Male Rhino Beetle’s Horn Doesn’t Seem To Cost Much
by Susan Milius
While the spiked horns on rhinoceros beetles may look like masculine sacrifice for the sake of huge weapons, the protrusions may not be such a drag after all.
Male Trypoxylus dichotomus beetles grow upswept rhino-style horns with forked tips that they use in struggles to flip rivals off trees where females feed. “Imagine a beetle flying around with a pitchfork on the front of its head,” said Erin McCullough of the University of Montana.
Cumbersome as the horn looks, though, McCullough and her colleagues are having trouble documenting much inconvenience to the beetle, she reported January 5 at the annual meeting of the Society for Integrative and Comparative Biology.
“It’s surprising,” said evolutionary biologist Christopher J. Clark of Yale University’s Peabody Museum, who heard the presentation. “It just feels like there should be a large cost.”
(read more: Science News) (photo: Wikimedia/Joi Ito)
I would just like to point out that Erin McCullough and I are collaborating this semester to map the density of the sensory hairs on the horns of these beetles using a Scanning Electron Microscope to see if the density correlates with points of high contact during competition. My thesis will also probably involve characterizing the gene expression during late prepupal stages of this beetle.
SCIENCE
(via buggirl)
I would just like to point out that Erin McCullough and I are collaborating this semester to map the density of the...
BEETLES I LOVE YOU
nice hornse……… big boy………….