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Lichens were a component of the early terrestrial ecosystems, and the estimated age of the oldest terrestrial lichen fossil is 400 Ma; [28] this date corresponds to the age of the oldest known sporocarp fossil, a Paleopyrenomycites species found in the Rhynie Chert. [29]
Gondwanagaricites (meaning "Gondwanan mushroom fossil") is an extinct monotypic genus of gilled fungus in the order Agaricales from the Early Cretaceous Crato Formation of Brazil. [1] It contains the single species G. magnificus , and it is the oldest known mushroom fossil known to date.
The famous Montanan Tertiary deposits of the Ruby Valley basin were also first studied in 1947. The early research was performed by Dr. Herman F. Becker on behalf of the New York Botanical Garden. These deposits from the southwestern part of the state are one of the best sources of plant and insect fossils in North America.
Cichlids of South America and the "sunfish" of North America are strikingly similar in morphology, ecology and behavior. [118] The peacock bass and largemouth bass are excellent examples. The two fishes are not related, yet are very similar. Peacock bass are native of South America and is a Cichla.
North America A transitional form between steppe bison and modern American bison whose more recent remains date to the early Holocene of Valsequillo basin in Puebla, Mexico. However the direct dating to 5271-5131 BCE is not calibrated and the remains could be older. [50] Other remains in North America have been dated to 8640-8500 BCE. [4 ...
The phylogeny (evolutionary "family tree") of molluscs is a controversial subject. In addition to the debates about whether Kimberella and any of the " halwaxiids " were molluscs or closely related to molluscs, [ 5 ] [ 6 ] [ 8 ] [ 9 ] debates arise about the relationships between the classes of living molluscs. [ 7 ]
The ancestors of coleoids (including most modern cephalopods) and the ancestors of the modern nautilus, had diverged by the Floian Age of the Early Ordovician Period, over 470 million years ago. We know this because the orthocerids were the first known representatives of the neocephalopoda, [ 40 ] were ultimately the ancestors of ammonoids and ...
The other three unite related orders which share a common ancestor and form a branch of the nautiloid taxonomic tree: Plectronoceratoidea, which consists mostly of small Cambrian forms that include the ancestors of subsequent stocks; Orthoceratoidea, which unites different primarily orthoconic orders (including the ancestors for Bacritida and ...