|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Hyolithida - Carinolithidae
It was assigned to Hyolithida by Sepkoski (2002); to Hyolithidae by Fisher (1962) and Kruse (2002); and to Carinolithidae by Valent et al. (2011).
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.
|M. Valent et al. 2011||Hyolithid having prominent, narrow, high ridge in the centre of dorsum, with flanks adjacent to it dipping steeply to forma lateral furrow near each edge of the dorsum, and then grading into a low, narrow longitudinal ridge with a broadly rounded surface on each side of the dorsum. Lateral edges are weakly developed and almost rounded. Operculum platyclaviculate (from Berg-Madsen and Malinky 1999).|