Cissidium opacum, 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 : 122-123

Cissidium opacum sp. nov.

urn:lsid:zoobank.org:act:90BBF05F-D923-469D-9978-964396963C0F

Fig. 77

Etymology

Johnson ms name, from the Latin adjective ‘ opacus ’, meaning ‘shady’ or ‘dark’.

Material examined

Holotype

SOUTH AFRICA • Cape Prov. Peninsula, Table Mt., Bats Cave , wood humus; Dec. 1960, N. Leleup leg.; ZA.43; MMUE.

Description

SIZE. Habitus ( Fig. 77A ), length 0.71 mm.

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

HEAD. With a narrow impressed line behind the eyes; width across eyes 0.21 mm; antennomeres III–XI length 0.29 mm, III–IX length 0.19 mm, X–XI length 0.10 mm, antennomere XI without a median separation; mentum obscured.

PRONOTUM. Length 0.20 mm, width 0.29 mm, densely pubescent; sides angulate in posterior third, evenly rounded anteriorly, with short concave margins posteriorly before the rounded rectangular hind angles, sides narrowly margined the margins not continued along the base, base straight in front of scutellum without an emargination ( Fig 77B ).

ELYTRA. Length 0.45 mm, width 0.34 mm, densely pubescent, not foveolate.

MESOVENTRITE. Collar with a long tapering median extension; mid-keel parallel-sided posterior angles rounded, rising slightly at junction with keel; keel with ± seven setae, tapering to a point at base of mesocoxae; mesoventral lateral margins smoothly rounded without serrations; humeri narrow, not noticeably toothed ( Fig. 77C ).

METAVENTRITE. Length 0.16 mm, width between spines 0.09 mm; margins of mesocoxal cavities serrate.

WINGS. Macropterous.

Sex not determined.

Remarks

The only species of Cissidium to have been described from South Africa.

Figures

Fig. 77. Cissidium opacum sp. nov. A. Habitus. B. Pronotum, × 550. C. Mesoventrite showing median process of collar, mid-keel and keel, × 945.