Brachysomus (Hippomias)

Yunakov, Nikolai, 2022, A review of the genus Brachysomus Schoenherr (Coleoptera: Curculionidae: Entiminae), Zootaxa 5193 (1), pp. 1-165 : 19

Hippomias : B. transsylvanicus group

1 Scales on elytra bifurcate apically........................................................................ 2

- Scales on elytra lanceolate or weakly bifurcate apically....................................................... 8

2 Pterygia projecting from contour of rostrum................................................................ 3

- Pterygia not projecting or weakly projecting from contour of rostrum............................................ 7

3 Body length 1.60–1.98 mm............................................................................. 4

- Body length 2.25–2.55 mm............................................................................. 5

4. Epifrons with weak median longitudinal sulcus. Hind tibiae in male evenly covered with short, light, straight hairs. Male 5th ventrite almost flat, apical part without depression............................................... B. verae Košťál

- Epifrons without median longitudinal sulcus. Hind tibiae in male internally more densely covered with long, light, curly hairs. Male 5th ventrite strongly convex, apical part with weak depression.............................. B. argutus Yunakov

5 Pronotum strongly constricted at base. Elytra strongly convex at the sides, in male ovate, in female broad-ovate................................................................................................ B. laticollis Košťál

- Pronotum weakly constricted at base. Elytra weakly convex at the sides, in male strongly elongate, almost parallel-sided, in female ovate......................................................................................... 6

6 Medial margin of hind tibiae in male emarginate ( Fig. 213F . Male 5th ventrite slightly flattened in apical part. Interstriae with short erect setae as long as 1/3 of interstrial width............................................... B. pelex Yunakov

- Medial margin of hind tibiae in male sharp and straight. Male 5th ventrite with weak depression on apical part. Interstriae with long erect setae as long as 2/3 of interstrial width........................................... B. moczarskii Penecke

7 Elytra weakly convex at the disc and at the sides. Eyes small, strongly convex. Setae along elytral interstriae weakly erect. Hind tibiae in male internally emarginate on apical third, with dense row of light hairs. Scales at the interstriae distinctly bifurcate. Epifrons separated from vertex by sharp transverse depression. Pterygia not projecting from outline of rostrum.......................................................................................... B. transsylvanicus (Seidlitz)

- Elytra strongly convex at the disc and at the sides. Eyes large, weakly convex. Setae along elytral interstriae strongly erect. Hind tibiae in male internally not emarginate and without row of hairs. Scales at the interstriae weakly bifurcate. Epifrons separated from vertex by weakly visible transverse depression. Pterygia slightly projecting from outline of rostrum................................................................................................... B. carpathicus Košťál

8 Epifrons with median longitudinal sulcus ( Fig. 216D ). Setae on elytral interstriae almost recumbent....... B. fallax Yunakov

- Epifrons without median longitudinal sulcus ( Fig. 215E ). Setae on elytral interstriae distinctly erect.................... 9

9 Eyes small, strongly convex (VW/ELD = 2.00–2.70), in lateral view their dorsal margin separated from dorsal outline of head by 0.50 ETD. Body with spatulate erect setae ( Fig. 215G ). Anterior half of pronotal disc more densely squamulate and setose than posterior half......................................................................... B. mikati Košťál

- Eyes large, weakly convex (VW/ELD = 1.70–1.90), in lateral view their dorsal margin separated from dorsal outline of head by 0.25 ETD. Body with slender, parallel-sided erect setae ( Fig. 217I ). Pronotal disc uniformly sparsely squamulate and setose. .................................................................................................. 10

10. Ventrite 5 of male with depression, elytra oblong-ovate ( Fig. 54 ). Aedeagus and endophallus ( Fig. 214A ). Spermatheca ( Fig. 214C )............................................................................. B. moczarskii Penecke

- Ventrite 5 of male without depression, elytra ovate ( Fig. 57 ) Aedeagus and endophallus ( Fig. 217E, G ). Spermatheca ( Fig. 217H )........................................................................... B. albanicus (Apfelbeck)

Figures

FIGURE 213. Brachysomus pelex: A: aedeagus; B: endophallic sclerites; C: tegmen; D: spermatheca; E: antenna; F: hind tibia of male; G: sternite VII.

FIGURE 214. Brachysomus moczarskii: A: aedeagus; B: tegmen; C: spermatheca. B. oertzeni: D: spermatheca.

FIGURE 215. Brachysomus mikati: A: aedeagus; B: endophallic sclerite; C: tegmen; D: spermatheca; E: head; F: hind tibia of male; G: scales of elytra.

FIGURE 216. Brachysomus fallax: A: aedeagus; B: tegmen; C: spermatheca; D: head; E: hind tibia of male; F: scales of elytra; G: deciduous process.

FIGURE 217. Brachysomus albanicus: A: body; B: head; C: hind tibia of male; D: sternite VIII of male; E: aedeagus; F: tegmen; G: endophallus; H: spermatheca; I: scales of elytra.

FIGURES 51–56. Brachysomus, dorsal habitus: 51: B. oertzeni (lectotype) 52: B. moczarskii, female. 53: B. assingi, 54: B. moczarskii, male, 55: B. curvimanus. 56: B. fallax.

FIGURES 57–62. Brachysomus, dorsal habitus: 57: B. albanicus. 58: B. commutatus. 59: B. mikati. 60: B. ponticus. 61: B. simulans. 62: B. rhinomioides.