Fidiobia rugosifronsoides Popovici, Lahey & Talamas, 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

22. Fidiobia rugosifronsoides Popovici, Lahey & Talamas sp. nov.

Figs 215-222 , 288 , 289 , 319

Description.

Female. Body length: 0.9-1.0 mm. Colour of body (Figs 215 , 216 ): bicoloured, head and mesosoma black to dark brown, metasoma brown with T1 and sometimes the proximal half of T2 lighter, almost pale in the Asian material.

Head (Figs 217 , 218 , 221 ). Colour of head: black. Sculpture of head: areolate rugulose. Sculpture of occiput: areolate rugulose. Ocellar prominence: absent. Preocellar depression: absent. Paraocellar depressions: absent. OOL / ocellar diameter: OOL equal with ocellar diameter. Orientation of lower half of inner orbits: visibly divergent. Sculpture of frons immediately anterior to ocellus: areolate rugulose. Sculpture of frons immediately dorsal to toruli: areolate rugulose. Epitorular carina: present. Distance between toruli: smaller than the transverse diameter of torulus. Setation of clypeus: two setae. Malar sulcus: absent. Antenna (Fig. 219 ). Colour of A1: light brown. Colour of clava: striking different from the rest of antenna (clava brown, rest of antenna yellow). 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): 2:2:1.

Mesosoma (Figs 220 , 221 ). Colour of mesosoma: black. Mesosoma: weakly compressed dorsoventrally. Pronotum in dorsal view: present mostly as lateral shoulders. Transverse pronotal sulcus: present as a narrow groove along anterior rim of pronotum. Posteroventral end of transverse pronotal sulcus: not dilated. Lateral pronotal area: sculptured only on the dorsal half. Antero-admedian line: present. Mesoscutum: weakly convex. Parapsidal lines: absent. Sculpture of internotaular area: absent in posterior half, reticulate coriaceous anteriorly. Notauli: present, incised. Shape of notauli: dilated posteriorly and acute anteriorly. Outer edge of notauli: medial to axillular carina. Orientation of inner edge of notauli: converging posteriorly. Length of notauli: half of length of mesoscutum, measured along midline. Length of notaulus / maximum width of notaulus: 2.0-2.9 times as long as wide. Distance between notauli: greater than the broadest part of notaulus. Transscutal articulation: complete. Scuto-scutellar sulcus: absent. Fovea on scuto-scutellar sulcus: NA. 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: not visible, covered by mesoscutellum. Metascutellar carina: absent. Width of metasomal depression: the same with 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 only on the posterior half. Plica: visible. Posterior end of plica: fused with metapleural carina. Foamy structure on plica: present, fused with foamy structure from metapleural carinae. Foamy structure on metapleural carina: present on the entire carina. Foamy structure on ventral metapleural area: present. Setation of dorsal metapleural area: dense, long setae on posterodorsal half. Setation of ventral metapleural area: dense, long setae on posteroventral half. Longitudinal striation on dorsal mesopleuron: present. Transepisternal line: visible as a ridge on the anteroventral mesopleuron connected with a pit. Mesopleural carina: present. Metapleural sulcus: absent. Wings (Fig. 222a, b ): macropterous. Apex of fore wing: rounded. Colour of fore wing: infuscate. Transverse brown band on fore wing: absent. Submarginal vein in fore wing: present. Length of submarginal vein in fore wing: not surpassing basal 1/4 the length of fore wing. Spectral veins on fore wing: absent. Marginal setae of fore wing: faintly indicated. Disc of fore wing: with spinulose microtrichia. Legs. Colour of fore tibia: light brown. Colour of fore tarsus: light brown. Colour of middle femora: light brown. Colour of middle tibiae: light brown. Colour of middle tarsus: light brown. Colour of hind femora: light brown. Colour of hind tibiae: light brown. Colour of hind tarsus: light brown.

Metasoma (Figs 215 , 216 ): Tergites posterior of T2 may be retracted under T2. Shape of T1: trapezoidal. Colour of T1: brown. Lateral setae of T1: 3 pairs. Colour of T2: 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.

This species is named for its similarity to F. rugosifrons .

Material examined.

8♀. Finland: Holotype 1♀, Lkor , Sodankylä, Jeesiö, Nurmiharju, 67.508°N, 26.035°E, 11-18.vii.2014, leg. Flinck J. and Aaltio J. (MT) (OOPC0042).

Paratypes: Estonia: 1♀, 1.5 km NE Sööru, 58.66111°N, 26.88531°E, 4-11.vii.2011, leg. Soon V. (SN) (OPPC0593) ; 2♀, 1.5 km NE Sööru, 58.66111°N, 26.88531°E, 21.vii-13.viii.2011, leg. Soon V. (SN) (OPPC0681, 0652) .

Finland: 1♀, Lkor , Sodankylä, Jeesiö, Nurmiharju, 67.508°N, 26.035°E, 11-18.vii.2014, leg. Flinck J. and Aaltio J. (MT) (OOPC0041) ; 1♀, Lkor , Sodankylä, Jeesiö, Nurmiharju, 67.508°N, 26.035°E, 18-25.vii.2014, leg. Flinck J. and Aaltio J. (MT) (OOPC0040) .

Sweden: 1♀, Småland, Asa , 57.16667°N, 14.78333°E, 6.vi.2007, leg. Shevtsova E. (OPPC0731) ; 1♀, Skåne, Häckeberga, 55.58333°N, 13.41667°E, 5.vii.2006, leg. Hansson C. and Shevtsova E. (OPPC0730) .

Non-type material.

China: 1♀, Beijing Prov. Mentougo, 39.987°N, 115.5246°E, 28.vii.2002, leg. Melika G. (CNCI).

South Korea: 8♀, Gangwon-do, Chuncheon Nam-myeon, Magog-li, Hongchen river, 37.72977°N, 127.5765°E, 7.viii-14.ix.2004, leg. Tripotin P. (MT) (OPPC0764, 0741, 0723, 0781, 0749, 0640, 0828, 0487); 1♀, Chungnam, Daejeon-si, Wadong, 36.3601°N, 127.2345°E, 24.iv.-20.v.2007, leg. Tripotin P. (MT) (OPPC0654); 3♀, Chungnam, Daejeon-si, Wadong, 36.3601°N, 127.2345°E, 19.vi-24.vii.2007, leg. Tripotin P. (MT) (OPPC0049, 0050, 0004).

Distribution.

Estonia, Finland, Sweden, China, South Korea (Fig. 319 ).

Biology.

unknown.

Diagnosis.

Fidiobia rugosifronsoides is close to F. rugosifrons . The main differences between these two species consist of the sculpture of the area between the notauli (smooth in the posterior half in F. rugosifronsoides and totally sculptured in F. rugosifrons ), in the ratio of A3 to A4 (A3 1.2 times as long as A4 in F. rugosifronsoides and A3 1.5 times as long as A4 in Fidiobia rugosifrons ) and in the sculpture of the lateral pronotal area (entirely sculptured in F. rugosifrons and sculptured only in the dorsal half in F. rugosifronsoides ).

Comments.

In our material we found this species in Europe in Estonia (here, it is sympatric with F. rugosifrons ), Finland and Sweden and in Asia in China and South Korea. Striation below the tegula and longitudinal sculpture below the mesofemoral depression are more evident in specimens from Europe than in the Asian material; the striae of T1 are longer and coarser in the European material; T1 and sometimes the proximal half of T2 is lighter, almost pale in the Asian material and brown in the European material; notauli are broader, and the distance between the medial margin of the notaulus near the transscutal articulation is greater in the European material than in the Asian material.

Figures

Figures 215 - 222. Fidiobia rugosifronsoides: 215 habitus, dorsal view (OPPC 0681) 216 habitus, lateral view (OPPC 0593) 217 head, dorsal view 218 head, frontal view 219 antenna (♀) (OPPC 0040) 220 mesosoma, dorsal view 221 mesosoma, lateral view 222 a wings (OPPC 0040) 222 b WIP.

Figures 282 - 289. SEM of Fidiobia spp.: 282 F. striatitergitis 283 F. vladlubomiri 284 F. pronotata 285 F. roatai 286, 287 F. rugosifrons 288 F. flaviabdominalis 289 F. rugosifronsoides.

Figures 319 - 321. Geographical distribution of: 319 F. rugosifronsoides 320 F. sashai 321 F. striatitergitis (Blue area-data from Szabo 1962. Red area-our data).