Calvariopsis wittmeri, Ruta, 2019

Ruta, Rafał, 2019, Calvariopsis gen. nov., a new genus of Neotropical Scirtidae (Coleoptera: Scirtoidea), Zootaxa 4604 (1), pp. 1-41 : 33-34

publication ID	https://doi.org/ 10.11646/zootaxa.4604.1.1
publication LSID	lsid:zoobank.org:pub:E6D82300-8DC6-4560-A945-8F29D3B3D501
persistent identifier	https://treatment.plazi.org/id/71140E6C-F249-1417-73B5-EE7754FF29D5
treatment provided by	Plazi
scientific name	Calvariopsis wittmeri
status	sp. nov.

Treatment

Calvariopsis wittmeri sp. nov.

( Figs 1X View FIGURE 1 , 26 View FIGURE 26 )

Type material. Holotype, male ( ANIC): “ Rio de \ 8/49 \ Janeiro \ Brasil \ Wittmer ” . Paratype, male ( ANIC): “ R. de Janeiro \ Brazil \ W. Wittmer ” .

Diagnosis. Small (TL 2.1–2.4 mm), body widest in anterior half of elytra, externally resembling C. saopau- lense sp. nov. Identification is possible only on the basis of morphology of male genitalia: basal portion of tegmen rectangular, penis curved in lateral view (unique among known members of the genus), pala of penis rectangular, parameroids relatively wide in apical portions, tergite VIII with widely U-shaped emargination in apical plate.

Description. Holotype, male. Body oblong oval, convex, covered with whitish, suberect setae. Head brown, pronotum, scutellar shield and elytra light brown, legs, antennae and mouthparts yellowish. Head very broad, 1.7× wider than width of interocular space, with fine punctation, punctures small, not granulate, separated by 2.0–3.0× diameter of a puncture, eyes moderately large, not protuberant. Pronotum transverse, widest at its base. Disc of pronotum with fine, not granulate punctation, punctures separated by ca. 3.0–4.0× diameter of a puncture. Posterior margin of pronotum subtly bisinuate. Anterior angles protruding anteriorly, subtriangular, posterior angles obtuse. Scutellar shield subtriangular, covered with subtle punctation. Elytra oblong, without traces of longitudinal ridges, widest slightly before the middle of their length, sides curved, regularly converging to apex in posterior 1/3. Humeri well marked. Punctation much stronger than on pronotum, punctures elongate, distance between punctures ca. 0.7–1.0× diameter of a puncture.

Male genitalia. Penis (L 0.60 mm, W 0.17 mm, Figs 26 View FIGURE 26 A–B) distinctly curved in lateral view, with subparallel sides, parameroids subrectangular in basal portion, with subtriangular apices, trigonium subtriangular, with rhomboidal basal part. Tegmen (L 0.37 mm, W 0.19 mm, Fig. 26C View FIGURE 26 ) U-shaped, without apodemes in basal portion, apices of parameres pointed, not setose. Sternite IX (L 0.31 mm, W 0.21 mm, Fig. 26D View FIGURE 26 ) oval, with single apodeme which is only slightly shorter than apical plate, numerous long setae present on apical and lateral margins. Tergite VIII (L 0.31 mm, W 0.28 mm, Fig. 26E View FIGURE 26 ) with wide, U-shaped emargination of apical margin, apical margin not setose, apodemes as long as apical plate. Tergite IX (L 0.32 mm, W 0.32 mm, Fig. 26F View FIGURE 26 ) with membranous and relatively narrow apical plate, apodemes as long as apical plate, strongly diverging.

Female. Unknown.

Variability. Colouration variable, paratype much darker than holotype, brownish-black.

Measurements and ratios. Males (n = 2) TL 2.07–2.40 (2.24) mm, PL 0.47–0.50 (0.49) mm, PW 1.00–1.10 (1.05) mm, EL 1.77–2.07 (1.92) mm, EW 1.33–1.47 (1.40) mm, TL/EW 1.55–1.64 (1.59), PW/PL 2.14–2.20 (2.17), EL/EW 1.33–1.41 (1.37), EL/PL 3.79–4.13 (3.96).

Distribution. Known only from Rio de Janeiro, Brazil.

Etymology. Named after Walter Wittmer (1915–1998), curator in the Naturhistorisches Museum Basel, a devoted coleopterist and specialist in the taxonomy of several families of beetles and collector of the type specimens.