Margaretia

Margaretia is a frondose organism known from the middle Cambrian Burgess Shale and the Kinzers Formation of Pennsylvania.^[1] Its fronds reached about 10 cm in length and are peppered with a range of length-parallel oval holes. It was originally interpreted as an alcyonarian coral.^[2] It was later reclassified as a green alga closely resembling modern Caulerpa by D.F. Satterthwait in her Ph.D. thesis in 1976,^[3] a finding supported by Conway Morris and Robison in 1988.^[2] More recently, it has been treated as an organic tube, that is used as nest of hemichordate Oesia.^[4]

Genus:†Margaretia
Walcott, 1931

Species:

†M. dorus

Quick facts Scientific classification, Binomial name ...

Margaretia Temporal range: Middle Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
M. dorus fossil
Scientific classification
Domain:	incertae sedis
Genus:	†Margaretia Walcott, 1931
Species:	†M. dorus
Binomial name
†Margaretia dorus Walcott, 1931

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