Archaeonassa

Late Ediacaran Archaeonassa-type trace fossils are commonly preserved on the top surfaces of sandstone strata. ^[1] "Archaeonassa is a poorly known ichnogenus, originally described from the Cambrian of North America, which is a member of the Scolicia ’group’, but can be regarded as distinct from Scolicia"^[2] Its know for being produced by invertebrates like arthropods and mollusks. Archaeonassa are a certain type of Cambrian trace fossil and are also shown as burrows. They are twisted about and are irregular in form.^[3] "The flanking ridges are very well developed, and locally display an undulating morphology. In cross-sectional view the median groove commonly displays a V-shaped morphology."^[1] They were origanlly compared to a base model but scientist found that they fell into a "taxonomic grey zone concerning its availability"^[4]

^ ^a ^b "Archaeonassa fossulata". fossiilid.info. Retrieved 2019-12-02.
^ Buckman, James Oliver (February 1994). "Fenton and Fenton 1937 Reviewed". Research Gate.{{cite web}}: CS1 maint: url-status (link)
^ Fenton, Carroll Lane; Fenton, Mildred Adams (1937). "Archaeonassa: Cambrian Snail Trails and Burrows". The American Midland Naturalist. 18 (3): 454–456. doi:10.2307/2420587. ISSN 0003-0031.
^ "Archaeonassa Fenton and Fenton 1937 reviewed". Taylor Francis Online. December 7th, 2008. {{cite web}}: Check date values in: |date= (help)CS1 maint: url-status (link)

[:0-1] "Archaeonassa fossulata". fossiilid.info. Retrieved 2019-12-02.

[2] Buckman, James Oliver (February 1994). "Fenton and Fenton 1937 Reviewed". Research Gate.{{cite web}}: CS1 maint: url-status (link)

[3] Fenton, Carroll Lane; Fenton, Mildred Adams (1937). "Archaeonassa: Cambrian Snail Trails and Burrows". The American Midland Naturalist. 18 (3): 454–456. doi:10.2307/2420587. ISSN 0003-0031.

[4] "Archaeonassa Fenton and Fenton 1937 reviewed". Taylor Francis Online. December 7th, 2008. {{cite web}}: Check date values in: |date= (help)CS1 maint: url-status (link)

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