Amicromias osellai, Germann, 2017

Germann, Christoph, 2017, Five new species of Amicromias Reitter, 1912 from Greece (Coleoptera: Curculionidae: Entiminae: Omiini), Zootaxa 4312 (2), pp. 311-322 : 313-314

Amicromias osellai sp. n.

( Figs 2 , 12–16 )

Type locality. Greece, nom. Argolidas , Monte Didimo, 1100 m.

Type material. Holotype: ♀, ‘ GRECIA, nom. Argolidas , Mte Didimo, 1100 m, 5.VI.2003, G. Osella leg.’ ( MCVR) . Paratype: 1 ♀, the same data as holotype ( GOVI) .

Description. Body length: holotype female 2.19 mm; paratype female 2.41 mm.

Body dark brownish, antennae and legs paler, reddish brown. Elytra with sparse, slender, long oval appressed scales not concealing integument ( Fig. 15 ), 3–4 across one interval width, space between two scales slightly narrower than width of one scale. Pronotum and head with rostrum with identical appressed scales, sparsely placed. Elytra with 1–2 irregular rows of short, dense, semierect, subspatulate setae, widest before tip, at most as wide as half of width of one interval, distance between two setae slightly shorter than length of one seta. Pronotum and head with rostrum with identical setae as those on elytra, only slightly shorter, densely irregularly scattered. Antennal scape and legs with moderately dense, semiappressed, slender, long oval greyish scales, not concealing integument; antennal funicle with semiappressed, short, greyish setae; clubs densely finely setose.

Rostrum ( Figs 12, 13 ) wide and short, 1.37–1.41× as wide as long, widest at base, at base 1.25–1.27× as wide as at apex, evenly tapered apicad with almost straight sides and without prominent pterygia. Epifrons narrow, 0.5 as wide as rostrum at the same place, with distinctly concave sides, shallowly longitudinally deepened. Frons glabrous, short, not separated from epifrons. Epistome not developed. Scrobes dorsally fully visible, pit-shaped; laterally subtriangular, conspicuously enlarged posteriad with straight borders directed above and below eyes, separated from eyes by slender squamose stripe. Rostrum in the same level as head. Eyes small, vaulted, weakly prominent from outline of head. Vertex wide, vaulted.

Antennal scape gradually enlarged apicad, distinctly curved at midlength, at apex slightly narrower than club. Funicle segment 1 1.4× as long as wide and 1.4× as long as segment 2, which is 1.2–1.3× as long as wide; segments 3–6 1.3× as wide as long; segment 7 1.4× as wide as long; club 1.7–1.8× as long as wide.

Pronotum ( Fig. 14 ) moderately slender, 1.28–1.33× as wide as long, widest behind midlength, anteriad only weakly more tapered than posteriad; disc regularly vaulted.

Elytra ( Fig. 14 ) long oval, slender, 1.47–1.55× as long as wide, with weakly rounded sides and regularly rounded shoulders, broadly rounded at apex; in lateral view flat. Striae distinctly punctured, moderately narrow; intervals flat.

Apex of protibiae only slightly enlarged outside, rounded, with fine, yellowish, sparse setae, longer in outer part than in inner one. Tarsi with segment 2 1.1–1.2× as wide as long; segment 3 1.2–1.3× as wide as long and 1.4– 1.5× as wide as segment 2; onychium 1.1× as long as segment 3; claws fused at basal part, weakly divorced.

Female genitalia. Spermatheca ( Fig. 16 ) with long, slender, regularly curved cornu; ramus weakly rounded, isodiametric, twice as long and wide as nodulus, which is subsquared. Gonocoxites long and slender, weakly tapered apicad, narrowly rounded at apex, with fine setae, without styli. Sternite VIII with small subtriangular plate with sclerotised basal margin and long and slender apodeme, 3.7× as long as plate.

Etymology. This species is dedicated to its collector, eminent Italian expert on Curculionidae Giuseppe Osella (Verona) , who organized various collecting trips to Greece, mainly to the Peloponnesos.

Bionomy. Unknown.

Differential diagnosis. Amicromias osellai sp. n. belongs near A. cephalotes Yunakov, 2005 , known also from Peloponnesos, by its sparse appressed scales on elytra, erect setae subspatulate, apical margin of protibiae with sparse setae, the slender pronotum and rostrum evenly tapered anteriad with straight sides and without prominent pterygia. The species can be distinguished using the following characters:

1. Elytra slender, sides subparallel, 1.47–1.55× as long as wide, laterally flat. Pronotum slender, 1.28–1.33× as wide as long. Elytral intervals with 2 irregular rows of erect setae................................................. A. osellai sp. n.

- Elytra short oval, with distinctly rounded sides, 1.27–1.31× as long as wide, laterally vaulted. Pronotum wider, 1.49–1.52× as wide as long. Elytral intervals with one regular row of erect setae......................... A. cephalotes Yunakov, 2005

Figures

FIGURES 1 – 6. Habitus of new Amicromias species: 1) A. cunevi sp. n., holotype; 2) A. osellai sp. n., holotype; 3) A. platanegrachei sp. n., holotype; 4 – 5) A. thracicus sp. n., male holotype and female paratype; 6) A. yunakovi sp. n., holotype (Photos: Christoph Germann).

FIGURES 7 – 21. Figs 7 – 11, Amicromias cunevi sp. n.: 7 — head with rostrum, dorsal view. Scale = 0.50 mm; 8 — head with rostrum, lateral view. Scale as in dorsal view; 9 — pronotum and elytra, dorsal view. Scale = 1.00 mm; 10 — detail of elytral vestiture. Without scale; 11 — spermatheca. Scale = 0.25 mm. Figs 12 – 16, A. osellai sp. n.: 12 — head with rostrum, dorsal view. Scale = 0.50 mm; 13 — head with rostrum, lateral view. Scale as in dorsal view; 14 — pronotum and elytra, dorsal view. Scale = 1.00 mm; 15 — detail of elytral vestiture. Without scale; 16 — spermatheca. Scale = 0.25 mm. Figs 17 – 21, A. platanegrachei sp. n.: 17 — head with rostrum, dorsal view. Scale = 0.50 mm; 18 — head with rostrum, lateral view. Scale as in dorsal view; 19 — pronotum and elytra, dorsal view. Scale = 1.00 mm; 20 — detail of elytral vestiture. Without scale; 21 — spermatheca. Scale = 0.25 mm.