The lovely stalk-eyed fly

| 1 Comment
Sphyrocephala beccarii

Here is a spectacularly pretty and weird animal: stalk-eyed flies of the family Diopsidae. There are about 160 species in this group that exhibit this extreme morphology, with the eyes and the antennae displaced laterally on stalks. They often (but not always) are sexually dimorphic, with males having more exaggerated stalks—the longer stalks also make them clumsy in flight, so this is a pattern with considerable cost, and is thought to be the product of sexual selection. The Sphyrocephala to the right is not even an extreme example. Read on to see some genuinely bizarre flies and a little bit about the development of this structure.

Continue reading "The lovely stalk-eyed fly" (on Pharyngula)

1 Comment

“All the better to see you with, my dear!”

About this Entry

This page contains a single entry by PZ Myers published on March 15, 2007 10:52 AM.

“Understanding Evolution” Website was the previous entry in this blog.

Chimps at risk from antibiotic-resistant bacteria is the next entry in this blog.

Find recent content on the main index or look in the archives to find all content.



Author Archives

Powered by Movable Type 4.381

Site Meter