- Acernaspis
"Acernaspis" is an extinct genus of
Trilobite . It contains two species, "A. elliptifrons", and "A. salmoensis".External links
* [http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=21429&is_real_user=0 "Acernaspis"] at the
Paleobiology Database
Wikimedia Foundation. 2010.