Sphex schoutedeni schoutedeni Kohl, 1913

Dörfel, Thorleif H. & Ohl, Michael, 2022, The wasp genus Sphex in Sub-Saharan Africa (Hymenoptera: Sphecidae), European Journal of Taxonomy 796 (1), pp. 1-170 : 114-115

publication ID

https://doi.org/10.5852/ejt.2022.796.1665

publication LSID

lsid:zoobank.org:pub:76C5C9C4-C6C1-4EDC-8FF8-9828A6EF2040

DOI

https://doi.org/10.5281/zenodo.6535886

persistent identifier

https://treatment.plazi.org/id/03C20928-FFE0-FFD1-4239-12E73D210BBF

treatment provided by

Felipe

scientific name

Sphex schoutedeni schoutedeni Kohl, 1913
status

 

Sphex schoutedeni schoutedeni Kohl, 1913

Figs 94, 99 View Figure 93–99. 93, 96 (red)

Sphex schoutedeni Kohl, 1913: 205 , ♂.

Differential eiagnosis

Males of this species are easiest to recognize based on the structure of their posterior sterna. Lacking an incision on the posterior margin of sternum VII and having sternum VIII semicircular and simple, they resemble S. stadelmanni stadelmanni ( Fig. 95 View Figure 93–99. 93, 96 ). While that species has uniformly black erect setae at least on the propodeal enclosure, these setae are mostly silvery in S. schoutedeni schoutedeni ( Fig. 94 View Figure 93–99. 93, 96 ). Close examination of the valvicepes also reveals notable structural differences between these species ( Figs 21–24 View Figs 19–24. 19–20 ). The subspecies S. schoutedeni malawicus subsp. nov. is very similar to the nominotypical form, but has the erect propodeal setae black, as in S. stadelmanni stadelmanni .

Females are much more difficult to identify. Due to the absence of visible sternal or genitalia characters, the color of their erect and appressed propodeal setae is one of the only useful diagnostics. Sphex abbotti nivarius subsp. nov. ( Fig. 89 View Figs 85–92. 85–86 ) has silvery erect propodeal setae as well, and members of that somewhat variable subspecies which possess black appressed propodeal setae are almost indistinguishable. However, their petiole is around twice as long as it is wide, whereas that of female S. schoutedeni schoutedeni is at most 1.7 × as long as wide.

Material examined

Holotype ZAMBIA – Muchinga Province • ♂; Mpika; Jan. 1908; S.A. Neave leg.; MRAC.

Other material

DEMOCRATIC REPUBLIC OF THE CONGO – Haut-Katanga • 1 ♂; Elisabethville [now Lubumbashi] ; [11°40ʹ S, 27°29ʹ E]; Jun. 1932; de Loose leg.; MRAC GoogleMaps 1 ♂; same collection data as for preceding but 1933; MRAC GoogleMaps 2 ♂♂; same collection data as for preceding but Feb. 1933; MRAC GoogleMaps 1 ♀; same collection data as for preceding but Apr. 1933; MRAC GoogleMaps 1 ♂; same locality as for preceding; 2 Jan. 1937; H.-J. Brédo leg.; IRSN GoogleMaps 1 ♂; Lubumbashi ; 11°45ʹ S, 27°40ʹ E; 12 Mar. 1921; M. Bequaert leg.; MRAC GoogleMaps 1 ♂; Kasepa , river; 1920; M. Bequaert leg.; MRAC .

ZAMBIA – Muchinga Province • 1 ♀; “L. Chambezi V. , Mpika distr. ”; alt. 3900 ft; 19 May 1908; S.A. Neave leg.; OUMNH . – Northern Province • 1 ♀; Abercorn [now Mbala] ; [8°50ʹ S, 31°28ʹ E]; Nov. 1943; IRSN GoogleMaps 1 ♂; same locality as for preceding; 14 Feb. 1951; F.O. Albrecht leg.; BMNH GoogleMaps .

Description

Female

SIZE. 23.4–28.9 mm.

COLOR. Black, except for basal half of mandible and free clypeal margin which are ferruginous. Wings uniformly fuscous, with purple-bluish iridescence.

VESTITURE. Appressed setae on clypeus black, at lateral clypeal margin and on paraocular area brassy. Appressed setae on collar, scutum, propodeal enclosure and posterior propodeal margin black. Erect setae on clypeus, paraocular area, collar and scutum black, on propodeal enclosure and posterior propodeal margin silvery. Erect propodeal setae oriented posteriorly. Lower center of clypeus glabrous. Scutellum densely and coarsely pubescent.

STRUCTURE. Free clypeal margin medially with two broad, indistinct processes, stepped above. Clypeus with slight indentation in lower center, without carina. Scutellum convex. Metanotum not raised, not bituberculate. 2 nd recurrent vein joins markedly proximal from interstitium between submarginal cells II and III. Propodeal enclosure without any notable ridges. Foretarsomere I 2.6–2.9 × length of antepenultimate spine. Petiole length 1.5–1.7× its medial width.

Male

SIZE. 25.4–25.8 mm.

COLOR. Black except for the following, which are ferruginous: basal half of mandible and free clypeal margin partially. Wings slightly infuscate, with violet iridescence.

VESTITURE. Appressed setae on clypeus and paraocular area brassy, on collar, scutum and propodeal enclosure black. Erect setae on clypeus, paraocular area, collar and scutum black, on propodeal enclosure brassy intermixed with black, on posterior margin of propodeum silvery. Erect propodeal setae oriented posteriorly. Clypeus with glabrous spot medially at free margin. Scutellum densely and coarsely pubescent. Metasomal sterna II–VII with increasingly dense fringes of black setae.

STRUCTURE. Free clypeal margin simple. Scutellum convex. Metanotum not raised, not bituberculate. 2 nd recurrent vein joins markedly proximal from interstitium between submarginal cells II and III. Propodeal enclosure without any notable ridges. Posterior margin of metasomal tergum VII convex. Posterior margin of metasomal sternum VII simple, of metasomal sternum VIII semicircular. Fused penis valvae laterally not widened, with notch, valviceps oriented perpendicularly. Petiole length 1.4–1.6× its medial width. Flagellomeres IV–VI with broad placoids covering their entire length.

Variation

In a male specimen from Angola, the appressed propodeal setae are silvery instead of black. Females often have the erect silvery setae on the propodeal enclosure interspersed with some black ones.

Disribution

Central Africa.

MRAC

Belgium, Tervuren, Musee Royal de l'Afrique Centrale

IRSN

Belgium, Brussels, Institut Royal des Sciences Naturelles de Belgique

OUMNH

United Kingdom, Oxford, University Museum of Natural History

BMNH

United Kingdom, London, The Natural History Museum [formerly British Museum (Natural History)]

MRAC

Musée Royal de l’Afrique Centrale

IRSN

Institut Royal des Sciences Naturelles de Belgique

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Vespidae

Genus

Sphex

Loc

Sphex schoutedeni schoutedeni Kohl, 1913

Dörfel, Thorleif H. & Ohl, Michael 2022
2022
Loc

Sphex schoutedeni

Kohl F. F. 1913: 205
1913