| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Costipelagiella nevadense
Taxonomy
Costipelagiella nevadense was named by Skovsted (2006). Its type specimen is USNM 530271, a shell, and it is not a trace fossil. Its type locality is CS990917-01, which is in a Dyeran offshore shelf limestone in the Emigrant Formation of Nevada.
Synonymy list
| Year | Name and author |
|---|---|
| 2006 | Costipelagiella nevadense Skovsted p. 491 fig. 2F–2J |
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.
†Costipelagiella nevadense Skovsted 2006
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. B. Skovsted 2006 | Species of Costipelagiella with spiral side flat and an oval cross section of the last whorl. External ornament of gently curved fold-like ribs on both sides of the smooth dor- sum.
Small, dextral shells, coiled through about one whorl. The spiral side is nearly flat, and the umbilical side is more strongly convex. The cross section of the whorl is oval. The suture separating the last whorl from the apex is a deep, narrow furrow. The protoconch is globose, smooth, and delineated by a distinct furrow. The aperture is not pre- served in any of the available specimens. Both the spiral and umbilical sides are ornamented by closely spaced (average density 43 ribs/mm), fold-like ribs and intervening narrow grooves that seemingly run parallel to the aperture. Close to the smooth dorsum the ribs curve slightly towards the apex and become progressively subdued. Co-occurring internal molds have unornamented surfaces. All specimens exhibit traces of the activity of endolithic alga, either as hollow, vermiform borings through the shell (Fig. 2I, top of specimen) or as narrow undulating molds of bacterial strands on internal molds (Fig. 2F). |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
| Source: o = order, c = class | |||||
| Reference: Hendy et al. 2009 | |||||