Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Petasotheca
Taxonomy
Petasotheca was named by Landing and Bartowski (1996) [Sepkoski's age data: Cm Boto-u Sepkoski's reference number: 1235].
It was assigned to Orthothecida by Landing and Bartowski (1996); and to Circothecida by Sepkoski (2002).
It was assigned to Orthothecida by Landing and Bartowski (1996); and to Circothecida by Sepkoski (2002).
Species
Synonymy list
Year | Name and author |
---|---|
1996 | Petasotheca Landing and Bartowski p. 757 |
2002 | Petasotheca Sepkoski |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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. †Petasotheca Landing and Bartowski 1996
show all | hide all
†Petasotheca minuta Landing and Bartowski 1996
Diagnosis
Reference | Diagnosis | |
---|---|---|
E. Landing and K.E. Bartowski 1996 | Diagnosis. -0rthothecids with 1) low, circular to elliptical operculum with subcentral apex and clavicles that radiate laterally and fuse to form a high dorsolateral lobe; 2) no cardinal processes; and 3) simple, conoidal conchs with round crosssection.
Description. -Low operculum with slightly elevated, subcentral apex and concentric growth lines; visceral surface depressed at growth center; ridge concentric to the ventral margin increases in height laterally, extends dorsolaterally, and supports a row of clavicles; fused clavicles form a high lobe at dorsal end of the clavicle rows; cardinal processes absent; conchs slightly curved, have round cross-sections and fine, transverse growth lines. |