Copestylum satur, (OSTEN SACKEN, 1877)

Rotheray, Graham E., Marcos-García, Maria-Angeles, Hancock, Geoff, Pérez-Bañón, Celeste & Maier, Chris T., 2009, Neotropical Copestylum (Diptera, Syrphidae) breeding in Agavaceae and Cactaceae including seven new species, Zoological Journal of the Linnean Society 156 (4), pp. 697-749 : 711-712

COPESTYLUM SATUR (OSTEN SACKEN, 1877)

Larva and puparium ( Fig. 20 ): Dorsal abdominal vestiture confined to medial areas on the transverse bands. Ventral abdominal vestiture of varying length with anterior ends of folds with longer setae than posterior ends. Posterior breathing tube yellowbrown, surface corrugated and shiny, about half width of puparium. TR barely discernable. AP bulging at apex, tapering slightly and 0.75¥ as long as a pupal spiracle. Spiracular openings at apex with simple s-shaped curves. Pupal spiracles long, about 3¥ as long as basal width, slightly outcurved, shiny red with openings in upper third and separated by 1.4¥ their length ( Fig. 49 ).

Taxonomic notes: Copestylum satur is more similar to C. fornax (Townsend, 1895) than to C. fraudulentum (Williston, 1891) . It is distinguished from C. fraudulentum by the shallow TR and vestiture confined to medial areas of abdominal transverse folds and from C. fornax by the yellow-brown, slightly tapering posterior breathing tube and the longer pupal spiracles which are about 3¥ basal length and which are separated by less than 2¥ their length.

Material examined: 3 ♂, 1 ♀, four puparia, two larvae USA Arizona, Yuma 25.ii.1940 HT Rainwater ex decaying Opuntia (SI) .

Previous records: Mann (1969) ex Opuntia .

Figures

Figures 20–22. Third stage larval Copestylum, whole larva, head to the right; scale bar = 6 mm. 20, Copestylum satur; 21, Copestylum tetetzoi sp. nov.; 22, Copestylum vittatum.

Figures 48–53. Pupal spiracles of Copestylum, scanning electron photomicrographs. 48, 50, Copestylum fornax; 48, dorsolateral view length 0.38 mm; 50, whole view from above scale as indicated; 49, Copestylum satur, lateral view length 0.73 mm; 51, 53, Copestylum marginatum; 51, dorsolateral view length 0.82 mm; 53, sculpture between openings, view from above; 52, Copestylum limbipenne, sculpture between openings, view from above.