Cissidium peruviense, Darby, 2020

Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, European Journal of Taxonomy 622, pp. 1-188 : 158-159

Cissidium peruviense sp. nov.

urn:lsid:zoobank.org:act:B8474470-95D2-499D-AC25-C85C29FB795D

Fig. 100

Etymology

Named after the country where the specimens were collected.

Material examined

Holotype

PERU • ♀; Cusco Dept, Villa Carmen Field Station , 1.7 km west of cafeteria research transect; 12.89250 S, 71.41917 W; 555 m a.s.l.; 21–22 May 2011; D.J.Bennett and E. Razuri leg.; MUSM.

Paratypes

PERU • 3 ex.; same collection data as for holotype; one mounted verso, one missing elytron, one missing both elytra; MUSM, SEMC, BMNH • 1 ex., same collection data as for holotype but flight intercept trap; 26–28 May 2011; mounted verso; BMNH • 1 ex., same collection data as for holotype as for preceding but 22–24 May 2011; missing elytron; BMNH .

Description

SIZE. Habitus ( Fig. 100A ), length 0.70 mm.

COLOUR. Yellow brown, shining, antennae, legs and pubescence yellow.

HEAD. With a shallow setose depression behind the eyes, width across eyes 0.20 mm; antennomeres III–XI length 0.31 mm, III–IX length 0.17 mm, X–XI length 0.14 mm; mentum as Fig 4B.

PRONOTUM. Length 0.19 mm, width 0.26 mm, sparsely pubescent, without either foveae or foveolae; sides angulate concave to rectangular hind angles, straight to rounded front angles, strongly bordered the border not continuing along the posterior margin, emargination opposite scutellum sinuate ( Fig. 100B ).

ELYTRA. Length 0.42 mm, width 0.36 mm, pubescence a little denser than pronotum, shallowly foveolate most noticeable in anterior half.

MESOVENTRITE. Collar with a short broad medial extension; mid-keel with concave sides, the hind angles with carinae reaching the mesocoxal borders, sharply raised medially with ± three setae; keel tapering to parallel-sided before a pointed tip at interruption point of mesocoxal borders; mesoventral lateral margins angulate with rounded convex extrusion at the angle, without serrations; humeri sharply toothed ( Fig. 100C ).

METAVENTRITE. Length 0.15 mm, with scattered pubescence, female disc simple, male medially depressed, width between spines 0.12 mm; margins of mesocoxal cavities serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular.

Remarks

Distinguished from the other species of smaller Peruvian Cissidium by a clearly marked median extension of the mesoventral collar.

Figures

Fig. 100. Cissidium peruviense sp. nov. A. Habitus. B. Pronotum, × 625. C. Mesoventrite showing median process of collar, mid-keel and keel, × 715.

Fig. 4. Menta and submenta. A. Cissidium petri Darby, 2015, × 1380. B. Cissidium tigrum Darby, 2015, × 1220. C. Cissidium amboroense Darby, 2015, × 1260. D. Cissidium losbanos sp. nov., × 1100. E. Cissidium triangulum Darby, 2019, × 650. F. Cissidium pilosellum sp. nov., × 1420.