Hylaeus (Deranchylaeus) robertianus
Creators: name: Dathe, Holger H.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Colletidae
Hylaeus
Hylaeus robertianus

description: Hylaeus (Deranchylaeus) robertianus (Cameron, 1906)
Figures 28, 43, 128–131
Prosopis robertiana Cameron, 1906: 324–325. ♂, South Africa: Cape Colony, Pearston. Typus ♂ NHM London, no. 17.a.17.— Friese 1909: 110, 114–115, 128, 134; Strand 1912: 27, 30.
Hylaeus robertianus (Cameron): Cockerell 1936e: 9; Eardley & Urban 2010: 34–35.
Hylaeus (Deranchylaeus) robertiana (Cameron): Snelling 1985: 8.
Prosopis atriceps Friese, 1911: 127–130. 3 ♀ 1 ♂, South Africa: N. Transvaal, Shilouvane. Syntypes MNHU Berlin, ♂ labeled "Shilouvane N. Transvaal 10. (Junod)" designated as lectotypus here; ♀ with same data designated as paralectotypus.— Syn. n.— Strand 1912: 27; Friese 1913a: 583; Friese 1913b: 574; Alfken 1914: 187–188; Friese 1916: 422; Friese 1941: 98.
Hylaeus atriceps (Friese): Cockerell 1936e: 1, 5–6, 9–10; Cockerell 1942: 2. Eardley & Urban 2010: 27.
Hylaeus (Deranchylaeus) atriceps (Friese): Bridwell 1919: 140; Snelling 1985: 8; Rasmussen & Ascher 2008: 27.
Hylaeus cf. atriceps (Friese): Struck 1994: 13.
Prosopis atriceps var. major Strand 1912: 27, 33. 1 ♀, Tanzania: Nyassa-See, Langenburg. Typus ♀ MNHU Berlin.— Syn. n.
Hylaeus atriceps major (Strand): Cockerell 1942: 2.
Hylaeus (Deranchylaeus) major (Strand): Snelling 1985: 8.
Hylaeus major (Strand): Eardley & Urban 2010: 32.
Hylaeus tenuis var. dominae Cockerell 1936e: 2, 6, 8–9. 3 ♂, South Africa: Cape Province, Lady Grey. Typus ♂ NHM London, no. 17.a.34.— Syn. n.
Hylaeus tenuis dominae Cockerell: Cockerell 1942: 3.
Hylaeus (Deranchylaeus) dominae Cockerell: Snelling 1985: 8.
Hylaeus dominae Cockerell: Eardley & Urban 2010: 29.
Hylaeus punctiferus Cockerell, 1936e: 5–6. ♀, South Africa: Natal, Durban. Typus ♀ AMNH New York, ac. 34187.— Syn. n.— Cockerell 1942: 2; Eardley & Urban 2010: 34.
Hylaeus punctifrons Cockerell, 1936 in Snelling 1985: 8; obviously H. punctiferus is incorrectly spelled as "punctfrons" with no nomenclatural relevance, defined as nomen nudum by Eardley & Urban (2910: 34).
Hylaeus (Deranchylaeus) punctiferus Cockerell: Snelling 1985: 8.
Hylaeus sanctus Cockerell, 1936e: 2, 7–8. ♂, S. Rhodesia [Zimbabwe]: Christmas Pass, Umtali. Typus ♂ AMNH New York, ac. 34187.— Syn. n.— Cockerell 1942: 2; Eardley & Urban 2010: 35.
Hylaeus (Deranchylaeus) sanctus Cockerell: Snelling 1985: 8.
Hylaeus sublucens Cockerell, 1936e: 5, 8. ♀, South Africa: Transvaal, Louis Trichardt. Typus ♀ AMNH New York, ac. 34187.— Syn. n.— Cockerell 1942: 3; Eardley & Urban 2010: 36.
Hylaeus (Deranchylaeus) sublucens Cockerell: Snelling 1985: 8.
Hylaeus varians Cockerell, 1936e: 8, 10–11. 4♂, S-Rhodesia [Zimbabwe]: Christmas Pass, Umtali. Typus ♂ AMNH New York, ac. 34242.— Syn. n.— Cockerell 1942: 3–4.
Prosopis totana Warncke, 1972: 748, nomen novum for Hylaeus varians Cockerell, 1936 not Prosopis varians Spinola, 1806.— Syn. n.
Hylaeus multifarius Eardley & Urban, 2010: 33, nomen novum for Hylaeus varians Cockerell, 1936 not Prosopis varians Spinola, 1806.— Syn. n.
Hylaeus (Deranchylaeus) varians Cockerell: Snelling 1985: 8.
Diagnosis
This is a dainty species with fine sculpture. The male mask is transversely truncate above forming a shallow bow at the level of the scapi bases. The clypeus is remarkably long and the supraclypeal area is narrow. The scapi are expanded, apically they are wider than the flagella. The female has small comma-shaped spots adjacent to the orbits.
Characteristic features
Male. TL 4.0–5.1 (4.50) mm, WL 3.2–3.5 (3.34) mm.
Head. Proportions HL:HW 0.95, UFW:LFW 1.96, outline trapezoid. Scapi black, basally conical, apically bulbous this wider than flagella, vault shiny, SL:SW 1.8; flagella long, segments 2–11 yellow below, brown above; mask complete, pale yellow, upper edge a single arch, side patches tapering to orbits; foveae faciales short. Clypeus long, CL:CW 1.72, surface matt. Supraclypeal area narrow, below half as wide as distance to adjacent orbits; frons and vertex with strong punctation in rugose stripes. Labrum and mandibles black.
Mesosoma depressed, pilosity white, erect, conspicuous on under side of head, mesosoma and femora I; tegulae with white spot. Pronotum black, edged, expanded forward; anterior margin angular, dorsolateral angles obtuse. Mesonotum and scutellum with moderately close punctation. Legs black, bright patches on tibia bases, on foretibiae in front, and on basitarsi. Propodeum moderately sculptured, only medial area with longitudinal ridges, medial area circumscribed by sharp carina, terminal area with sharp lateral edges, without carinae on lateral areas.
Metasoma long, slender spindle-shaped, black. Terga finely shagreen, silky shining, punctation minute, sparse. T1 with narrow white lateral fringes, following terga with fine cilia stocking. Terminalia (Fig. 28): genital capsule with oval outline, gonoforcipes short, rounded, S8 expanded, with front edge emarginate, S7 apical lobi short, compact, basal lobi with 4 fine comb bristles, close to H. gabonicus.
Female. TL 5.0–5.9 (5.51) mm, WL 3.5–4.3 (3.72) mm.
Head. Proportions HL:HW 0.98, UFW:LFW 1.46, outline trapezoid rounded. Face with yellowish white comma patches near orbits at level of antennal sockets. Clypeus CL:CW 1.15, with fine, sparse punctation, punctures clearly delimited.
Mesosoma prolonged, depressed. Pilosity as in male, white tomentum also around antennal bases. Tegulae with bright spots. Pronotum black, expanded forward, front edge margin raised, their dorsolateral angles blunt (Fig. 43). Mesonotum and scutellum with moderate, dense punctation; mesopleurae with somewhat scattered punctation. Legs black, only foretibiae in front with pale stripes. Propodeum edged, sculpted moderately; medial area with longitudinal ridges, apically delimited by transverse carina; terminal area laterally sharp, towards lateral areas only with blunt edges, medial furrow deep.
Metasoma narrow spindle-shaped, black. Sculpture fine, as in male, silky shining. T1 with white lateral fringes, T2 to T5 with narrow white terminal bands.
Distribution
South Africa (Eardley & Urban 2010); Burundi, Kenya, Malawi, Tanzania, Zimbabwe.
Specimens examined: 45 ♂, 84 ♀ coll. AMNH, MNHU, NHML, OLBL, RBINS, TMSA.
BURUNDI. Ruvubu National Park, Ruvubu River, 02.59.20S 30.28.12E, 1401 m.
KENYA. Taita Hills, Wundanyi; Voi env., Tsavo.
MALAWI. Liongwe 80 km E; Liongwe 85 km SE, Dedza.
MOZAMBIQUE. Guro 15 km S, 17.33S 33.16E, 800 m; Inhambane pr., Massinga 25 km N.
SOUTH AFRICA: Eastern Cape: Grahamstown; Grahamstown, Belmont Valley; Grahamstown, Hilton; Groendal Uitenhage; Howlson’s Poort, 33.22S 26.29E; Lady Grey; Nature Reserve 10 km SE Alexandria; Pearston; Pine Tree Lodge; Willowmore.— Free State: Amattam Farm nr. Clarens., 28.32S 28.28E.— Gauteng: Mondeor Hills; Pretoria City; Pretoria, Faerie Glen Koppies, 25.46S 28.17E; Roodeplaat, 25.36S 28.21E.— KwaZulu-Natal: Eshowe env.; Greytown 20 km N, 28.58S 30.34E, 1140 m; Pongola 25 km S, 27.34S 31.35E, 510 m; Weenen, 2840 ft. — Limpopo: Altona Farm Tzaneen, 23.45S 30.04E; Louis Trichardt; O.T.K. Reserve nr Loskopdam, 25.27S 29.24E; Ryfontein Farm 15 km SE Tzaneen, 23.54S 29.45E; Shilouvane.— Mpumalanga: Lydenbrug 20 km SW.— Western Cape: Klein Karoo, Ladismith; Oudtshoorn; Touws River.
TANZANIA. Nyassa-See, Langenburg.
ZIMBABWE. Chimanimani National Park; Christmas Pass, Umtali; Mavhuradonha 15 km SE; Muzarabani; Plumtree; Samva 25 km NE, Nyagui r. (Bindura); Springquelle.
Flower visit
On flowers of Foeniculum vulgare (FW Gess, label record); Allophylus africanus, Vernonia sp. (Pauly, label record).
description: Published as part of Dathe, Holger H., 2014, Studies on the systematics and taxonomy of the genus Hylaeus F. (8) Revision of the Afrotropic subgenus Hylaeus (Deranchylaeus) Bridwell (Hymenoptera: Anthophila, Colletidae), pp. 1-84 in Zootaxa 3874 (1) on pages 64-67, DOI: 10.11646/zootaxa.3874.1.1, http://zenodo.org/record/4948240