Basic info | Taxonomic history | Classification | Relationships |
Morphology | Ecology and taphonomy | Age range and collections |
Alaskadiscus
Trilobita - Agnostida - Yukoniidae
Taxonomy
Alaskadiscus was named by Zhang (1980) [Sepkoski's age data: Cm l]. It is not extant.
It was assigned to Yukoniidae by Whittington et al. (1997); and to Agnostida by Sepkoski (2002).
It was assigned to Yukoniidae by Whittington et al. (1997); and to Agnostida by Sepkoski (2002).
Synonymy list
Year | Name and author |
---|---|
1980 | Alaskadiscus Zhang |
1997 | Alaskadiscus Whittington et al. p. 399 |
2002 | Alaskadiscus Sepkoski, Jr. |
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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.
Diagnosis
No diagnoses are available