To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

How to transfigure the Wikipedia

Would you like Wikipedia to always look as professional and up-to-date? We have created a browser extension. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology.

Try it — you can delete it anytime.

Install in 5 seconds
4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
Great Wikipedia has got greater.
.
Leo
Newton
Brights
Milds

Rhipidistia

From Wikipedia, the free encyclopedia

Rhipidistians
Temporal range:
Early Devonian - Present, 416–0 Ma
LungfishMammalReptileTiktaalikAmphibianBird
Diversity of Rhipidistia
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Sarcopterygii
Clade: Rhipidistia
Subgroups

Rhipidistia, also known as Dipnotetrapodomorpha,[1] is a clade of lobe-finned fishes which includes the tetrapods and lungfishes. Rhipidistia formerly referred to a subgroup of Sarcopterygii consisting of the Porolepiformes and Osteolepiformes, a definition that is now obsolete.[2] However, as cladistic understanding of the vertebrates has improved over the last few decades, a monophyletic Rhipidistia is now understood to include the whole of Tetrapoda and the lungfishes.

Rhipidistia includes Porolepiformes and Dipnoi. Extensive fossilization of lungfishes has contributed to many evolutionary studies of this group. Evolution of autostylic jaw suspension, in which the palatoquadrate bone fuses to the cranium, and the lymph pumping "lymph heart" (later lost in mammals and flying birds), are unique to this group. Another feature shared by lungfish and tetrapods is the divided atrium.[3]

The precise time at which the choana of tetrapods evolved is debated, with some considering early rhipidistians as the first choanates. The feature is also present in modern lungfish but is probably a case of convergent evolution. The basal stem-lungfish Diabolepis did not possess it. Instead, it had four nostrils (two anterior and two posterior) like most fish. However, its posterior nares are very close to the lip, meaning a ventral 'displacement' of the posterior nostril can be considered a synapomorphy of the lungfish-tetrapod clade. The complete choana then seems to have developed independently in the two surviving clades.[4]

YouTube Encyclopedic

  • 1/5
    Views:
    2 362
    191 099
    456
    1 534
    29 901
  • Conquista do ambiente terrestre pelos tetrápodes
  • ANFÍBIOS - CORDADOS VERTEBRADOS | Biologia com Samuel Cunha
  • What Happened In The Devonian " TERROR" Period? - The History Of Earth
  • Ikan ini mampu bertahan hidup tanpa air
  • Devonian Period: The Age of Fish

Transcription

Etymology

The word "Rhipidistia" is from Ancient Greek: ῥιπίδιον, romanized: rhipídion, lit. 'small bellows'.

The word "Dipnotetrapodomorpha" is from Greek: δίπνοος, romanized: dipnoos, lit. 'with two breathing structures' (from δι- meaning "twice", and πνοή meaning "breathing, breath"); from Ancient Greek: τετρα-, romanized: tetra-, lit. 'four', the combining form of the numeral τέτταρες (tettares); from Ancient Greek: -ποδ-, romanized: -pod-, the combining form of πούς (pous) meaning "foot"; and from Ancient Greek: -μορϕος, romanized: -morphos, the combining form of μορϕή (morph) meaning "physical shape".

Relationships

The cladogram presented below is based on studies compiled by Philippe Janvier and others for the Tree of Life Web Project,[5] and Swartz 2012.[6]

Sarcopterygii

References

  1. ^ Joseph S., Nelson (19 May 2006). Fishes of the World. John Wiley & Sons. p. 461. ISBN 978-0-471-75644-6. Retrieved 9 May 2015.
  2. ^ "Encyclopædia Britannica". Retrieved 3 April 2014.
  3. ^ Pough, F. Harvey (2018). Vertebrate Life. Christine M. Janis, Sergi López-Torres (10th ed.). New York: Oxford University Press. p. 123. ISBN 978-1-60535-607-5. OCLC 1022979490.
  4. ^ Zhu, Min; Ahlberg, Per E. (2004). "The origin of the internal nostril of tetrapods". Nature. 432 (7013): 94–97. Bibcode:2004Natur.432...94Z. doi:10.1038/nature02843. ISSN 0028-0836. PMID 15525987. S2CID 4422813.
  5. ^ Janvier, Philippe. 1997. Vertebrata. Animals with backbones. Version 01 January 1997 (under construction). http://tolweb.org/Vertebrata/14829/1997.01.01 in The Tree of Life Web Project, http://tolweb.org/
  6. ^ Swartz, B. (2012). "A marine stem-tetrapod from the Devonian of Western North America". PLOS ONE. 7 (3): e33683. Bibcode:2012PLoSO...733683S. doi:10.1371/journal.pone.0033683. PMC 3308997. PMID 22448265.

External links


Stub icon

This article about a prehistoric lobe-finned fish is a stub. You can help Wikipedia by expanding it.

This page was last edited on 14 February 2024, at 11:23
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.
Contact WIKI 2
Introduction
Terms of Service
Privacy Policy