Live in Marine Environment: Members of the subphylum Urochordata generally live in marine environments and in almost all parts of the world they are observed. Urochordata lives in all depths of the ocean, shallow coastal areas as well as deep oceans. They are Sedentary As Well As Pelagic: Most of the Urochordata are fixed at … Read more
What is Herdmania: Herdmania is a marine animal that generally lives at the bottom of the ocean floor, remains in a sessile state. Herdmania is like a pouch due to its wrinkled outer covering or test. Systematic Position of Herdmania: In the animal kingdom when we try to place Herdmania we face difficulties due to … Read more
Affinities of Herdmania with Non-chordate: Like porifera and coelenterata Urochordata are sessile live in marine environment. Larval eyes and otocysts present in Urochordata show great similarity with some invertebrates. In Herdmania intestine have typhlosole which also present in some other invertebrates. Herdmania sometimes live in colonial form which shows great resemblance with some other invertebrates. … Read more
Herdmania is a hermaphrodite animal, with both the male reproductive system and the female reproductive system present in each individual animal. But male and female gametes do not become mature simultaneously, Herdmania is protogynous so only one individual Herdmania is not able to reproduce, self-fertilization is not possible, two partners are required for fertilization. Reproductive … Read more
Excretory System of Herdmania: In Herdmania primary excretory organ is the neural gland, it is an elliptical brownish gland present above the nerve ganglion. The neural gland is present at the mid-region between the atrial siphon and branchial siphon, this gland has several branches. Through the entire length of the gland, a longitudinal canal run,s … Read more
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