Gasparinisaura would be the basalmost member of this group.

Heterodontosauridae has been shown to be the basalmost group within Ornithischia.

Concordia was originally thought to be the basalmost known member of Captorhinidae.

However, many recent cladistic analyses found it to be the basalmost member of the Ophthalmosauridae.

The basalmost postmedian line is straight and merges with the longitudinal band.

Turner and Calvo found their new genus to be the basalmost sebecosuchian.

Phylogenetically, Lorosuchus is currently recognized as the basalmost known sebecid.

Eoabelisaurus was assigned to the Abelisauridae by its describers, in the basalmost position.

A phylogenetic analysis performed by Benson et al. (2012) found it to be the basalmost known plesiosauroid.

As one of the earliest and basalmost sauropods, it is important for understanding the early evolution of this group.

C. falconensis was named in 2013 and it is thought to be the basalmost known Neotropical crocodile species.

The centre of this group's radiation is probably in the eastern Mediterranean region, and the southern grey shrike represents the basalmost form.

It is one of the earliest representatives of the armored dinosaurs and the basalmost form discovered to date.

It is the basalmost known tetrapodomorph.

According to a phylogenetic analysis conducted along with its initial description, Raranimus is considered to be the basalmost therapsid.

It was the basalmost ornithomimosaur.

H. garnettensis is currently the basalmost sphenacodontian.

The most recent phylogenic study of primitive reptile relationships found Coelostegus to be the basalmost known eureptile.

Nigersaurus was the basalmost member of this "Euro-African" subclade.

The basalmost ones are up to 12 mm long, whereas those higher up the rachis reach only 6 mm.

They are the basalmost living tribe of the Riodininae, outside the main radiation together with the slightly more advanced Eurybiini.

The Rhabdodontidae are a group of ornithopod dinosaurs, more specifically some of the basalmost iguanodonts.

Stratesaurus is a small-bodied rhomaleosaurid with five basalmost rhomaleosaurid.

A cladistic analysis found it to be the basalmost known caviomorph, and one of the oldest (the other being Cachiyacuy from the same locality).

A new phylogenetic analysis performed by Thompson et al., 2011 suggests that Antarctopelta is the basalmost known nodosaurid.