If that happens, an ingroup species with a long branch may move to a more basal position in the tree.

This may simply reflect their basal position in the crab phylogeny.

A few genera, mostly fossil, are of more uncertain or basal position.

Vectidraco was assigned to the Azhdarchoidea, in a basal position.

Studies using genetic data have also supported a basal position for this species.

They occupy a fairly basal position among the Eugongylus group.

These insects are also of interest due to their presumed basal position in the order Mecoptera.

Some additional genera are of unresolved or quite basal position.

This group probably has a basal position within the subfamily.

This fish probably has a basal position in the subfamily Hypoptopomatinae.