''Ikamauius'' is an extinct genus of
sawshark from the
Cenozoic
The Cenozoic ( ; ) is Earth's current geological era, representing the last 66million years of Earth's history. It is characterised by the dominance of mammals, birds and flowering plants, a cooling and drying climate, and the current configura ...
of
New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...
. It contains a single species, ''I. ensifer''. It is most closely related to the extant ''
Pliotrema
The sixgill sawshark, ''Pliotrema warreni'' is a sawshark of the family Pristiophoridae. Presence of 6 pairs of gill slits highlights this genus among sharks; outside Hexanchiformes order, ''Pliotrema'' is the only shark with more than 5 gill s ...
'', but is distinguished by the presence of barbs on both sides of its rostral denticles.
References
Fish of New Zealand
Pristiophoridae
Prehistoric cartilaginous fish genera
{{Shark-stub