|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Trilobita - Phacopida - Cheiruridae
It was reranked as Cheirurus (Pseudosphaerexochus) by Schmidt (1881); it was reranked as Pseudosphaerexochus by Nikolaisen (1965), Owen and Bruton (1980), Owen (1981) and Kielan-Jaworowska et al. (1991).
It was assigned to Cheirurus by Schmidt (1881); to Cyrtometopinae by Nikolaisen (1965); to Eccoptochilinae by Owen and Bruton (1980), Owen (1981) and Kielan-Jaworowska et al. (1991); to Phacopida by Sepkoski (2002); to Cheiruridae by Jell and Adrain (2003); and to Sphaerexochinae by Gapp et al. (2012).
|Year||Name and author|
|1881||Cheirurus (Pseudosphaerexochus) Schmidt pp. 170 - 171|
|1980||Pseudosphaerexochus Owen and Bruton|
|1991||Pseudosphaerexochus Kielan-Jaworowska et al.|
|1997||Mayopyge Adrain and Fortey p. 95|
|2002||Pseudosphaerexochus Sepkoski, Jr.|
|2003||Parasphaerexochus Jell and Adrain p. 422|
|2003||Pseudosphaerexochus Jell and Adrain p. 435|
|2003||Skelipyx Jell and Adrain p. 446|
|2012||Pseudosphaerexochus Gapp et al. p. e49115|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.