Micridium inornatum, Darby, Michael, 2017

Darby, Michael, 2017, 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, Zootaxa 4242 (2), pp. 233-254 : 244

Micridium inornatum sp. n.

( Figs. 18, 47, 80)

Antennomeres 3–11 length 0.26 mm, 4–8 elongate, narrowed towards base. Width across eyes 0.22 mm. Mentum lateral margins almost parallel with slight medial insinuations, submentum with 3 setae. Pronotum without sculpture or depressions, sides evenly rounded, hind angles almost obscured, length 0.17 mm, width 0.28 mm, Fig. 18. Scutellum without any distinctive features. Mesoventrum: keel between mesocoxae wide and flattened, Fig. 47. Mesepiventra with distinct reticulation, Fig. 47. Mesocoxae widely separated, Fig. 47. Metaventrum: metepiventral sutures reaching midpoint only, posterior intercoxal process straight between lateral points. Wings of usual ptiliid type.

Male: not known.

Female: spermatheca Fig. 80.

Etymology. After the smooth appearance of the pronotum lacking linear depressions.

Diagnosis. The wide separation of the mesocoxae will quickly separate this species from all others except johnsoni and elegans .

Type data: Holotype: ♀, Bolivia, Cochabamba, BOL / Nov 2013/03. ca 8km E of Villa Tunari, sifting rotten wood, Winkler app. extr., GPS 23 S. 16° 59' 12" E. 65° 20' 47", 298m, 22.xi.2013. P. Baňař lgt. ( UASC). Pinned on a small piece of clear acetate as a disarticulated slide using Euparal as the mountant . Paratype: ♀, same data as holotype ( MMBC); the specimen was found with the elytra missing.