Pachyanthidium (Pachyanthidium) katangense Cockerell

Eardley, Connal & Griswold, Terry, 2017, Taxonomic revision of the Afrotropical species of Pachyanthidium Friese (Hymenoptera: Megachilidae: Anthidiini), Zootaxa 4237 (3), pp. 401-453 : 437-440

Pachyanthidium (Pachyanthidium) katangense Cockerell

( Figs 24–25 )

Pachyanthidium cordatum katangense Cockerell, 1930: 47 , male holotype (RMCA) Democratic Republic of the Congo. Pachyanthidium katangense Cockerell : Pasteels 1968: 483.

Pachyanthidium (Pachyanthidium) katangense Cockerell : Pasteels 1984: 148.

Diagnosis. The naked eye, no arolia and extensive black on the metasomal dorsum ( Fig. 24 ) excludes all other Pachyanthidium except other members of the cordatum species-group. From these, females can be distinguished by yellow tergal maculations, mesepisternal maculation, posterolateral angle of scutum thickened forming triangle in lateral view, terga densely punctate laterally and mandible spatulate, with one outer tooth, the second tooth part of the straight spatulate area. Males can be distinguished by the combination of yellow tergal maculations, posterolateral angle of scutum thickened appearing triangular in lateral view, median spine of T7 slender and midventral depression of mesepisternum shallow.

Description. FEMALE. Lengths: head 3.0– 3.3 mm; scutum 1.8–2.4 mm; forewing 6.5–7.5 mm; body 6.8–8.0 mm. Head and mesosoma black with yellow maculations on clypeus, lower paraocular area, narrow outer margin of upper paraocular area, spot on medioventral supraclypeus, usually with medial spot on frons, posterior margin of vertex, anterior margin of gena, basal half of mandible, lateral margins of scutum and axilla, medially interrupted subapical cross-band on scutellum (distal lamella translucent yellowish), tegular spot, mesepisternum posterior to omaulus, posterior femora and dorsal tibiae and tarsi (remainder of legs orangish-yellow); metasoma with T1–T5 yellow laterally, black medially and distal margins translucent orange, T6 and S1–S6 mostly yellow. Structure ( Fig. 24 ). Preoccipital ridge weakly lamellate; eye naked; clypeus ventral edge about straight, 2 mediolateral tubercles; mandible distinctly spatulate, 1 distinct tooth, spatulate area straight; pronotal lobe strongly lamellate; omaulus lamellate; forebasitarsus short and broad, length 0.6x foretibia length, 3.3x its width; arolia absent; T1–T5 without lateral spines; T6 rounded laterally, slightly lobate, without spine, extended posteriorly, distinctly cleft posteromedially.

MALE. Lengths: head 2.8–3.2 mm; scutum 1.8–2.0 mm; forewing 6.3–6.8 mm; body 6.8–7.7 mm. Integument colouration as in female except mandible, T7 and S1–S6 entirely yellow. Structure ( Fig. 24 ). Preoccipital ridge weakly lamellate; eye naked; clypeus ventral edge about straight, mediolateral tubercle; antennal flagellum 0.85x eye length; 3.1x scape length; mandible 6 dissimilar, pointed teeth; omaulus lamellate; forebasitarsus sparely pubescent, moderately long posterior fringe; forebasitarsus length 0.6x foretibia length, 0.3x its width, not distinctly extended anterodistally; hind basitarsus wide, length 2.5x width; arolia absent; T1–T4 without lateral spines or swelling; T5 slight posterolateral swelling; T 6 in one plane, extended posteromedially, ventrolateral spine, posterolateral and posteromedian tubercles, latter emarginated posteromedially; T7 narrow posterolateral spine (narrower than length), obtusely pointed posterior median spine, concavity between median and lateral spines 1.7x width of median spine; terminalia as in P. cordatum (cf. Fig. 16 ).

Distribution. This species occurs in southeastern Democratic Republic of the Congo, Zambia, Zimbabwe and eastern South Africa ( Fig. 25 ).

Material examined. Type material. Female holotype of Pachyanthidium cordatum katangense : ‘Lubumbashi Katanga BCgo 11.45S 27.40E 23.v.1920, Mich. Bequaert Coll., R. DET. 0 1895, Pachyanthidium cordatum katangense Ckll TYPE . , MUSÉE DU CONGO Lubumbashi 23.v.1920, (Dr M. Bequaert) (Don Dr J. Bequaert), HOLOTYPUS’, in RMCA .

Additional material. Ethiopia. Arba– Minch, Lake Chamo , 2012. ix.21, J– L. Boeve (1♂ RBINS) . Congo D.R. Park Upemba, 24 mi W Lusinga , 1958 . i.20 (1♀ CAS). Zambia. Chipata, 20km SE, 1982 . xi.10, T.L. & R.T. Griswold (1♂ BBSL). Zimbabwe. Harare, A. Watsham (1♀ SANC); Chimanimani, 1050m, Melsetter, 1985 . iv.25, J. Gusenleitner (1♀ MSAA). South Africa. Strijdom Tunnel, 1969. ii.19, L. C. Starke (1♂ SANC) ; Assegaaihoutkloof, near Groblersdal , 1979. xi.4, R. H. Watmough (1♀ SANC) ; Pretoria Kop , 1950. x.27, H. K. Munro (1♂ SANC) ; Hluhluwe Game Reserve , 1974. ii.8, R. H. Watmough (1♂ SANC) ; Tugela Ferry , 1971. xi.13, H. Empey (1♂ SANC) ; Scottburgh , 1963. iii.15, H. Empey (1♂ SANC) ; Port St. John , 1916.ix, H. H. Swinny (1♂ SANC) ; Algoa Bay, 1892.x, H. Brauns (1♂ TMSA) .

Discussion. The male from Ethiopia may be incorrectly assigned; while it agrees in morphology it differs markedly in the metasoma is yellow and orange rather than black and yellow.

Figures

FIGURE 16. Pachyanthidium cordatum (Smith). a. Female T 6. b – g. Male. b – c. T 6. d – f. S 6 – 8. g. Genitalia, dorsal view.

FIGURE 24. Pachyanthidium katangense Cockerell. a – c. Female. a. Face. b. Habitus. c. T 6. d – f. Male. d. Face. e. Habitus. f. T 6 – T 7.

FIGURE 25. Pachyanthidium katangense Cockerell (●) and Pachyanthidium arnoldi Mavromoustakis (*), known distribution.