Cinetus elongatus sp. nov.

urn:lsid:zoobank.org:act: A7DAC194-D7C5-41B4-B925-6BE4250CB42C

Figs 1C, 3A–C, Table 1

Diagnosis

Scape longer than head length, F1 longest flagellomere, deeply emarginated on anterior half, wider at apex of emargination (male; Fig. 3A–B); metapleural carina extending from hind coxa and forked anteriorly (Fig. 3C); marginal vein slightly shorter than its distance from basal vein, radial cell elongate, longer than marginal vein, postmarginal vein 1.5 times as long as radial cell (Fig. 1C); petiole 5.3 times as long as wide, with a few long setae (Fig. 3C).

Etymology

The species name derives from the general elongate aspect of the species. The specific epithet is to be treated as an adjective.

Type material

Holotype NHMD-608402, a complete male but partially hidden by a milky coat.

Locality and horizon

Baltic amber is considered to be of Bartonian–Priabonian age, ca 34–38 Ma.

Description

Male

BODY. 4.46 mm. Head higher than long, homogeneously pubescent (HeL = 0.54 mm); eye oval; antenna inserted on distinct shelf; toruli broadly separated; antenna with numerous short hairs; scape longer than head length; pedicel more than two times as short as shortest flagellomere, almost as wide as long; flagellomeres cylindrical, elongate, much longer than wide; F1 longest, with deep emargination basally, wider at apex of emargination; F2–F11 shorter, slightly decreasing in length; F12 longer than F7–F11, conical (antennomeres length of holotype, in mm: Sc-0.61; P-0.12; F1-0.41; F2-0.38; F3-0.36; F4-0.34; F5-0.35; F6-0.33; F7-0.31; F8-0.32; F9-0.29; F10-0.29; F11-0.26; F12-0.33); mandibles of ordinary form, bidentate, slightly crossing at tip.

MESOSOMA. Pubescent, with short setae (MsL = 1.52 mm); pronotum reduced in length, epomia present; mesoscutum large, convex, notauli complete, convergent anteriorly, slightly diverging posteriorly but terminating in anterior scutellar pit; anterior scutellar pit deep, large, suboval with posterior margin convex; metapleural carina distinct, forked anteriorly; propodeum with plicae, median propodeal keel simple. Fore wing extending beyond metasoma, homogeneously micro-pubescent (FwL = 3.89 mm); C, Sc+R, basal vein, M+Cu, M, Cu, marginal vein, postmarginal vein, r-rs and Rs fully pigmented; marginal vein slightly shorter than its distance from basal vein; r-rs well developed; Rs closing radial cell in straight line; radial cell elongate, longer than marginal vein; postmarginal vein 1.5 times as long as radial cell. Hind wing shorter and narrower than fore wing; C pigmented; basal cell opened; three hamuli present. Legs slender, bearing numerous un-organized setae; tibial spur formula 1-2-2; tarsal claws simple.

METASOMA. Petiole 5.3 times as long as wide (PtL = 0.79 mm; PtW = 0.15 mm), longitudinally ribbed, with sparse very long setae; gaster ellipsoidal (GL = 1.61 mm; GH = 0.68 mm), pointed at apex, with sparse setae on first segments, more numerous at apex; T2 and S2 longest; four ring-like segments posterior to large tergite, genitalia externalized.

Female

Unknown.

Comments

Using Nixon’s (1957) key, Cinetus elongatus sp. nov. keys out near Leptorhaptus Förster, 1865 sensu Nixon (1957) because of the following characters: fourth antennal segment not modified, mandibles of ordinary form, scutellum without a row of foveae along posterior margin, marginal vein hardly shorter than the radial cell, petiole much longer than wide, notauli subparallel, terminates in scutellar hollow. Leptorhaptus is currently regarded as a synonym of Cinetus (Masner 1964). Cinetus elongatus displays all the diagnostic characters of Cinetus provided by Quadros & Brandão (2017), especially the large anterior scutellar pit, the posterior extremity of notauli directed toward a point within the anterior scutellar pit, the marginal vein shorter than radial cell and slightly shorter than its distance to basal vein.

Among the Baltic amber species, it differs from other Cinetus species as follow: C. balticus has the scape as long as F1 (longer in Cinetus elongatus sp. nov.), the petiole shorter (ratio length/middle height: 4 vs 5.3) and the marginal vein longer than its distance from basal vein; Cinetus breviscapus sp. nov. has the scape shorter than F1, the petiole shorter (ratio length/middle height: 2.8), the marginal vein longer than its distance from basal vein and the postmarginal vein shorter than radial cell; C. inclusus has a shorter petiole (ratio length/middle height: 1.5) and a smaller body (1.9 mm).