Janakius sylvaticus Borovec & Skuhrovec, 2019

Borovec, Roman & Skuhrovec, Jiří, 2019, Two new genera of Trachyphloeini with a key to the genera of small terricolous South African Trachyphloeini and Embrithini (Coleoptera: Curculionidae: Entiminae), Zootaxa 4695 (5), pp. 451-476 : 461-464

Janakius sylvaticus Borovec & Skuhrovec , sp. nov.

( Figs 4 A–I, 5A–E)

http://zoobank.org/ urn:lsid:zoobank.org:act:F06E27D3-3009-4188-BA2F-22DE5B867AA2

Type locality. Woody Cape in Addo Elephant National Park ( South Africa, Eastern Cape) .

Type material. Holotype. ♂, ‘RSA [ South Africa], Eastern Cape, Woody Cape, in Addo Eleph.[ant] NP [Nati- onal Park], 33°42′ S 26°24′ E, 4.ii.2012, Langebos, indig.[enous] forest, forest litter at the base of high trees, sifting , J. Janák lgt.’ ( TMSA). Paratypes. 67 ♂ ♀, the same data as holotype ( JJRC, JSPC, NMPC, RBSC, TMSA) ; 13 ♂ ♀, ‘ South Africa, Eastern Cape, „ La Repos “ forest 8 km S of Alexandria, 33°45′ S, 26°25′ E, 4.xii.2006, sifting, J. Janák lgt.’ ( JJRC) ; 2 ♀♀, ‘ S. Afr.; SE. Cape, Prov. Alexandria, For. St. , 33.43 S– 26.23 E, 5.12.1987; E-Y: 2553, ground traps, 2 days, groundtrap with faeces bait, leg. Endrödy-Younga’ ( TMSA) ; 1 spec., ‘ZA [ South Africa], E [Eastern] Cape, road N2, 10 km SW Grahamstown , 33°12′18″ S, 26°28′58″ E, 14.XI. 2006, 350 m, E. Colonnelli [lgt.]’ ( ECRI) .

Description ( Figs 4 A–I, 5A–E). Body length 1.88–2.44 mm, holotype 2.25 mm. Appressed scales on elytra rounded, distinctly longitudinally finely striate, 4 across one elytral interstria, slightly imbricated. Appressed scales on pronotal disc with indistinct structure, lateral paler stripes with scales irregularly angular, distinctly depressed in the middle; base of pronotum with slender transverse stripe of about three irregular rows of small, rounded, densely placed yellowish-brown scales. Head with rostrum, scapes, femora and tibiae with identical scales as elytra, on antennae and legs slightly smaller. Elytral raised setae create one dense regular row on each interval, distance between two setae slightly longer than length of one seta, on disc with semiappressed shorter, slender setae, about as long as half width of one interval, visible mainly in lateral view, at posterior declivity setae semierect, subspatulate, distinctly longer than half width of one interval, conspicuous. Disc of pronotum and rostrum with short, slender, semiappressed setae as on elytral disc, lateral stripes of pronotum and interocular space with long, semierect, subspatulate setae as on elytral declivity. Femora with semiappressed, scapes and tibiae with semierect short, slender setae; funicles with semierect moderately long dark brownish piliform setae; tarsi with semierect short yellowish setae.

Rostrum 1.40–1.47 × as wide as long ( Fig. 5B ).

Scapes ( Fig. 5A ) 3.97–4.12 × as long as wide, 1.21–1.24 × as long as funicles. Funicle segment 1 1.5–1.6 × as long as wide, 1.8–2.0 × as long as segment 2, which is 1.1–1.3 × as long as wide; segments 3–6 1.7–1.8 × as wide as long; segment 7 1.5–1.6 × as wide as long; clubs 1.5–1.6 × as long as wide.

Pronotum ( Fig. 5A ) 1.37–1.47 × as wide as long, with distinctly rounded sides; in lateral view weakly vaulted. When scraped disc finely and densely punctured, matt, only narrow stripe just behind anterior margin unpunctured, smooth, shiny, paler, reddish.

Elytra ( Fig. 5A ) 1.18–1.26 × as long as wide, moderately wider than pronotum, disc in lateral view vaulted. When scraped intervals smooth, shiny, slightly vaulted; striae moderately wide, distinctly densely punctured.

Protibiae ( Fig. 5A ) robust, 4.05–4.43 × as long as wide. Tarsal segment 2 1.5–1.6 × as wide as long; segment 3 1.4 × as wide as long and 1.3–1.4 × as wide as segment 2; onychium equally long as segment 3.

Male genitalia. Penis ( Fig. 5D ) widest at apical third, regularly tapered basad with slightly concave sides, apex regularly broadly rounded; in lateral view curved, apical half about evenly tapered apicad.

Female genitalia. Spermatheca ( Fig. 4I ) with very slender and moderately short cornu; corpus large, elongate, subtriangular, with ramus very short and wide and nodulus slender, short and turned.

Derivation of name. Named from the Latin sylvaticus , meaning occurring in the forest, in reference to the circumstances of collection.

Biology. The type specimens were sifted from litter of native forest at the base of high trees ( Fig. 6 ).

Distribution. South Africa, Eastern Cape.

Figures

FIGURE 4. Janakius sylvaticus sp. nov. A—habitus, ventral view, male; B—rostrum without scales, dorsal view, male; C— rostrum without scales, lateral view, male; D—head, ventral view, male; E—ventrites, female; F—tegmen, male; G—sternite VIII, female; H—gonocoxites; I—spermatheca. Scale bars: 0.5 mm (F, G), 0.25 mm (H, I).

FIGURE 5. Janakius sylvaticus sp. nov. A—habitus, dorsal view, male; B—rostrum, dorsal view, male; C—rostrum, lateral view, male; D—aedeagus; E—protibia, male. Scale bars: 1 mm (A), 0.5 mm (D).

FIGURE 6. Habitat of Janakius sylvaticus sp. nov. Adults were sifted in indigenous forest from litter at base of high trees, photo J. Janák.