Hylaeus (Deranchylaeus) camerunensis, Dathe, 2014

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), Zootaxa 3874 (1), pp. 1-84 : 27-29

Hylaeus (Deranchylaeus) camerunensis sp. n.

Figures 17 , 38 , 54–57

Diagnosis

This is a species in the tinctulus-group. Its distinctive features are in the male terminalia ( Fig. 17 ). The female association with the male is uncertain.

Description

Male. TL 4.3–5.4 (4.94) mm, WL 3.3–3.9 (3.63) mm.

Head. Proportions HL:HW 0.95, UFW:LFW 2.42, outline transversely elliptical. Face strongly converging downward, bulging medially, frons sloping backwards. Scapi black, conical, apically expanded, wider than flagella, SL:SW 1.32; flagella long, black, yellow below. Mask white, supraclypeal area black, reduced white patches on face sides and clypeus. Foveae faciales long. Clypeus CL:CW 1.74, shagreen, matt, scattered fine punctate. Supraclypeal area long narrow, partially channel-like. Frons shagreen, matt below, with moderate sparse punctation above, vertex with strong subcontiguous punctation, area near antennae bases somewhat shiny. Genae, occiput and malae normal. Labrum and mandibles black.

Mesosoma dorsoventrally weakly depressed. Pilosity sparse, white, more clear on posterior margin of pronotum, metanotum and terminal area of propodeum. Pronotum, calli and tegulae entirely black. Pronotum narrow medially, sides clearly expanded forward; with sharp leading edge medially, side and posterolateral angles rounded. Mesonotum, scutellum and mesopleurae shagreen, matt, punctation moderate, close. Legs black, bright spots only on foretibiae in front; wings hyaline, venation black. Propodeum edged, matt; medial area transversely depressed, basally with longitudinal ridges, distally delimited by a carina; terminal area only with lateral margins sharp, continuing to lower edges of lateral areas.

Metasoma slender spindle-shaped; black. T1 finely shagreen, very fine, shallow stippling very indistinct or absent (less than minute and scattered punctate). T1 without lateral fringes and marginal bands. Terminalia ( Fig. 17 ): genital capsule with gonoforcipes expanded apically and strongly narrowed; S8 anterior margin deeply emarginate; S7 proximal lobi with 3–4 strong teeth.

Female. TL 5.92 mm, WL 4.28 mm.

Head. Proportions HL:HW 0.94, UFW:LFW 1.46, outline nearly circular, vertex raised. Scapi black; flagella short, yellow, black above. Face entirely black. Foveae faciales long. Clypeus CL:CW 1.11, matt, punctation shallow, increasingly disappearing in shagreen ( Fig. 38 ). Supraclypeal area above and frons next to frontline longitudinally striated. Frons shagreen, matt, punctation shallow, strong and dense, on vertex above subcontiguous. Genae and occiput normal, malae narrow. Labrum and mandibles black.

Mesosoma long, dorsoventrally depressed. Pilosity sparse, indistinct. Tegulae each with a tiny pale spot. Pronotum black, expanded forward, anterior margin and dorsolateral angles edged. Mesonotum, scutellum and metanotum shagreen, matt, punctation fine to moderate, close. Mesopleurae shallower punctate than mesonotum, mesepisternum in front slightly bent up. Legs entirely black; wings darkened, venation black. Propodeum egded, matt; medial area short, transversely depressed, basally with a shiny row of meshes, apically delimited by a carina; terminal area matt, with sharp lateral margins continuing to lower edges of lateral areas.

Metasoma compact, narrow, slender spindle-shaped; black. T1 shagreen, silky shining, not punctate. T1 with narrow white lateral fringes. Fringe of last sternum yellowish.

Distribution

Cameroon, Gabon.

Type material: 9 ♂, 1 ♀

Holotypus: ♂ GABON. Dienga, savane 35 km E, 30.01.1986, Pauly lg.—In coll. RBINS Brussels.

Paratypes: CAMEROON. West, Wum, 06.24N 10.03E, 20.07.1987, 1 ♂, Pauly lg.

GABON. Dienga, savane 35 km E, 30.01.1986, 6 ♂; Nzéla, 29.01.1986, 1 ♂; Estu., Tchimbéla, 07.02.1987, 1 ♀, all Pauly lg.—In coll. RBINS Brussels, SANC Pretoria, SDEI Müncheberg.

Derivatio nominis

The new species was first found in Cameroon and Gabon. The name is used as an adjective.

Flower visit

On flowers of Harungana madagascariensis (Pauly, label record).

Remarks

There is only one female available with a different collecting locality and date, whose features correspond with the males described here.

Figures

FIGURES 16–19. Male terminalia in species of tinctulus-group.—16 H. tinctulus Cockerell (typus).—17 H. camerunensis sp. n. (typus).—18 H. chimani sp. n. (typus).—19 H. oromialis sp. n. (typus). Scale 0.5 mm.

FIGURES 38–39. Surface structure of female clypeus.—38 H. camerunensis sp. n. (paratypus).—39 H. paulyi sp. n. (paratypus). Scale 0.2 mm.

FIGURES 54–57. H. (Deranchylaeus) camerunensis sp. n.: head in frontal view and surface structure of basal terga.—54, 55 Typus male.—56, 57 Paratypus female. Scale 0.5 mm.