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Lithostraca (lit. "stone shells") comprise modern marine Tentaclostoma.

DescriptionEdit

Lithostracans comprise the species of Tentaclostomes that have remained fully aquatic into the present day, in contrast to its sister clade Neostoma.

Lithostraca itself is split into two clades: Eulithostraca and Anostraca.

Evolutionary Tree
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