مسقوفات الرأس
| مسقوفات الرأس Stegocephalians Temporal range: Late Devonian–recent PreЄ
Є
O
S
D
C
P
T
J
K
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|---|---|
| پروتروگيرينوس | |
| التصنيف الفهمي | |
| أصنوفة غير معروفة (أصلحها): | Elpistostegalia |
| فرع: |
مسقوفات الرأس كوپ, 1868 |
| Subgroups | |
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†Elpistostege | |
مسقوفات الرأس Stegocephalia هواسم أقدم لبرمائيات أحفورية كبيرة، تضم جميع المجموعات قبل الجوراسي وبعض المجموعات الكبيرة المنقرضة لاحقاً والتي تضم ما يشبه السلمندر. المصطلح صاغه في 1868 عالم الإحاثة الأمريكي إدوارد درنكر كوپ and comes from Greek στεγοκεφαλια - "roofed head", and refer to the copious amounts of dermal armour some of the larger primitive forms evidently had. In recent times, Canadian paleontologist Michel Laurin has used as a phylogenetic expression to encompass all vertebrates with toes rather than fins, i.e. tetrapods.
تاريخ التصنيف
Originally, the term was used as a systematic unit at the rank of order. The term rose to prominence in American and British science in the 18th century, though the largely equivalent term Labyrinthodontia had been coined 18 years earlier by Hermann Burmeister in reference to the tooth structure.
النسالة
Below is a suggested evolutionary tree of tetrapods and their relatives, from Colbert 1969 and Caroll 1997. Dashed lines indicate relationships that commonly vary between authors.
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الهامش
- ^ Cope E. D. 1868. Synopsis of the extinct Batrachia of North America. Proceedings of The Academy of Natural Sciences of Philadelphia: pp 208-221
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^ Laurin, M (May 2001). "The oldest stegocephalian from the Iberian peninsula: evidence that temnospondyls were euryhaline". Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie. 324 (5): 495–501. PMID 11411292. Unknown parameter
|coauthors=ignored (|author=suggested) (help) - ^ Burmeister, H. (1850): Die Labyrinthodonten aus dem Saarbrücker Steinkohlengebirge, Dritte Abtheilung: der Geschichte der Deutschen Labyrinthodonten Archegosaurus. Berlin: G. Reimer, 74 pp.
- ^ Colbert, E. H., (1969), Evolution of the Vertebrates, John Wiley & Sons Inc (2nd ed.)
- ^ Carroll, R. L. (1997): Patterns and Processes of Vertebrate Evolution. Cambridge University Press, Cambridge. 464 pages
وصلات خارجية
- Tree of Life: Terrestrial Vertebrates
