Ellimenistes marshalli Borovec & Nakládal, 2019

Borovec, Roman & Nakládal, Oto, 2019, Ellimenistes humeralis Marshall, 1947 and its allies (Coleoptera: Curculionidae: Entiminae: Embrithini), Zootaxa 4563 (1), pp. 175-184 : 181-182

Ellimenistes marshalli Borovec & Nakládal , sp. nov.

( Figs 3 , 11, 14, 18 , 22, 28 ) http://zoobank.org/ urn:lsid:zoobank.org:act:CA16AB12-4E4C-46AF-8FBA-D8AA3F354BF8

Type locality. South Africa, Eastern Cape, Port Elizabeth .

Type material. Holotype: ♂, ‘[ South Africa, Eastern Cape], Algoa Bay [Port Elizabeth now], Cape Col., Dr. Brauns [lgt.]’ ( BMNH) . Paratypes: 3 ♂♂, the same data as holotype ( BMNH) ; 1 ♂, ‘[ South Africa, Eastern Cape] Capland, Algoa Bay [Port Elizabeth now], 1.12.[18]95, Dr. Brauns [lgt.]’ ( BMNH) ; 1 ♂ 1 ♀, ‘[ South Africa, Eastern Cape], Algoa Bay [Port Elizabeth now], Capland, Dr. Brauns [lgt.]’ ( BMNH) .

Description. Body length 3.44–4.16 mm, holotype 3.51 mm. Elytra with moderately large appressed scales, 5– 6 across one interval, scales rounded, slightly striolate, slightly imbricate. Each elytral interval with one regular row of setae, very different in shape and length: 1. disc with inconspicuous, semiappressed, subspatulate setae, apically rounded, weakly striolate, faintly longer and wider than one appressed scale, and 2. apical declivity with conspicuous erect setae, slender, parallel-sided, apically subtruncate, slightly longer than width of one interval, distance of two setae equal to their length. Pronotum and head with rostrum with dense, short, irregularly scattered spatulate appressed setae. The whole antennae and legs densely covered by rounded appressed setae and semiappressed slender setae. Elytra with dark blackish brown and light brownish small spots, intervals 3 and 5 also with several spots of greyish scales.

Rostrum and head as in E. humeralis ( Figs 4, 7 ), only 1.19–1.25× wider than long.

Antennae with scape 1.2× longer than funicle, curved at basal third and weakly enlarged at apical part, at apex 1.2× as wide as club; funicle segments 1 and 2 conical, equally wide, segment 2 1.1× longer than segment 1; segment 1 2.1× longer than wide; segment 2 2.3–2.4× longer than wide; segment 3 1.3–1.4× longer than wide; segment 4 1.2–1.3× longer than wide; segments 5–7 isodiametric; club 2.0–2.2× longer than wide.

Pronotum ( Fig. 3 ) as in E. humeralis , 1.64–1.71× wider than long.

Elytra ( Fig. 3 ) 1.14–1.18× longer than wide, oval, subparallel-sided with straight sides, apically broadly rounded, at base sinuate; striae narrow, intervals wide and flat, intervals 3 and 5 behind base elevated and anteriorly exceeding the base, intervals 7 and 8 with a distinct basal projection, distinctly prominent laterally, projection on interval 8 shortly behind that on interval 7. Elytra laterally weakly regularly vaulted.

Tibiae as in E. humeralis . Tarsi with segment 2 1.3–1.4× wider than long; segment 3 1.3–1.4× wider than long and 1.2× as wide as segment 2; onychium 1.4× longer than segment 3; claws solidly fused at basal half.

Penis ( Fig. 11 ) short and slender, widest at base, tapered apicad with concave sides, apex narrowly rounded; laterally weakly regularly curved, wide, evenly tapered apicad, tip elongate, drop-shaped; temones 2.6–2.8× longer than body of penis. Tegmen ( Fig. 14 ) with wide ring and distinct, basally shortly connected parameres, tegminal manubrium short, 1.4× longer than diameter of ring. Sternite IX with slender apical plate.

Spermatheca ( Fig. 18 ) with regularly curved cornu and elongate, apically tapered and slightly curved corpus; ramus very short, rounded, hump-shaped; nodulus tube-shaped, twice longer than wide, weakly curved, half as long as cornu. Sternite VIII ( Fig. 22 ) and gonocoxites ( Fig. 28 ) as in E. humeralis , only plate of sternite VIII with concave sides.

Biology. Unknown.

Etymology. The newly described species is dedicated to the excellent expert of South African entimines, Guy Anstruther Knox Marshall (1871–1959), who described several new Ellimenistes species and who made a big contribution to the knowledge of that genus.

Differential diagnosis. Among species of the E. humeralis group this species is easily distinguishable by setae at posterior elytral declivity conspicuous, erect, about as long as width of one interval.

Figures

FIGURES 1–3. Dorsal habitus of Ellimenistes Boheman. 1. E. humeralis Marshall; 2. E. janaki sp. n.; 3. E. marshalli sp. n.

FIGURES 4–19. Structural details of Ellimenistes Boheman. Figs 4–6, head with rostrum, dorsal view: 4. E. humeralis Marshall; 5. E. janaki sp. n.; 6. E. raucus sp. n. Figs 7–9, head with rostrum, lateral view: 7. E. humeralis Marshall; 8. E. janaki sp. n.; 9. E. raucus sp. n. Figs 10–12, penis, ventral and lateral view: 10. E. janaki sp. n.; 11. E. marshalli sp. n.; 12. E. raucus sp. n. Figs 13–15, tegmen, dorsal view: 13. E. janaki sp. n.; 14. E. marshalli sp. n.; 15. E. raucus sp. n. Figs 16–19, spermatheca: 16. E. humeralis Marshall; 17. E. janaki sp. n.; 18. E. marshalli sp. n.; 19. E. raucus sp. n.

FIGURES 20–29. Structural details of Ellimenistes Boheman, Cycliscus Schoenherr and Cosmorhinus Schoenherr. Figs 20– 25, sternite VIII of female, dorsal view: 20. Ellimenistes humeralis Marshall; 21. E. janaki sp. n.; 22. E. marshalli sp. n.; 23. E. raucus sp. n.; 24. Cycliscus caecicollis Boheman; 25. Cosmorhinus cervinus Boheman. Figs 26–29, ovipositor, dorsal view: 26. Ellimenistes humeralis Marshall; 27. E. janaki sp. n.; 28. E. marshalli sp. n.; 29. E. raucus sp. n.