Anthidiellum (Pycnanthidium) bipectinatum Pasteels

Eardley, Connal, 2018, Taxonomic revision of the sub-Saharan Anthidiellum Cockerell (Apoidea: Megachilidae: Anthidiini), Zootaxa 4402 (2), pp. 201-250 : 239-240

Anthidiellum (Pycnanthidium) bipectinatum Pasteels

( Figs 29–31 )

Anthidiellum (Pygnanthidiellum) bipectinatum PAStEELS, 1984: 97, 105–106, MALE HOLOtyPE (AMNH, EXAMINED) NEAR GOLLEL, SOUtH AFRIcA.

Anthidiellum (Pygnanthidiellum) bipectinatum PAStEELS: MIcHENER AND GRISWOLD 1994: 301.

Diagnosis. Among the species-group identified by the upper female clypeus edge being more or less horizontal ( Fig. 1b ), the female of A. bipectinatum has a completely yellow supraclypeus. In A. sternale and A. apicatum , they are at least partly black. The male T7 is broadly and obtusely convex, in dorsal view (devoid of a mediologitunal keel, which occurs in A. sternale and A. apicatum ). The S5 lateral comb is uniquely wide (about 20 setae) and comprises long setae.

Description. Female. Integument black with variable pale yellow maculation on lower face (mediolongitudinal interantennal socket area black), fleck on posterior vertex, posterolateral scutellum, dorsoproximal fore and middle tibiae, outer surface hind tibia (mesoanterior region blackish or orangish), outer hind basiatasus (circumference orangish), lateral T1–T3, lateral and dorsolateral T4–T5, entire T6; T4–T5 distal margins black or translucent orange ( Fig. 29a–c ), metasomal venter orangish. Scopa very pale yellow. Lengths: face 2.3–2.6 mm; scutum 1.8–2.2 mm; forewing 5.2–5.6 mm; body 6.1–6.6 mm. Structure. Head. Epistomal suture flattish above ( Fig. 1b ); lower epistomal suture projection mesad to between antennal sockets ( Fig. 1b ); preoccipital area round; omaulus carinate; fore and middle femora with sparse, simple vestiture posteriorly; hind basitarsus wide (length 1.5x width); propodeum coarsely striate dorsolaterally, vertical surface punctate above, shiny below; distal margins of T4–T5 impunctate.

Male. Integument black with variable pale yellow maculation on lower face (mediolongitudinal interantennal socket area black), mandible, pronotal lobe, proximal and distal ends of outer surfaces of tibiae, outer hind basitarsus, lateral T1–T3, most T4, entire T6–T7; distal margins of T1–T2 black and on T3–T6 translucent orange (Fig. 30a–c), metasomal venter blackish (Fig. 30d). Lengths: head 2.5–2.8 mm; scutum 1.8–2.0 mm; forewing 5.6– 6.7 mm; body 5.7–6.7 mm. Structure. Head. Preoccipital region rounded on gena; omaulus carinate; forebasitarsus fringe with long posterior fringe; propodeum coarsely striate dorsolaterally, vertical surface punctate above, shiny below; T1–T5 distal margins impunctate; T6–T7 dorsal surfaces unmodified; T7 distal edge broadly convex (dorsal and ventral views) (Fig. 30c); S2–S4 unmodified; S5 broadly concave, lateral comb of about 20 long, thick, black setae (Fig. 30d, i); S6–S8 and gonocoxa as illustrated (Fig. 30d–h).

Distribution ( Fig. 31 ). Anthidiellum bipectinatum is wide spread in southern Africa.

Material examined. Type material. Male holotype of Anthidiellum (Pygnanthidium) bipectinatum : ‘SOUTH AFRICA Transvaal Prov. 8 Mi S Gollel xii–6–1966, J.G. Rozen D.J. Brothers Collectors, Anthidiellum (Pygnanthidium) bipectinatum n. sp. J. Pasteels det.. 1968, Type’, AMNH.

Additional material. Tanzania. Dodoma, 70km N, 05.40S 35.48E , 16.xii.2006, J. Halada, M. Kadlecova (2♂ SC). Zambia. 30km W Livingstone , 19–22.xii.2002, J. Halada (1♀ SC). Mozambique . Manje , 15km SSE, 15.29S 33.16E , 2–4.xii.2006, M. Kadlecova (1♂ SC). Namibia. 40km E Rundu , 21.i.1993, M. Schwarz (1♀ SC); 60km SW Otavi , 14.i.1993, M. Schwarz (1♀ SC). South Africa. Mogol Nature Reserve, Ellisras district, 23.58S 27.45E , 25–26.i.1982, C.D. Eardley (1♀ 1♂ SANC); Rustenburg Nature Reserve , 25.40S 27.12E , 8.xii.1983, C.D Eardley (1♂ SANC).

Figures

FIGURE 1. Anthidiellum, FEMALE,FAcE SHOWINg SHAPE OF cLyPEUS.A.DIStINctLy ROUNDED ABOVE.B.SLIgHt ROUNDED ABOVE.

FIGURE 29.Anthidiellum bipectinatum.A–B FEMALE.A.HABItUS.B.FAcE.c–D. MALE.c. HABItUS.

FIGURE 31. KNOWN DIStRIBUtION OF Anthidiellum bipectinatum.