Cnidarians are a disparate and ancient phylum, encompassing corals and jellyfish, and
occupy both the pelagic and benthic realms. They have a rich fossil record from the …

Myxozoans are obligate parasites that have complex life cycles requiring alternate
vertebrate and invertebrate hosts, with transmission via microscopic waterborne spores …

Phosphatic biomineralization is unknown in modern species of Scyphozoa (Cnidaria).
However, some extinct groups of Scyphozoa, such as conulariids and Sphenothallus, were …

The Ordovician Lagerstätten record substantial amounts of excellent preservation and soft-
bodied fossils during the Great Ordovician Biodiversification Event (GOBE). However, few …

Sphenothallus, a tubular fossil that occurs in Paleozoic strata around the world, may be
related to cnidarians or 'worms,'but its affinities remain controversial due to preservational …

Serially arranged sets of eight septa‐like structures occur in the basal part of phosphatic
tubes of Sphenothallus from the early Ordovician (early Floian) Fenxiang Formation in Hubei …

Abstract The Anti-Atlas contains a thick, volcanic-free Ordovician succession that originally
deposited in a passive-margin basin. Three main sedimentary packages are bounded by …

Sphenothallus is a problematic fossil with possible cnidarian affinities. Two species of
Sphenothallus, S. aff. longissimus and S. kukersianus, occur in the normal marine sediments …

Sphenothallus specimens are reported for the first time from the Mississippian of Central
Russia. All Sphenothallus specimens have a phosphatic composition and a characteristic …

Octapyrgites elongatus n. gen. n. sp., a relatively rare, tetraradial olivooid (Cnidaria,
Medusozoa), is described from Bed 5 of the Yanjiahe Formation (Cambrian Stage 2) near …