Fidiobia gordoni, details & authors & information & http & www.tandfonline.com & loi & tnah20, 2010

details, Publication, authors, including instructions for, information, subscription, http, www. tandfonline. com, loi & tnah 20, 2010, The West Palaearctic species of Fidiobia Ashmead, 1894 (Hymenoptera: Platygastroidea), Journal of Natural History 44 (19 - 20), pp. 1131-1164 : 1137-1148

Fidiobia gordoni sp. nov. female

( Figures 3 , 4a , 8a , 9a , 11a , 12a )

Diagnosis

OOL 3–4.1 (3.5 ± 0.48, n = 8) times length of diameter of posterior ocellus; antenna 10-segmented; mesoscutum with notauli; notauli incomplete, abbreviated anteriorly, gradually dilated posteriorly; metasoma with six visible terga which are not telescoped; T2, the largest tergum, covered with a substrigulate sculpture on four-fifths of its surface, with two large depressions anterolaterally; median surface between these two depressions is smooth, lustrous.

Description

Female. Body size: 1.1–1.3 mm (1.2 ± 0.04, n = 8). Colour: body black; first metasomal terga brown; apex of metasoma light brown. Antenna: A1 and A8–A10 dark-brown with red tint; A2–A7 light brown. Vein of forewings brown. Legs with dark coxae, light brown trochanters and tibiae, brown femora and yellow tarsi.

Head transverse, width 2–2.4 (2.2 ± 0.1, n = 8) times length, 0.88–1 (0.96 ± 0.03, n = 8) times width of mesosoma. Head height 1.5 times width. Vertex, occiput, temple, frons and gena with areolate–rugulose sculpture. Compound eye large, glabrous. Eye width 0.8–1.2 (1 ± 0.1, n = 8) times temple width. Eye height 1.5–1.6 (1.5 ± 0.03, n = 8) times width of eye. OOL 3–4.1 (3.5 ± 0.48, n = 8) times length of diameter of posterior ocellus. POL 1.5–2 (1.85 ± 0.2, n = 8) times LOL. Frons convex, without frontal depression. Equidistant, between anterior ocellus and toruli, is a preocellar pit. Head with adpressed, short, scattered, silvery setae. Gena without malar sulcus and not striate. Mandible bidentate; palpal formula 1: 1 ( Figure 3 ).

Antenna 10-segmented. Length of A1 3.4 times width, 3.4 times length of A2. Length of A2 1.7 times width and 2.5 times length of A3. A3 of equal length and width, 2.0 times length of A4 and 1.5 times length of A5. A4 transverse, width of A4 2.3 times length, similar to width of A5 and 1.2 times width of A3. Length of A5 2.0 times length of A6. A6 transverse, width of A6 4.5 times length. A7 as long and as wide as A6. Width of A8 1.25 times length and of equal width as A9. Length of A8 6 times length of A7 and 1.1 length to A9. Length of A10 1.4 times width and 1.7 times length of A9.

Mesosoma: length 1.0–1.1 (1 ± 0.03, n = 8) times width. Width of mesosoma 1.6 times height. Pronotum small, hardly visible in dorsal view. Mesoscutum with areolate–rugulose sculpture, covered with short and scattered setae, sculptured as the head, almost smooth between notauli, 1.85–2.1 (2 ± 0.09, n = 8) times as long as scutellum. Notauli incomplete, abbreviate anteriorly, gradually dilated posteriorly.

Width of scutellum 2–2.1 (2 ± 0.07, n = 8) times length, strongly flattened, without lateral keels, smooth and shining in anteromedial part, remainder sculptured as mesoscutum.

Forewing covered with dense, short microtrichia. Length of forewing 2.2–2.4 (2.3 ± 0.06, n = 8) times width, 1.2 times length of hindwing, 2.3–2.6 (2.4 ± 0.09) times width of mesosoma, surpassing apex of metasoma. Forewings with submarginal vein ending in a rounded knob and with nebulous medial, cubital, anal and basal veins. Length of submarginal vein one-third length of forewing.

Hindwing 4.6 times as long as wide, with two hamuli and with complete nebulous submarginal vein. Marginal fringe well developed in basal half of hindwings.

Metascutellum weakly defined, hardly visible in dorsal view. Propodeum medially with two short parallel keels, covered with a short, silvery pilosity.

Pronotal groove deep and glabrous; epicnemium reduced to a triangular rudiment, above and behind anterior coxae. Side of pronotum sculptured as mesoscutum, glabrous. Mesopleuron with a large, deep depression, smooth and shining anteriorly and ventrally, dorsally and posteriorly, with parallel ridges below tegula. Sternaulus well developed, sculptured as side of pronotum.

Metapleuron in lower part sculptured as sternaulus, in upper part smooth. Dorsal sides of metapleuron produced laterally in a tooth-like structure.

Metasoma: length 1.6–1.8 (1.7 ± 0.05, n = 8) times length of mesosoma, 1.75–2 (1.9 ± 0.09, n = 8) times width; composed of six externally visible tergites. It seems that the last terga cannot be telescoped under T2.

T1 convex, with distinct median prominence with coarse, longitudinal ridges, width 3.6–4.75 (4.26 ± 0.4, n = 8) times length. In anterolateral corners there are two depressions. Ratio between maximum and minimum width of T1 1.2–1.4 (1.27 ± 0.07, n = 8).

T2, the largest tergum, covered with a substrigulate sculpture on four-fifths of its surface, with two large depressions anterolaterally; median surface between these two depression smooth, shiny. Length of T2, 4.2–5.7 (5.2 ± 0.6, n = 8) times the length of T1 and 0.87–1 (0.95 ± 0.04, n = 8) its own width. Ratio between maximum and minimum width of T2 1.2–1.3 (1.27 ± 0.04, n = 8). Remaining terga are smooth; T3, T4 and T6 of almost equal length. T6 triangular, almost twice as long as T5.

Hosts

Unknown.

Distribution

Greece.

Material examined

Greece: Holotype female, Kerkini Lake National Park ., 21 June 2008, Bistritza River, marsh, 41°22′42′′ N, 23°21′59′′ E, altitude 80 m ( YPT), leg. O. Popovici, L. Fusu and G. Ramel ; Paratypes: four females, same data as holotype ; three females, Kerkini Lake National Park ., 19 June 2008, Lithotopos, 41°18′15.6′′ N, 23°13′01.2′′ E ( YPT), leg. O. Popovici and Fusu ; 1 female, Kerkini Lake National Park ., 22 June 2008, Promahonas, maquis shrubland, 41°22′25.32′′ N, 23°22′18.84′′ E, altitude 60 m, leg. O. Popovici and L. Fusu.

Holotype: deposited in BMNH; one paratype in ZMUC, in Buhl’s collection; one paratype in CNCI; six paratypes in OPPC.

Etymology

Named in honour of Mr Gordon Ramel, a keen entomologist who helped the senior author with his collecting trip in Greece.

Remarks

This species is similar to F. hispanica because of its 10-segmented antennae, but its distinct habitus, size of body, sculpture of head, mesoscutum and T2, and presence of notauli, make it very distinct. Longitudinal costae of T1, sculpture of T2 and ratio OOL/POL, forewing with long tubular submarginal vein show the affinities of this species to the genus Neobia Masner and Huggert , but in Neobia female antenna is nine-segmented and not 10-segmented as in F. gordoni . Because the precise limits of Fidiobia are unknown and the relationship between Fidiobia and Neobia is uncertain, we choose to describe gordoni in Fidiobia in spite of its affinities with Neobia .

Figures

Figure 3. Maxillo-labial complex of Fidiobia gordoni; scale bar 0.1 mm.

Figure 4. Habitus in (A) Fidiobia gordoni; (B) Fidiobia hispanica, scale bars 0.1 mm.

Figure 8. Antenna: (A) Fidiobia gordoni female; (B) Fidiobia hispanica female; (C) F. hispanica male; (D) Fidiobia synergorum female; (E) F. synergorum female, teratological case; (F) F. synergorum male; (G) Fidiobia polita female; (H) Fidiobia pronotata female; (I) Fidiobia rugosifrons female; (J) F. rugosifrons male; (K) Fidiobia hofferi female, scale bars 0.1 mm.

Figure 9. Forewing: (A) Fidiobia gordoni; (B) Fidiobia hispanica; (C) Fidiobia synergorum female; (D) F. synergorum male, scale bars 0.1 mm.

Figure 11. Veins of forewing – detail: (A) Fidiobia gordoni; (B) Fidiobia hispanica; (C) Fidiobia synergorum; (D) Fidiobia polita; (E) Fidiobia rugosifrons; (F) Fidiobia hofferi, scale bars 0.1 mm.

Figure 12. Hindwing in: (A) Fidiobia gordoni; (B) Fidiobia hispanica; (C) Fidiobia synergorum female; (D) F. synergorum male; (E) Fidiobia polita; (F) Fidiobia rugosifrons; (G) Fidiobia hofferi, scale bars 0.1 mm.