Xenodiscidae
The Xenodiscidae are the earliest of the Ceratitida and comprise Middle and Upper Permian genera characterized by compressed, discoidal, evolute shells with rounded to acute venters and commonly with lateral ribs. Sutures are goniatitic to weakly ceratitic.[1]
Xenodiscidae Temporal range: M-U Permian | |
---|---|
Xenodiscus besairiei on display at the Museo Civico di Storia Naturale di Milano | |
Scientific classification | |
Kingdom: | |
Phylum: | |
Class: | |
Subclass: | |
Order: | |
Suborder: | |
Superfamily: | |
Family: | Xenodiscidae Frech 1902 |
Genera | |
|
The Xenodiscidae, which are part of the superfamily Xenodiscaceae, are derived from the Daraelitidae, a family in the Prolecanitida (ibid). In turn, the Xenodiscidae provided the root stock for the subsequent expansion and diversification of the Ceratitida in the Triassic.
Notes
- Arkell et al, 1957
gollark: No, the nontest instance is up with a different prefix.
gollark: --remind 1m APIOtest2â„¢
gollark: Troubling.
gollark: --remind 1m APIOTESTâ„¢
gollark: I'm trying an experimental technique called "refactoring" where I make things not be all in the same file, you see.
References
- Arkell et al., 1957; Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part-L, Ammonoidea; Geological Soc. of America, reprinted 1990.
- The Paleobiology Database July 2009
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.