411 REFERENCE · Wiktionary
Acrania
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
acrania
Translingual
Proper noun
mul zoology obsolete A class of Vertebrata subphylum including Branchiostoma genus (syn. Amphioxus genus), in which no skull exists.
Synonyms
zoology Myelozoa class, Leptocardia class, Acephala class
References
mul Taxonomic names (class) Taxonomic names (obsolete)