| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Vjalovognathidae
Taxonomy
Vjalovognathidae was named by Yuan et al. (2016).
It was assigned to Ozarkodinida by Yuan et al. (2016).
It was assigned to Ozarkodinida by Yuan et al. (2016).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Vjalovognathidae Yuan et al. pp. 371 - 372 |
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.
Fm. †Vjalovognathidae Yuan et al. 2016
show all | hide all
G. †Vjalovognathus Kozur 1977
hide
†Vjalovognathus nicolli Yuan et al. 2016
†Vjalovognathus shindyensis Kozur and Mostler 1976
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D.-X. Yuan et al. 2016 | Vjalovognathidae fam. nov. has an octomembrate apparatus. Segminiscaphate P1 element has a terminal cusp, an inconspicuous free blade and a very thinwalled basal cavity. Cusp is strongly inclined posteriorly. Base of cusp is expanded and not filled. Cavity is large, extends throughout the aboral surface of the platform with a pit under the cusp. Basal cavity and eroded cross of denticles ornamented with fine growth striae. Denticle tips on much of the carina are usually eroded and their tops are flattened off, apparently while the elements were still part of the living animal. Denticles near the anterior of the element have a normally preserved pointed tip. Anterior process of anguliscaphate P2 is bent inward. Cross section of cusp is triangle-shaped. Base of cusp is expanded. However, other parts of basal cavity are closed. M element is makellate. S0 and S3 elements have not yet been recognized. S1 and S2 elements are bipennate. ?S4 element is digyrate. All S elements have thin-walled basal cavity. The poorly preserved S elements generally conform to the octomembrate apparatus. However, they need further research based on complete sets of apparatuses. |
Measurements
No measurements are available
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: c = class | |||||
| Reference: Aberhan 1992 | |||||
Collections
No collection or age range data are available