Primary Excretory Organ: In Hemichordata the proboscis gland or glomerulus is present inside the proboscis coelom, at the anterior portion of the buccal in the Urochordata on the dorsal side of the body above the nerve ganglion the neural gland take part in collecting the nitrogenous excretory material. In Cephaochordata excretion occur through the protonephridia, … Read more
Alimentary Canal: The alimentary canal in Hemichordata is straight, complete starting in mouth opening and an end in the anus, the alimentary canal in Hemichordata is much narrow. In Urochordata the alimentary canal is complete but it is not simple, it is not straight, intestine forms a loop, due to the presence of the intestinal … Read more
The members of Protochordata are divided into three subphyla based on their notochord, Subphylum Cephalochordata, Subphylum Urochordata, and Subphylum Hemichordata. Habits and Habitats: Members of Hemichordata generally live inside the burrow made in sand or mud in the solitary or colonial states. Members of subphylum Urochordata may be a sedentary or free-swimming line in the … Read more
Herdmania is a member of the subphylum Urochordata, lives in a marine environment also known as sea squirt or Ascidian. Now we will discuss the body shape of Herdmania, size of Herdmania, the coloration of Herdmania, and external morphology of Herdmania. The shape of Herdmania: Herdmania somewhat looks like a potato or purse bag, on … Read more
Hemichordata is a small group of animals, having around 80 species of soft-bodied animals and they are exclusively marine and show great power of regeneration. We will discuss the general characteristics features of the subphylum Hemichordata, their classification, and examples. Characteristics Features of Hemichordata: They live in marine environment, they can live in colonial form … Read more
We have discussed various aspects of Balanoglossus as an example of Hemichordata, now we are going to discuss more examples of Hemichordata. Rhabdopleura: Rhabdopleura is marine Hemichordate under the class of Pterobranch, they live in the colonial form in gelatinous tubes and from coenobium. The zooids of their colony linked to each other through a … Read more
Hemichordata include soft-bodied vermiform invertebrates and they are small groups of animals which have around 80 species, subphylum Hemichordata can be divided into several classes based on their characteristics — Class.1: Enteropneusta: The term Enteropneusta is related to Greek words Enteron and Pneusta, the word Enteron refers to gut and the word Pneusta refers to … Read more
Hemichordata is a subphylum under phylum Chordata, the term Hemichordata is related to two words, Hemi means half, and cord represents notochord. So Hemichordata contains those animals who do not have a notochord throughout the length of the body. Hemichordata is the most primitive Chordata and we will discuss all the general characteristics features of … Read more