Minettia austriaca Hennig 1951

Semelbauer, Marek & Kozánek, Milan, 2014, The immatures of lauxaniid flies (Diptera: Lauxaniidae) and their taxonomical implications, Zootaxa 3780 (3), pp. 401-454 : 412-414

Minettia austriaca Hennig 1951

Living larvae cylindrical, the distal parts of Malpighian tubules expanded.

Egg ( Figs 9, 10 ). 0.81–0.93 mm. Narrow and scaphoid from lateral view, with 6 poorly developed ridges. Posterior tubercle globular and spongy.

First instar. Length 1.40–1.92 mm. Number of scraping cirri per row large (up to 30 in the first row). Row of scraping cirri developed posteriorly to the first one.

Cephaloskeleton ( Fig. 165 ). Length 0.27–0.28 mm. Mouth hooks with 6–7 teeth, stalked part hyaline. Labrum with indicated apical tooth.

Second instar. Length 2.56–3.56 mm. Preparation for SEM was not successful.

Cephaloskeleton ( Fig. 180 ). Length 0.60–0.61 mm. Mouth hooks subparallel, tips ending in two teeth; dental sclerite week. Ventral bridge descending posteriad. Epistomal sclerite broad, arched from dorsal view, hyaline plate present. Subhypostomal sclerites slightly diverging with converging tips. Dorsal bridge trapezoid. Basal portion of the ventral cornua and the vertical plates striolated, dorsal margin sclerotised, posterior end convex. Cibarium slightly pigmented.

Third instar ( Figs 59–64 ). Length 3.38–5.75 mm. Dorsal surface of labial lobe with transversal lamellae in three rows.

Thoracic segments mostly smooth. Abdominal segments villous from lateral and partly from dorsal side. Anterior spiracles with number of papillae organized in horseshoe-like manner.

Cephaloskeleton ( Fig. 195 ). Length 0.91–1.07 mm. Mouth hooks subparallel, dorsal apodeme converging, dental sclerite weak, simple. Intermediate sclerite with tips bend ventrally; ventral bridge simple, descending posteriad. Epistomal sclerite semilunar, as long as broad, posterior hyaline plate semilunar. Subhypostomal sclerites arched, diverging; ligulate sclerites as large converging vertical plates. Dorsal bridge semilunar to rectangular, dorsal cornua slender comparing to ventral cornua, medial part of ventral cornua finely striolated, auricle only indicated, posterior half of ventral cornua sclerotised and convex. Cibarium slightly pigmented.

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 162 – 167. Cephaloskeletons of first larval instar, dorsal (top), lateral (middle) and ventral (bottom) view. 162. Cnemacantha muscaria. 163. Homoneura biumbrata. 164. H. limnea. 165. Minettia austriaca. 166. M. fasciata. 167. M. flaviventris. 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 177 – 182. Cephaloskeletons of second larval instar, dorsal (top), lateral (middle) and ventral (bottom) view. 177. Cnemacantha muscaria. 178. Homoneura biumbrata. 179. H. limnea. 180. Minettia austriaca. 181. M. fasciata. 182. M. flaviventris. a, apodeme of ventral cornu c, cibarium; db, dorsal bridge; dc, dorsal cornua; ds, dental sclerite; 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.

FIGURES 59 – 64. Minettia austriaca, third instar. 59. Cephalic segment, frontal view. Note the transversal lamellae on the dorsal surface of labial lobe. 60. Detail of the ventral organ. 61. Detail of the maxillary palpus. 62. Anterior spiracle, lateral view. 63. Last abdominal segment and the anal division. 64. Posterior spiracles, postero-dorsal view. A, antenna; A 7, seventh abdominal segment; AD, anal division; AL, ambulatory lobe; DP, dorsal process; ES, ecdysial scar; LL, labial lobe; LP, lateral process; MP, maxillary palpus; NS 1, NS 2, first and second accessory sensilla; PC, peristomal cirri; PS, posterior spiracles; PT, peristigmatic tufts; SB 1 - SB 4, first to fourth sensilla basiconica; SC 1 - SC 3, first to third sensilla coeloconica; SC, scraping cirri; VO, ventral organ.

FIGURES 192 – 197. Cephaloskeletons of third larval instar, dorsal (top), lateral (middle) and ventral (bottom) view. 192. Cnemacantha muscaria. 193. Homoneura biumbrata. 194. H. limnea. 195. Minettia austriaca. 196. M. fasciata. 197. M. flaviventris. 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.