Ebenacobius tsonga Haran, 2022

Haran, Julien, Benoit, Laure, Procheş, Şerban & Kergoat, Gael J., 2022, Ebenacobius Haran, a new southern African genus of flower weevils (Coleoptera: Curculioninae: Derelomini) associated with dicotyledonous plants, European Journal of Taxonomy 818 (1), pp. 1-54 : 40-41

publication ID

https://doi.org/10.5852/ejt.2022.818.1771

publication LSID

lsid:zoobank.org:pub:17950060-6B62-4479-BAF0-473767DC6ADB

DOI

https://doi.org/10.5281/zenodo.6533008

persistent identifier

https://treatment.plazi.org/id/828D39B0-FDC2-4558-84AD-54A406B54E7B

taxon LSID

lsid:zoobank.org:act:828D39B0-FDC2-4558-84AD-54A406B54E7B

treatment provided by

Felipe

scientific name

Ebenacobius tsonga Haran
status

gen. et sp. nov.

Ebenacobius tsonga Haran gen. et sp. nov.

urn:lsid:zoobank.org:act:828D39B0-FDC2-4558-84AD-54A406B54E7B

Figs 3D View Fig , 5E View Fig , 6M View Fig

Differential diagnosis

Ebenacobius tsonga gen. et sp. nov. can be distinguished by the following combination of features: simple claws, prothorax and elytra similarly pale brown, with two longitudinal dark bands on prothorax not reaching apical margin and elytra with a row of recumbent and subcontiguous setae on interstriae 5–10 of elytra. This species is closely related to E. pedi gen. et sp. nov. and E. hippopotamorum gen. et sp. nov. but in both species setae on elytra are minute, not forming a row of subcontiguous setae laterally. The body of penis in Ebenacobius tsonga is also much shorter (W:L ratio: 0.5; Fig. 6M View Fig ) than in E. pedi and E. hippopotamorum (W:L ratio at least 0.40; Fig. 6L, N View Fig ).

Etymology

This species name is dedicated to the Tsonga people, inhabitants of the north-eastern provinces of the Republic of South Africa (Limpopo and Mpumalalnga). These peoples share this land with the Pedi peoples, as do E. tsonga gen. et sp. nov. and E. pedi gen. et sp. nov., apparently on the same host plant.

Type material

Holotype REPUBLIC OF SOUTH AFRICA • ♂; “S. Afr [REPUBLIC OF SOUTH AFRICA]; Limpopo Prov; Meletse NatRes ; 1003m; 24.36S – 27.39E ” “ 13.ii.2016; E-Y: 3986; Sifting forest litter; Leg. Ruth Müller ” “Holotype; Ebenacobius tsonga ; Haran 2022”; TMSA. GoogleMaps

Paratype REPUBLIC OF SOUTH AFRICA – Mpumalanga Province • 1 ♂; Mbombela [formerly Nelspruit]; 25°30′02.7″ S, 30°57′16.5″ E; 4 Apr. 2018; J. Haran leg.; on flowers of Acokanthera oblongifolia (Hochst.) Codd ( Apocynaceae ); JHAR00838_0101 ; CBGP. GoogleMaps

Description

Male

BODY LENGTH. 3.0 mm.

COLOUR. Body integument pale brown, head reddish; prothorax with 2 longitudinal dark bands on each side of the median line, not reaching apical margin of prothorax, bands sometimes interrupted in middle of length; dark pattern on elytra generally forming elongated dots on interstriae 3 and 5, one before and one beyond middle of length on interstriae 3 and one near basal ¼ and one near middle of length on interstriae 5, dark dots sometimes contiguous on interstriae 5 or almost absent on elytra; dorsum (prothorax + elytra) with recumbent setae, subcontiguous and forming rows on interstriae, more distinct on interstriae 5–10.

HEAD. Rostrum as long as prothorax in lateral view, more downcurved in basal ⅓ than in apical ⅔; underside with a row of setae, as long as 2 nd segment of funicle, integument forming a small tubercle before apex; in dorsal view covered with short recumbent and non-contiguous setae; antennae inserted near apical 1/4 of length; head capsule coarsely punctate in dorsal view, with recumbent whitish setae, as long as diameter of punctures; eyes convex, exceeding the lateral curve of head capsule in dorsal view; antennal funicle with first segment 1.5 × longer than wide, as long as 2–4, 3–7 wider than long.

PROTHORAX. Wider than long (W:L ratio: 1.27), widest near base, slightly narrower there than elytra at humeral angles; sides straight or slightly convex, moderately converging apicad, abruptly converging in apical 1/5, apical constriction as long as width of funicle at apex; integument densely punctate, space between punctures smooth, shiny, at most 2 × wider than diameter of punctures; setae of larger punctures shorter than diameter of punctures in the central area; prosternal process short, not exceeding the level of procoxae.

ELYTRA. Sides slightly convex, widest near middle of length (W:L ratio: 0.75); humeri raised; apex jointly rounded; striae with punctures well aligned, 1.5–2 × narrower than interstriae; interstriae slightly convex, 1, 3 and 5 slightly more convex apically, 9 entirely convex; scutellar shield rounded, glabrous.

ABDOMEN. Underside covered with recumbent whitish setae, not contiguous.

LEGS. Profemora strongly thickened near middle of length, smooth internally; protibiae with external margin straight, meso- and metatibiae slightly curved outward in apical half; tibiae armed with a small apical mucro; claws simple.

TERMINALIA. Body of penis short (W:L ratio: 0.50), 0.7 × as long as apodemes; sides slightly convex in dorsal view, widest near middle of length, apex acute; in lateral view curvature stronger near middle of length, width narrowing apicad in apical ⅓ ( Fig. 6M View Fig ).

Sexual dimorphism

Female specimens were not available in this species.

Remarks

Ebenacobius tsonga gen. et sp. nov. is very close to E. pedi gen. et sp. nov. and was found in sympatry with it, see remarks section under that species for details. Only two males were available for this description, more variability in pattern on dorsum can be expected with the examination of longer series.

Life history

Ebenacobius tsonga gen. et sp. nov. was collected on flowers of Acokanthera oblongifolia ( Apocynaceae ) together with E. pedi gen. et sp. nov. See life history section under than species for details. Adults were collected in February and April.

Distribution

Republic of South Africa (Limpopo and Mpumalanga Provinces).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Genus

Ebenacobius