Discovered in the Floian strata of
Newfoundland, coral-like
fossils of
Reptamsassia divergens and
Reptamsassia minuta are the oldest example of
symbiotic intergrowth of modular species. This allows to judge the level of development of
reef ecosystems of the Early Ordovician.
Conodonts
Serratognathus,
Prioniodus and
Oepikodus were distributed in
Kazakhstan,
Korea,
China,
Indochina and
Australasia during the Floian age. Two species of
Paroistodus are known from the Floian deposits of Baltoscandia and South China. Several thousand chemically isolated
graptolite specimens including genera
Baltograptus and
Pseudophyllograptus were collected from the upper Floian sediments of
Skattungbyn,
Dalarna, central
Sweden. Presented mostly by juveniles and isolated
siculae, these graptolites inhabited primarily in shallow water environment.
Trilobites of the genera
Tsaidamaspis,
Zhiyia and
Liexiaspis were found in the Floian part of the
Duoquanshan Formation, northwest China.
Falloaster anquiroisitus, an
asterozoan of problematic classification, is known from the Floian
Garden City Formation of
Idaho,
USA. ==References==