Colletes fabiani, Zabel & Kuhlmann, 2023

Zabel, Tina & Kuhlmann, Michael, 2023, Taxonomic revision of the southern African Colletes fasciatus species group (Hymenoptera: Colletidae), European Journal of Taxonomy 899, pp. 1-96 : 24-31

Colletes fabiani sp. nov.

urn:lsid:zoobank.org:act:CC2563C3-EC07-467C-B891-D75B801A06A3

Figs 20–21 , 24

Diagnosis

The female can be separated from that of all other species with a normal scopa by the combination of the following characters: apical hair band of T2 about ½ width of disc ( Fig. 20D–E ), malar area narrow (⅓ width of mandibular base), facial fovea narrow (about width of antennal flagellum), T6 narrowly rounded and disc of T1 medio-anteriorly without numerous conspicuously short hairs interspersed

( Fig. 20D–E ), sternal discs covered with short hairs and apical tergal hair bands whitish ( Fig. 20D–E ). The male is best identified by the shape of S7 ( Fig. 21G ) and gonostylus ( Fig. 21H ).

Etymology

The species is dedicated to my (TZ) beloved husband Fabian Zabel, who always supported me in every way and thus gave me the opportunity to successfully complete my studies.

Material examined

Holotype SOUTH AFRICA – Northern Cape Province • ♂; 20 km W Sutherland, Farm Kanolfontein , road side; 32°24′43″ S, 20°27′28″ E; alt. 1385 m; 17 Sep. 2017; M. Kuhlmann leg.; SAMC.

Paratypes SOUTH AFRICA – Northern Cape Province • 1 ♀; 8 km WNW Leliefontein, Fynbos , road side; 30°15′58″ S, 18°03′17″ E; alt. 1190 m; 14 Sep. 2017; M. Kuhlmann leg.; CMK • 1 ♀; 30 km W Sutherland, 6 km NNW Farm Kanariesfontein, road side; 32°22′17″ S, 20°22′50″ E; alt. 1310 m; 17 Sep. 2017; M. Kuhlmann leg.; CMK • 3 ♂♂; same collection data as for preceding; 15 Sep. 2018; CMK . – Western Cape Province • 1 ♀; Wuppertal ; 32°17′ S, 19°13′ E; 8 Sep. 1987; C.D. Eardley leg.; CMK .

Description

Female

BODY LENGTH. 12 mm.

HEAD. Integument black, antenna dark brown ventrally. Face grayish to yellowish white, with brown hairs intermixed and with blackish hairs along inner eye margins and on vertex ( Fig. 20B ). Clypeus with dense, medium-sized punctures (0.2 pd) that are slightly elongate ( Fig. 20B ). Malar area narrow, length about ⅓ width of mandibular base. Facial fovea narrow, maximum width about antennal diameter.

MESOSOMA. Integument black, tarsi often brownish ( Fig. 20A ). Scutum with long grayish white to yellowish brown hairs intermixed with longer, dark brown hairs ( Fig. 20C ). Mesosomal sides with yellowish to grayish white hairs, intermixed with few brown hairs on mesepisternum. Legs yellowish white with brown hairs intermixed. Disc of scutum relative densely (1–3 pd) punctured, surrounded by dense (<0.5 pd) punctation, interspaces glabrous ( Fig. 20C ). Scutellum and metanotum with long, yellowish white hairs, on scutellum intermixed with brown hairs. Upper sloping part of propodeal triangle with short longitudinal carinae anteriorly, scabriculous posteriorly. Vertical part glabrous, anteriorly scabriculous. Scopa dark brown dorsally, yellow ventrally ( Fig. 20F ). Mid femora with distinct edge, stout ridge ventrally and brush of hairs basally.

METASOMA. Integument black, terga narrowly translucent posteriorly. T1–T3 with slight bluish shine. Disc of T1 densely covered with long, erect, yellowish white hairs, interspersed inconspicuously with a few short, yellowish white hair medio-anteriorly ( Fig. 20D ). Disc of T2 with short, erect, yellowish white hairs. T2 with very weak, narrow basal tomentum. Discs of T3–T5 with successively longer, erect, blackish hairs. T1–T5 with broad white posterior tergal hair bands, narrower on T1 medially ( Fig. 20E ). Disc of T1 with fine and dense punctures (0.5–1 pd), punctures much finer and denser on posterior tergal depression. Disc of T2 with very fine and dense punctation (<0.5 pd); glabrous between punctures. S2–S5 with long, yellowish white hair fringes, shorter medially. Discs of sterna densely covered with shorter, apically directed hairs.

Male

BODY LENGTH. 12–13 mm.

HEAD. Integument black, antenna dark brown ventrally. Face grayish white to white, intermixed with black hairs on vertex, along inner eye margins, some on supraclypeal area and light brown hairs between antennae ( Fig. 21B ). Clypeus very dense, small punctures (<0.2 pd) ( Fig. 21B ). Malar area narrow, length about ⅓ width of mandibular base. Facial fovea narrow, maximum width about antennal diameter.

MESOSOMA. Integument black, tarsi brownish ( Fig. 21A ). Scutum with long, grayish white to yellowish white hairs, with longer, dark brown hairs intermixed ( Fig. 21C ). Mesosomal sides grayish white, with brown hairs intermixed on mesepisternum. Legs with yellowish white hairs. Disc of scutum with medium-sized, scattered punctures (0.5–1 pd), integument glabrous, surrounded by dense punctation (<0.2 pd) ( Fig. 21C ). Scutellum and metanotum with long, yellowish white hairs, intermixed with dark brown hairs on scutellum. Upper sloping part of propodeal triangle with short longitudinal carinae anteriorly, scabriculous posteriorly. Vertical part slightly shagreened and shiny, with some more or less transverse carinae anteriorly. Hind basitarsus curved and broadened apically, with long yellowish bristles on dorso-apical edge ( Fig. 21F ). Dorsal half of inner side of hind basitarsus covered with hairs, ventral side glabrous. Second tarsus heart shaped, dorsal side is strongly broadened and rounded ( Fig. 21F ). Mid femora with right-angled edge on basal end, ventrally with long spine.

METASOMA. Integument black, terga very narrowly translucent posteriorly. T1–T3 with slight bluish shine. T1 densely covered with long, erect, yellowish white hairs ( Fig. 21D ). Disc of T2 with shorter, concolorous hairs, intermixed with brown hairs. Discs of T3–T6 with long, erect blackish hairs. T1– T5 moderately broad, white posterior tergal hair bands, that on T1 medially narrower ( Fig. 21E ). Discs of T1 and T2 fine punctured (0.5–1 pd), punctures becoming slightly finer towards posterior tergal depression, interspaces glabrous ( Fig. 21D ). S2–S5 with white hair fringes, significantly longer laterally than medially. Discs of sterna sparsely covered with very short yellowish white hairs. On S5 two elevations medio-laterally, also on S4 and S6 but less distinct. S6 with small brush of bristles laterally. S7 ( Fig. 21G ) and gonostylus ( Fig. 21H ) as illustrated.

Distribution

Found in mountainous regions of the Kamiesberg, Roggeveld and Cedarberg ( Fig. 24 ).

Phenology

Only found in September.

Figures

Fig. 20. Colletes fabiani sp. nov., ♀, paratype (CMK). A. Habitus, lateral view. B. Head. C. Scutum, dorsal view. D. Metasomal terga 1 and 2, dorsal view. E. Metasoma, dorsal view. F. Hind tibia, lateral view.

Fig. 21. Colletes fabiani sp. nov., ♂, paratype (CMK). A. Habitus, lateral view. B. Head. C. Scutum, dorsal view. D. Metasomal terga 1 and 2, dorsal view. E. Metasoma, dorsal view. F. Hind basitarsus, lateral view. G. Metasomal sternum 7, dorsal view. H. Gonostylus, lateral view.

Fig. 24. Distribution of C. cedarbergensis sp. nov., C. cyanonitidus Kuhlmann, 2007, C. denudatus Cockerell, 1946, C. eardleyi Kuhlmann, 2007, C. fabiani sp. nov. and C. fasciatus Smith, 1853.