Cryptolarynx marshalli 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 : 54-56

19. Cryptolarynx marshalli Haran sp. nov.

urn:lsid:zoobank.org:act:B4281E9A-F0FF-42D4-8099-9ADA5005C6E5

Figs 1S , 2S , 3S , 4S , 5S , 7G–I

Differential diagnosis

Cryptolarynx marshalli sp. nov. is closely related to C. oberprieleri sp. nov. but distinctly more elongate, and the apex of its parameroid lobes is also distinct ( Fig. 2O–S ). See Differential diagnosis section under species C. oberprieleri for the genetic distances between these species.

Etymology

This species is dedicated to the late weevil expert Sir Guy A.K. Marshall, who described the genus and its original two species and discussed its unique characters among known weevils. 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.” “ 33.613° S 19.447° E. at base of Oxalis imbricata . JHAR02355_0101. Cirad-CBGP coll.” “Holotype. Cryptolarynx marshalli . Haran 2023”; SAMC.

Paratypes REPUBLIC OF SOUTH AFRICA – Western Cape • 1 ♂, 2 specs; same collection data as for holotype; CBGP .

Description (♂)

MEASUREMENTS. Body length 2.5–2.9 mm.

COLOUR AND VESTITURE. Body integument black, antennae, tibiae and tarsi reddish. Dorsal vestiture (pronotum + elytra) consisting of overlapping, recumbent, parallel-sided clothing scales, 3× as long as wide, truncate at apex; colour of scales mostly brown, white scales interspersed with pale brown scales concentrated in two longitudinal bands on pronotum, at base of elytral interstriae 4, and in a pair of pale spots surrounded by black scales at apical ⅔ of interstriae 3; scales of striae recumbent, in lateral view not or only very slightly distinct from rest of vestiture.

HEAD. Forehead wide, slightly wider than epifrons near antennal insertions, scales suberect. 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 slightly smaller than length of scape, scales at least 2 × as long as wide, recumbent, mostly non-contiguous. Frons with 3 pairs of erect lateral setae. Epistome without median seta. Antennal funicles with segment 1 moderately elongate, 1.5 longer than wide; 2 subequal in length to 1; 2 and 4 compressed, slightly angular on inside; 5–7 globular, isodiametric or wider than long.

PRONOTUM. Moderately transverse (W:L ratio 1.2), widest near midlength, sides arcuate; apex and base subequal in width.

ELYTRA. Bullet-shaped, longer than wide (W:L ratio 0.85), sides convex, widest anteriorly of midlength.

LEGS. Slender. 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 wider than long.

ABDOMEN. Ventrite with creamy-white plumose scales not fully 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 with scales concentrated laterally and on basal third.

TERMINALIA. Body of penis moderately elongate (W:L ratio 0.45), slightly shorter than temones, sides convex; curvature in profile weak, stronger in basal half, not dorsoventrally narrowed at apex. Copulatory sclerite weakly sclerotised or not discerned in examined specimens. Parameroid lobes separate, divided by modest median notch, each lobe broad, bearing a series of setae directed apicad, median setae longer. Spiculum gastrale with basal arms long, right arm slightly angulate at its midlength.

Sexual dimorphism

The sexes can be distinguished by the elytra (shorter in male) and by ventrite 1 in the female lacking the long, deeply divided setae.

Life history

All specimens of this species were collected in July at the base of Oxalis imbricata Eckl. & Zeyh. plants.

Distribution

The species is only known from the type locality ( 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.