Librostoma

== Translingual == === Alternative forms === Libristoma === Etymology === From Latin liber (“free”) +‎ -stoma. === Proper noun === †Librostoma A taxonomic subclass within the class Trilobita – some of the trilobites. ==== Hypernyms ==== (subclass): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Protostomia – infrakingdom; Ecdysozoa – superphylum; Arthropoda – phylum; †Trilobita - class ==== Hyponyms ==== (subclass): †Asaphida, †Harpetida, †Proetida, †Ptychopariida - orders === References === Librostoma on Wikipedia.Wikipedia Trilobita on Wikispecies.Wikispecies Category:Trilobita on Wikimedia Commons.Wikimedia Commons “Libristoma”, in Paleobiology Database, 2026