Cissidium yoruba, 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 : 71-72

Cissidium yoruba sp. nov.

urn:lsid:zoobank.org:act:473BE444-6BC1-42BC-B5A8-CE1EDC4C77E4

Fig. 45

Etymology

Named after Yoruba, the West African language. Ile-Ife, known as Ife, in Osun State, Nigeria is believed to be the oldest Yoruba speaking city. Noun in apposition.

Material examined

Holotype

NIGERIA • ♂; Ile-Ife ; 29 Dec. 1970; black light trap; J.T. Medlar leg.; MMUE.

Paratypes

NIGERIA • 2 ♀♀; same collection data as for holotype; one mounted verso; MMUE, BMNH.

Description

SIZE. Habitus ( Fig. 45A ), length 0.59 mm.

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

HEAD. With a shallow median depression between the eyes, width across eyes 0.21 mm;. antennomeres III–XI length 0.30 mm, III–IX length 0.16 mm, X–XI length 0.14 mm; mentum obscure.

PRONOTUM. Length 0.15 mm, width 0.24 mm, sparsely pubescent, without foveolae but with a row of ± four foveae along the posterior margin; sides sharply rounded not quite angled, then slightly concave to the rectangular hind angles, lateral borders wide, continued more thinly for a short distance along basal margin to the emargination in front of the scutellum ( Fig 45B , tilted forwards)

ELYTRA. Length 0.42 mm, width 0.33 mm, foveolate, densest in basal half, pubescence sparse.

MESOVENTRITE. Collar with a tapering median extension widening posteriorly; mid-keel parallel-sided, the posterior angles with short raised carinae to the mesocoxal anterior borders; keel without setae, narrow, slightly tapering to a point near base of mesocoxae; mesoventral lateral margins rounded, serrate posteriorly; humeri large, bluntly toothed ( Fig. 45C ).

METAVENTRITE. Length 0.15 mm, sparsely pubescent, disc simple, width across spines 0.11 mm; margins of mesocoxal cavities serrate.

WINGS. Macropterous.

GENITALIA. Male aedeagus not found in the dissection. Female spermatheca globular.

Remarks

The only species of Cissidium to have been described from Nigeria.

Figures

Fig. 45. Cissidium yoruba sp. nov. A. Habitus. B. Pronotum, × 640. C. Mesoventrite showing median process of collar, mid-keel, keel and lateral margin, × 1040.