Thelodontiformes is an extinct order of jawless fish of the Silurian.Kiaer, J., 1932: New coelolepids from the Upper Silurian on Oesel (Esthonia). Eesti Loodusteaduse Arhiiv, Seeria 1, 10: 167-176. Because the paucity of intact fossils, especially since some families are known entirely from scale fossils, taxonomy of thelodonts is based primarily on scale morphology. A recent assessment of thelodont taxonomy by Wilson and Märss in 2009 merges the

orders Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

Loganelliiformes, Katoporiida and Shieliiformes into Thelodontiformes, places

families Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Ideal ...

Lanarkiidae and Nikoliviidae into

Furcacaudiformes Furcacaudiformes is an extinct order of jawless fish in the class Thelodonti. Because the paucity of intact fossils, especially since some families are known entirely from scale fossils, taxonomy of thelodonts is based primarily on scale morpho ...

(because of scale morphology) and establishes

Archipelepidiformes Archipelepidiformes is an order of extinct jawless fishes in the class Thelodonti. Archipelepidiforms are regarded as the basalmost thelodonts primarily because the histology and morphology of archipelepidiforms have many similarities with the h ...

as the basal-most order.Wilson, Mark VH, and Tiiu Märss. "Thelodont phylogeny revisited, with inclusion of key scale-based taxa." Estonian Journal of Earth Sciences 58.4 (2009): 297œ310

/ref> Phlebolepis elegans

References

External links

* Thelodonti Silurian jawless fish Prehistoric jawless fish orders Silurian first appearances Silurian extinctions {{Silurian-animal-stub