[Taxacom] Proventrum or prosternum?

[Michael A. Ivie]

As is so often the case, it depends.  It depends on the Order you are 
talking about, and in the Coleoptera even what group.

Prosternum is a strict morphological term that implicitly suggests a 
hypothesis of morphological homology with the original sternum of the 
prothoracic segment in the primitive insect.

Proventrite is a positional term with no such implication of 
morphological homology.  It is just the sclerotized area between and 
anterior to the procoxae, no mater what original sclerites are 
incorporated.  So, the usage can be either, depending on the information 
content intended by the author, but they are not the same thing.  When 
you choose, you should known which you mean, and be able to justify it.

Mike

On 12/27/2015 12:06 PM, Christopher Carlton wrote:
> My understanding is that, among the three thoracic subdivisions, the prothorax is the only one that is hypothesized to comprise the original segmental components, including sternite, with the other two being composites of each other and the first abdominal, reaching an extreme in Hymenoptera.
>
> But that might now be an old school interpretation. I refer to the prosternum, then meso-, and metaventrites in beetle papers and no one has objected to those usages recently. Oddly, seemingly there is no push to refer to the dorsal sclerites  as dorsites.
>
> I'd be curious myself to see what other opinions are out there.
>
> Chris Carlton, Ph. D.
> Director, Louisiana State Arthropod Museum
> President, Coleopterists Society
> Department of Entomology, LSB-404
> 110 Union Sq., Baton Rouge, LA 70803-1710
>
> ________________________________________
> From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu> on behalf of JF Mate <aphodiinaemate at gmail.com>
> Sent: Sunday, December 27, 2015 12:52 PM
> To: Taxacom
> Subject: [Taxacom] Proventrum or prosternum?
>
> Proventrum or prosternum? I have been recently told by a reviewer that
> the latter term is somewhat outdated. As far as I can tell prosternum
> is the standard, accepted term (Torre-Bueno, Matsuda, Snodgrass...)
> and the most commonly used by researchers. Has there been a recent
> move to harmonize morphological terminology that I am unfamiliar with?
>
> Best and Happy Holidays
>
> Jason
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-- 
__________________________________________________

Michael A. Ivie, Ph.D., F.R.E.S.

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