. (A.) arturoi; D. (A.) finestriatum; D. (A.) cangalha; D. (A.) alpercata; D. (A.) ritamourae; D. (A.) kolleri; D. (A.) paresi; D. (A.) subrubrum). A lectotype is designated for D. (A.) trisignatum and D. (A.) icariforme. A detailed literature review, synonymies, description, illustration of key morphological characters, data of the studied material and geographic distribution is provided for each species.

A new species of Golinca Thomson (Coleoptera: Scarabaeidae: Cetoniinae): first record of the genus for Brazil

Golinca trevisani Valois & Silva, new species (Coleoptera: Scarabaeidae: Cetoniinae: Trichiini: Incina) from Ouro Preto do Oeste, Rondônia, and Amazonas, Brazil is described, representing the first record of the genus Golinca for Brazil. Diagnosis, illustrations of key morphological characters, the first male genitalia description in the genus, and a key for identification of four species of Golinca are provided.

A revision of the genus Aphengium Harold, 1868 (Coleoptera: Scarabaeidae: Scarabaeinae: Ateuchini)

Aphengium Harold, a dung beetle genus endemic to the Atlantic forests of Brazil, comprises four valid species: A. sordidum Harold, 1868, A. cupreum Shipp, 1897, A. ibateguara sp. nov., A. curtum sp. nov.. In this revision of the genus each species is analyzed as follows: a detailed literature review, a diagnosis, illustrations of key morphological characters, a listing of material examined and geographic distribution. A lectotype is designated for A. sordidum, and a neotype for A. cupreum.

A new giant species of Deltochilum subgenus Deltohyboma (Coleoptera, Scarabaeidae, Scarabaeinae) from Colombia, with notes on D. spinipes Paulian, 1938

Deltochilum (Deltohyboma) gigante sp. nov., from Parque Nacional Las Cuevas de los Guácharos, Huila, Colombia is described based on differences in external and genital morphology. Its diagnostic characters are provided and illustrated. Lectotype and paralectotypes for D. spinipes, a close relative to the new species, are designated.

New distributional data on Oxysternon pteroderum Nevinson, 1892 (Scarabaeidae, Scarabaeinae, Phanaeini) and its possible implications in conservation

Abstract New distributional data are reported on the rare phanaeine dung beetle, Oxysternon pteroderum Nevinson, 1892, based on five specimens recently collected between 1985 and 2010. Before the present study, Oxysternun pteroderum had been reported solely from the super-moist Atlantic coastal forests of southeastern Brazil. We now believe that the distribution of Oxysternun pteroderum follows the riparian areas of large rivers connected to the super-moist forest ecosystem.