Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar Author Darby, Michael text Zootaxa 2017 4242 2 233 254 journal article 36307 10.11646/zootaxa.4242.2.2 c4e5d710-edf2-4928-b53d-22c211fcad53 1175-5326 376374 0DD1868D-4EF5-4FB7-AEE9-372644800A79 Micridium elegans sp.n. ( Figs. 8 , 23 , 36 , 44 , 57 , 66 , 74 , 83a/b) Habitus Fig. 8 . Length 0.66 mm . Colour: dark, almost black, pubescence, antennomeres and legs brown. Antennomeres 4–8 widest medially and narrowed before base and apex; length of 3–11 0.29 mm , Fig. 44 . Width across eyes 0.20 mm . Mentum narrowed towards base, sides straight, submentum with 3 setae, Fig 36 . Pronotum length 0.14 mm , width 0.24 mm , widest in front of middle, with two distinct linear depressions in basal half narrowed anteriorly, Fig. 23 . Elytra length 0.44 mm , width 0.29 mm . Mesoventrum: collar without clear humeri, keel flattened between mesocoxae, Fig. 57 . Mesepiventra without clear reticulation, smoothly rounded to mesocoxae which are more widely separated than species with a narrow keel, Fig. 57 . Metaventrum: metepiventral sutures close to lateral margins and reaching posterior margin, Fig. 66 , posterior intercoxal process straight between lateral points. Wings of usual ptiliid type . Male: aedeagus strongly humped with a large median and two shorter lateral projections Figs. 83 a/b. Female: spermatheca Fig. 74 . Etymology . Named after the rather elegant appearance of the species. Diagnosis . The very dark colour, length of antennomeres 4–7, lack of mesoventral humeri, and form of both the female and male genitalia quickly distinguish this species. Type data : Holotype : ♀ , Peru , Cusco Dept., Villa Carmen field station, 1.7 km west cafeteria research transect, Flight intercept trap , 12.89250S 71.41917W , 555m , 21–22.v.2011 , D.J.Bennett & E. Razuri ( MUSM ) . Paratypes : 6 examples, same data as holotype ( MUSM , SEMC , BMNH ) .