Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of thoracostraca is as below...

Telson :: Telson (n.) The terminal joint or movable piece at the end of the abdomen of Crustacea and other articulates. See Thoracostraca.

Malacostraca :: Malacostraca (n. pl.) A subclass of Crustacea, including Arthrostraca and Thoracostraca, or all those higher than the Entomostraca..

Thoracostraca :: Thoracostraca (a.) An extensive division of Crustacea, having a dorsal shield or carapec/ //niting all, or nearly all, of the thoracic somites to the head. It includes the crabs, lobsters, shrimps, and similar species..

Schizopoda :: Schizopoda (n. pl.) A division of shrimplike Thoracostraca in which each of the thoracic legs has a long fringed upper branch (exopodite) for swimming.

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