Haootia preserves repeated aligned impressions in a tetraradial body, interpreted as muscle bundles and compared with Staurozoa, but fibre identity and detailed homology have competing primary assessments.
claim:event:haootia-muscle-interpretationHaootia muscle and staurozoan interpretation
A late-Ediacaran impression exposes the difference between visible repeated structures and contested tissue or crown-group identity.
Represented range560–560 Ma
RegionsFermeuse Formation, Bonavista Peninsula, Newfoundland, Canada
CladesHaootia quadriformis · Staurozoa · Cnidaria
Claim ledger
References
- Haootia quadriformis n. gen., n. sp., interpreted as a muscular cnidarian impression from the Late Ediacaran periodLiu, A.G.; Matthews, J.J.; Menon, L.R.; McIlroy, D.; Brasier, M.D. · 2014 · DOI 10.1098/rspb.2014.1202
- Is Haootia quadriformis related to extant Staurozoa (Cnidaria)? Evidence from the muscular system reconsideredMiranda, L.S.; Collins, A.G.; Marques, A.C. · 2015 · DOI 10.1098/rspb.2014.2396
- The palaeobiology of two crown group cnidarians: Haootia quadriformis and Mamsetia manunis gen. et sp. nov. from the Ediacaran of Newfoundland, CanadaMcIlroy, D.; Pasinetti, G.; Pérez-Pinedo, D.; McKean, C.; Taylor, R.S. · 2024 · DOI 10.3390/life14091096