Nota de aplicación
Group of marine animals characterized by having at some point in their life cycle a hollow dorsal nerve cord, a notochord, and gill slits, including hemichordates, urochordates, cephalochordates, or any hypothetical ancestral form of any of these. The protochordates lack a skull and vertebrae and are believed to resemble the ancestors of the vertebrates. They include the subphylums of Tunicata and Cephalochordata.
Ubicación jerarquía
- faceta agentes
- .. organismo vivo (nombre jerárquico)
- .... organismo vivo (entidad)
- ...... Eucariota (dominio)
- ........ animal (reino)
- .......... Chordata (phylum)
- ............ cefalocordado (subfolo) [+]
- ............ Tunicado (subfilo) [+]
- ............ vertebrado (filo) [+]
- ............ Protochordata (group)