In this article we will discuss about Phylum Chordata:- 1. Meaning of Phylum Chordata 2. Important Features of Phylum Chordata 3. Non-Chordates 4. Ancestry 5. Outline Classification. Contents: Meaning of Phylum Chordata Important Features of Phylum Chordata Chordate Features Shared by the Non-Chordates Ancestry of Phylum Chordata Outline Classification of Phylum Chordata 1. Meaning of Phylum Chordata: The Phylum Chordata [...]
The upcoming discussion will update you about the difference between stomochord and notochord. Difference # Stomochord: 1. The stomochord arises as an out pocketing from the roof of the embryonic gut, anterior to the pharynx. 2. Endodermal derivative. 3. It has a narrow lumen, opening into the pharynx. 4. The wall of the lumen is composed of a single layer [...]
In this article we will discuss about the meaning and classification of phylum hemichordata. Meaning of Phylum Hemichordata: The animals with notochord constitute the Phylum Chordata. It has a major subdivision, called the Vertebrata or Craniata for possession of vertebral column or cranium. The rest of chordates, namely Hemichordata, Urochordata and Cephalochordata are collectively called the Primitive Chordates or Protochordates. [...]