The types of all species belonging to the genus Goniadera Perty, 1830 are studied. The lectotype of Melandrya repanda Fabricius, 1801, is designated. Eight new species of Goniadera are described: Goniadera ardoini sp. nov., Brasil, G. barclayi sp. nov., Brasil and Peru, G. girardi sp. nov., G. jaegeri sp. nov., G, merkli sp. nov., Brasil, G. onorei sp. nov. from Ecuador, G. peseudorepanda sp. nov. from Costa Rica and Mexico and G. ñoresi sp. nov. from Argentina. Goniadera simplex Fairmaire, 1889 is transferred to Aemyone Bates, 1868, but this genus is degraded to sub-genus of Goniadera. The name Goniadera (Aemyone) simplex (Fairmaire, 1889) comb, nov., is proposed. The genus Opatresthes Gebien, 1928 is studied and considered as another subgenus of Goniadera. Goniadera tuberculifera Fairmaire, 1889 is trasferred to this genus, the new name Goniadera (Opatresthes) tuberculifera (Fairmaire, 1889) comb, nov., is proposed. A new species from Nicaragua: Goniadera (Opatresthes) maesi sp. nov. is described. A key to separate all sub-genera and species is provided. Etaceta aeneicolor Fairmaire, by monotypy is excluded from the tribu Goniaderini and its position in the tribu Lupropini sensu Ardoin (1969) is confirmed. New synonymies are recognised: Goniadera simplex Fairmaire (= Aemyone bordoni Marcuzzi, 1994) syn. nov., Aemyone cariosa Fairmaire, 1873 (= Anaedus striatipennis Pic, 1917) syn. nov. and (Aemyone silvanae Marcuzzi, 1994) syn. nov.; Aemyone crenata Champion, 1886 becoming homonymie with Goniadera crenata Perty, 1830 is changed in Goniadera (Aemyone) championi nom. nov.
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La totalité des types des espèces du genre Goniadera Perty, 1830 sont étudiés. Le lectotype de Melandrya repanda Fabricius, 1801 est désigné. Huit espèces nouvelles sont décrites: Goniadera ardoini sp. nov. du Brésil, G. barclayi du Brésil et Pérou, G. girardi sp. nov., G. jaegeri sp. nov. et G. merkli sp. nov., Brésil, G. onorei sp. nov. du Equateur,pseudorepanda sp. nov. du Costa Rica et du Mexique, et G. ñoresi sp. nov., d'Argentine. Goniadera simplex Fairmaire, 1889 est transféré dans le genre Aemyone Bates, 1868, considéré comme un sous-genre de Goniadera, le nom Goniadera (Aemyone) simplex (Fairmaire) comb. nov. est proposée. Goniadera tuberculífera Fairmaire, 1889 est transférée dans le genre Opatresthes Gebien, 1928, qui est également considéré comme un sous-genre de Goniadera. Le nouveau nom Goniadera (Opatresthes) tuberculífera (Fairmaire, 1889) comb. nov. est proposé. Une nouvelle espèce du Nicaragua, Goniadera (Opatresthes) maesi sp. nov. est décrite. Une clé pour séparer tous les sous- genres et espèces est donnée. Etaceta aeneicolor Fairmaire est exclu de la tribu des Goni- aderini et sa position dans celle des Lupropini sensu Ardoin (1969) est confirmée. Des synonymies nouvelles sont établies: Goniadera simplex Fairmaire (= Aemyone bordoni Marcuzzi, 1994) syn. nov., Aemyone cariosa Fairmaire, 1873 (= Anaedus striatipennis Pic, 1917) syn. nov. et (= Aemyone silvanae Marcuzzi, 1994) syn. nox Aemyone crena- ta Champion, 1886 tombe en homonymie avec Goniadera crenata Perty, 1830 le nom est changé, devenant Goniadera (Aemyone) championi nom. nov.
The type material of the species belonging to the genus Tauroceras Hope, 1840 and Tauroceropedus Pic, 1913 is studied and all the known taxa are revised. Tenebrio cornutum Fabricius, 1775 (genus Tauroceras) is redescribed on the basis of type material discovered in the Hunterian collection (1718-1783) of the Museum of Zoology, University of Glasgow, Scotland. The strange locus typicus "Smyrna" is found not to be Izmir in Turkey, but more probably a locality in the old scotish colony of Florida. Lectotypes are designated for the following taxa: Tenebrio aries Dalman, 1823, Tenebrio angulatum Perty, 1830, Tauroceras angulatum Pic, 1913, syn. nov. and T. angulatum var. nitidus Pic, 1913, syn. nov. Six new species are described: Tauroceras evasprecherae sp. nov. from Brazil, T. girardi sp. nov. from Central America, T. barclayi sp. nov. from Jamaica, T. tichyi sp. nov. from Ecuador, T. noelmali sp. nov. from Colombia and Bolivia, T. lucifer sp. nov. from Brazil, Colombia and Ecuador. The genus Tauroceropedus Pic, 1913 syn. nov. is considered as a junior synonym of Tauroceras Hope, 1840. The formerly unknown male of Tauroceras (= Tahroceropedys) rugosicollis (Pic, 1913) comb. nov. is described from French Guyana. Figures and keys to identify all species are given. The genus Tauroceras is maintained within the tribe Centronopini in the subfamily Tenebrioninae, sensu Doyen (1980).
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