As some lineages of the 90 % of species that lack a backbone or notochord might have lost these structures over time, this complicates the classification of Chordata.
22.
The Phylogeny for the Mexican Ground Squirrel is as follows : Phylum Chordata, Class : Mammalia, Order : Rodentia, Family : Sciuridae, Genus : Spermophilus.
23.
""'Chlanidota chordata " "'is a species of sea snail, a marine gastropod mollusk in the family Buccinidae, the true whelks.
24.
Usually the term is taken to refer to tagmata in the morphology of members of the phylum Arthropoda, but it applies equally validly in other phyla, such as the Chordata.
25.
In 2005, after pursuing other projects ( including " Primordial Blues " ) and solo projects, Dali s Llama released a fifth CD, " Chordata ".
26.
In it she developed her scientific theory that the Phylum Chordata, including all vertebrates, was evolutionarily related to the apparently very different and very much more primitive Echinodermata, such as starfish.
27.
Sexual reproduction exists outside of phylum Chordata and presumably predates it, so one might as easily discover that the development of a spine was an elaboration on some proto-tubeworm's reproductive system.
28.
As one group of the class Mammalia, all of the above are classified among those with backbones in the Chordata phylum rank, and with them among all the animals in the Animalia kingdom rank.
29.
The taxa parameters like regnum, classis, etc . are for a taxon which includes all of the organisms in the paraphyletic group ( for example chordata or tetrapoda in an article for reptile ).
30.
Taxonomists place lampreys and hagfish in the subphylum Vertebrata of the phylum Chordata, which also includes the invertebrate subphyla Tunicata ( sea-squirts ) and the fish-like Cephalochordata ( lancelets or Amphioxus ).
