Cerodontha (Poemyza) pygmaea (Meigen)

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 : 40-42

Cerodontha (Poemyza) pygmaea (Meigen)

( Figs. 109–111 , 439–444 )

Material examined: Ukraine: Ivano-Frankivsk Region: E slope of Hoverla Mt. , 48°09’N, 24°32’E, 1421 m a. s. l., 11.vi.2018, Yu. Guglya (1♂) ; Kyiv Region: Kyiv, Trukhaniv Island , 50°28’14”N, 30°32’52”E, 26.vii.2019, 3, 7.viii.2019, Yu. Guglya, ex Dactylis glomerata (2♂ 2♀) ; Kharkiv Region: near Haidary, The National Nature Park “Homilshanski Lisy”, 49°37’N, 36°19’E, 26–31.vii.2020, Yu. Guglya, ex Lolium giganteum (7♂ 2♀) ; Kharkiv, Lisopark , 49°25’N, 36°15’E, 16.vii.2020, Yu. Guglya, ex Lolium giganteum (1♀) ; Donetsk Region: Kryva Luka , 13 km SEE Lyman, 48°52’N, 37°54’E, 13, 16.vi.2019, Yu. Guglya, ex Dactylis glomerata (1♂ 2♀) .

Hosts. Poaceae : Agropyron Gaertn. , Agrostis L., Apera Adans. , Arrhenatherum P. Beauv. , Avena L., Brachypodium Beauv. , Bromus L., Dactylis L., Deschampsia Beauv. , Festuca Tourn. ex L., Glyceria R. Br. , Holcus L., Hordeum L., Lolium L., Phalaris L., Phleum L., Poa L., Secale L., Triticum L. ( Benavent-Corai et al. 2005), Avenula (Dumort.) Dumort. , Calamagrostis Adans. , Elymus L., Melica L., Molinia Schrank , Phragmites Adans. ( Warrington 2021) .

Mine. ( Fig. 109 ) Larvae form a blotch blister mine apically on the leaf. They may be solitary or up to six larvae may feed together. Pupation takes place within the mine.

Puparium. ( Figs. 110, 111 ) Black, mirror-shining except two last abdominal segments, which are matt and finely folded; 2.2 mm long, with deep segmentation; surface smooth except for narrow wrinkled spine bands. Both posterior spiracles are set on a single wide conical finely folded protuberance; brown, each with three short, curved and finger-like bulbs. Posterior spiracles viewed from the side and above are depicted in Nowakowski (1973: Figs. 179 , 235 ). Anal plate strongly protruding above the surface of the puparium viewed from the side and directed posteriorly.

Cephalopharyngeal skeleton. ( Fig. 439 ) Right mouthhook much larger than the left, both rounded ventro-posteriorly, with ventro-anterior portion in left hook and anterior portion in right hook sharply abducted. Each mouthhook bears two sharp accessory teeth. Intermediate sclerite long, narrow, slightly curved, with short, sharp, weakly sclerotized finger-like process directed ventro-posteriorly, 1.38× as long as maximum height of left mouthhook. The mouthhook, the intermediate sclerite centrally and anterior portion of the pharyngeal sclerite are strongly sclerotized, dorsal and ventral cornua in contrast very weakly so. Indentation index 88. See also in Nowakowski (1973: Fig. 179 ).

Female head. ( Figs. 440, 441 ) Black, with gena brown and proboscis orange; orbit not projecting above eye in profile, 2 orb s, 2 fr s; lunule very high and broad, reaching the level of the posterior fr s; pped small, rounded; gena medially 0.15× as high as maximum height of eye.

Female genitalia. ( Figs. 442–444 ) Capsule of spermatheca is relatively small, 0.16× as high as height of anterior part of oviscape. Spermathecae equal in size, dark brown, spherical, slightly flattened basally, without basal collar. Neck of spermatheca conical, longer than wide, strongly narrowing in the direction of duct, 1.33× as long as maximum width. Spermathecal duct weakly sclerotized. Ventral receptacle anchor-shaped.

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

Figures

FIGURES 104–111. Figures 104–106: Cerodontha (Poemyza) muscina (Meigen); 104: mine in Lolium giganteum leaf; 105– 106: posterior segments of puparium; 105: lateral view; 106: posterior view. Figures 107–108: C. (Poemyza) phragmitidis Nowakowski, posterior segments of puparium; 107: lateral view; 108: posterior view. Figures 109–111: C. (Poemyza) pygmaea (Meigen); 109: mine in Lolium giganteum leaf; 110–111: posterior segments of puparium; 110: lateral view; 111: posterior view.

FIGURES 439–444. Cerodontha (Poemyza) pygmaea (Meigen); 439: cephalopharyngeal skeleton; 440: frontal view of head; 441: head viewed from the side; 442: oviscape and spermathecae proportionally; 443: spermathecae; 444: ventral receptacle.

FIGURES 176–184. Figures 176–180: Phytomyza abdominalis Zetterstedt; 176: mine in Hepatica nobilis leaf; 177: larva viewed from the side; 178: puparium viewed from the side; 179: anterior segments of puparium (anterior view); 180: posterior segments of puparium (posterior view). Figures 181–184: Phytomyza aquilegiae Hardy; 181: mines in Aquilegia hybr. leaf; 182: empty puparium viewed from the side; 183: posterior segments of puparium (posterior view). 184: posterior spiracles (posterior view).

FIGURES 221–235. Figures 221–225: Phytomyza nowakowskiana Beiger; 221–222: mine in Symphytum cordatum leaf; 223: empty puparium viewed from the side; 224: posterior segments of puparium (posterior view); 225: posterior spiracles (posterior view). Figures 226–230: P. pulmonaria Nowakowski, reared from Myosotis sparsiflora; 226: mine; 227: puparium in mine; 228: empty puparium viewed from the side; 229: posterior segments of puparium (posterior view); 230: posterior spiracles (posterior view). Figures 231–235: P. pulmonaria Nowakowski, reared from Symphytum asperum; 231: mines; 232: puparia in mine; 233: empty puparium viewed from the side; 234: posterior segments of puparium (posterior view); 235: posterior spiracles (posterior view).