Copestylum cochabamba, Rotheray & Marcos-García & Hancock & Pérez-Bañón & Maier, 2009

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 : 713-714

COPESTYLUM COCHABAMBA ROTHERAY, MARCOS &

HANCOCK SP. NOV.

Adult: Male holotype: face with lateral margins inflated and with slight lateral tubercles near the eye margins below the antennae. Face indented slightly from just above margin of mouth so lower part of face appears as a narrow projection (view from in front). Face and genae yellow and yellow haired except for some black hairs on the central tubercle and on the lower lateral margins of the face. Face without vittae. Tubercle large and prominent and elongate oval in side view. Mid point of tubercle appearing below the mid point between the antennae and the mouth Fig. 5 ). Frons yellow with black hairs. Antennae yellow with plumose arista and basoflagellomere slightly constricted in the middle and 2.5¥ as long as broad, rounded apically. Ocellar triangle dark yellow and black haired, suture about same length as ocellar triangle. Eyes with yellow hairs reaching lower margins, slightly longer on top of head. Ground colour of mesonotum black except for vague yellowish lateral and posterior margins and transverse suture also yellow marked. Postpronotum well developed, forming a rounded yellow lobe as wide as long with long, yellow and black hairs and two to three black bristles on posterolateral margin. In profile view mesonotum has mixed length pale and black hairs but when viewed from behind, mesonotum has an alternating pattern of hairy, gold and black stripes. Lateral margins with mixed long pale hairs and black bristles. Posterior margin with a row of eight+, thin, prescutellar black bristles, these bristles stronger towards the medial line. Scutellum dark yellow with mixed length black hairs except for pale haired margins and posterior margin with six very strong, socketed, black bristles. Pleurae black except for yellow mark on dorsal margin of posterior anepisternum and densely coated in long yellowish hairs and a row of six+ black bristles on the posterior anepisternum. Wing membrane hyaline, without microtrichia. Legs black with yellowish tibiae and completely black haired. All sternites brown, shiny with long pale hairs. Tergites 1–3 dark yellow, tergite 4 black all coated in short and posteriorly reclined black hairs. Hairs on tergite 4 longer than on other abdominal tergites. Genitalia: in profile view, surstylus longer than basally wide, rounded and slightly tapered at the apex with dark bristles on the inner and anterior sides. Cerci flat tipped. In profile view, epandrium longer than basally broad. Hypandrium indented ventrobasally with below, a rounded ridge across the ventral margin. Hypandrium smoothly punctured and covered with fine pile. Superior lobe dorsally rounded and with a hook shaped apex ( Figs 10, 11 ).

Female: Similar to holotype male; width of vertex about 2/5 width of head.

Length: Body 13.0– 13.1 mm; wing 12.5 mm (N = 2).

Puparium: Anterodorsal margin of mesothorax with enlarged setae and spicules. Dorsal vestiture of abdomen spread across folds and not strongly confined to medial transverse bands. Crochets translucent with red tips. Posterior breathing tube dark brown, short, about 1/10 as wide as puparium, AP only 0.6¥ as long as TR is wide, coriaceous not tapering and slightly bulging ventrally with midventral groove ending before halfway point to TR. Pupal spiracles about 1.6¥ as long as AP and 1.2¥ as wide apart as a pupal spiracle is long.

Material examined: Holotype: male with puparium BOLIVIA, Cochabamba, ix.2004, ex decaying Opuntia . Known only from this locality, collected by G. E. R. and E. G. H. ( NMS).

Paratype: 1 ♀ with puparia, same data as holotype ( HM) .

Etymology: The name refers to ‘Cochabamba’, the Bolivian locality where the larva of the type specimen was collected.

Taxonomic notes: In the Scutellata group key of Fluke (1951), the adult of C. cochabamba keys out to C. rectum (Wulp, 1882) . Fluke (1951) provided a description of a species that he determined as C. rectum but questioned whether his determination was correct on the basis of discrepancies between his specimens and the description of recta given by Wulp. Copestylum cochabamba differs from both C. recta Wulp and C. rectum sensu Fluke (1951) in the following combination of characters: a flattened not a well rounded facial tubercle, black not pale haired facial margins, pale not black hairs on the abdominal sternites, and in the male genitalia by a rectangular not squareshaped epandrium with surstyli that are taller rather than shorter than basally long.

The puparium of C. cochabamba is distinguished from other early stages of the Scutellatum group by the dark brown posterior breathing tube which does not taper, AP about half as long as TR is wide and the pupal spiracles which are about as long as TR is wide.

Figures

Figures 5–7. Adult Copestylum, lateral view of the head; scale bar = 2 mm. 5, Copestylum cochabamba sp. nov., male holotype; 6, Copestylum milae sp. nov., male holotype; 7, Copestylum hidalgense sp. nov., male holotype.

Figures 8–11. Adult Copestylum, male genitalia; scale bar = 0.30 mm. 8–9, Copestylum multipunctatum sp. nov., male holotype: 8, genitalia and associated structures, lateral view; 9, hypandrium, ventral view. 10–11, Copestylum cochabamba sp. nov., male holotype: 10, genitalia and associated structures, lateral view; 11, hypandrium, ventral view.