Derelomus costalis Fåhraeus, 1844: 93 Hesse , 1929: 530 Ebenacobius Haran, a new southern African genus of flower weevils (Coleoptera: Curculioninae: Derelomini) associated with dicotyledonous plants Haran, Julien Benoit, Laure Procheş, Şerban Kergoat, Gael J. European Journal of Taxonomy 2022 2022-05-05 818 1 1 54 (Fahraeus, 1844) Haran & Benoit & Procheş & Kergoat 2022 Fahraeus 1844 [453,912,888,915] Insecta Curculionidae Ebenacobius Animalia Coleoptera 22 23 Arthropoda species costalis gen. et comb. nov.   Figs 1E, I, 2E, 4I, 6E      Derelomus costalis Fåhraeus, 1844: 93.    Derelomus rugosicollis   Hesse, 1929: 530. Syn. nov.    Differential diagnosis   Ebenacobius costalis gen. et comb. nov.can be distinguished from other species of the genus by the combination of basal ⅓ of first stria with a single row of at least slightly misaligned punctures ( Fig. 1E) and by the rostrum moderately downcurved and only slightly longer than prothorax (1.1 ×) in lateral view ( Fig. 4I).    Type material    Lectotypeof   Derelomus costalis Fåhraeus, 1844(here designated) REPUBLIC OF SOUTH AFRICA• “ ♂” “ Cap. B. Spei.[ REPUBLIC OF SOUTH AFRICA, Western Cape Province]” “Drege” “3758. E91+” “Lectotype ♂;  Derelomus. costalis; Fåhraeus, 1844; Haran Des. 2022” “  Ebenacobius;  costalis; ( Fåhraeus, 1844); Haran 2022”; NHRS.    Lectotypeof   Derelomus rugosicollis Hesse, 1929(here designated) REPUBLIC OF SOUTH AFRICA• 1 ♂; “ Mfongosi; Zululand[REPUBLIC OF SOUTH AFRICA, KwaZulu-Natal Province]” “Zululand; Mfongosi;  Apr 1923; W E Jones” “  Derelomus;  rugosicollis; Types Hesse” “Type [red label]” “Type; SAM/Ent; 4037 [red label]” “Lectotype ♂;  Derelomus; rugosicollis; Hesse, 1929; Haran Des. 2022” “  Ebenacobius;  costalis; ( Fåhraeus, 1844); Haran 2022”; SAMC.    Paralectotypeof   Derelomus costalis Fåhraeus, 1844 REPUBLIC OF SOUTH AFRICA• 1 ♀; same collection data as for lectotype of  Derelomus rugosicollisexcluding red type label; “Paralectotype ♀;  Derelomus; rugosicollis; Hesse, 1929; Haran Des. 2022” “  Ebenacobius;  costalis; ( Fåhraeus, 1844); Haran 2022”; SAMC.   Other material examined   REPUBLIC OF SOUTH AFRICA–  Eastern Cape Province• 1 ♀; Kirkwood; 33°22′48.0″ S, 25°27′36.0″ E;  15 Jul. 2019; J. Haranleg.; on yellow Asteraceae; JHAR02390_0101; CBGP • 1 ♂, 1 ♀; Alexandria Forest Station; 33°43′ S, 26°23′ E;  3 Dec. 1987; Endrödy-Youngaleg.; general collection; E-Y: 2549; TMSA • 1 ♀; Little Karoo, Baviaanskloof; 33°39′ S, 24°31′ E;  6 Dec. 1995; C.L. Bellamyleg.; beating; E-Y: 3172; TMSA. –  Kwazulu-Natal Province• 2 ♂♂; Pongolapoort; 27°25′15.7″ S, 31°55′10.3″ E;  Oct. 2009; Ş. Procheşleg.; on  Schotia brachypetala(Fabaceae); JHAR04161-62; CBGP. –  Western Cape Province• 1 ♀; Plettenberg Bay; 34°03′ S, 23°23′ E;  13 Feb. 1990; V.M. Uysleg.; SANC • 4 ♀♀; CT [ Cape Town];  Nov. 1900; CleDouxleg.; acc67769; USNM.    Redescription  Male BODY LENGTH. 3.0– 3.2 mm. COLOUR. Body integument pale brown, head reddish-brown, prothorax with two large dark-brown areas on each side on the median line, elytra generally with a dense network of transverse dark shades on basal ⅔, sometimes reduced to transverse band on apical ⅔ or absent; dorsum (prothorax + elytra) with minute recumbent setae, not contiguous. HEAD. Rostrum 1.1 × longer than prothorax in lateral view, moderately downcurved, slightly more near base; underside with row of setae, almost as long as 2 ndsegment of funicle, integument forming small tubercle before apex; in dorsal view covered with recumbent non-contiguous setae; antennae inserted at ⅔ of length; head capsule coarsely punctate in dorsal view, with non-contiguous setae, setae slightly longer near dorsal margin on eyes; eyes convex, exceeding the lateral curve of head capsule in dorsal view; antennal funicle with segment 1 elongate, 1.5 × longer than wide, as long as 2–4, 3–7 wider than long. PROTHORAX. Wider than long (W:L ratio: 1.3), widest near base, narrower there than elytra at humeral angles; sides subparallel in basal ¾, slightly and regularly converging apicad; apical constriction as long as width of funicle at apex; integument densely punctate, space between punctures smooth and shiny, narrower than or equal to diameter of punctures; setae in each puncture very short, recumbent, not exceeding in length the diameter of punctures; prosternal process reduced forming a small tubercle between the procoxae. ELYTRA. Sides slightly convex, widest near middle of length (W:L ratio: 0.68); humeri raised; apex jointly rounded; striae made of one row of more or less misaligned punctures, at least misaligned on basal ⅓ of stria 1, narrower than interstriae; interstriae flat, 1-3-5 convex apically, 9 entirely convex; scutellar shield rounded, glabrous. ABDOMEN. Underside covered with small non-contiguous whitish setae. LEGS. Profemora strongly thickened near middle of length; protibiae with external margin straight, meso- and metatibiae curved outward in apical half; tibiae armed with small apical mucro; claws simple. TERMINALIA. Body of penis elongate (W:L ratio: 0.32), as long as apodemes, sides slightly bisinuate in dorsal view, widest near apical ⅓, rounded and converging in apical ⅓, apex acuminate; in lateral view curvature stronger in basal ⅓, almost straight in apical ⅔, width slightly expanding apicad in basal ⅔ ( Fig. 6E).   Sexual dimorphism Females can be distinguished from males by their rostrum which is narrower and distinctly longer, 1.3 × longer than prothorax in lateral view ( 1.1 in ♂♂).    Remarks In the collection housed at NHRS, a male specimen with the labels “Cap. B. Spei.” and “Drège” and corresponding to the description of  Derelomus costalisin all respects was located. This specimen is the unique individual available and the description does not refer to a specific holotype, it is therefore here designated as the lectotypeof  Derelomus costalis Fåhraeus, 1844and was labeled accordingly. In the collections housed at SAMC, a male specimen with the labels “Mfongosi; Zululand” and “  Derelomus;  rugosicollis; Types; Hesse [hand written]” was identified. The description only refers to an undetermined number of males and females forming the type series. In the absence of a specific holotypedesignated for this species, the male specimen reported above is here designated as the lectotypefor  Derelomus rugosicollis Hesse, 1929and was labeled accordingly.A detailed examination of the external and internal morphology of this specimen revealed no differences with the lectotypeof  Derelomus costalis.The name  Derelomus rugosicollisis therefore a junior synonym of  Derelomus costalis. It should be noted that the lectotypesof both  D. costalisand  D. rugosicollisare young ill-sclerotized specimens and that their uniformly pale colour is not representative of the colour pattern of the species. A redescription of this species is provided to account for the patterns found on fully sclerotized specimens of this species. In some specimens from the western Capeand Kwazulu-NatalProvinces of the Republic of South Africa, striae 9 are not erased in basal 1/6, but subcontiguous or merged with striae of 10.   Fig. 4. A–J. Habitus of males of  EbenacobiusHaran gen. nov.in lateral view (part 1). A.  E. curvisetisHaran gen. et sp. nov. B.  E. thoracicusHaran gen. et sp. nov. C.  E. rectirostrisHaran gen. et sp. nov. D.  E. xhosaHaran gen. et sp. nov. E.  E. duplicatusHaran gen. et sp. nov. F.  E. sanHaran gen. et sp. nov. G.  E. grobbelaaraeHaran gen. et sp. nov. H.  E. kuscheliHaran gen. et sp. nov. I.  E. costalis( Fåhraeus, 1844) gen. et comb. nov. J.  E. mulanjensisHaran gen. et sp. nov.A–J = not to scale.   Life history The host plant of  E. costalis gen. et comb. nov.is unknown, adults have been sporadically collected on flowers of Asteraceaeand Fabaceae, which are probably only used as shelters by this species. Adults were collected in February, July, October, November and December.    Distribution  Republic of South Africa( Eastern Cape, Kwazulu-Nataland Western CapeProvinces). 3765338338 NHRS South Africa Cap. B. Spei. 22 23 1 1 Western Cape Province lectotype 3765338384 1923-04 SAMC W E Jones South Africa Zululand Mfongosi 22 23 1 1 KwaZulu-Natal Province lectotype 3765338331 1923-04 SAMC W E Jones South Africa REPUBLIC OF SOUTH AFRICA Mfongosi 22 23 1 1 1 KwaZulu-Natal Province paralectotype 3765338394 on yellow Asteraceae 2019-07-15 CBGP J. Haran South Africa -33.379997 Kirkwood 1 25.460001 Kirkwood 22 23 JHAR02390_0101 1 1 Eastern Cape Province 3765338340 1987-12-03 TMSA Endrody-Younga South Africa 23 24 -33.716667 Alexandria Forest Station 1203 26.383333 22 23 2 1 1 3765338418 1995-12-06 beating TMSA C. L. Bellamy South Africa -33.65 Little Karoo 1204 24.516666 23 24 1 1 Eastern Cape 3765338408 on Schotia brachypetala (Fabaceae) 2009-10 CBGP S. Proches South Africa -27.421026 Pongolapoort 1 31.919527 Pongolapoort 23 24 JHAR04161-62 2 2 Kwazulu-Natal Province 3765338410 1990-02-13 SANC V. M. Uys South Africa -34.05 Plettenberg Bay 1201 23.383333 23 24 1 1 Western Cape Province 3765338390 [275,1116,405,432] 1900-11 USNM CleDoux South Africa Cape Town Cape Town 23 24 4 4 Western Cape