|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Cephalopoda - Ceratitida - Xenodiscidae
It was recombined as Tompophiceras extremum by Tozer (1969) and Tozer (1994).
|Year||Name and author|
|1935||Glyptophiceras subextremum Spath p. 56 figs. Pl 5, fig 6; pl 6, fig 4|
|1935||Glyptophiceras extremum Spath p. 57 figs. Pl 11, fig 4; pl 18, fig 4; pl 19, figs 7a-c|
|1969||Tompophiceras extremum Tozer p. 353 figs. Pl 16, figs g-j|
|1994||Tompophiceras extremum Tozer p. 49 figs. Pl 3, figs 1-6|
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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.