Question

Explain the structure and types of pedicellaria​

Answer 1

Answer:

Four main forms of pedicellariae are found in sea urchins : tridactylous, ophicephalous, triphyllous and globiferous. There are typically three valves that make up the jaw of sea urchin pedicellaria. The stalk is composed of a skeletal rod and a flexible neck portion.

Explanation:

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Answer 2

Answer:

A pedicellaria (plural: pedicellariae) is a small wrench- or claw-shaped appendage with movable jaws, called valves, commonly found on echinoderms (phylum Echinodermata), particularly in sea stars (class Asteroidea) and sea urchins (class Echinoidea).Types. Four main forms of pedicellariae are found in sea urchins : tridactylous, ophicephalous, triphyllous and globiferous. There are typically three valves that make up the jaw of sea urchin pedicellaria. The stalk is composed of a skeletal rod and a flexible neck portion.

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