Class of crustacea - malacostraca, Biology

Class of Crustacea - Malacostraca

Malacostraca involves most of the larger forms such as crabs, lobsters, shrimps etc. and constitute the majority of crustacean species. The cephalic region is formed by using the fusion of five segments; the trunk region contains five thoracic and six abdominal segments. Additionally, a postabdominal telson forms part of the tail fin. A carapace that is covering the thorax may or may not be present. The thoracic appendages called pereopods or walking legs have well developed endopodite employed for crawling and prehension. The thoracic legs have gills, generally modified epipodites. In many malacostracans, first pair of thoracic appendages are modified into maxillipeds employed for feeding. The first five pairs of abdominal appendages called pleopods are the swimming legs. Besides swimming, they may also be used for burrowing carrying eggs in females and frequently for gas exchange. In males the first pair of abdominal appendages are changed as copulatory organs.

Posted Date: 2/4/2013 12:14:49 AM | Location : United States







Related Discussions:- Class of crustacea - malacostraca, Assignment Help, Ask Question on Class of crustacea - malacostraca, Get Answer, Expert's Help, Class of crustacea - malacostraca Discussions

Write discussion on Class of crustacea - malacostraca
Your posts are moderated
Related Questions
Q. What are the so-called "good" and "bad" cholesterol? Lipoproteins are complexes made of lipids (cholesterol and triglycerides) and proteins. The lipoproteins present differe

How do i use the factor-label method to calculate the number of grams of KMnO4 that you would need to make 100 ml of a 0.0045 M potassium permanganate solution? Be sure to show all

A person is declared to be dead upon the irreversible cessation of spontaneous body functions; brain activity, or blood circulation and respiration. However, only about 1% of a per


Open or Blunderbuss Apex or divergent roots The mechanical cleaning & shaping of teeth with blunderbuss canal apex are very difficult if not impossibly orthogratly due to 1

Q. What are the major characteristics of the bryophytes? Bryophytes are nonvascular plants that is they do not have conductive tissues and they perform transport of nutrients a

explain the genotypes for each blood type and how this is an example of codominance. Blood type- A, AB, B, 0

Q. Learning objectives of metabolic diseases? • enumerate the etiological factors and symptoms of gout and few inborn errors of metabolism, • describe the metabolic changes

is paper broken down by microorganisms

Liverworts and mosses are characterized by their lack of vascular conducting tissue. These two groups of liverwort, plants and mosses, are known by which of the below terms: a)