Cissidium orami, 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 : 156-158

Cissidium orami sp. nov.

urn:lsid:zoobank.org:act:FB3A63B0-4A4B-4AE9-B1FF-613DAB219E74

Fig. 99

Etymology

I have pleasure in naming this species after my colleague Dr David Oram.

Material examined

Holotype

BRAZIL • ♀; Tainhas , R[io] G[rande] do Sul; Apr. 1959; F. Plaumann leg.; FMNH. Paratypes

BRAZIL • 5 ♀♀; same collection data as for holotype; one mounted verso; MMUE, BMNH.

Description

SIZE. Habitus ( Fig. 99A ), length 0.92 mm.

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

HEAD. Linear depression behind the eyes with a small median interruption, width across eyes 0.24 mm; antennomeres III–XI length 0.44 mm, III–IX length 0.21 mm, X–XI length 0.23 mm; mentum as Fig. 4B.

PRONOTUM. Length 0.24 mm, width 0.35 mm, sparsely pubescent, shallowly foveolate at base, without foveae; sides sharply angled, concave to acute hind angles, straight to rounded front angles, strongly bordered the border not continuing along the posterior margin, emargination opposite scutellum with sinuous angles ( Fig. 99B ).

ELYTRA. Length 0.59 mm, width 0.45 mm, pubescence a little denser than pronotum. MESOVENTRITE. Collar with a short broad median extension; mid-keel short, widest anteriorly, the angles joining with the collar to form two irregular depressions, the hind angles not reaching the mesocoxal anterior borders, raised medially with a strongly sculpted extension bearing ± eight setae; keel narrow, parallel-sided with rounded termination between the mesocoxae; mesoventral lateral margins with rounded convex extrusion at the posterior angle, without serrations; humeri sharply toothed ( Fig. 99C ).

METAVENTRITE. Length 0.17 mm, disc simple, width between spines 0.11 mm; margins of mesocoxal borders serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular slightly distorted.

Remarks

One of the five Brazilian species in this group. Distinguished by the bulbous angle of the mesoventral lateral margins.

Figures

Fig. 99. Cissidium orami sp. nov. A. Habitus. B. Pronotum, × 550. C. Mesoventrite showing median process of collar, mid-keel and keel, × 660.

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.