Minettia loewi (Schiner 1864)

Semelbauer, Marek & Kozánek, Milan, 2014, The immatures of lauxaniid flies (Diptera: Lauxaniidae) and their taxonomical implications, Zootaxa 3780 (3), pp. 401-454 : 419

Minettia loewi (Schiner 1864)

Living larvae cylindrical, the distal parts of Malpighian tubules expanded with typical ventral loop. Posterior pole with characteristic cylindrical tubercle.

Egg ( Figs 11, 12 ). Length 0.60–1.73 mm. Slender, with numerous ridges, ribs not developed; Chorion smooth. Micropylar pole dorsoventrally flattened. Posterior pole with cylindrical.

First instar. Length 1.34–2.17 mm. Cephalic segment: an additional small row of scraping cirri present posteriorly to the first row of the scraping cirri. Number of cirri per row large (up to 32). Peristomal cirri in few rows. Labial lobe with shallow apical incision, smooth on inner surface.

Cephaloskeleton ( Fig. 168 ). Length 0.27– 0.24 mm. Mouth hooks with 5–6 teeth, stalked part hyaline.

Second instar. Length 2.14–3.37 mm. Scraping cirri in 20 per row. The first thoracic segment with narrow belt of comb spines dorsally.

Cephaloskeleton ( Fig. 183 ). Length 0.42 mm (n=1). Mouth hooks converging, two apical teeth. Epistomal sclerite shorter than broad, arched from dorsal view, posterior hyaline plate present. Subhypostomal sclerites parallel with opposite tips. Dorsal bridge trapezoid. Ventral cornua virtually straight and sclerotised along the dorsal margin. Cibarium hyaline.

Third instar was not acquired.

Figures

FIGURES 9 – 14. Eggs of species of Minettia. 9. M. austriaca, lateral view. 10. Same, detail of the posterior tubercle. 11. M. loewi, dorsal view. 12. Same, detail of the posterior tubercle. 13. M. plumicornis, lateral view. 14. Same, detail of the posterior tubercle.

FIGURES 168 – 173. Cephaloskeletons of first larval instar, dorsal (top), lateral (middle) and ventral (bottom) view. 168. Minettia loewi. 169. M. plumicornis. 170. Poecilolycia vittata. 171. Pseudolyciella pallidiventris. 172. Sapromyza apicalis. 173. S. hyalinata. c, cibarium; db, dorsal bridge; dc, dorsal cornua; dmh, distal part of mouth hook; es, epistomal sclerite; is, intermediate sclerite; lb, labrum; ls, ligulate sclerite; smh, stalked part of mouth hook; pb, parastomal bar; ss, subhypostomal sclerite; vb, ventral bridge; vc, ventral cornua; vp, vertical plate.

FIGURES 183 – 188. Cephaloskeletons of second larval instar, dorsal (top), lateral (middle) and ventral (bottom) view. 183. Minettia loewi. 184. P. litura. 185. Poecilolycia vittata. 186. Pseudolyciella pallidiventris. 187. Sapromyza apicalis. 188. S. hyalinata. a, apodeme of ventral cornu; c, cibarium; db, dorsal bridge; dc, dorsal cornua; es, epistomal sclerite; is, intermediate sclerite; lb, labrum; ls, ligulate sclerite; mh, mouth hook; pb, parastomal bar; r, rami; ss, subhypostomal sclerite; vb, ventral bridge; vc, ventral cornua; vp, vertical plate.