Holometabola versus Hemimetabola

Rather, Hemimetabola is a polyphyletic group. IMHO, complete metamorphosis-Holometabola synapomorphy. If I'm wrong , I'll be happy to read the refutations, especially since I can't prove this synapomorphy.

Without a doubt, Hemimetabola is a polyphyletic taxon, but after Martynov and Rasnitsyn, it is usually no longer considered: Polyneoptera and Paraneoptera. In general, it seems to me that the compilation of Hexapoda systems, which is given in the "Modern Taxonomy of Insects", is the most adequate, at least, I do not see any special objections to it. But it's really interesting to hear about the Holometabola polyphyly, where it seems that the origin of the orders from each other is almost obvious. By the way, complete metamorphosis is indeed a characteristic feature, but still it cannot be the main one - after all, its similarity, sometimes quite close, exists in some proboscids, and, in addition, Holometabola usually includes myomantids, evidence of complete metamorphosis in which is not found.

This post was edited by Dracus - 13.01.2006 23: 54

Hemimetabola's polyphyletic nature is related to the positions of strigoi, mayflies, and freckles? Or do all the other sons-in-law together also have no common ancestor among the postmandibular ones? And from whom, then, do they originate? And in general, how in this case to interpret the Bristle-tails, and what to do with the Occult-maxillary ones? Are they somehow sideways ancestors of some postcard-jawed ones? Or are they completely side branches? By the way, again, do they or do they not have a common ancestor among the Six-legged?

I almost forgot: what about different types of Holometabola pupae? Different stages of evolution of complete transformation or different branches? (Assuming they are monophyletic?)

If you compare the pupae of abscesses and fan-wings in this way, you can come to the conclusion that abscesses are not beetles.

Rather, the fan-winged ones (Strepsiptera) are not beetles

This post was edited by Bad Den - 14.01.2006 17: 37

Or maybe Fan-wings are such "beetles" that have gone very far in their parasitism? By the way, in my opinion a similar picture Diptera-fleas.
"But it's really interesting to hear about the Holometabola polyphyly, where it seems that the origin of the units from each other is almost obvious."
Who's from whom?

Bad Den

If we look from the point of view of kinship, we should have combined proboscids and Holometabola, which, most likely, descended from proboscids, but this is prevented by the synapomorphy of Holometabola. The only way out is to select three large neopteran taxa instead of two.

I may be picking on the words, but how can Holometabola synapomorphy prevent the association of proboscids and Holometabola in a taxon opposed to polyineopters?

Well, such a taxon would not have reliable synapomorphy. I think most proboscis and holometabolas have lost their common features.

Without a doubt, Hemimetabola is a polyphyletic taxon, but after Martynov and Rasnitsyn, it is usually no longer considered: Polyneoptera and Paraneoptera. In general, it seems to me that the compilation of Hexapoda systems, which is given in the "Modern Taxonomy of Insects", is the most adequate, at least, I do not see any special objections to it. But it's really interesting to hear about the Holometabola polyphyly, where it seems that the origin of the orders from each other is almost obvious. By the way, complete metamorphosis is indeed a characteristic feature, but still it cannot be the main one - after all, its similarity, sometimes quite close, exists in some proboscids, and, in addition, Holometabola usually includes myomantids, evidence of complete metamorphosis in which is not found.

Polyphyletic then it is from what pies? A huge paraphyletic taxon, and even better to say that it is a grad.