Cooper, G. A.; Grant, R. E. (1976). Permian Brachiopods from West Texas, IV. <em>Smithsonian Contributions to Paleobiology.</em> 21: 1923-2607.[details]
Traits (2024). Petasmatherus pumilus Cooper & Grant, 1976 †. Accessed at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1716234 on 2024-10-02
Marine Species Traits editorial board (2024). Marine Species Traits. Petasmatherus pumilus Cooper & Grant, 1976 †. Accessed at: https://marinespecies.org/traits./aphia.php?p=taxdetails&id=1716234 on 2024-10-02
original descriptionCooper, G. A.; Grant, R. E. (1976). Permian Brachiopods from West Texas, IV. <em>Smithsonian Contributions to Paleobiology.</em> 21: 1923-2607.[details]