Ostracoda General Characters (Phylum: Arthropoda, Sub-phylum: Crustacea)

General Characters of Ostracoda

Ostracod Crustacean (Wikipedia)

Systematic Position:

Kingdom: Animalia
Sub-kingdom: Eumetazoa
Super-phylum: Ecdysosoa
Phylum: Arthropoda
Sub-phylum: Crustacea
Class 5 : Ostracoda

General Characters of Ostracoda:

Ø  Commonly called as seed shrimps

Ø  Small crustaceans

Ø  They are the common zooplanktons of marine environment

Ø  Flattened body plan

Ø  Body is covered by bivalve like shell

Ø  Shell may be chitinous or calcareous

Ø  Body consists of head and thorax

Ø  Head and thorax separated by a small constriction

Ø  Abdomen usually absent

Ø  Clear body segmentation absent

Ø  Head is the largest body segment

Ø  Bears well developed antennae

Ø  Antennae are used to swim in the water

Ø  A pair of mandibles and two pairs of maxillae present

Ø  Thorax with two pair of appendages

Ø  Gills absent

Ø  Heart and circulatory system absent

Ø  Eyes usually present which may be simple or compound eyes

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