Diochus cleidecostae, a new species from the Brazilian Amazon and a discussion of the sexual dimorphism on sternum VIII (Coleoptera: Staphylinidae: Staphylininae: Diochini)

Abstract

Diochus Erichson is a worldwide rove beetle genus with species found in forest floor litter. Three species of Diochus were recently collected in northern Brazil, one of them considered as new and herein described. Within Diochus nanus-group, D. cleidecostae sp. nov. differs from D. apicipennis Cameron, D. nanus Erichson and D. perplexus Cameron by the aedeagus with clearing trifurcate apex of parameres; and differs from D. parvulus Kraatz by the three apical long setae of parameres distributed on ventral and dorsal lobes. A previous key to the D. nanus-group is updated to include the new species. Here we also report for the first time D. santacatarinae Irmler and D. parvulus from Pará state, Brazil. Finally, a discussion about the sexual dimorphism on sternum VIII is also provided for the genus.

Hexapoda Yearbook (Arthropoda: Mandibulata: Pancrustacea) Brazil 2020: the first annual production survey of new Brazilian species

“…A total of 680 new Brazilian species of Hexapoda were described in 2020, which are distributed among 245 genera, 112 families and 18 orders. These new species were published in a total of 219 papers (alencar & aZevedo 2020;almeida et al 2020aalvarado 2020;alveS et al 2020;ament et al 2020;amorim et al 2020;antuneS & takiya 2020;araujo & bravo 2020;Ávila Júnior et al 2020;baker & Haraty 2020;barboSa et al 2020;barbut 2020;barroS et al 2020abravo et al 2020;bellini et al 2020abenetti et al 2020abevilaqua & fonSeca 2020;biffi 2020biffi , biffi & GeiSer 2020braGa & ferreira-jr 2020;brown et al 2020;buSanello et al 2020;camacHo et al 2020;camarGo et al 2020;camarGoS et al 2020;camPaner & will 2020;camPoS et al 2020;caron et al 2020;carvalHo et al 2020;caSadei-ferreira et al 2020;caStro-HuertaS et al 2020;caStro-SouZa et al 2020acaterino & tiSHecHkin 2020;ceGolin et al 2020;cHaul 2020;ciPola et al 2020;clarkSon et al 2020;conStantini et al 2020;coSta et al 2020;curletti 2020;…”