Cryptolarynx spinicornis 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 : 50-51

16. Cryptolarynx spinicornis Haran sp. nov.

urn:lsid:zoobank.org:act:73337A01-7C56-441F-8DDF-E100910E5B7A

Figs 1P , 2P , 3P , 4P , 5P , 7D–F , 8A, H

Differential diagnosis

Cryptolarynx spinicornis sp. nov. differs from all other species of the genus by its enlarged funicle segments 2 and 4, bearing an inner tooth ( Fig. 8H ). A mitochondrial barcode fragment could not be obtained for it, probably due to mismatch in the primers sequences. Uncorrected p-distances of EF1 show that this species is closest to C. san sp. nov. but distant from it by 1.1% (Supp. file 1).

Etymology

The species name spinicornis is derived from the Latin nouns ‘ spina ’ (‘spine’) and ‘ cornu ’ (‘horn’, ‘antenna’) and refers to the teeth on funicle segments 2 and 4 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, Klawer [13 km S]. 26.vii.2019. J. Haran leg.” “ 31.902° S 18.630° E, at base of Oxalis cf. luteola . JHAR02465_0101. Cirad-CBGP coll.” “Holotype. Cryptolarynx spinicornis . Haran 2023”; SAMC.

Paratypes REPUBLIC OF SOUTH AFRICA – Western Cape • 1 ♂, 2 specs (preserved in ethanol); same collection data as for holotype; CBGP . – Northern Cape • 2 ♂♂, 18 specs (preserved in ethanol); Sutherland 21 km SW, Blesfontein Farm ; 32.462° S, 20.436° E; 18 Aug. 2019; J. Haran leg.; at base of Oxalis cf. odorata ; JHAR02512; CBGP .

Description (♂)

MEASUREMENTS. Body length 1.7–3.0 mm.

COLOUR AND VESTITURE. Body integument black, antennae, tarsi and sometimes tibiae reddish. Dorsal vestiture (pronotum + elytra) consisting of overlapping, recumbent, parallel-sided clothing scales, 3× as long as wide, truncate at apex; colour of scales pale to dark brown; pale scales generally concentrated in two lateral bands on pronotum and on elytral interstriae 4 as well as forming a pair of white spots surrounded by darker scales at apical ⅔ of interstriae 2–3; dark scales concentrated in a pair of spots at base of pronotum near scutellar shield; scales of striae recumbent, in lateral view not distinct from rest of vestiture.

HEAD. Forehead slightly wider than epifrons near antennal insertions, slightly wider than 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 smaller than width of antennal club. Epifrons with distance between antennal insertions as large as length of scape, scales in middle of epifrons at least 3× as long as wide, recumbent, not contiguous. Frons with 3 pairs of erect lateral setae. Epistome without median seta. Antennal funicles with segment 1 very elongate, 2× as long as 2; 2 and 4 compressed, strongly angular, toothed on inside; 3 isodiametric or slightly longer than wide; 5–7 globular, isodiametric.

PRONOTUM. Transverse (W:L ratio 1.4), widest anteriorly of midlength, sides arcuate; apex slightly narrower than base.

ELYTRA. Bullet-shaped, longer than wide (W:L ratio 0.9), sides convex, widest anteriorly of midlength.

LEGS. All tibiae with small 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 wider than long on forelegs and longer than wide on hindlegs.

ABDOMEN. Ventrites with creamy-white plumose scales partly concealing integument, with long suberect setae not or only slightly bifid at apex, concentrated medially; ventrite 1 slightly concave medially, impression devoid of scales; ventrite 5 with scales concentrated laterally, medially bare.

TERMINALIA. Body of penis moderately elongate (W:L ratio 0.4), slightly shorter than temones, sides subparallel in basal ⅔, converging in apical third; curvature in profile moderate and regular, more strongly downcurved near apex, dorsoventrally narrowed before apex. Copulatory sclerite shaped like a pair of sickles. Parameroid lobes separate, divided by deep median notch, each lobe slightly bilobate, with median sublobes bearing several long setae apically. Spiculum gastrale with basal arms long, right arm angulate at its midlength.

Sexual dimorphism

The sexes can be distinguished by the shape of the elytra (shorter in male than in female) and the forehead (narrower in male than in female).

Life history

Specimens of Cryptolarynx spinicornis sp. nov. were found at the bases of plants of Oxalis cf. luteola Jacq. and O. cf. odorata J.C. Manning & Goldblatt at sites where O. obtusa was also present.

Distribution

The species occurs in the Vanrhynsdorp area and up to 1500 m above sea level on the Great Escarpment near Sutherland ( Fig. 13 ).

Remarks

Mitochondrial barcode sequences could not be obtained for this species, probably due to a mismatch in the primer sequences.

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. 8 (next page). Structural details and measurements of Cryptolaryngini Van Schalkwyk, 1966. A. Cryptolarynx spinicornis Haran sp. nov., cephalic view, arrows indicating width of forehead (top) and of epifrons (bottom). B. Head of C. pyrophilus Haran sp. nov., lateral view, arrows indicating distance between eye and scrobe. C. Head of C. pyrophilus Haran sp. nov., in cephalic view, arrows showing prothoracic scales near eyes (top), position of scape when antennae in repose (middle) and position of clubs near procoxae when in repose (bottom). D. C. namaquanus Haran sp. nov., dorsal view, arrows indicate length and width dimensions of pronotum and elytra as measured.E. Metafemora and metatarsus of C. variabilis Haran sp. nov. (left) and C. carinatus Haran sp. nov. (right), arrows indicating position of proximal inner carina in latter species (highlighted with a white line in C. variabilis Haran sp. nov.) and short apical mucro. F. Metatarsus of Hadrocryptolarynx major Haran gen. et sp. nov., arrow indicating elongate segment 2 (longer than wide). G. Hindleg of C. vitis (Marshall, 1957), arrow indicating apical mucro. H. Antenna of C. spinicornis Haran sp. nov., arrows pointing at inner tooth of funicle segments 2 and 4. I. Protibia of C. armatus Haran sp. nov., arrow pointing at inner preapical expansion proximally of mucro. J. Penis of C. oberprieleri Haran sp. nov., dorsal view, black arrows indicating length of penis body and temones and white arrows indicating width of penis body as measured; bottom arrow indicating copulatory sclerite. K. Ovipositor, Crypolarynx variabilis Haran sp. nov. L. Sternite VIII, same species. M. Spermatheca, same species. N. Ovipositor, Hadrocryptolarynx major Haran gen. et sp. nov. O. Sternite VIII, same species. P. Spermatheca, same species. Q. Right maxilla, same species. Not to scale.

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