Observations on and emended description of Heteroceras simplicostatum Whitfield. Bulletin of the AMNH ; v. 16, article 5 — latest news, discussion & facts — IJR
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Observations on and emended description of Heteroceras simplicostatum Whitfield. Bulletin of the AMNH ; v. 16, article 5
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Observations on and emended description of Heteroceras simplicostatum Whitfield. Bulletin of the AMNH ; v. 16, article 5
