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Hemitrochiscus
Taxonomy
Hemitrochiscus was named by von Schauroth (1854) [Sepkoski's age data: P Guad].
It was assigned to Cyclida by Sepkoski (2002); and to Hemitrochiscidae by Glaessner (1969) and Schweitzer et al. (2020).
It was assigned to Cyclida by Sepkoski (2002); and to Hemitrochiscidae by Glaessner (1969) and Schweitzer et al. (2020).
Species
Synonymy list
Year | Name and author |
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1854 | Hemitrochiscus von Schauroth p. 558 |
1969 | Hemitrochiscus Glaessner p. 569 |
2002 | Hemitrochiscus Sepkoski |
2020 | Hemitrochiscus Schweitzer et al. p. 278 |
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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.
G. †Hemitrochiscus von Schauroth 1854
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†Hemitrochiscus paradoxus von Schauroth 1854
Diagnosis
Reference | Diagnosis | |
---|---|---|
C. E. Schweitzer et al. 2020 | Carapace semi-circular, strongly domed, optic notches deep; vermiform lines on posterolateral margins of carapace; thoracic somites visible ventrally and laterally where carapace is broken. |