Fidiobia striatitergitis ( Szabo , 1962)

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

24. Fidiobia striatitergitis ( Szabo, 1962)

Figs 9 , 10 , 13 , 16 , 19 , 21 , 25 , 29 , 30 , 33 , 36 , 228-234 , 235-240 , 282 , 321

Isolia striatitergitis Szabó, 1962: 239; Kozlov 1971: 61; Kozlov 1978: 657; Alekseyev 1979: 764; Kozlov 1987: 1200; Masner and Huggert 1989: 79; Vlug 1995: 34.

Fidiobia gordoni Popovici and Buhl 2010: 1137.

Fidiobia striatitergitis : Kamalanathan et al. 2019: 471, 472 (type information, generic transfer)

Description.

Females (Figs 228 , 229 ). Length of body: 1.1-1.3 mm. Colour of body: bicoloured, head and mesosoma dark brown, T1 light brown, T2-T5 brown, T6 brown becoming lighter brown at apex (Fig. 228 ).

Head (Figs 230 , 231 , 233 , 235 , 236 ). Colour of head: dark brown. Sculpture of head: reticulate rugose. Sculpture of occiput: reticulate rugose. Ocellar prominence: present. Preocellar depression: present. Paraocellar depressions: absent. OOL / ocellar diameter: OOL around 3 times ocellar diameter. Orientation of lower half of inner orbits: visibly convergent. Sculpture of frons immediately anterior to ocellus: reticulate rugose. Sculpture of frons immediately dorsal to toruli: the same as the sculpture on the rest of frons. Epitorular carina: absent. Distance between toruli: equal to the transverse diameter of torulus. Setation of clypeus: six setae. Malar sulcus: absent. Antenna (Figs 232 , 237 , 238 ). Colour of A1: brown. Colour of clava: the same as the color of scapus. Number of antennomeres: ten. 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 (A8:A9:A10): 2:2:1 (Figs 232b , 238 ).

Mesosoma (Figs 228 , 233 , 239 , 240 ). Colour of mesosoma: dark brown. Mesosoma: weakly compressed dorsoventrally. Pronotum in dorsal view: large, collarlike. Transverse pronotal sulcus: present. Posteroventral end of transverse pronotal sulcus: dilated. Lateral pronotal area: entirely sculptured. Antero-admedian line: absent. Mesoscutum: weakly convex. Parapsidal lines: present. Sculpture of internotaular area: smooth, almost absent at least in posterior half, reticulate coriaceous anteriorly. Notauli: present, incised. Shape of notauli: dilated posteriorly and rounded anteriorly. Outer edge of notauli: medial to axillular carina. Orientation of inner edge of notauli: not converging posteriorly. Length of notauli: at most 0.3 times as long as length of mesoscutellum, measured along midline. Length of notaulus / maximum width of notaulus: 3-4 times as long as wide. Distance between notauli: greater than the broadest part of notaulus. Transscutal articulation: complete. Scuto-scutellar sulcus: present, complete. Fovea on scuto-scutellar sulcus: present laterally. Mesoscutellum: weakly convex. Shape of mesoscutellum: semicircular. Axillular carina: posterior apex of axillular carinae not abutting posterior edge of mesoscutellum. Axilloaxillular carina: absent. Sculpture of mesoscutellum: reticulate rugose to longitudinally strigose. Posterior mesoscutellar sulcus: present. Metascutellum: not visible, covered by mesoscutellum. Metascutellar carina: present. Width of metasomal depression: greater than the length of lateral propodeal carina. Median carina between lateral propodeal carinae: present. Transverse carina between lateral propodeal carinae: absent. Foamy structure on transverse carina between lateral propodeal carinae: absent. Foamy structure on metasomal depression: absent. Lateral propodeal carinae: parallel. Foamy structure on lateral propodeal carina: present only on the posterior half of the vertical part. Plica: visible. Posterior end of plica: free, converging with lateral propodeal carina. Foamy structure on plica: present, as a single flange. Foamy structure on metapleural carina: present, only posteriorly. Foamy structure on ventral metapleural area: absent. Setation of dorsal metapleural area: sparse, long setae in 3-4 longitudinal rows. Setation of ventral metapleural area: rare, long setae on the entire surface, uniformly distributed. Longitudinal striation on dorsal mesopleuron: present. Transepisternal line: present, visible as a ridge originated in the anteroventral mesopleuron, curving dorsally at anterior end. Mesopleural carina: absent. Metapleural sulcus: absent. Wings (Fig. 234a, 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: surpassing 1/3 the length of fore wing. Spectral veins on fore wing: present (medial - M+Cu). Marginal setae of fore wing: absent. Disc of fore wing: with spinulose microtrichia. Legs. Colour of fore tibia: light brown. Colour of fore tarsus: light brown. Colour of middle femora: brown. Colour of middle tibiae: light brown. Colour of middle tarsus: light brown. Colour of hind femora: brown. Colour of hind tibiae: light brown. Colour of hind tarsus: light brown.

Metasoma (Figs 36a, b , 228 ): Tergites posterior of T2 exposed and clearly visible. Shape of T1: subrectangular. Colour of T1: reddish-brown. Lateral setae of T1: absent. Colour of T2: brown. Shape of T2: transverse or at most as long as wide. Anterior pits of T2: distinctly separated (Fig. 36a ). Sculpture of T2, lateral to anterior pits of T2: strigose on /most the length of T2. Colour of T3-T6: T3-T5 the same as T2, apex of T6 lighter.

Male. We did not study the male of this species, the only known male being the type of this species described under the name of Isolia striatitergitis Szabó. High quality photos of the male are presented in Veenakumari et al. (2019). It is similar to the female, except the antenna is almost filiform.

Material examined.

12♀. Greece: Paratypes of F. gordoni Popovici & Buhl, 2010 : 3♀, Kerkini Lake Nat. Park , Bistritza river, marsh, 41.3783°N, 23.3663°E, alt. 80 m, 21.vi.2008, leg. Popovici O., Fusu L. and Ramel G. (YPT), (OPPC) ; 2♀, Kerkini Lake Nat. Park , Lithotopos, Ecotourism site, 41.3043°N, 23.217°E, 19.vi.2008, leg. Popovici O. and Fusu L. (SN) (OPPC) .

Non-type material.

1♀, Neo Petritsi, 41.3138°N, 23.2765°E, 30.vi-6.vii.2008, leg. Ramel G. (MT) (OPPC 0581); 1♀, Kerkini Lake Nat. Park, Procom site, 41.3772°N, 23.3663°E, 19-25.ix.2007, leg. Ramel G. (MT) (OPPC 0704); 1♀, Kerkini Lake Nat. Park, Procom site, 41.3772°N, 23.3663°E, 23-29.v.2007, leg. Ramel G. (MT) (OPPC 0705); 1♀, Kerkini Lake Nat. Park, Procom site, 41.3772°N, 23.3663°E, 27.vi-3.vii.2007, leg. Ramel G. (MT) (OPPC 0724); 1♀, Kerkini Lake Nat. Park, near Neo Petritsi, 41.3138°N, 23.2765°E, 16-22.vi.2008, leg. Ramel G. (MT) (OPPC 0710); 2♀, Kerkini Lake Nat. Park, Pumping station site, 41.2135°N, 23.1033°E, 23-29.v.2007, leg. Ramel G. (MT) (OPPC 0709, OPPC 0725).

Distribution.

Hungary ( Szabó 1962), Greece (Fig. 321 ).

Biology.

The host is unknown. Based on the collection data, this species prefers wet habitats with lush vegetation beside rivers.

Diagnosis.

Fidiobia striatitergis may be recognized by the reticulate-rugose mesoscutellar disc, strigose T2, metapleural carina posterodorsally prolonged into a strong tooth, lateral propodeal carina and metasomal depression with no foamy structures.

Comments.

Fidiobia striatitergitis was originally described in Isolia Förster based on a single male specimen ( Szabó 1962). Veenakumari et al. (2019) transferred Isolia striatitergitis to Fidiobia . Popovici and Buhl (2010) described this species as F. gordoni , which we here recognize as a junior synonym of F. striatitergitis . Although Szabó’s material is represented by a single male and the material of Popovici and Buhl (2010) consists only of females, the main apomorphies of this species (reticulate-rugose mesoscutellar disc, substrigulate T2, metapleural carina posterodorsally prolonged into a strong tooth, lateral propodeal carina and metasomal depression with no foamy structure) are not sexually dimorphic. Therefore, we have confidence that these specimens are conspecific.

Figures

Figures 1 - 14. Morphological structures: 1 F. gallica 2 F. communis 3 Fidiobia sp. 4 F. tripotini 5 F. nipponica 6, 14 F. roatai 7 F. pronotata 8, 11 F. hofferi 9, 10, 13 F. striatitergitis 12 F. rugosifrons.

Figures 15 - 29. Morphological structures: 15, 17 F. nipponica 16, 19, 21, 25, 29 F. striatitergitis 18, 22 F. roatai 20, 27 F. hofferi 23, 28 F. synergorum 24 F. gallica 26 F. communis.

Figures 30 - 37. Morphological structures: 30, 33, 36 F. striatitergitis 31 F. nipponica 32, 34 F. vladlubomiri 35 F. flaviabdominalis 37 Fidiobia sp.

Figures 228 - 234. Fidiobia striatitergitis: 228 habitus, dorsal view (OPPC 0710) 229 habitus, lateral view 230 head, frontal view 231 head, dorsal view 232 a antenna 232 b sensillar formula 233 head and mesosoma, lateral view 234 a wings (OPPC 0725) 234 b WIP.

Figures 235 - 240. Fidiobia striatitergitis (SEM): 235 head, frontal view 236 head, lateral view 237 antenna (♀) 238 papillary sensillum 239 mesosoma, dorsal view 240 mesosoma, lateral view.

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).