Oedanomerus lupanus Sehnal, 2018

Sehnal, Richard, 2018, Two new Oedanomerus species from Zimbabwe (Coleoptera: Scarabaeidae: Melolonthinae: Tanyproctini), Zootaxa 4377 (4), pp. 593-600 : 598

Oedanomerus lupanus Sehnal , new species ( Figs. 1B , 2B , 3B , 4B, 4F , 5K )

Type locality. Zimbabwe, [Matabeleland North Province], Hwange , Lupane.

Type material. Holotype and two paratypes (all males): “ ZIMBABWE W | SE Hwange | 40 km NW of Lupane | 15. 11. 2014 Snížek [white label, printed]”.

Type depository. Holotype in Národní muzeum Praha, Czech Republic , paratypes in Richard Sehnal collection, Velenice, Czech Republic .

Description of holotype (male). Body length 7.1 mm. Body elongate. Head, pronotum and scutellum black ( Fig. 1B ); antennae bicolorous, antennal club pale brown, antennal shaft black ( Fig. 2B ); elytra chesnut brown with black suture and humeral umbones ( Fig. 1B ). Pro-, meso- and metatibiae brown, protarsi testaceous, meso- and metatarsi dark brown. Abdomen brownish black.

Head. Clypeus pointed; clypeal carina broad, prominent; clypeal plate vertical; shallowly punctate; each puncture bearing a long, erect, posteriorly inclined, yellow macrosetae ( Fig. 2B ). Labrum reduced, triangular; lobes rounded. Frons deeply rugose; edge of clypeus strongly punctate; each puncture bearing a long, semierect, posteriorly inclined, yellow macroseta.

Eyes large, exceeding genae externally in dorsal view. Genae rugopunctate, with group of long macrosetae. Antennae ( Fig. 2B ) with eight antennomeres; antennomeres 6–8 forming long, straight club at least 1.7x times longer than antennal shaft; antennomeres 1–5 with sparse, long macrosetae; antennal club completely densely punctate, without smooth areas. Pedicel bulbous and as long as antennomere 3. Terminal maxillary palpomere elongate, longer than palpomeres 2 and 3 combined; sub-basally with apically pointed, flat, oval alutaceous area tapering toward apex.

Pronotum ( Fig. 2B ) weakly convex, approximately tetragonal, 1.28x times wider than long, widest approximately at middle; margin nearly completely bordered, anterior border broadly interrupted medially. Anterior and posterior angles broadly rounded, poorly defined. Surface with very long, yellow macrosetae, basal border with white macrosetae; disc shallowly punctate and wrinkled, posterior angles without punctures.

Scutellum slightly longer than wide, matte, completly shallowly punctate, with long, fine macorseta, margins broadly arcuate.

Elytra moderately convex, narrow. Disc wrinkled and punctate; punctures evenly distributed, separated by more than 2x the puncture diameter; macrosetae short and denser than on pronotum, inclined posteriorly, absent from distinct humeri. Sides punctate, with lateral margins and apices diffusely lighter-colored than disc.

Macropterous. Legs. All femora shiny and irregularly, coarsely punctate; yellow macrosetae short and white macrosetae long. Protibia tridentate ( Fig. 4F ). Claws simple. Metafemora chesnut brown with intermixed long macrosetae and long macrosetae. Mesotibiae moderately expanded apically. Metatibiae black, strongly expanded apically, with one oblique carina externally; carina and apical edge with row of stout, yellow macrosetae; terminal calcars stout, long, lower calcar longer than upper calcar ( Fig. 4B ). Pro- and mesotarsomeres without patches of short, dense macrosetae; metatarsomeres ventrally covered with long, sparse macrosetae.

Abdominal sternites brownish black, with yellowish-white, recumbent macrosetae. Pygidium chesnut brown, flat, finely punctate, with very long, white macrosetae.

Male genitalia ( Fig. 3B ). Aedeagus symmetrical, parameres slender, long.

Variability in males. Paratypes somewhat variable in body length (7.3–7.4 mm), slightly variable in dorsal punctation density and length and distribution of macrosetae. Color as in holotype.

Female. Unknown.

Diagnosis. Based on characters stated in Evans (1987), the new species differs from its congeners by the following combination of characters: smaller and narrow species; antennae with eight antennomeres; tridentate protibia; clypeus pointed apically; clypeal carina broad, prominent; posterior pronotal angles without punctures, basal border with very long, white macrosetae; head and pronotum black, elytra chestnut brown with black suture and humeral umbones; metafemur brown. Generally, the new species is similar to O. pilosus and O. bidentatus new species. Oedanomerus pilosus has head and pronotum piceous; anterior clypeal margin broadly rounded, clypeal subapical carina long; smaller body; and different shape of aedeagus ( Evans 1987). Oedanomerus bidentatus new species has elytra black with brownish-black margins; narrower clypeus; bidentate protibia; smaller body; and differently shaped aedeagus and antennal club ( Figs. 1A , 2A , 3A , 4A, 4E ).

Figures

FIGURES 1A–D. Habitus, dorsal and lateral views. A, Oedanomerus bidentatus Sehnal, new species, holotype male; B, Oedanomerus lupanus Sehnal, new species, holotype male; C, Oedanomerus squamosus Lacroix, 2005, holotype male; D, Oedanomerus uhligi Lacroix,2005,holotype male.Scalebar = 1 mm.

FIGURES 2A–L. Antenna (A–D), clypeus (E–H) and pronotal disc (I–L). A, E, I, Oedanomerus bidentatus Sehnal, new species, holotype male; B, F, J, Oedanomerus lupanus Sehnal, new species, holotype male; C, G, K, Oedanomerus squamosus Lacroix, 2005, holotype male; D, H,L, Oedanomerusuhligi Lacroix,2005, holotype male.Scale bar = 1 mm.

FIGURES 3A–D. Aedeagus, dorsal (left) and lateral (right) views. A, Oedanomerus bidentatus Sehnal, new species, holotype male; B, Oedanomerus lupanus Sehnal, new species, holotype male; C, Oedanomerus squamosus Lacroix, 2005, holotype male; D, Oedanomerus uhligi Lacroix,2005,holotype male.Scalebar = 1 mm.

FIGURE 5. Map with currently known geographic distribution in southern Africa: A—Oedanomerus bicolor Evans, 1987; B— Oedanomerus capriviensis Evans, 1987; C—Oedanomerus hirsutus Waterhouse, 1875; D—Oedanomerus longicornis Arrow, 1987; E—Oedanomerus pilosus Frey, 1960; F—Oedanomerus snizeki Lacroix, 2005; G—Oedanomerus squamosus Lacroix, 2005; H— Oedanomerus uhligi Lacroix, 2005; J—Oedanomerus bidentatus Sehnal, new species; K—Oedanomerus lupanus Sehnal, new species.Reddots indicatenew species or new locality.

FIGURES4A–H. Metafemur withmetatibia (A–D)and protibia(E–F).A, E, Oedanomerus bidentatusSehnal,new species, holotype male; B, F, Oedanomerus lupanus Sehnal, new species,holotype male; C, G, Oedanomerus squamosus Lacroix,2005,holotype male; D, H,Oedanomerus uhligi Lacroix,2005,holotype male.Scale bar = 1 mm.