|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Polyplacophora - Mattheviidae
It was assigned to Hemithecellidae by Stinchcomb and Darrough (1995); to Paleoloricata by Sepkoski (2002); and to Mattheviidae by Runnegar et al. (1979) and Pojeta et al. (2010).
|Year||Name and author|
|1979||Hemithecella Runnegar et al. p. 1389|
|1995||Elongata Stinchcomb and Darrough|
|1995||Hemithecella Stinchcomb and Darrough p. 58|
|1995||Elongata Stinchcomb and Darrough p. 62|
|2002||Elongata Sepkoski, Jr.|
|2002||Hemithecella Sepkoski, Jr.|
|2010||Hemithecella Pojeta et al. p. 8|
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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.
|B. Runnegar et al. 1979||Relatively large chiton with body valves like those of Chelodes except that each may have a sizeable hole (muscle insertion?) beneath the posterior edge of the plate (Pl. 1, fig. 32); head and tail valves unknown.|