Named By: Derek E. G. Briggs & Jean-Bernard Caron - 2017.
Classification: Animalia, Protostomia, Spiralia, Gnathifera, Chaetognatha.
Species: C. praetermissus (type).
Size: About 10 centimetres long.
Known locations: Canada, British Columbia - Burgess Shale.
Time period: Mid Cambrian.
Fossil representation: Almost complete
is a prehistoric form of what we today would call an arrow worm.
Capinatator had a ten centimetre long elongated
body, while around
the head fifty, one centimetre long hooked spines grew
around the edges of a very rudimentary mouth. These spines flared out
so that as Capinatator swam through the water,
and perhaps other floating organic matter, would be snared within
the cage of spines as they closed around them, and taken into the
At ten centimetres long, Capinatator is amongst the largest chaetognathan worms ever discovered, and has nearly double the number of spines in living worms.
- A Large Cambrian Chaetognath with Supernumerary Grasping Spines. - Current Biology. 27 (16). - Derek E. G. Briggs & Jean-Bernard Caron - 2017.