Totucavum

Totucavum includes all airbulbs that are almost completely composed of their central cavity.

Domain: Eukaryota
 * Kingdom: Crocusiophyta
 * Phylum: Aaurumphyta
 * Class: Cavugarland
 * Order: Aerovesicae
 * Family: Protoaerovesicae
 * Aerobrevis brevis