In this article we will discuss about the classification of phylum chordata with its characters. The chordates form a large heterogeneous group of members differing widely from one another in many respects. Due to great diversity in chordate forms, different schemes of classification have been proposed by a number of taxonomists from time to time. The classification followed is simplified [...]
In this article we will discuss about the classification of phylum chordata. Classification of Phylum Chordata: 1. The chordates are bilaterally symmetrical, triploblastic, coelomate animals. 2. The notochord or chorda dorsalis is present either in the young stage or throughout life. In the higher chordates, this is replaced by a bony vertebral column at a later stage. 3. The wall [...]
In this article we will discuss about the classification of Phylum Chordata. 1. Subphylum and Class Hemichordata: 1. The body is divisible into three regions, a proboscis, a collar and a trunk, the anterior end of which bears gill slits. 2. The nerve cord is dorsal and arises from the ectoderm along the middle line. 3. A notochord is always [...]