Cerodontha (Poemyza) spencerae Zlobin

Guglya, Yuliia, 2021, Rearing mining flies (Diptera: Agromyzidae) from host plants as an instrument for associating females with males, with the description of seven new species, Zootaxa 5014 (1), pp. 1-158 : 42

Cerodontha (Poemyza) spencerae Zlobin

( Figs. 81–83 , 445–449 )

Material examined: Ukraine: Volyn Region: near Lutsk, Dachne , 50°48’N, 25°22’E, 7.vi.2019, Yu. Guglya (8♂ 4♀) ; Transcarpathia: near Dilove , 48°55’N, 24°14’E, 490 m a. s. l., 15.vi.2017, Yu. Guglya (6♂) ; Nova Stuzhytsa , 49°02’N, 22°34’E, 450 m a. s. l., 6–7.vii.2019, Yu. Guglya (3♂ 1♀) ; Kharkiv Region: near Petrivske , 49°10’N, 36°58’E, 11–13.vii.2020, Yu. Guglya, ex Elymus repens (1♂ 4♀) ; near Rubizhne , 50°10’N, 36°47’E, 18.v.2019, Yu. Guglya (1♂ 1♀) .

Host. Poaceae : Elymus repens (L.) Gould—a newly recorded host plant.

Mine. ( Fig. 81 ) Larvae form a white blotch mine apically on the leaf. Two larvae feed together in each mine. Pupation takes place outside the mine.

Puparium. ( Figs. 82, 83 ) Orange-brown, glossy, 2.0 mm long, with distinct segmentation; surface quite smooth except for wide spine bands. Posterior spiracles set on high and narrow conical protuberances ending with stalk and entirely strongly separate; dark brown, with two small spherical bulbs set at the top of the stalk. Anal plate strongly protruding above the surface of the puparium viewed from the side and directed ventro-posteriorly.

Cephalopharyngeal skeleton. ( Fig. 445 ) Right mouthhook much larger than the left, both with sharp portion directed ventro-anteriorly. Each mouthhook bears two sharp accessory teeth. Intermediate sclerite narrow, slightly curved, with long, sharp finger-like process directed ventro-posteriorly, 1.52× as long as maximum height of left mouthhook. The mouthhook, intermediate sclerite and anterior portion of the pharyngeal sclerite are strongly sclerotized, dorsal and ventral cornua much less so. Indentation index 80.

Female head. ( Figs. 446, 447 ) Brownish-black, with face, gena and proboscis dirty orange; orbit not projecting above eye in profile, 2 orb s, 2 fr s and narrow lunule, reaching the level between fr s; pped small, rounded, dirty yellow; gena medially 0.1× as high as maximum height of eye, dirty yellow.

Female genitalia. ( Figs. 448, 449 ) Capsule of spermatheca relatively small, 0.16× as high as height of anterior part of oviscape. Spermathecae equal in size, dark brown, asymmetrically semicircular, flattened basally. Neck of spermatheca long, slightly curved, as strongly sclerotized as capsule; 0.57× as long as height of spermatheca. Spermathecal duct with spiral sclerotization.

Distribution. Palaearctic ( Papp & Černý 2016). Ukraine (first record).

Figures

FIGURES 75–83. Figures 75–77: Cerodontha (C.) phragmitophila Hering; 75–76: posterior segments of puparium; 75: lateral view; 76: posterior view. 77: posterior spiracles (posterior view). Figures 78–80: C. (Butomomyza) gibbifera spec. nov.; 78–79: posterior segments of puparium; 78: lateral view; 79: posterior view. 80: posterior spiracles (posterior view). Figures 81–83: Cerodontha (Poemyza) spencerae Zlobin; 81: mine in Elymus repens leaf; 82–83: posterior segments of puparium; 82: lateral view; 83: posterior view.

FIGURES 445–449. Cerodontha (Poemyza) spencerae Zlobin; 445: cephalopharyngeal skeleton; 446: frontal view of head; 447: head viewed from the side; 448: oviscape and spermathecae proportionally; 449: spermatheca.