Micridium quadridens, 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 : 250

publication ID	https://doi.org/ 10.11646/zootaxa.4242.2.2
publication LSID	lsid:zoobank.org:pub:0DD1868D-4EF5-4FB7-AEE9-372644800A79
DOI	https://doi.org/10.5281/zenodo.6045222
persistent identifier	https://treatment.plazi.org/id/03E64B08-E339-FFE5-8585-5A03FB27EDF2
treatment provided by	Plazi
scientific name	Micridium quadridens
status	sp. nov.

Treatment

Micridium quadridens View in CoL 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 View FIGURES 42 – 46 . Width across eyes 0.17 mm. Mentum narrowed towards base, lateral margins straight; submentum with 3 setae, Fig. 38 View FIGURES 33 – 41 . 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 View FIGURES 17 – 32 . Elytra length 0.35 mm, width 0.27 mm. Mesoventrum: keel narrow between mesocoxae, extending on to the metaventrum, Fig. 48 View FIGURES 47 – 60 . Mesepiventra: reticulation absent, angles rounded, Fig. 48 View FIGURES 47 – 60 . Metaventrum: metepiventral sutures reaching to posterior margin Fig. 65 View FIGURES 61 – 71 . 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).