Bolitophila rohdendorfi, Greenwalt & Blagoderov, 2019

Greenwalt, Dale E. & Blagoderov, Vladimir A., 2019, Review of the fossil record of Bolitophilidae, with description of new taxa and discussion of position of Mangas Kovalev (Diptera: Sciaroidea), Zootaxa 4567 (3), pp. 546-560 : 548-552

Bolitophila rohdendorfi sp. nov.

( Figures 7 , 12.2)

urn:lsid:zoobank.org:act:AF0CFA8D-7F46-4A39-8CAC-3FEB29BE9DAD

Etymology. The specific epithet is a patronym for Prof. Boris Rohdendorf (1904–1977), Russian entomologist and palaeontologist.

Holotype. PIN 964 /1318; deposited in the Palaeontological Institute of Russian academy of Sciences ( PIN), Moscow, Russia.

Type Horizon and Locality. Baltic amber of unknown provenance (Late Eocene). The collection 964 was purchased by PIN in 1948.

Diagnosis. R 2+3 straight, ending in R 1; C ends far beyond tip of R 5; tb present, but very short. Stigma weak. Proctiger longer than gonocoxites; gonostyli tapering towards apex, with two sclerotized teeth.

Description. Measurements: body: 5.7 mm, wing: 5.1 mm (Figure 7.1). Head with brown face, wider than long, with triangular ventral membranous area above clypeus. Clypeus small, dark brown, triangular. Scape cylindrical as long as wide, pedicel spherical, slightly narrower than scape. Antennal pubescence long, hairs approximately 1.5x the width of flagellomeres; 6 th flagellomere about 10x longer than wide (Figure 7.2). Thorax uniformly brown; mesonotum with a narrow black longitudinal stripe in anterior part. Halteres slightly longer than thorax. Legs: t1/bt1 = 1:1.12, t2/bt2 = 1:0.78, t3/bt3 = 1:0.8. Tibial spurs about as long as tibia width at apex. Wings (Figure 7.4) hyaline, with weakly defined stigma at apex of R 1. Sc ending just beyond the base of Rs1, costa extending beyond R 5 halfway distance to M 1. R 2+3 almost straight, ending on C just distad of tip of R 1. Crossvein rm slightly shorter than M3 section. Crossvein tb (basal bart of M 3+4) present, short, transverse. Crossvein sc-r at the level of tb. R 5, M 1, M 2 and M 3+4 almost parallel. A 1 weakened at apex. Abdomen with tergite 9 very short, trapezoid, as wide as tergite 8; cerci large, round; proctiger longer than gonocoxites; gonostyli tapering, with two black distal teeth (Figure 7.3, 12.2).

Remarks. Bolitophila rohdendorfi sp. nov. differs from other species of the genus in the structure of genitalia: the combination of long proctiger and tapering gonostyli bearing two sclerotised teeth.

Figures

FIGURE 7. Bolitophila rohdendorfi sp. nov., holotype PIN 964/1318. 1. Habitus. 2. Head and thorax. 3. Male genitalia, dorsal view. 4. Wing. Scale bars equal 1.0 mm (1) and 0.2 mm (2), 0.5 mm (3) and 0.1 mm (4).