longhorn beetle, prionus derobrachus? - Prionus heroicus

Moved

… Eric R. Eaton, 17 December, 2007 - 3:12pm

Which is current,

Derobrachus gem*inatus or Prionus derobrachus, or are they even synonymous?

… Jim McClarin, 13 July, 2007 - 7:06pm

Clarifications...

Male individuals of Prionus (Homaesthesis) rarely get this large - the subgenus is distinguished from Prionus (s. str.) by the opaque, non-striolate poriferous areas on the antennae, smaller size (usually less than 30 mm), and less strongly expanded pronotal margins.

Prionus californicus is typically more reddish - the darker coloration of this specimens makes me think it might be Prionus heroicus.

There is no such name as Prionus derobrachus. Derobrachus hovorei is the new name for the species formerly known as Derobrachus geminatus. The species formerly called Derobrachus forreri is the true Derobrachus geminatus.

… Ted C. MacRae, 29 August, 2007 - 11:50am

So which do we have on bugguide,

the old geminatus or the new? See images.

… Jim McClarin, 29 August, 2007 - 7:42pm

I suspect...

...they all represent D. hovorei (the old geminatus) - difficult to say for sure from the photos. It is the common and widespread species. The new geminatus (formerly D. forreri) is much less common and can be distinguished from D. hovorei by its more closely, strongly striolate antennae.

… Ted C. MacRae, 30 August, 2007 - 9:55am

this is the first time i've t

this is the first time i've tried to work through a key, so i am making best guesses and looking up words. my 40 year old latin is some help.

… coultersca, 13 July, 2007 - 8:08pm

Now that you're no longer new,

the word I think you want on your profile page is entomology.

… Jim McClarin, 29 August, 2007 - 7:37pm

thanks

neat to belong to an elite group! I recently found an arizona rhinocerus beetle! a beautiful creature.

… coultersca, 29 August, 2007 - 10:52pm

Prionus sp.

See info. At a glance, this appears to be in the subgenus Homaesthesis [would rule out californicus] - need to pull the literature to verify.

… Phillip Harpootlian, 12 July, 2007 - 7:06am

looking at the insect with more detail, and a book.

Cerambycidae Prionus derobrachus

female - antennae serrate

derobrachus vs Orthosoma
a. 3rd antennomere longer than 1st + 2nd
b. maxillary palps elongate
c. 5th sternite emarginate
d. 6th sternite visible

… coultersca, 13 July, 2007 - 6:01pm

internet hunting for pix.

homaesthesis has hairy feet and more bulbouse antennae segments.

… coultersca, 13 July, 2007 - 12:34pm

Not sure it is.

I've seen specimens with three and four lateral spines on pronotum, never two.

… Jim McClarin, 11 July, 2007 - 5:14pm

Beetle

Giant Root Borer - Prionus californicus - photo 40948, I do not know how to link this page to that photo. They look alike.

… Richard Wasson, 11 July, 2007 - 9:16pm

prionus californicus

The online photos look as if californicus is red. this specimen is Black. Is that acceptable within the species?

… coultersca, 11 July, 2007 - 10:33pm