Fidiobia polita Buhl 1998
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name: tnah 20
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Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Platygastridae
Fidiobia
Fidiobia polita

description: Fidiobia polita Buhl, 1998   
(Figures 5B, 8G, 10A, 11D, 12E)  
 Fidiobia polita Buhl, 1998 a: 298; Buhl, 1999b: 18.   
 Diagnosis   
Antenna nine-segmented; OOL equal to diameter of posterior ocellus; pronotum small, hardly visible in dorsal view; mesoscutum in anterolateral part imbricate, sculptured as the head; in posteromedian part, the sculpture is faint and mesoscutum almost smooth, shiny; notauli absent; T2 smooth, shiny, glabrous, without visible sculpture, with two large depressions anterolaterally; length of T2 0.8 times width.  
 Description   
Female: body size 0.6 mm. Colour: head, mesosoma, distal one-third of T2; T3; T4; T5 and T6 dark brown; T1 and proximal two-thirds of T2 brown. Antenna: A1–A6 yellow; A7–A9 light brown. Legs, including coxae, yellow.  
Head transverse, width 2.5 times length, as wide as mesosoma. Height of head in frontal view 0.9 times width. Vertex and occiput with very faint, barely perceptible imbricate sculpture. Temple sculptured as vertex. Compound eye large, glabrous. Width of eye twice width of temple. Eye height 1.5 times width of eye. OOL equal to diameter of posterior ocellus. POL 1.8 times LOL. Frons without frontal depression, sculptured as vertex and temple. Vertex and temple with short sparse silvery setae. Gena without malar sulcus and not striate, with similar sculpture as temple.  
Mandible bidentate; palpal formula unknown, but probably 1: 1.  
Antenna in females nine-segmented: length of A1 2.9 times width and 2.4 times length of A2. Length of A2 1.5 times width and three times length of A3. A3, A4 and A5 of approximately equal length and width. Width of A3 1.2 times length. A6 transverse, width of A6 1.8 times length and 1.4 times width of A5. Length of A7 2 times length of A6 and 1.1 times length of A8. Width of A7 1.8 times length, twice width of A6 and as wide as A8. Length of A9 1.1 times width and 1.7 times length of A8.  
Mesosoma as long as wide; width of mesosoma 1.4 times height.  
Pronotum small, hardly visible in dorsal view. Mesoscutum in anterolateral part imbricate, sculptured as head; in posteromedian part the sculpture faint and mesoscutum almost smooth, shiny; length of mesoscutum 1.6 times length of scutellum. Notauli absent. Width of scutellum twice length, strongly flattened, without lateral keels, smooth and shiny.  
Length of forewing 3.1 times width, 1.1 times length of hindwing, three times width of mesosoma, surpassing apex of metasoma. Forewings with submarginal vein ending in rounded knob. Length of forewings 4.8 times length of submarginal vein. Width of forewing 6.1 times length of marginal fringe at its longest.  
Hindwing seven times as long as wide, with two hamuli. Width of hindwing 1.7 times length of marginal fringe at its longest. Base of hindwing with a short trace of a nebulous submarginal vein.  
Metascutellum weakly defined, hardly visible in dorsal view. Propodeum medially with two short parallel keels, covered with a sparse, short, silvery pilosity.  
Pronotal groove superficial, shiny, glabrous. Side of pronotum in dorsal part sculptured as mesoscutum, glabrous. Mesopleuron smooth with a shallow mesopleural depression and without ridge below tegula. Sternaulus small, shiny. Metapleuron with short silvery setae, especially in posterior part; anteromedially with a large glabrous area.  
Metasoma: length 1.4 times length of mesosoma, 1.4 times width; composed of six externally visible terga. Some of the last four tergites may be telescoped under large T2.  
T1 convex, with distinct medial prominence, lustrous, width 2.5 times length, laterally of medial prominence with two depressions. Ratio between maximum and minimum width of T1 1.7.  
T2 smooth, shiny, glabrous, without visible sculpture, with two large depressions anterolaterally; length of T2 three times length of T1 and 0.8 times its own width. Ratio between maximum and minimum width of T2 1.5.  
 Hosts Unknown.   
 Distribution   
Palaearctic: Sweden (Buhl 1998).  
 Material examined   
 Sweden: Holotype female of Fidiobia polita Buhl, 17 July 1987 Sm., Rörvik, (leg. P.N. Buhl) (ZMUC); seven females. SÖ, Tyresta Nature Reserve, Haningealpen, Malaise trap in big 1999 fire site (NHRS); Romania: one female 20 May 2006 Ciric (47°14′35.99′′ N, 27°34′45.37′′ E), leg. O. Popovici and I. Moglan (sweep net).   
 Remarks   
 The specimen from Romania corresponds well with the holotype, being almost identical; there is some difference with regard to metasoma (extruded in the Romanian specimen and telescoped in the holotype). This species differs from all European species of Fidiobia with nine-segmented antennae, except F. synergorum, in lacking distinct notauli. Fidiobia polita differs from F. synergorum in having the mesosoma normally developed and not strongly flattened.   
 New record for Romania.
description: Published as part of 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), pp. 1131-1164 in Journal of Natural History 44 (19 - 20) on pages 1154-1155, DOI: 10.1080/00222931003632740, http://zenodo.org/record/5209151