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 boliviense sp.n. ( Figs. 11 , 19 , 35 , 49 , 73 ) Habitus Fig. 11 . Length 0.63 mm . Colour: dusky yellow, head a little darker, pubescence, legs and antennae pale yellow. Antennomeres 3–11 length 0.20 mm , 4–8 ovoid. Head with group of shallow depressions on disc. Width across eyes 0.18 mm . Mentum narrowed to base, sides straight, submentum with 3 setae, Fig.35 . Pronotum with two distinct linear depressions in basal half converging anteriorly, sides evenly rounded, length 0.16 mm , width 0.23 mm , Fig. 19 . Elytra widest at middle, length 0.36 mm , width 0.27 mm . Mesoventrum: keel narrow between mesocoxae, Fig. 49 . Mesepiventra without clear reticulation, evenly rounded to mesocoxae, Fig. 49 . Metaventrum: metepiventral sutures not reaching posterior margin, posterior intercoxal process shallowly concave. Wings absent. Male: not known. Female: spermatheca in the form of the number 8, Fig. 73 . Etymology . Named after the country where the insect was found. Diagnosis . The form of the pronotal linear depressions, the absence of wings, and the shape of the spermatheca distinguish the species. Type data : Holotype : ♀ , Bolivia , Santa Cruz dep. W. Amboro NP Barientos , BOL / Nov 2013/13 , 1583m, 29.xi , sifting litter palms, S. 18° 06' 11" E . 63° 48' 09", Winkler app. extr. P. Baňař lgt. ( UASC ) .