Kingdom Animalia Class Trilobita Suborder Phacopina Rank Genus | Phylum Arthropoda Order Phacopida Superfamily Acastoidea | |
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Acastava is an extinct genus of trilobite in the order Phacopida, from the upper Pragian (A. atavus) to Emsian period (both other species listed) of the Devonian.
References
Acastava Wikipedia(Text) CC BY-SA