Agromyza elladanensis, Černý, 2011

Černý, Miloš, 2011, Agromyzidae (Diptera) in the vicinity of the Kerkini Lake with descriptions of eight new species from Greece, Acta Entomologica Musei Nationalis Pragae 51 (1), pp. 299-347 : 304-307

Agromyza elladanensis sp. nov.

( Figs. 1–3 , 7–14 )

Type locality. Greece, Macedonia, Serron, Krousia Mts., 41°11′32.4′′N 23°03′59.5′′E, 190 m a.s.l.

Type material. HOLOTYPE: J, ‘ Greece: 2007 / 41.11.32,4N 23.03.59,5E / Krousia Mts. , 20.-26.vii. / G. Ramel leg., 190 m, MT // Project Kerkini / the biodiversity study of / Wetland Kerkini / G. Ramel leg. // Agromyza elladanensis sp. nov. / det. M. Černý 2010 // Holotype’ ( NMPC). Loc. No. 9. Terminalia dissected, mounted on the same pin (medium: glycerine and gum resin).

PARATYPE: J, ‘ Greece: Kerkini 2007 / 41.11.32,4N 23.03.59,5E / Krousia Mts., 13.-19.vi.07 / G. Ramel leg., 190 m // Project Kerkini / the biodiversity study of / Wetland Kerkini / G. Ramel leg. // Agromyza elladanensis sp. nov. / det. M. Černý 2010 // Paratype’ ( MCHC), Loc. No. 9. Terminalia dissected, mounted on the same pin (medium: glycerine and gum resin).

Description (male, holotype). Head black, frontal vitta blackish brown, matt, ochre near lunule; ocellar triangle brownish black and fronto-orbital plate blackish brown, shining, gena brown, antennal cavities blackish brown, shining, mouth margin yellow. Antenna brown, pedicel and scape pale ochre brown, palpi blackish brown. Thorax dark, scutum black shining, scutellum blackish brown. Postpronotal lobe and notopleuron ochre brown, anepisternum blackish brown, only narrowly bordered with yellow along upper and hind margin. Wing hyaline, with yellowish white base, veins ochre yellow. Calypters white, their margin and fringe yellowish white. Knob of halteres white, stem yellowish white basally. Legs brown, tibiae and tarsi pale, fore knees ochre yellow. Abdomen blackish brown, matt.

Head ( Figs. 2–3 ). Frons narrow, about as wide as 1.18 width of eye at level of anterior ocellus, slightly tapering toward lunule. Fronto-orbital plate little distinct, narrow, each about 0.17 width of frons, prominent beyond eye in profile, as broad as scape at level of lunule. Ocellar triangle large, anterior tip reaching level of ors setae. Two long ors setae and 2 shorter inclinate and slightly reclinate ori setae present, distance between the two ors twice as long as that between ori. Orbital setulae in one row, reclinate. Lunule low, only slightly higher than semicircular. First flagellomere covered with short hairs.Arista only 0.88 times as long as eye is high, short setulose. Eye higher than broad in relation 1.3: 1.0, totally bare. Parafacialia very narrow, gena highest in posterior part, reaching 0.28 height of eye. One stronger and long vi seta and 7–8 ge setae present. Epistoma lacking.

Scutum with 0+3 dc setae, 1 st dc seta only 0.3 as long as 3 rd dc, 1 st dc seta inserted in front of sa setae line. Prescutellar seta as long as 1 st dc seta. Acrostichal setulae in 8–10 rows, some hairs reaching beyond line of 3 rd dc setae. One shorter ia seta and numerous presutural and postsutural ia setulae in 5–6 rows present, as long as acr setulae. Postpronotal lobe with 1 hu seta and 6–8 setulae. One long epa seta 1.5 times longer than 1 st dc seta. All usual setae present: 1 oc, 1 pvt, 1 vte, 1 vti, 1 ppl, 1+1 ntp, 1 mspl, 1 stpl, 1 sa, 1 prs, 1 bs, 1 as.

Wing ( Fig. 1 ) 2.52 mm long, costa reaching end of vein M 1, wing apex in middle between R 4+5 and M 1, relation of costal sections 2–4 as 3.64: 1.45: 1.00. Last section of CuA 1 short, only 0.75 as long as last but one section.

Legs: mid tibiae without strong pd setae.

Abdomen oval, 6 th tergite as long as 5 th tergite. Stridulating mechanism ( Fig. 11 ) consisting of weakly sclerotized scales of same shape and size. Male terminalia ( Figs. 7–10, 12, 13 ): epandrium indistinctly broader than high in relation 1.25: 1.00. Surstylus ( Figs. 9–10 ) with about 12 strong spines on inner surface. Cerci long, reaching 0.75 height of epandrium, clavate, with long setae. Phallus ( Figs. 7–8 ) about 0.5 length of phallapodeme, symmetrical, distiphallus slightly pigmented, with short and narrow distal tubules. Mesophallus short, slightly broader than distiphallus. Hypandrium ( Fig. 12 ) V-shaped, with narrow but basally dilated arms. Ejaculatory apodeme ( Figs. 13–14 ) small, only 0.7 as long as phallus, V-shaped, 2.06 times as long as deep.

Female. Unknown.

Body length 2.38–2.55 mm (holotype 2.55 mm).

Variability. The paratype is not distinct in colour from the holotype. Only the following characters are different: the width of frons is 1.30 times broader than the eye and the wing is 2.25 mm long.

Differential diagnosis. The new species belongs to the nigripes group and resembles A. phragmitidis Hendel, 1922 , which differs from A. elladanensis sp. nov. as follows: the eyes are very large, slightly pubescent; the parafacials are not visible in front of the eye in profile; 3 ori setae of the same length are well developed; the gena is highest in the posterior part reaching 0.10–0.17 height of the eye; the wing apex is placed at tip of R 4+5. The male terminalia of both species are clearly different (see GRIFFITHS 1963, SPENCER 1976). Structures of the male terminalia are very similar to the Afrotropical species A. graminaceae Spencer, 1985 , which was described from Kenya ( SPENCER 1985). However, this species is characterized by a broad epistoma, a short ocellar triangle and yellowish-grey calypters with a dark, brownish fringe.

Etymology. This species is named after county Elláda in Greece where the holotype was found.

Bionomics. Unknown.

Distribution. Greece ( Macedonia): Kerkini. Known only from the type locality.

Figures

Figs. 1–6. 1–3 – Agromyza elladanensis sp. nov., J. 1 – wing; 2 – head in frontal view; 3 – the same in lateral view. 4–6 – A. macedonica sp. nov., J. 4 – head in frontal view; 5 – the same in lateral view; 6 – wing. Scales = 0.5 mm (Figs. 2–5) and 1 mm (Figs. 1, 6).

Figs. 7–14. Agromyza elladanensis sp. nov.,J. 7 – phallus in ventral view; 8 – the same in lateral view; 9 – surstylus ventral view; 10 – epandrium, surstylus and cercus in caudal view; 11 – stridulating mechanism; 12 – hypandrium; 13 – ejaculatory apodeme in lateral view; 14 – the same in dorsal view. Scales = 0.1 mm.