| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Bicarinellata evansi
Taxonomy
Bicarinella evansi was named by Rode et al. (2003) [Late Cambrian (Atdabanian or Botomian); Antarctica - NOT Bicarinella (Gastropoda)]. Its type specimen is KUMIP #303504 and is not a trace fossil. It is the type species of Bicarinella, Bicarinella, Bicarinellata.
It was recombined as Bicarinellata evansi by Stigall (2008).
It was recombined as Bicarinellata evansi by Stigall (2008).
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Bicarinella evansi Rode et al. pp. 694-696 figs. 2, 3, 4, 5, 6 |
| 2008 | Bicarinellata evansi Stigall |
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.
†Bicarinellata evansi Rode et al. 2003
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. L. Rode et al. 2003 | Carapace small, average length 1.3 mm and maximum observed 1.6 mm. Carapace outline subtriangular with retral swing and well-developed marginal rim. Hinge line straight and simple with no articulating structures observed. Posterior margin of carapace rounded with obtuse posterior cardinal corner. Anterior margin of carapace slightly acuminate with less obtuse cardinal angle than posterior margin. Valve height generally greater than width.
Both anterior and posterior lobes well developed and may extend up to one-third carapace length. Anterior lobe directed posteroventrally and elongated into sharp ridge that may increase posteriorly in relief and may terminate posteriorly in node; borders of ridge well defined. Posterior lobe directed anteroventrally and resembles anterior lobe in relief and definition (though some individuals lack node-like swelling). Increased convexity and distinct low node occur in dorsal region between anterior and posterior ridges. Dorsal node may be diffuse or well defined. Three types of micro-ornamentation are present on the exterior of the carapace: pustules best developed around lateral part of carapace, fine pitting more common in central and dorsal regions of adult carapaces, and reticulate pattern throughout carapace. |