Class of crustacea - cirripedia, Biology

Class of Crustacea - Cirripedia

These crustaceans are completely marine, and include the barnacles. Moa species are free living, attached to rock, and other objects. Some are commensals living on whales, fish, turtles and other organisms. Some are parasites. Free living forms are either stalked or sessile. The stalked forms (goose barnacles) measure a few mm to 75 cm in length. Sessile types are a few centimeters long. Stalked forms have a muscular, flexible stalk or peduncle which is attached to the substratum at its lower end and has the main parts of the body, the capitulum, at the other end. The peduncle is the preoral end of the animal and bears the vestiges of the larval first antennae and the cement glands. The secretion of the cement gland is adhesive in nature. The capitulum involves the entire body except the preoral parts. The body is covered by a carapace or the mantle. The mantle is covered through five plates: a posterior dorsal plate carina, a pair of terga and a pair of scuta. Sessile barnacles are attached to the substratum by a membranous or calcareous, basis. This forms the preoral region of the animal and consists of cement glands. The animal is surrounded by a wall of plates and within this wall the animal is covered by an operculum formed by movable terga and scuta.

Posted Date: 2/4/2013 12:13:57 AM | Location : United States







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

Write discussion on Class of crustacea - cirripedia
Your posts are moderated
Related Questions
How to reduce the stresses on the implant i) There is need to reduce the stresses on the implant - ii) Frequent recall for maintenance or hygiene appointments. iii) Gingi

Q. Define Eye Balling? Ans. Two-dimensional echocardiography provides a good visual perception of cardiac functions. With experience, the echocardiologist learns to percei


Explain the Bioavailability of Folate? Bioavailability of folate from naturally occurring food sources is variable and frequently incomplete, as mentioned earlier in the food

Hormon e . The chief cells of the parathyroids secrete a hormone called parathyroid hormone (PTH) or parathormone or also called Collip's hormone after the name of its discove

Protraction from HIV  Under the following conditions HIV is not transmitted 1) The secretions and body fluids like Saliva, Tears, Sweat, Faeces, and Urine have negligible HIV c

Mylohyoid muscle Surgical manipulation at the crest of a severely resorbed ridge may injure the mylohyoid muscle. Manipulation of the tissues of the floor of the mouth for plac

Q. Objective of nutritional management of hypertension? The objective of nutritional management of hypertension includes: • To achieve gradual weight loss in overweight and

give the discriptive account of nerilla which belongs to class arciannelida in phylum annelida

International organization and zoonoses In 1962, the Food and Agriculture Organization and the World Health Organization created the Codex Alimentarius Commission (Codex) to e