Cissidium similatum, 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 : 165

Cissidium similatum sp. nov.

urn:lsid:zoobank.org:act:936AB769-443E-464C-B40D-A911A6E69ABF

Fig. 104

Etymology

Johnson ms name.

Material examined

Holotype

PERU • ♀; surroundings of Tarapoto; Franz leg.; MMUE.

Paratypes

PERU • 5 ex.; same collection data as for holotype; 1 ♀ mounted verso; MMUE, BMNH.

Description

SIZE. Habitus ( Fig. 104A ), length 0.71 mm.

COLOUR. Dark brown, shining, pubescence, legs and antennae dusky yellow.

HEAD. With a series of linear foveae between the eyes interrupted medially, width across eyes 0.20 mm; mentum parallel-sided; antennomeres III–XI, length 0.36 mm, III–IX length 0.16 mm, X–XI length 0.20 mm.

PRONOTUM. 0.19 mm long, 0.30 mm wide, sparsely pubescent and shallowly foveolate in basal half; lateral margins sharply angled then concave to acute hind angles, anterior angles strongly bordered and outstanding in dorsal view, lateral border not continuing along the basal margin, medial emargination opposite scutellum angulate ( Fig. 104B ).

ELYTRA. 0.47 mm long, 0.38 mm wide, pubescent as pronotum.

MESOVENTRITE. Without a medial extension of collar; mid-keel with concave sides, anterior angles meeting collar, posterior angles effaced before mesocoxa anterior borders, with a short, broad, angled posterior margin; keel with ± four setae, very wide tapering to a rounded termination close to base of mesocoxae; mesoventral lateral margins straight becoming effaced; humeri bluntly rounded ( Fig. 104C ).

METAVENTRITE. Sparsely pubescent, length 0.17 mm, disc simple, width across spines 0.13 mm; posterior margin of mesocoxae serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Males not known.

Remarks

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

Figures

Fig. 104. Cissidium similatum sp. nov. A. Habitus. B. Pronotum, × 400. C. Mesoventrite showing median process of collar, lateral margin, mid-keel and keel, × 470.