News at the base of the Tetrapoda

Adding four basal tetrapod taxa
to the large reptile tree (LRT, 924 taxa) brings new insights into temnospondyl relationships (Fig. 1). Looks like they had a separate origin with Acanthostega. Meanwhile, Ichthyostega is basal to lepospondyls, reptiles and their kin.

Figure 1. Subset of the LRT focusing on basal tetrapods with the addition of Osteolepis, Acanthostega, Tiktaalik and a Seymouria juvenile.

Figure 1. Subset of the LRT focusing on basal tetrapods with the addition of Osteolepis, Acanthostega, Tiktaalik and a Seymouria juvenile.

Certainly more taxa
will add branches to this tree topology. But for now, this is it.

 

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