Fidiobia brevialis Popovici, Masner & Lahey, 2022

Popovici, Ovidiu Alin, Masner, Lubomir, Lahey, Zachary & Talamas, Elijah, 2022, Revision of the Palearctic species of Fidiobia Ashmead (Hymenoptera, Platygastroidea), Journal of Hymenoptera Research 92, pp. 23-144 : 23

2. Fidiobia brevialis Popovici, Masner & Lahey sp. nov.

Figs 43-47 , 299

Description.

Female. Body length: 0.8 mm. Colour of body: xanthic (Figs 43 , 44 ).

Head (Figs 45 , 46 ). Colour of head: brown. Sculpture of head: reticulate-coriaceous. Sculpture of occiput: transverse reticulate coriaceous. Ocellar prominence: absent. Preocellar depression: present. Paraocellar depressions: present. OOL / ocellar diameter: OOL around 2 times ocellar diameter. Orientation of lower half of inner orbits: visibly divergent. Sculpture of frons immediately anterior to ocellus: alutaceous. Sculpture of frons immediately dorsal to toruli: the same as the sculpture of the rest of frons, but more transverse. Epitorular carina: present. Distance between toruli: smaller than the transverse diameter of torulus. Setation of clypeus: two setae. Malar sulcus: absent. Antenna (Fig. 47 ). Colour of A1: yellow. Colour of clava: almost similar to rest of antenna. Number of antennomeres: nine. Shape of A1: more or less cylindrical. Ventral (inner) lamella on A1: present as a trace in the apical part of A1. Length of A3 of female: distinctly shorter than A2. Sensillar formula (A7:A8:A9): unknown.

Mesosoma (Figs 43 , 44 ). Colour of mesosoma: light-brown. Mesosoma: weakly compressed dorsoventrally. Pronotum in dorsal view: narrow, collarlike. Transverse pronotal sulcus: present as a narrow groove along anterior rim of pronotum. Posteroventral end of transverse pronotal sulcus: dilated. Lateral pronotal area: sculptured only on the dorsal third. Antero-admedian line: absent. Mesoscutum: weakly convex. Parapsidal lines: absent. Sculpture of internotaular area: absent. Notauli: absent. Shape of notauli: NA. Outer edge of notauli: NA. Orientation of inner edge of notauli: NA. Length of notauli: NA. Length of notaulus / maximum width of notaulus: NA. Distance between notauli: NA. Transscutal articulation: complete. Scuto-scutellar sulcus: present, complete. Fovea on scuto-scutellar sulcus: absent. Mesoscutellum: weakly convex. Shape of mesoscutellum: subrectangular. Axillular carina: posterior apex of axillular carinae touching the posterior edge of mesoscutellum. Axilloaxillular carina: present. Sculpture of mesoscutellum: absent. Posterior mesoscutellar sulcus: absent. Metascutellum: entirely visible. Metascutellar carina: present. Width of metasomal depression: greater than the length of lateral propodeal carina. Median carina between lateral propodeal carinae: absent. Transverse carina between lateral propodeal carinae: present. Foamy structure on transverse carina between lateral propodeal carinae: present. Foamy structure on metasomal depression: absent. Lateral propodeal carinae: parallel. Foamy structure on lateral propodeal carina: present on the entire carina. Plica: not visible. Posterior end of plica: NA. Foamy structure on plica: NA. Foamy structure on metapleural carina: present on the entire carina. Foamy structure on ventral metapleural area: present. Setation of dorsal metapleural area: sparse, long setae in 2-3 longitudinal rows. Setation of ventral metapleural area: dense, long setae on posteroventral half. Longitudinal striation on dorsal mesopleuron: present. Transepisternal line: absent. Mesopleural carina: present. Metapleural sulcus: present, incomplete. Wings: brachypterous. Apex of fore wing: rounded. Colour of fore wing: transparent. Transverse brown band on fore wing: absent. Submarginal vein in fore wing: present. Length of submarginal vein in fore wing: surpassing 1/3 the length of fore wing. Spectral veins on fore wing: absent. Marginal setae of fore wing: present, well visible. Disc of fore wing: with spinulose microtrichia. Legs: Colour of fore tibia: yellow. Colour of fore tarsus: yellow. Colour of middle femora: yellow. Colour of middle tibiae: yellow. Colour of middle tarsus: yellow. Colour of hind femora: yellow. Colour of hind tibiae: yellow. Colour of hind tarsus: yellow.

Metasoma (Figs 43 , 44 ): Posterior of T2 some or all tergites may be retracted under T2. Shape of T1: trapezoidal. Colour of T1: light brown. Lateral setae of T1: 2 pairs. Colour of T2: light brown. Shape of T2: longer than wide. Anterior pits of T2: distinctly separated. Sculpture of T2, lateral to anterior pits of T2: absent. Colour of T3-T5: the same as T2.

Male. unknown.

Etymology.

The species name is derived from Latin words " brevis " and " alis ", meaning "short wings".

Material examined.

2♀. Japan : Holotype 1♀, Hokkaido Tomuraushi area , 43.45°N, 142.91°E, 13.viii.1996, leg. Masner L. (SS) (CNCI) . Paratype: 1♀, Hokkaido, Sapporo Forest Reservation, 43.072°N, 141.202°E, 8.viii.1989, leg. Sharkey M. (SS) (CNCI) .

Distribution.

Japan (Fig. 299 ).

Biology.

unknown.

Diagnosis.

Fidiobia brevialis and F. sashai are the only Palearctic species of the genus that are brachypterous and lack notauli. These species can be separated by the length of the fore wings (hardly longer than the tegula in F. sashai and surpassing the middle of T2 in F. brevialis ) and the length of the transscutal articulation (incomplete in F. sashai and complete in F. brevialis ).

Figures

Figures 43 - 47. Fidiobia brevialis: 43 habitus, dorsal view (Holotype) 44 habitus, lateral view 45 head, dorsal view 46 head, frontal view 47 antenna (♀).

Figures 298 - 300. Geographical distribution of: 298 F. bohemica 299 F. brevialis 300 F. brevinotaula (Blue area-data from Veenakumari et al. 2018. Red area-our data).