Nossidium Erichson 1845

Darby, Michael, 2020, Eight new species of Ptenidiini and Discheramocephalini (Coleoptera: Ptiliidae) from Ecuador, European Journal of Taxonomy 599, pp. 1-19 : 2

Genus Nossidium Erichson 1845

Type species

Dermestes pilosellus Marsham, 1802 .

Diagnosis

Distinctive genus of Ptiliidae which agrees with Sindosium Johnson, 2007 (two species from the Solomon Islands and one from Sabah), Motschulskium Matthews, 1872 (one species from California) and Bicavella Johnson, 2007 (two species from the Solomon Islands) in having membranous wings without a clear medial constriction and aedeagi with parameres, but is separated from them by their more globular form and the absence of a clear waist at the junction of the elytra and pronotum. Three species of Nossidium have been described from Central and South America: N. issyae Darby, 2016 and N. schuelkei Darby, 2016 from Costa Rica and N. katyae Darby, 2015 from Bolivia. They differ from the two north American species I have studied, N. americanum, Motschulsky, 1868 and N. amoenum Motschulsky, 1868 , and from the two Palaearctic species N. pilosellum Marsham, 1802 and N. flachi Ganglbauer, 1898 , in being much rounder and less parallel-sided. No external features have been noted to distinguish males and females.