|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
It was assigned to Problematica by Sepkoski (2002) and Bambach et al. (2007); and to Nectocarididae by Conway Morris (1976), Smith and Caron (2010) and Smith (2013).
|Year||Name and author|
|1976||Nectocaris Conway Morris|
|1999||Petalium Luo and Hu|
|2002||Nectocaris Sepkoski, Jr.|
|2002||Vetustovermis Sepkoski, Jr.|
|2005||Vetustovermis Chen et al. p. 2007|
|2007||Nectocaris Bambach et al. p. S83|
|2010||Nectocaris Smith and Caron pp. 469 - 471|
|2010||Petalilium Smith and Caron p. 469|
|2010||Vetustovermis Smith and Caron p. 469|
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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.
|M. R. Smith 2013||Dorsoventrally flattened, non-segmented, torpedo-shaped body with no mineralized skeletal components. Small head bearing a pair of eyes on short stalks and two flexible anterior tentacles. Symmetrical denticulate chevrons posterior of mouth. Hollow funnel extruding from the ventral surface of a short neck and becoming broader as it enters a large, open axial cavity that contains paired gills. Robust serially repeated internal elements concentrically surrounding lateral sides of axial cavity. Fine superficial striations spanning lateral fins.|