Pikaia gracilens

Таксонавигация

Таксонавигация: Chordata
Superregnum: Eukaryota Cladus: Unikonta Cladus: Opisthokonta Cladus: Holozoa Regnum: Animalia Subregnum: Eumetazoa Cladus: Bilateria Cladus: Nephrozoa Superphylum: Deuterostomia Phylum: Chordata

Stem-group Chordata
Genus: †Pikaia
Species: †Pikaia gracilens

Pikaia gracilens Walcott, 1911

Walcott, C.D. 1911. Middle Cambrian annelids. In: Cambrian geology and paleontology. II. Smithsonian Miscellaneous Collections 57: 109–144, pls. 18–23. BHL.