Referência bibliográfica
Calvert, P.P. (1913) The fossil Odonate Phenacolestes, with a discussion of the venation of the legion Podagrion Selys. Proceedings of the Academy of Natural Sciences of Philadelphia 63: 225–272.
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Calvert, P.P. (1913) The fossil Odonate Phenacolestes, with a discussion of the venation of the legion Podagrion Selys. Proceedings of the Academy of Natural Sciences of Philadelphia 63: 225–272.