Cryptolarynx oberlanderi 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 oberlanderi

description: 21. Cryptolarynx oberlanderi Haran sp. nov.
urn:lsid:zoobank.org:act: 4AD62755-5B76-406D-84AC-D5A8C49EE048
Figs 1U, 2U, 3U, 4U, 5U, 7J–K
Differential diagnosis
Cryptolarynx oberlanderi sp. nov. is very similar to C. san sp. nov. and C. luteipennis sp. nov. but distinguishable from these by its narrower forehead and non-overlapping scales on the epifrons, and the apex of its parameroid lobes is also distinct among these species. Cryptolarynx oberlanderi was found to be genetically distinct from C. luteipennis and C. san by 8.1% and 15.1% for COI and by 3.7% and 4.0% for EF1, respectively.
Etymology
This species is dedicated to our colleague Kenneth Oberlander, specialist of the taxonomy of the genus Oxalis. Thanks to his substantial help with the location and identification of species of this genus, numerous new species of Cryptolarynx were discovered, including this one. The specific epithet is a noun in the genitive case.
Material examined
Holotype REPUBLIC OF SOUTH AFRICA • ♂; “REPUBLIC OF SOUTH AFRICA. Western Cape Province. Worcester. 3.vii.2019. J. Haran leg.” “ 33.639° S 19.391° E, at base of Oxalis depressa. JHAR02353_0101. Cirad-CBGP coll.” “Holotype. Cryptolarynx oberlanderi. Haran 2023”; SAMC.
Paratypes REPUBLIC OF SOUTH AFRICA – Western Cape • 1 ♀; same collection data as for holotype; SAMC • 1 ♂, 7 specs (preserved in ethanol); same collection data as for holotype; CBGP • 1 ♂, 1 spec.; Hex River Valley, Kanetvlei, GG Camp Sandhill; 33.509° S, 19.574° E; 3 Jul. 2019; J. Haran leg.; at base of Oxalis depressa; JHAR03227; CBGP.
Description (♂)
MEASUREMENTS. Body length 2.1–3.0 mm.
COLOUR AND VESTITURE. Body integument black, scapes and tarsi reddish. Dorsal vestiture (pronotum + elytra) consisting of overlapping, recumbent, parallel-sided or subtriangular clothing scales, isodiametric to 3 × as long as wide, truncate at apex; colour of scales brown; dark brown scales forming a longitudinal stripe medially on pronotum and elytral interstriae 1–3, pale brown scales concentrated laterally on pronotum and on elytra laterally of interstria 4; white scales surrounded by black scales forming a pair of pale spots on elytral interstriae 2–3 at apical ¾ of elytral length; scales of striae recumbent, in lateral view not distinct from the of vestiture.
HEAD. Forehead wide, slightly wider than epifrons near antennal insertions, scales recumbent, not concealing integument. Eyes convex, in dorsal view slightly exceeding outline of head, surrounded by a ring of short scales, on forehead directed towards occiput; distance between eye and scrobe smaller than width of antennal club. Epifrons with distance between antennal insertions as large as length of scape, scales in middle of epifrons at most 2× as long as wide, recumbent, non-contiguous. Frons with 3 pairs of long erect lateral setae. Epistome without median seta. Antennal funicles with segment 1 moderately elongate, 1.5× as long as; 2 slightly shorter, 2 and 4 compressed, slightly angular on inside; 5–7 globular, isodiametric.
PRONOTUM. Moderately transverse (W:L ratio 1.25), widest near midlength, sides arcuate; apex slightly narrower than base.
ELYTRA. Broadly ovate, slightly longer than wide (W:L ratio 0.9), sides convex, widest anterior of midlength.
LEGS. Tibiae with apical mucro; protibiae with outer margin straight, inner margin slightly bisinuate; metatibiae with inner setal fringe, setae shorter than segment 5 of metatarsus. Tarsi with segment 2 of protarsus transverse, of meso- and metatarsus isodiametric.
ABDOMEN. Ventrite with creamy-white plumose scales not concealing integument, scales on ventrites 2–5 medially intermixed with long suberect setae, apically bifid or not; ventrite 1 slightly concave medially, impression covered with long setae deeply divided from their bases; ventrite 5 almost completely devoid of scales except for a series of small scales along suture, medially with a smooth area without setae or punctures.
TERMINALIA. Body of penis moderately elongate (W:L ratio 0.6), 2× as short as temones, sides slightly convex, converging in apical quarter; in profile straight, weakly downcurved and dorsoventrally narrowed at apex. Copulatory sclerite weakly sclerotised or not discerned in examined specimens. Parameroid lobes separate, divided by modest median notch, each bearing a series of setae directed apicad, longer medially, longest setae longer than depth of median notch. Spiculum gastrale with basal arms long, right arm slightly angulate near midlength.
Sexual dimorphism
The sexes can be distinguished by the elytra (longer in the female) and by abdominal ventrite 1 lacking long, deeply divided setae in the female.
Life history
The known specimens of C. oberlanderi sp. nov. were all found in July, at the base of plants of Oxalis depressa Eckl. & Zeyh.
Distribution
The species is only known from the Hex River valley and the Worcester area (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 57-59, DOI: 10.5852/ejt.2023.877.2151, http://zenodo.org/record/8110586