Colletes denudatus Cockerell, 1946, 1945

Kuhlmann, Michael, 2007, Revision of the bees of the Colletes fasciatus-group in southern Africa (Hymenoptera: Colletidae), African Invertebrates 48 (2), pp. 121-166 : 139-140

Colletes denudatus Cockerell, 1946

Figs 36, 37 , 41

Colletes denudatus: Cockerell 1945 (1946) : 839. Type locality: South Africa, Matjesfontein .

Diagnosis: Male is best identified by the unique shape of S7 ( Fig. 36 ) and gonostylus ( Fig. 37 ).

Description:

Male.

Length 11–13 mm.

Vestiture: Face greyish white to white hairs; mesonotum with long, greyish white to white hairs; mesosomal sides and legs white, scutellum and metanotum with long, yellowish brown hairs, scutellum intermixed with few black hairs; base of hind femora with a dense row of white, erect hairs, all of equal length more or less along longitudinal axis; T1 densely covered with long, erect yellowish white hairs; disc of T2 with shorter, concolorous hairs; discs of T3–T6 with long, erect, blackish hairs; T1–T5 with narrow, very sparse, white posterior tergal hair bands; T2–T5 laterally with few, very long, erect hairs; S1–S5 with loose fringes of moderately long hairs laterally, not longer than medially, discs with moderately long, erect, white hairs; S6 with a very small, elongate brush of dense short white bristles basolaterally, medially with long, curved hairs towards the median line.

Integument: Completely black, except tarsi reddish brown and terga narrowly translucent posteriorly; malar area short, about 3/4 as long as width of mandibular base; clypeus with very dense, small punctures (<0.2 pd); facial fovea narrow, maximum width about antennal diameter; disc of mesonotum medium-sized, relatively densely punctate (0.5–1 pd), integument between punctures glabrous, surrounded by slightly denser punctation; upper sloping part of propodeal triangle with short, longitudinal carinae, vertical part densely shagreened and relatively dull; basitarsus of hindleg modified, with a slight longitudinal bend and broadened apically, with prominent, long, reddish bristles on dorso-apical edge; basitarsus ventrally with long, orange bristles apically; integument of T1–T2 dull, with relative coarse, dense (<0.5 pd) punctation, largely absent on nearly glabrous posterior tergal depression. Shape of S7 as in Fig. 36 and shape of gonostylus as in Fig. 37 .

Female. Unknown.

Type material examined: Colletes denudatus , ơ holotype: ‘B.M. Type Hym. 17.a.1419, Colletes denudatus Ckll. Type, Cape Province; Matjesfontein, 6–15.x.1928, S.Africa.R.E.Turner. Brit.Mus. 1928-480’ (BMNH). Additional material examined: 5ơ. SOUTH AFRICA: Northern Cape: 1ơ Hester Malan Nat. Res., 14.ix.1985, M. Struck, on Leipoldtia schultzei (SANC) ; 1ơ 5.ix.1985, idem; 1ơ Hester Malan Nat. Res., 30.ix.1985, M. Struck, on Ruschia cymosa (CMK) ; 1ơ Nieuwoudtville, Wild Flower Reserve, 27.vii.1986, V.B. Whitehead, on Othonna (SAMC) ; 1ơ 21.vii.1986, idem (CMK).

Distribution: Only recorded from three localities scattered over the entire winter rainfall area ( Fig. 41 ).

Flower visiting: Leipoldtia schultzei , Ruschia cymosa (Aizoaceae) , Othonna sp. (Asteraceae) .

Phenology: First record 21 st July, last record 15 th October.

Figures

Figs 28–39. Shapes of male S7 and gonostylus: (28, 29) C. knersvlaktei sp. n.; (30, 31) C. cyanonitidus sp. n.; (32, 33) C. nieuwoudtvillei sp. n.; (34, 35) C. katharinae sp. n.; (36, 37) C. denudatus; (38, 39) C. karooensis sp. n. Scale bar = 0.5 mm.

Fig. 41. Distribution of C. denudatus, C. eardleyi, C. fasciatus, C. genalis, C. gessi and C. infracognitus.