Frankenbergerius opacus, Frolov & Scholtz, 2005

Frolov, A. V. & Scholtz, C. H., 2005, Revision of the southern African genus Frankenbergerius Balthasar with description of new taxa (Coleoptera: Scarabaeidae: Scarabaeinae), Journal of Natural History 39 (25), pp. 2355-2377 : 2373-2374

Frankenbergerius opacus sp. n.

(Figures 4, 7, 10, 12, 43)

Diagnosis

This species is similar to F. nanus and F. nitidus sp. n. but can be separated from them by the concave base of the pronotum, small longitudinal keel on the pygidium, and the shape of the parameres.

Description

Holotype: „ (Figure 7). Body black, shiny, length 7.0 mm, width 4.1 mm. Dorsal surface with minute setae.

Head. Clypeus with anterior angles dentiform, separated by deep sinuation. Genae rounded, finely bordered. Genal sutures almost indistinct. Lateral margins of clypeus not sinuate near genal suture. Frontal suture indistinct on disc. Genae and anterior part of clypeus densely punctate, almost rugose; disc more sparsely punctate, margins of punctures indistinct.

Pronotum. Anterior and hind angles rounded. Lateral and anterior margins bordered, base not bordered. Border of anterior margin widened at middle, without sinuation. Dorsal surface densely and coarsely punctate; punctures almost adjacent. Base of pronotum concave (Figure 4).

Elytra. Striae distinct, punctate (punctures as wide as striae, separated by four to five puncture diameters on disc); striae 9 and 10 widely separated, with deeper and larger punctures medially. Intervals matt, impunctate, with rounded to elongated shiny tubercles.

Underside. Pygidium with strong border and small longitudinal keel, its disc deeply depressed and densely punctate (Figure 10). Mesosternum coarsely punctate; metasternum smooth on disc, otherwise punctate as mesosternum.

Legs. Anterior legs with three outer teeth with indistinct teeth between. Anterior tibial spur bifurcated.

Aedeagus. Parameres with widely rounded apices (Figure 12).

Paratypes: body length varies in males from 5.8 mm to 7.1 mm, width from 4.0 mm to 3.6 mm, in females 7.5– 6.1 mm and 4.6– 3.9 mm, otherwise variation among specimens is very weak.

Distribution

The only recorded locality for this species is Stellenbosch (Western Cape Province) ( Figure 43 ).

Type material

Holotype: „ with labels ‘‘ Stellenbosch [33 ° 56 9 S, 18 ° 51 9 E] 24.5.22 Ch. K. Brain’ ’, ‘‘ Coptorhina sp. Not in B.M. Det. G.E. Bryant’ ’, and ‘‘ Pres. by Com. Inst. Ent. ( BMNH) 1949–114’’ ( BMNH) . Paratypes: 2 „ and 3♀ with the same data but without identification label by Bryant ( BMNH). One „ paratype lacks right elytron .

Additional material examined

One „ from unknown locality with handwritten label ‘‘33’’ (SANC).

Figures

Figures 39–43. Frankenbergerius spp. (39–42) F. gomesi. (39) Habitus of „. (40) Aedeagus in dorsal and lateral view. (41, 42) Head of „ and ♀, respectively. (43) Distribution map of Frankenbergerius.