ecofactbook
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species
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Animalia
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Arthropoda
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Trilobita
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Ptychopariida
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Ptychopariidae
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Elrathina
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Elrathina antiqua
Elrathina brevifrons
Elrathina convexa
Elrathina cordillerae
Elrathina erecta
Elrathina fecunda
Elrathina hybrida
Elrathina lickensis
Elrathina marginalis
Elrathina nodulosa
Elrathina oculineata
Elrathina offula
Elrathina parallela
Elrathina spinifera
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Elrathina antiqua