Cryptolarynx oberlanderi Haran, 2023

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, European Journal of Taxonomy 877 (1), pp. 1-89 : 57-59

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 ).

Figures

Fig. 1 (Part I) (next page). Habitus of males of species of Cryptolarynx Van Schalkwyk, 1966 (dorsal view). A. C. vitis (Marshall, 1957). B. C. subglaber Haran sp. nov. C. C. squamulatus Haran sp. nov. D. C. muellerae Haran sp. nov. E. C. hirtulus Haran sp. nov. F. C. robustus Haran sp. nov. G. C. namaquanus Haran sp. nov. H. C. carinatus Haran sp. nov. I. C. variabilis Haran sp. nov. J. C. estriatus (Marshall, 1957). K. C. pyrophilus Haran sp. nov. L. C. pilipes Haran sp. nov. Not to scale.

Fig. 2 (Part I) (next page). Male genitalia of species of Cryptolarynx Van Schalkwyk, 1966. Penis in dorsal and lateral view (left), tegmen in dorsal view (middle) and details of apex of a parameroid lobe and spiculum gastrale in dorsal view (right). A. C. vitis (Marshall, 1957). B. C. subglaber Haran sp. nov. C. C. squamulatus Haran sp. nov. D. C. muellerae Haran sp. nov. E. C. hirtulus Haran sp. nov. F. C. robustus Haran sp. nov. G. C. namaquanus Haran sp. nov. H. C. carinatus Haran sp. nov. I. C. variabilis Haran sp. nov. J. C. estriatus (Marshall, 1957). K. C. pyrophilus Haran sp. nov. L. C. pilipes Haran sp. nov. Not to scale.

Fig. 3 (Part I) (next page). Habitus of males of species of Cryptolarynx Van Schalkwyk, 1966 (lateral view). A. C. vitis (Marshall, 1957). B. C. subglaber Haran sp. nov. C. C. squamulatus Haran sp. nov. D. C. muellerae Haran sp. nov. E. C. hirtulus Haran sp. nov. F. C. robustus Haran sp. nov. G. C. namaquanus Haran sp. nov. H. C. carinatus Haran sp. nov. I. C. variabilis Haran sp. nov. J. C. estriatus (Marshall, 1957). K. C. pyrophilus Haran sp. nov. L. C. pilipes Haran sp. nov. Not to scale.

Fig. 4 (Part I) (next page). Head of males of species of Cryptolarynx Van Schalkwyk, 1966. A. C. vitis (Marshall, 1957). B. C. subglaber Haran sp. nov. C. C. squamulatus Haran sp. nov. D. C. muellerae Haran sp. nov. E. C. hirtulus Haran sp. nov. F. C. robustus Haran sp. nov. G. C. namaquanus Haran sp. nov. H. C. carinatus Haran sp. nov. I. C. variabilis Haran sp. nov. J. C. estriatus (Marshall, 1957). K. C. pyrophilus Haran sp. nov. L. C. pilipes Haran sp. nov. Not to scale.

Fig. 5 (Part I). Ventrites of males of species of Cryptolarynx Van Schalkwyk, 1966. A. C. vitis (Marshall, 1957). B. C. subglaber Haran sp. nov. C. C. squamulatus Haran sp. nov. D. C. muellerae Haran sp. nov. E. C. hirtulus Haran sp. nov. F. C. robustus Haran sp. nov. G. C. namaquanus Haran sp. nov. H. C. carinatus Haran sp. nov. I. C. variabilis Haran sp. nov. J. C. estriatus (Marshall, 1957), with details of a cuticular carina (white arrows). K. C. pyrophilus Haran sp. nov. L. C. pilipes Haran sp. nov. Not to scale.

Fig. 7 (previous page). Habitus in natura, host plants and biotopes of species of Cryptolarynx Van Schalkwyk, 1966 Cryptolarynx and Hadrocryptolarynx Haran gen. nov. (part 2). A. Habitus of C. oberprieleri Haran sp. nov. on and at base of Oxalis glabra Thunb., Stellenbosch (JHAR01201). B. Patch of O. glabra, biotope of C. oberprieleri Haran sp. nov., Stellenbosch (JHAR01485). C. Burnt area near Montagu with patches of Oxalis pes-caprae L. resprouting; biotope of C. pyrophilus Haran sp. nov. (JHAR01528). D–F. Habitus, Oxalis cf. odorata J.C.Manning & Goldblatt, host and biotope of C. spinicornis Haran sp. nov., Sutherland (JHAR02512). G. Habitus of C. marshalli Haran sp. nov., near Worcester (JHAR02355). H. Oxalis imbricata Eckl. & Zeyh., hosting adults of C. marshalli Haran sp. nov., near Worcester. I. Shale Renosterveld vegetation type on hillsides at Worcester, biotope of C. marshalli Haran sp. nov. (JHAR02355). J. Habitus of C. oberlanderi Haran sp. nov., near Worcester (JHAR02353). K. Oxalis depressa Eckl. & Zeyh., hosting adults of C. oberlanderi Haran sp. nov., near Worcester. L. Habitus of C. san Haran sp. nov., Langebaan Dune Strandveld vegetation type near West Coast National Park (JHAR02484). M. Habitus of male of Hadrocryptolarynx major Haran gen. et sp. nov., Klawer (JHAR02464). N. Habitus of female of Hadrocryptolarynx major Haran gen. et sp. nov., Klawer. O. Gallery formed by Hadrocryptolarynx major Haran gen. et sp. nov. under a leaf of Amaryllidaceae J.St.-Hil. P. Vanrhynsdorp Gannabosveld vegetation type near Vanrhynsdorp, biotope of Hadrocryptolarynx major Haran gen. et sp. nov.

Fig. 13. Distribution maps of species of Cryptolarynx Van Schalkwyk, 1966 and Hadrocryptolarynx Haran gen. nov.