The calloptera species group is endemic to the Neotropics (Burla and Pavan, 1953) and currently contains eight described species (Baechli, 2005). This group is characterized by having spectacular wing patterns (Wheeler, 1968) which are reminiscent of the adiastola species group of picture-winged Hawaiian Drosophila. Throckmorton (1975) considered this group to be most closely related to the species groups of the tripunctata radiation and Remsen and O’Grady suggest that, within this large radiation, the guarani species group is the sister taxon of the calloptera group.
(excerpted from Markow and O’Grady, 2006, Chapter 1)
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