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RE: the Eurypoda and Thyreophoroidea fall into
Lida Xing wrote-
I want to know what were the Eurypoda and Thyreophoroidea(Thyreophora
forms) fall into ? the "Suborder" ?or "Infraorder" ?
Most biologists recognize that ranks such as "suborder" and "infraorder" are
meaningless. There are many posts in the DML Archives dealing with this
subject. These thyreophoran clades are a good example of why it's difficult
to use Linnaean ranks now. According to the Zoological Record, Ornithischia
is an order, and Ankylosauria is a suborder. Below are two possible
topologies for Thyreophora, and their respective taxonomies.
In both examples, we have four ranks between order and suborder that would
need to be named in the Linnaean system. And once we place taxa like
Bienosaurus, Tatisaurus, Emausaurus and others in the topology, we may need
even more. It's best just to not use ranks.
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