Sapromyza sexpunctata Meigen 1826

Semelbauer, Marek & Kozánek, Milan, 2014, The immatures of lauxaniid flies (Diptera: Lauxaniidae) and their taxonomical implications, Zootaxa 3780 (3), pp. 401-454 : 434

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Sapromyza sexpunctata Meigen 1826


Sapromyza sexpunctata Meigen 1826

The mature larvae soft and dorsoventrally flattened with marked welts and crevices. The Malpighian tubules slightly and irregularly inflated.

Egg ( Figs 27–29 View FIGURES 24 – 32 ). Length 0.69–0.75 mm. Ridges clearly developed and sharp, in the dorsal side ridges pronounced with indicated transversal septa. In the ventral side the ridges suppressed, near the apical pole with hexagonal structure, towards the posterior pole the ridges become more apparent.

First instar ( Fig. 141 View FIGURES 141 – 145 ). Length 0.58–0.97 mm. The scraping cirri elongated and numerous (> 25 in a single row).

Cephaloskeleton ( Fig. 175 View FIGURES 174 – 176 ). Length 0.21 mm (n= 1). The mouth hooks with 10 apical teeth; stalked part hyaline, slender.

Second instar ( Figs 142–144 View FIGURES 141 – 145 ). Length 2.16–3.58 mm. The scraping cirri elongated and 23–26 per row. The posterior rows of peristomal cirri very slender, almost filamentous. The first and second thoracic segment smooth, the third one sparsely spinous. The abdominal segments densely spinous. The ambulatory lobes slender.

Cephaloskeleton ( Fig. 190 View FIGURES 189 – 191 ). Length 0.45–0.49 mm. Very similar to P. vittata . Major difference represents only the shape of subhypostomal sclerites.

Third instar ( Fig. 145 View FIGURES 141 – 145 ). Length 3.11–4.04 mm. The scraping cirri up to 40 per row. The first and second thoracic segments smooth. The abdominal segments spinous.

Cephaloskeleton ( Fig. 205 View FIGURES 204 – 206 ). Length 0.77–0.81 mm. Mouth hooks slender, slightly converging; distal part relatively strong and hook-shaped. Intermediates sclerite slender. Epistomal sclerite trapezoid, anterior margin concave. Subhypostomal sclerites peculiar. Rami and parastomal bars very slender. Dorsal bridge approximately as long as broad. Dorsal cornua slender, almost as long as ventral ones. Ventral cornua very broad, mildly sclerotised. Cibarium slightly pigmented.