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Pharostoma obtusum

Trilobita - Phacopida - Calymenidae

Taxonomy
Otarion obtusum was named by McCoy (1846).

It was corrected as Otarion obtusa by McCoy (1846); it was recombined as Pharostoma obtusum by Warburg (1925); it was recombined as Prionocheilus obtusus by Owen and Bruton (1980).

Sister species lacking formal opinion data