Heleomyza borealis

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 : 2079

Heleomyza borealis

Puparium. Length 5–6 mm (n = 3), length of second abdominal segment 0.6 mm, red brown in ground colour, dorsal tranverse striae arranged into distinctive pairs of annulations circumventing abdominal segments 2–7 ( Figure 1B ); locomotory spicules extensive; ventrally spicules of variable size and occurring in short to long bars or rows and extending but reducing in number from the ventral to the dorsal surface of abdominal segments 1–7 ( Figures 1B , 6C ); anterior spiracles transverse rosetteshaped with 12 respiratory bulbs ( Figure 3C ); projections bearing posterior spiracular plate about as long as basally wide and in dorsal view, spiracular plates separated by about three times the width of a spiracular plate; spiracular plate ( Figure 4C ), with an indented margin, but lacking an additional projection between the spiracular slits (e.g. Figure 4D–F ); posterior spiracular slits short, about as long as the diameter of the ecdysial scar; head skeleton ( Figure 9E,F ), length 1 mm; mandible with a pin-hole window and sharply angled apical hook; intermediate sclerite bar-shaped with ventral bridge towards anterior end ( Figure 9F ); epipharyngeal plate lightly sclerotized.

Material examined. Three puparia, Scotland, St Kilda , Hirta, Village Bay, ex dead sheep, collected 31 May to 7 June 2005, EG Hancock and J. Robinson .

Figures

Figure 1. Heleomyzidae, whole puparia, lateral view, anterior end to the left, dorsal margin uppermost, (A) Heteromyza rotundicornis, length 5 mm, (B) Heleomyza borealis, length 6 mm, (C) Suillia variegata, length 4 mm.

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 4. Heleomyzinae and Heteromyzinae, posterior spiracles, apical view, scale bar 0.1 mm, Heleomyzinae: (A) Eccoptomera microps, (B) Scoliocentra brachypterna, (C) Heleomyza borealis; Heteromyzinae: (D) Tephrochlamys flavipes, (E) Tephrochlamys tarsalis, (F) Heteromyza rotundicornis.

Figure 6. Heleomyzinae, 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) Eccoptomera microps, (B) Scoliocentra brachypterna, (C) Heleomyza borealis.

Figure 9. Heleomyzinae, head skeletons, left hand figures, whole structure, lateral view, mandible to the right, right hand figures, dorsal view of intermediate sclerite and mandible in that order, scale bar 0.25 mm, (A, B) Eccoptomera microps, (C, D) Scoliocentra brachypterna, (E, F) Heleomyza borealis.