Suillia ustulata (Meigen, 1830)

Rotheray, Graham E., 2012, Morphology of the puparium and breeding sites of eight species of Heleomyzidae (Diptera), Journal of Natural History 46 (33 - 34), pp. 2075-2102 : 2092

Suillia ustulata

Puparium. Length 7–8 mm (n = 2), length of second abdominal segment 0.7 mm, dark red-brown in ground colour; dorsal transverse striae well developed across the middle of abdominal segments 1–7; locomotory spicules numerous and variable in size and blunt tipped ( Figure 8A ); spicule band circumventing body segments and continuing to the dorsal surface of segments 1–5 but spicule bands reduced in width on segments 4 and 5 and absent on dorsum of segments 6 and 7; rosette-shaped anterior spiracles with 14 respiratory bulbs ( Figure 3I ); projections bearing posterior spiracular plates black, about twice as wide at base as at apex and not as high as basally wide; spiracular plates separated by about 1.5 times width of a spiracular plate; spiracular plate ( Figure 5B ), smooth-rimmed, without indentations or a projection between spiracular slits 1 and 2; posterior spiracular slits long, longer than the diameter of the ecdysial scar; head skeleton ( Figure 11C,F ), length 1.6 mm; mandible without a pin-hole window or accessory teeth; apical hook wide such that, in lateral view, the hook is almost as wide as the intermediate sclerite; base of mandible irregular in profile shape, with the lower margin inclined, downwards and tapering, not parallel with the lower margin of the basal sclerite such that the lower muscle attachment point is almost in the same plane as the upper attachment point ( Figure 11C ); intermediate sclerite box-shaped with ventral bridge at the middle ( Figure 11F ); epipharyngeal plate heavily sclerotized; dorsal cornu about as wide as ventral cornu and heavily sclerotized; vertical plate sclerotized and short, about as long as intermediate sclerite.

Material examined. Scotland, Midlothian, Bonnyrigg , two puparia ex elder stem, Sambucus nigra , date collected not recorded, female emerged 17 July 1957, male emerged 22 July 1957, EB Basden .

Figures

Figure 3. Heleomyzidae, anterior spiracles, lateral view, scale bar 0.1 mm, fan shape: (A) Eccoptomera microps, (B) Scoliocentra brachypterna; transverse rosette shape: (C) Heleomyza borealis, (D) Tephrochlamys flavipes, (E) Tephrochlamys tarsalis, (F) Heteromyza rotundicornis; rosette shape: (G) Suillia variegata, (H) Suillia laevifrons, and (I) Suillia ustulata.

Figure 5. Suillinae, posterior spiracles, apical view, scale bar 0.1 mm, (A) Suillia variegata, (B) Suillia ustulata, (C) Suillia laevifrons.

Figure 8. Suillinae, locomotory spicules, across mid-ventral zone of the posterior margin of the second and the anterior half of the third abdominal segment, uppermost vertical line indicates the mid-ventral point, horizontal line indicates approximate segment boundary, (A) Suillia ustulata, (B) Suillia variegata, (C) Suillia laevifrons.

Figure 11. Suillinae, head skeletons, uppermost figures, whole structure, lateral view, mandible to the right, lower figures, dorsal view of intermediate sclerite and mandible in that order, scale bar 0.25 mm, (A, D) Suillia variegata, (B, E) Suillia laevifrons, (C, F) Suillia ustulata.