Petrotrichis rotundata sp. n. (Figs. 10 A–O) Habitus Fig 10 A. Length 0.73 mm. Colour dark brown/black, appearing shining and polished, pubescence pale yellow, antennae and legs dusky yellow. Antennomeres 3–11 0.34 mm long, 10–11 with bunches of 2/3 sensillae, Fig. 10 C, 2N. Mentum and submentum chaetotaxy Fig. 10 D. Width across eyes 0.33 mm. Pronotum 0.51 mm wide, 0.27 mm long, lacking obvious microsculpture Fig. 10 M, sides with a small tooth at the hind angle, Fig. 10 O, and more sharply rounded in basal third, Fig. 10 D. Elytra 0.46 mm long, 0.50 mm wide. Scutellum and metascutellum Fig. 10 L. Meso- and metaventra Fig. 10 H. Pygidium lacking setae on anterior margin and without a central point on the posterior margin, Fig. 10 I. Male: aedeagus Fig. 10 F; ventrite 6 with elongate incision and a pair of stout horn-like setae at the corners Fig. 10 K; ventrite 7 Fig. 10 G; front tibia with a dense patch of short hooked setae Fig. 10 J. Female: spermatheca Fig. 10 E Etymology. From the Latin rotundatus meaning rounded. Type data: Holotype: ♂, GPS23, BOL / Nov. 2013/03., Bolivia Cochabamba dep., ca 8 km E of Villa Tunari, 296m, 22.xi.2013, S. 16°59'12" E.65°20'47", sifting rotten wood, Winkler app. extr., P.Baňař lgt. (UASC). Paratypes: 1 ex. same data as holotype (UASC / MMBC); 2 exs, GPS24, BOL / Nov. 2013/03., Bolivia Cochabamba dep., ca 8 km E of Villa Tunari, 225m, 23.xi.2013, S. 16°59'11" E.65°20'44", sifting litter, Winkler app. extr., P.Baňař lgt. (UASC / MMBC); 11 exs, GPS27, BOL / Nov. 2013/06., Bolivia, 24.xi.2013, Cochabamba dep.,Cristal Mayu river valley ca 20 km E of Villa Tunari, sifting litter, ca 720m,Winkler app. extr., P.Baňař lgt. (BMNH); 1 ex, GPS31, BOL / Nov 2013/08, Bolivia 2013, Santa Cruz dep., W. Amboro NP, Siberia Pass env., 2481m, 28.xi, S. 17°50'25" E.64°41'58", sifting litter, Winkler app. extr., P.Baňař lgt. (UASC / MMBC); 24 exs, GPS38, BOL / Nov. 2013/13, Bolivia 2013, Santa Cruz dep., W. Amboro NP, Barientos, 1883m, 29.xi, S. 18°06'11" E.63°48'09", sifting litter, palms, Winkler app. extr., P.Baňař lgt. (UASC / MMBC, BMNH); 48 exs, GPS36, BOL / Nov 2013/11, Bolivia 2013, Santa Cruz dep., W. Amboro NP, Barientos, 1817m, 29.xi, sifting litter, S. 18°06'00" E.63°48'05", Winkler app. extr., P.Baňař lgt. (UASC / MMBC); 114 exs, GPS37, BOL / Nov 2013/12, Bolivia 2013, Santa Cruz dep., W. Amboro NP, Barientos, 1813m, 29.xi, sifting litter, S. 18°06'06" E.63°48'08", Winkler app. extr., P.Baňař lgt. (UASC / MMBC, BMNH).

Published as part of Darby, Michael, 2015, Studies of Bolivian Ptiliidae (Coleoptera) 2: The subfamily Acrotrichinae including two new genera Petrotrichis and Microtrichis, and eight new species of Acrotrichis, pp. 190-210 in Zootaxa 3999 (2) on page 204, DOI: 10.11646/zootaxa.3999.2.2, http://zenodo.org/record/241696