Phytobia graeca, 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 : 324-327

Phytobia graeca sp. nov.

( Figs. 68–77 )

Type locality. Greece, Macedonia, Serron, Promohonas Village, 41°22′38.1′′N 23°21′58.8′′E, 60 m a.s.l.

Type material. HOLOTYPE: J, ‘ Greece: Promohonas / 41.22.38,1N/23.21.58,8E / Procom Site, 6.–12.vi.2007 / G. Ramel leg., 60 m, MT // Project Kerkini / the biodiversity study of / Wetland Kerkini / G. Ramel leg. // Phytobia graeca sp. nov. / det. M. Černý 2010 // Holotype’ ( NMPC). Loc. No. 32. Terminalia dissected, mounted on the same pin (medium: glycerine and gum resin).

Description (male, holotype). Head blackish brown, frontal vitta black, matt; orbital plate brown, slightly shining. Gena brown.Antenna, arista and palpi brown; antennal cavities black, matt. Epistoma yellow. Thorax black, scutum greyish dusted, scutellum blackish brown. Notopleuron and postpronotal lobe brown. Wings hyaline, base of wing and veins ochre brown, calypters grey, their margin and fringe ochre brown. Legs brown. Abdomen brown.

Head ( Figs. 69–70 ). Frons about as wide as 1.33 width of eye at level of anterior ocellus, slightly tapering toward lunule. Ocellar triangle small. Fronto-orbital plate narrow, each about 0.16 width of frons. Two reclinate ors setae and 2 ori setae inclinate and upper seta slightly reclinate. Orbital setulae short, reclinate. First flagellomere oval, slightly longer than high, shortly haired. Arista only 0.76 times as long as eye height, shorter setulose. 1–2 long vi and 5 ge setae present. Lunula semicircular, upper margin bow-shaped. Gena highest in posterior part, reaching 0.18 height of eye, parafacialia narrow. Very narrow epistoma present.

Scutum with 1+3 anteriorly gradually reduced dc setulae. 1 st and 2 nd dc setae reaching only half length of 4 th dc. Acrostichal setulae in 6–8 rows, 4 longer acr setulae at level of 4 th dc. Scutellum broader than long, index 1.8. All usual setae present: 1 oc, 1 pvt, 1 vte, 1 vti, 1 ppl, 1 hu, 1+1 ntp, 1 mspl, 1 stpl, 1 sa, 1 prs, 1 bs, 1 as.

Wing ( Fig. 68 ) 2.65 mm long, costa ending slightly beyond R 4+5. Wing tip located between R 4+5 and M 1, but distinctly near to former. Relation of costal sections 2–4 as 4.09: 1.22: 1.00. Last section of CuA 1 2 times longer than penultimate.

Legs. Mid tibia with 1 pd seta.

Abdomen oval, 6 th tergite 1.25 times longer than 5 th tergite. Male terminalia ( Figs. 71–77 ): epandrium 1.27 times broader than high, with numerous setae. Surstylus ( Fig. 73 ) well developed, oval with numerous setae inside. Cerci very narrow, tapering to tip, reaching 0.42 height of epandrium. Phallus ( Figs. 71–72 ) about 0.4 length of phallapodeme, distiphallus dilated apically, weakly pigmented. Ejaculatory apodeme ( Figs. 75–76 ) Y-shaped 1.62 times as long as broad, with narrow base. Hypandrium ( Fig. 77 ) broadly U-shaped, with narrow arms and membraneous hypandrial apodeme. Bacilliform sclerites ( Fig. 74 ) V-shaped, with strong and long setae.

Female. Unknown.

Body length 2.75 mm.

Differential diagnosis. Phytobia graeca sp. nov. belongs to the small species of Phytobia Lioy, 1864 . The species generally resembles P. brevicosta Zlobin, 2007 , known only from NE Kazakhstan, in having costal vein extending to R 4+5. The characteristic features of P. brevicosta are: the narrow frons occupying only 1.33 of the eye width; acr setulae in 8–9 irregular rows and reaching line of 4 th dc in 6 rows; costal sections in proportions of 3.25: 1.25: 1.00; fore and mid tibiae without pd setae. The European P. lunulata ( Hendel, 1920) has a similar costa ending at R 4+5, but it is larger, with the wing length 3.3 mm in the male, the frons twice as wide as the eye and the last section of vein CuA 1 1.25 times as long as the penultimate. The structures of the male terminalia indicate a close relationship between this species and the new species (cf. ZLOBIN 2007).

Etymology. The species is named after Greece as the country where the holotype was found.

Bionomics. Unknown.

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

Figures

Figs. 68–70.Phytobia graeca sp. nov., J. 68 – wing; 69 – head in frontal view; 70 – the same in lateral view. Scales = 0.5 mm (Figs. 69, 70) and 1 mm (Fig. 68).

Figs.71–77. Phytobia graeca sp. nov.,J. 71 – phallus in ventral view; 72 – the same in lateral view; 73 – epandrium, surstylus and cercus in caudal view; 74 – bacillifom sclerites; 75 – ejaculatory apodeme in dorsal view; 76 – the same in lateral view; 77 – hypandrium. Scales = 0.1 mm.