In this article we will discuss about Phylum Pogonophora:- 1. Taxonomic Retrospect of Phylum Pogonophora 2. Characteristic Features of Phylum Pogonophora 3. Classification 4. Affinities 5. Phylogenetic Relationship. Taxonomic Retrospect of Phylum Pogonophora: 1. The first species of Pogonophore was collected in Indonesia in the year 1900. 2. Uschakov, a Russian Biologist in the year 1933, collected some specimens from [...]
The following points highlight the top three non-segmented coelomate groups. The groups are: 1. Phylum Sipuncula 2. Phylum Echiura 3. Phylum Priapulida. Non-Segmented Coelomate Group # 1. Phylum Sipuncula: Sipunculids: This group includes nearly 2350 species of which the largest is Siphonomecus multicinctus (nearly 51 cm). The other important genera are Sipunculus sp. (Fig. 17.47B), Golfingia sp. and Phascolosoma sp. [...]
The upcoming discussion will update you about the difference between Coelom and Pseduocoelom. Difference # Coelom: 1. Fluid filled perivisceral cavity of most triploblastic animals (e.g., most annelids, echinoderms and vertebrates), situated between the body wall and gut. In arthropods and molluscs, it is not the perivisceral cavity; it forms the cavity of excretory organs and gonads and acts as [...]