Taxonomy of locusts: Truxalis and Acrida

I think the question is too specific and the topic is too general. I suggest changing the title of the topic to a more specific one, such as" Taxonomy of locusts: genera Truxalis and Acrida " or something like that.

At a minimum, arolias are different - akridas have large ones, and Truxals have small ones. BTW, a sign of a life form . And in General: 1) the subfamily seems to be one (and s. str., although I'll be careful about the tribe...), and in the taxonomy of R. Acrida, the devil will break his leg since the time of Dirsch...

Arolii are unpaired suckers between the claws. Nasuta is, as far as I remember, a Western European species of the genus Truxalis; in the south of the former USSR, it is replaced by the closely related T. eximia. A. hungarica straminea and A. oxycephala are relevant from the acridae in Eastern Europe (including European Russia).

As a person involved in bioacoustics of insects and their acoustic devices, I would venture to agree that Truxalis and Acrida are independent genera (sensu Dirsh), since at least male Truxalis (to be honest, I have not personally checked all representatives of both genera) have an acoustic device made of a stridulation keel on the inner side of the rear thigh, which both sexes do not have acrid. Roughly speaking, Truxalis "sing", acrid "silent".

2secondary Specialist:
A few questions about the Truxalis sound system:
1) It turns out that it is organized as in Oedipodinae, and not as in Gomphocerinae?
2) I wonder how they use it-for a distant call or in parallel with tactile contact?
3) By the way, are there any records?

2 PVOzerski

1) Absolutely everything is exactly the opposite. The acoustic apparatus of the Truxalis is similar to that of the Gomphocerinae. The difference between Oedipodinae and Gomphocerinae at the level of sound apparatuses (I want to say right away, this is not the only sign) is that the tegmino-femoral sound apparatus of Oedipodinae is represented by stridulation tubercles formed by cuticular protrusions, in contrast to the femoro-tegminal apparatus of Gomphocerinae, whose stridulation spines are sensillae that have a direct connection with the central nervous system an insect, which we also probably see in Truxalis.

2-3) They use it for its intended purpose-chirping. The sound can be heard from a distance, because my colleagues in the department, as well as foreign researchers, recorded it from a microphone. Link to an abstract of one such article on Truxalis nasuta signals - http://www.unipv.it/cibra/absibac.html

P.S. I realized that you, a colleague, did not think correctly: "stridulation keel" - I did not mean a smooth rib, but a rib with a number of stridulation spines (pars stridens) on it.

This post was edited by Insect Expert - 09/21/2005 11: 10

I'll change the subject a little. Recently, I accidentally came across an image and a brief description of one (African?) locust-Brachycrotaphus tryxalicerus Fisher, from the subfamily. Gomphocerinae, as I understand it, is a relative of Ochrilidia.

Dear experts, changing confuses the following-the extremely similar shape of the body and head with those of Acridinae, of course, is explained by convergence; but why such a similar, bright xiphoid, mustache shape? Does this similarity have the same nature, and therefore this shape of the antennae is an adaptation (that's just what?); or is the mechevil shape of the antennae the original one for all Acrididae?

Please explain.

Pictures:
  tr123.JPG — (6.43к) 03.10.2005 — 02.11.2005

Duck antennae and pyrgomorphids are often xiphoid, by the way - and they did not lie close to the acridae. See, for example, http://www.biologie.uni-osnabrueck.de/oeko...pha-conica3.jpg

And I don't know whether it's the adaptability of the trait or some correlations at the level of genetics and morphogenesis.

Last year, we managed to record akrida signals from the Crimea and deal with its stridulation. Information published: Benediktov A. A. 2008. Acoustic communication of locusts of the genus Acrida Linnaeus, 1758 (Orthoptera, Acrididae, Acridinae) / / Eversmannia. No. 15-16. pp. 83-87.

So do acrids still have a voice?

They have a small voice, but it's quiet.

Pnatno, sps