Orphninae

Unpublished

Genus Cerhomalus (Scarabaeidae, Orphninae)

Orphninae, Orphnus angolensis Quedenfeldt, 1884

The largest orphnines (body length 15–22 mm). Colour uniformly dark brown to black. Clypeus of both sexes with a transversal keel, higher and apically bilobate in males and lower but distinct in females. Pronotal disc of males more or less depressed, sometimes slightly excavated, but distinct pronotal lateral processes always absent. Elytra convex, without ridges, with humeral umbones. Elytral surface sparsely covered with rounded punctures; punctures arranged in longitudinal striae, which are more distinct on disc. Protibiae with 3 strong outer teeth similar in both sexes. Apical protibial spur absent in males. Middle and posterior legs similar in shape; posterior femora and tibiae about 1/8 longer than middle ones. Parameres symmetrical, not setose apically, very wide in lateral view; inner sides of parameres with longitudinal excavations in 3 species. Ventroapical part of phallobase strongly sclerotized, in shape of 2 incompletely separated sclerites...

Contribution to the knowledge of Aegidinus Arrow

 

Frolov A. V., Akhmetova L. A., Vaz-de-Mello F. Z. 2019. Contribution to the knowledge of Aegidinus Arrow (Coleoptera: Scarabaeidae: Orphninae): new species and comments on the classification and nomenclature. Journal of Natural History. 53 (11-12): 725-747.

Two new species of the Neotropical Orphninae genus Aegidinus Arrow are described: Aegidinus noriegai sp. nov. and Aegidinus colbyae sp. nov. The lectotype of Orphnus candezei Preudhomme de Borre, 1886, is designated. Aegidium steinheili Harold, 1880, considered a synonym of Aegidinus guianensis (Westwood, 1846) is revalidated as Aegidinus steinheili (Harold). The following new synonymies are established: Aegidinus oreibates Colby, 2009 = Aegidinus guianensis (Westwood, 1846), syn. nov.; Aegidinus crypticus Colby, 2009 = Aegidinus guianensis (Westwood, 1846), syn. nov.; Aegidinus sunidigea Colby, 2009 = Aegidinus candezei (Preudhomme de Borre, 1886), syn. nov.; Aegidinus unicus Colby, 2009 = Aegidinus cornutus Colby, 2009, syn. nov. The male of Aegidinus simulatus Colby, 2009, is described. An updated diagnostic key to the males of Aegidinus is provided. The taxonomic and diagnostic characters as well as phylogenetic relationships of Aegidinus are discussed.

Contribution to the knowledge of the Neotropical canopy dwelling genus Onorius

 

Frolov A. V., Akhmetova L. A., Vaz-de-Mello F. Z. 2019. Contribution to the knowledge of the Neotropical canopy dwelling genus Onorius (Coleoptera, Scarabaeidae, Orphninae): another species from southern Ecuador and notes on the hind gut morphology in the Orphninae. Journal of Natural History. 53 (17–18): 1071–1077.

The generic status of Neotropical Orphninae genus Onorius Frolov et Vaz-de-Mello is supported by the discovery of another species in south-eastern Ecuador. The new species differs from O. inexpectatus Frolov et Vaz-de-Mello in the body sculpture and colouration. Both species have two large diverticula in the proximal part of the ileum; such structures are not found in the other members of the Aegidiini and are supposedly autapomorphic for Onorius.

Revision of the Neotropical scarab beetle genus Aegidiellus Paulian (Coleoptera: Scarabaeidae: Orphninae) with description of two new species.

 

Frolov A. V., Akhmetova L. A., Vaz-de-Mello F. Z. 2017. Revision of the Neotropical scarab beetle genus Aegidiellus Paulian (Coleoptera: Scarabaeidae: Orphninae) with description of two new species. Journal of Natural History. 51: 1767–1779.

The Neotropical Orphninae genus Aegidiellus Paulian is revised. Two new species are described: Aegidiellus zezaoi sp. nov. and Aegidiellus dentipenis sp. nov. The genus occurs in eastern Brazil, mostly in the Atlantic Forest ecoregion. Key to species, descriptions, illustrations of habitus and male genitalia, and distribution maps are given.

Revision of the mainland species of the Neotropical genus Aegidium Westwood

 

Frolov A. V., Akhmetova L. A., Vaz-de-Mello F. Z. 2017. Revision of the mainland species of the Neotropical genus Aegidium Westwood (Coleoptera: Scarabaeidae: Orphninae). Journal of Natural History. 51 (19–20): 1035–1090.

The Orphninae genus Aegidium Westwood is revised from mainland South and Central America. Ten new species are described: Aegidium angustum sp. nov., Aegidium bordoni sp. nov., Aegidium gilli sp. nov., Aegidium howdeni sp. nov., Aegidium onorei sp. nov., Aegidium peresfilhoi sp. nov., Aegidium peruanum sp. nov., Aegidium rafaeli sp. nov., Aegidium sinuatum sp. nov. and Aegidium varians sp. nov. The lectotype of Aegidium columbianum Westwood is designated. Keys, descriptions, illustrations of habitus and male genitalia, and distributional record maps are given for all species.

Revision of the subgenus Orphnus (Phornus)

Fig. 1. Orphnus (Phornus) spp. A–M. O. giganteus. N. O. renaudi. O. O. ferrierei. P. O. valeriae. Q. O. parastrangulatus. R. O. strangulatus.

Frolov, A. V. & Akhmetova, L. A. 2016. Revision of the subgenus Orphnus (Phornus) (Coleoptera, Scarabaeidae, Orphninae). European Journal of Taxonomy 241: 1–20

The Afrotropical subgenus Phornus Paulian of the genus Orphnus Macleay is revised and currently comprises six species. Four new species are described: Orphnus renaudi, Orphnus valeriae,Orphnus ferrierei,and Orphnus parastrangulatus. The subgenus is characterized by the coarse stridulatory field, sclerotized plate on the second abdominal sternite near plectrum, absence of the pronotal lateral processes in males, rounded apices of the parameres and endophallus without armature, although some of these characters differ in O. giganteus. Symphysocery is reported for the first time for members of the Orphninae. In O. giganteus, the majority of specimens have malformed antennomeres. Four of the six species of Phornus are brachypterous and all species except for O. giganteus Paulian are known only from males. A key to Phornus species and a map of their localities are provided.

A new brachypterous scarab species, Orphnus longicornis from East African Rift

Figures 1–7. Orphnus longicornis.

Frolov, A. V. & Akhmetova, L. A. 2015. A new brachypterous scarab species, Orphnus longicornis (Coleoptera: Scarabaeidae: Orphninae), from the East African Rift. Zootaxa, 4039(3): 475–477

Examination of the material housed in the Museum of Natural History of Humboldt-Universität, Berlin, Germany (ZMHUB), revealed a series of brachypterous Orphnus beetles belonging to an undescribed species.

Rediscovery of the enigmatic Stenosternus costatus from São Tomé Island

Figures 1–2. Stenosternus costatus Karsch, habitus in dorsal view and abdomen in ventral view. 1 — female, 2 — male.

Frolov, A. V. & Akhmetova, L. A. 2015. Rediscovery of the enigmatic Stenosternus costatus Karsch (Coleoptera: Scarabaeidae: Orphninae) from São Tomé island. Zootaxa, 4007, 440–444.

Stenosternus Karsch, 1881 is one of the least-known genera of the Orphninae scarab beetles. It was described from a single specimen of the odd-looking S. costatus Karsch, 1881, from the island of São Tomé, Gulf of Guinea, West Africa. Since then, no more findings of S. costatus have been reported... We discovered additional specimens of both sexes of S. costatus housed in the Museo Civico di Genova, Genova, Italy (MCGI) and California Academy of Sciences, San Francisco, California, United States of America (CASC). In this note we describe a female of S. costatus and discuss the species distribution and the taxonomic position of the genus.

A new genus and species of Orphninae associated with epiphytes in Andean cloud forest

Onorius inexpectatus

Frolov, A.V., Vaz-De-Mello, F.Z. 2015. A new genus and species of Orphninae (Coleoptera: Scarabaeidae) associated with epiphytes in an Andean cloud forest in Ecuador. Zootaxa, 4007 (3): 433–436

Orphninae (Coleoptera: Scarabaeidae) are represented in the New World by the tribe Aegidiini, which is comprised of four genera (Paulian 1984). Examination of material collected in Ecuador revealed a series of the Aegidiini specimens from an undescribed species that cannot be classified as a member of one of the known genera. The new species is herein described and a new genus is established. Apart from the distinctive morphological characters, the new taxon shows an unusual, for the Orphninae, association with canopy epiphytes.

Pages