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Class: Echinoidea
Order: Spatangoida
Family: Hemiasteridae
Common: None
Genus List: Hemiaster
Formation List: Austin Chalk, Boquillas
Age List: Santonian Coniacian, Turonian Coniacian
Formation: Boquillas
Val Verde County | wtexas956
Age: Turonian Coniacian
Formation: Austin Chalk
Williamson County | W1-774
Age: Santonian Coniacian
Formation: Austin Chalk
Travis County | W1-511
Age: Santonian Coniacian
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