In Herdmania blood vascular system is well developed and it has all of the components of an ideal blood vascular system, a heart with pericardium, blood, and blood vessels. Pericardium: It is a transparent hollow tubular structure present below the right gonad and is around 7 to 8 cm long and present obliquely. It is … Read more
In this post, we will focus on the digestive system of Herdmania, part of the digestive system, alimentary canal and digestive glands in the digestive system of Herdmania, feeding mechanism of Herdmania. Alimentary Canal of Herdmania: The digestive tract in Herdmania is complete, starting at the mouth opening and ending at the anus opening and … Read more
In Herdmania the visceral organs are protected through different layers, on the outer side the body of Herdmania is covered by a tunic or test, below the tunic mantle is present, the mantle secret the tunic layer. Mantle: The mantle is a living covering of the visceral organs in Herdmania which present just below the … Read more
Test or Tunic is the outer covering of Herdmania which gives them protection against external mechanical injuries and it has several wrinkles on the outer surface. In young Herdmania the tunic is transparent, with the age it becomes much thicker and become opaque. Tests do not only give protection, they also act as respiratory surface … 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
What is Herdmania: They are marine sessile animals that live in all parts of the world, in coastal areas as well as in the deep ocean. Herdmania is a sea squirt also known as Ascidian they are members of subphylum Urochordata or Tunicata. Systematic Position of Herdmania: Herdmania is a genus under family pyuridae, under … 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