Cryptolarynx carinatus Haran & Marvaldi & Benoit & Oberlander & Stals & Oberprieler 2023, sp. nov.
Creators: name: Haran, Julien M.
name: Marvaldi, Adriana E.
name: Benoit, Laure
name: Oberlander, Kenneth
name: Stals, Riaan
name: Oberprieler, Rolf G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Curculionidae
Cryptolarynx
Cryptolarynx carinatus

description: 8. Cryptolarynx carinatus Haran sp. nov.
urn:lsid:zoobank.org:act: D16B89D2-B0A2-4FA8-951C-04D8EC14AD97
Figs 1H, 2H, 3H, 4H, 5H, 6G–H, 8E
Differential diagnosis
Cryptolarynx carinatus sp. nov. is most similar to C. variabilis sp. nov. but distinguishable from it by the inner carina on the metatibiae, whose proximal edge forms a smaller angle with the tibial axis than in C. variabilis (Fig. 8E). The copulatory sclerite of the penis is divided into two blocks in C. carinatus, whereas it forms an entire sclerite in C. variabilis. Genetic distances between these two species were found to range between 10.5% and 17.4% for COI and 3.1% and 3.6% for EF1. They were also not found in sympatry, C. carinatus apparently restricted to the eastern slopes of Table Mountain and C. variabilis only found at several localities on the western slopes of the Hottentots Holland Mountains.
Etymology
The species name carinatus refers to the distinct proximal inner carina of the metatibiae in this species. The specific epithet is an adjective in the masculine form.
Material examined
Holotype REPUBLIC OF SOUTH AFRICA • ♂; “ REPUBLIC OF SOUTH AFRICA. Western Cape Province, [Cape Town,] Rondebosch Com. [Common] 26.vi.2019. J. Haran leg.” “ S33°57’10, E18°29’5, at base of Oxalis purpurea. JHAR02336_0101. Cirad-CBGP coll.” “Holotype. Cryptolarynx carinatus. Haran 2023”; SAMC.
Paratypes REPUBLIC OF SOUTH AFRICA – Western Cape • 1 ♂, 3 specs (preserved in ethanol); same collection data as for holotype; CBGP • 4 specs; Cape Town, Constantia; [34.025° S, 18.423° E]; Sep. 1885; “ Cryptolarynx nr. vitis (Marshall) det. R. Oberprieler, 1988”; SAM-COL-A052010; SAMC.
Description (♂)
MEASUREMENTS. Body length 2.7–3 mm.
COLOUR AND VESTITURE. Body integument black, scapes and tarsi reddish. Dorsal vestiture (pronotum + elytra) consisting of overlapping, recumbent, parallel-sided clothing scales, 2–3× as long as wide, truncate or rounded at apex; colour of scales varying from greyish to pale brown to black; pale scales concentrated in two longitudinal stripes on pronotum and at base of elytral interstriae 4, white scales forming a pair of spots surrounded by black scales at apical ⅔ of elytra; scales of interstriae recumbent, in lateral view not distinct from rest of vestiture.
HEAD. Forehead as wide as epifrons near antennal insertions, as wide as width of an eye, scales recumbent. Eyes convex, in dorsal view slightly exceeding outline of head, surrounded by a ring of short pale scales, on forehead directed towards occiput; distance between eye and scrobe slightly smaller than width of antennal club. Epifrons with distance between antennal insertions 0.67× length of scape, scales at least 2× as long as wide, recumbent, subcontiguous. Frons with pairs of erect lateral setae. Epsitome without median setae. Antennal funicles with segment 1 elongate; 2 half as long as 1, at most 2 × as long as wide; 3–4 globular, isodiametric, compressed, slightly angular on inside; 5–7 globular, isodiametric; 7 sometimes wider than long.
PRONOTUM. Transverse (W:L ratio 1.4–1.5), widest near midlength, sides arcuate; width of apex 0.67 × width of base.
ELYTRA. Broadly ovate, slightly wider than long (W:L ratio 1.1), sides convex, widest near midlength.
LEGS. Protibiae with outer margin straight, inner margin slightly bisinuate; metatibiae with apical mucro and inner setal fringe, setae shorter than segment 5 of metatarsus; metatibiae proximally with inner carina set off at 45° angle to outer margin. Tarsi with segment 2 wider than long.
ABDOMEN. Ventrite 1 concave medially, impression devoid of scales, with long setae only; ventrites 1–4 with creamy-white or greyish plumose scales, not concealing integument, intermixed with long suberect setae, each apically bifid.
TERMINALIA. Body of penis moderately elongate (W:L ratio 0.4), as long as temones, sides subparallel, converging near apex; curvature in profile weak and regular, dorsoventrally narrowed before apex. Copulatory sclerite serrate, divided into two sections, a long part near body of penis and a second, shorter part near apices of temones. Parameroid lobes separate, divided by moderate median notch, each lobe broad, bearing a series of long setae directed apicad. Spiculum gastrale with basal arms long and regularly curved.
Sexual dimorphism
Female unknown.
Life history
All specimens of C. carinatus sp. nov. were collected at the base of Oxalis purpurea L. plants, in the month of June.
Distribution
The species in only known to occur in the Rondebosch Common and at Constantia in Cape Town (Fig. 13).
description: Published as part of Haran, Julien M., Marvaldi, Adriana E., Benoit, Laure, Oberlander, Kenneth, Stals, Riaan & Oberprieler, Rolf G., 2023, Revision of the enigmatic South African Cryptolaryngini (Coleoptera, Curculionidae), with description of a new genus and twenty-two new species, pp. 1-89 in European Journal of Taxonomy 877 (1) on pages 30-34, DOI: 10.5852/ejt.2023.877.2151, http://zenodo.org/record/8110586