Furcacaudiformes is an extinct
order
Order, ORDER or Orders may refer to:
* A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica
* Categorization, the process in which ideas and objects are recognized, differentiated, and understood
...
of jawless fish in the class
Thelodonti
Thelodonti (from Greek: "nipple teeth")Maisey, John G., Craig Chesek, and David Miller. Discovering fossil fishes. New York: Holt, 1996. is a class of extinct Palaeozoic jawless fishes with distinctive scales instead of large plates of armor.
T ...
.
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
Morphology, from the Greek and meaning "study of shape", may refer to:
Disciplines
*Morphology (archaeology), study of the shapes or forms of artifacts
*Morphology (astronomy), study of the shape of astronomical objects such as nebulae, galaxies, ...
. A 2009 assessment of thelodont
taxonomy
image:Hierarchical clustering diagram.png, 280px, Generalized scheme of taxonomy
Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme o ...
by Wilson and Märss merges the orders Loganelliiformes, Katoporiida and Shieliiformes into
Thelodontiformes
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, especial ...
, places
families
Family (from ) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictability, structure, and safety as ...
Lanarkiidae and
Nikoliviidae into Furcacaudiformes (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.
References
External links
*
Thelodonti
Devonian jawless fish
Prehistoric jawless fish orders
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