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Sphenothallus

Extinct genus of aquatic animals From Wikipedia, the free encyclopedia

Sphenothallus
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Sphenothallus is a problematic extinct genus lately attributed to the conulariids. It was widespread in shallow marine environments during the Paleozoic.[2][4]

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Occurrence

Sphenothallus is represented in the Cambrian period in the Kaili biota and the Mount Stephen trilobite beds, where it co-occurs with the similar organisms Cambrorhythium and Byronia.[1] It is known in younger strata in Canada and the US, surviving at least until the Mississippian.[3]

Ecology

Sphenothallus lived in groups as an opportunist in environments from hardgrounds to soft mud, even if depleted in oxygen.[3] It probably dispersed via larvae.[3]

Notes

  1. Earliest, upper Lower Cambrian (Van Iten et al 2002); latest, not referenced; at least to Mississippian

References

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