Scrapter glaberrimus ( Friese, 1912 )

Mack, Anne & Kuhlmann, Michael, 2023, Revision of the nitidus species group of the bee genus Scrapter Lepeletier & Serville, 1828 (Hymenoptera: Apoidea), European Journal of Taxonomy 912, pp. 1-119 : 36-38

Scrapter glaberrimus ( Friese, 1912)

Figs 25–26

Strandiella glaberrima Friese, 1912: 183 , lectotype ♂ [designated by Eardley 1996] (type locality: Port Nolloth, South Africa) (SAMC), examined.

Diagnosis

The male of S. glaberrimus can be separated from that of all other species of this group by the following character combination: dense (i = 0.2 d) punctation on basal third to half of disc of T2 ( Fig. 26A ), apically at most 15 points medially of this tergum ( Fig. 26A ), punctation coarse; anteriorly on propodeum carinae, apically coriaceous ( Fig. 25C ); each tergum slightly curved from anterior to posterior ( Fig. 25A ). The female is unknown.

Additional material examined

No additional material examined.

Description

Female

Unknown.

Male

BODY LENGTH. 6.6 mm.

HEAD. Wider than long. Integument black, mandibles dark brownish to reddish. Face densely covered with long, white, erect hair. Malar area medially narrow, slightly curved.

MESOSOMA. Integument black. Scutum regularly and densely (i = 1–1.5 d) punctate; surface between punctures smooth and shiny ( Fig. 25B ). Anterior half of propodeum coarsely areolate, posterior half coriaceous, matt ( Fig. 25C ). Scutum, scutellum, metanotum, mesepisternum and propodeum sparsely covered with long, brownish to greyish, erect hair.

WINGS. Yellowish-brown, stigma and wing venation dark brownish ( Fig. 25A ).

LEGS. Integument dark brownish, fore and mid tibia with yellow spot. Tarsi slightly lighter than rest of the legs. Vestiture greyish-white ( Fig. 25A ).

METASOMA. Integument brownish, marginal zones narrow and light brownish. Disc of T1 without hair ( Fig. 26A ), T2–T4 basally greyish, dense, short, erect hair band, covering third to half of terga, which covers more of terga the farther posterior it is. T3–T4 anterior of premarginal line with row of short, erect, greyish hair ( Fig. 25D ). T2–T4 basally more densely (i = 0.3 d) and much finer punctate than apically (i = 1–4 d); medially more densely than laterally. About 10 points medially on T2 ( Fig. 26A ). T3 anterior of premarginal line with a dispersed row of points ( Fig. 25D ).

TERMINALIA. Genitalia ( Fig. 26B ), S7 ( Fig. 26C ) and terminal plate of S8 ( Fig. 26D ) as illustrated.

Distribution

Only known from NW Namaqualand.

Floral hosts

Unknown.

Seasonal activity

September.

Remarks

Eardley (1996) synonymised this species with S. opacus .

Figures

Fig. 25. Scrapter glaberrimus (Friese, 1912), lectotype, ♂ (SAMC). A. Lateral view. B. Scutum and scutellum (dorsal view). C. Metanotum and propodeum (dorsal view). D. Metasoma (dorsal view).

Fig. 26. Scrapter glaberrimus (Friese, 1912), lectotype, ♂ (SAMC). A. Terga 1–2 (dorsal view). B. Genitalia (dorsal view). C. Sternum 7. D. Sternum 8.