Osmolskina – a basal ornithosuchid

Figure 1. Osmolskina was a euparkeriid that was basal to the ornithosuchids, Ornithosuchus and Riojasuchus. Note the scale bars.

Figure 1. Osmolskina was a euparkeriid basal to the ornithosuchids, Ornithosuchus and Riojasuchus. Note the scale bars. Osmolskina was quite tiny relative to its descendants.

Ornithosuchids are often just a footnote.
Only three taxa are known, Ornithosuchus, Venaticosuchus and Riojasuchus (Fig. 1). And nobody pays much attention to them because they’re, frankly, off the beaten track.

Now,
thanks to phylogenetic analysis (and the large reptile tree) we can add one more, the much smaller basal form, Osmolskina. Sure it doesn’t have all the traits of the classic ornithosuchids, but among the 378 taxa now included, no others come closer.

References
Borsuk-Bialynicka M and Evans SE 2009. Cranial and mandibular osteology of the Early Triassic archosauriform Osmolskina czatkowicensis from Poland. Palaeontologia Polonica 65, 235–281.

 

 

 

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s