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 quadridens sp.n. (Figs. 16, 17, 38, 42, 48, 65, 88a/b, 97) Habitus Fig. 16. Length 0.56 mm . Colour: brown, pubescence, legs and antennae yellow. Antonnomeres 3–11 length 0.16 mm , 5–7 ovoid, Fig. 42 . Width across eyes 0.17 mm . Mentum narrowed towards base, lateral margins straight; submentum with 3 setae, Fig. 38 . Pronotum: sides evenly rounded, widest at middle, with two clearly defined elongate depressions reaching from the base to just past the middle and with +/– 5 large punctures between, length 0.14 mm , width 0.21 mm , Fig. 17 . Elytra length 0.35 mm , width 0.27 mm . Mesoventrum: keel narrow between mesocoxae, extending on to the metaventrum, Fig. 48 . Mesepiventra: reticulation absent, angles rounded, Fig. 48 . Metaventrum: metepiventral sutures reaching to posterior margin Fig. 65 . Wings of usual ptiliid type . Male: Posterior intercoxal process of metaventrum with four flattened medial setae Fig. 97. Aedeagus Fig. 88a/ b. Female: [no spermatheca was found in the dissection of the female] Etymology . Named after the four prominent setae on the metaventral intercoxal process. Diagnosis : The distinctive pronotum and form of the male metaventral intercoxal process distinguish this species. 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.. Mounted on a piece of pinned acrylic as a disassembled slide ( UASC ) . Paratype: ♀, as holotype (BMNH).