Gymnitidae: Difference between revisions

Gymnitidae; Temporal range: Early Triassic–Middle Triassic PreꞒ Ꞓ O S D C P T J K Pg N
	Gymnites incultus from Bosnia, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ceratitida
Superfamily:	†Pinacoceratoidea
Family:	†Gymnitidae; Waagen, 1898
Genera
	See text

Browse history interactively

← Previous edit

Content deleted Content added

VisualWikitext

Inline

Latest revision as of 19:01, 18 July 2023

Gymnitidae is a family of Lower to Middle Triassic ammonite cephalopods with evolute, discoidal shells.

Hyatt and Smith (1905, p. 114-115) included the Gymnitidae in the suborder Ceratitoidea, which later became the superfamily Ceratitaceae and included in it genera more primitive than Gymnites as well as the more advanced Gymnites. Those being Xenaspis, Flemingites, and Ophiceras. Derivation as shown in Smith (1932 p. 30) is from Xenodiscus.

The more primitive Xenaspis, Flemingites, and Ophiceras, found in Lower Triassic beds in western America have ceratitic sutures. The more developed Gymnites has deeply digitate ammonitic sutures.

Arkell, et al., 1957, in the Treatise on Invertebrate Paleontology, on the other hand included the Gymnitidae in the Pinacocerataceae as the earlier and more primitive of its two families, combining Gymnites with coeval and more advanced forms. Genera included in the Gymnitidae sensu Arkell include Eogymnites, Buddhaites, Japanites, and of course, Gemnites. The genus Xiphogymnites was included by Tozer in 1981.

Whether to place the Gymnitidae in the Ceratitaceae, as in Hyatt and Smith, combining Gymnites with its more primitive relatives, or in the Pinacocerataceae, as in Arkell et al., combining Gymnites with its coeval or more advanced relatives is a matter of perspective which does little to change the overall phylogeny.

References

Arkell, et al., 1957. Mesozoic Ammonidea. Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geol Soc of America and Univ. Kansas Press.
Alpheus Hyatt and James Perrin Smith, 1905. The Triassic Cephalopod Genera of America. U.S. Geological Survey Professional Paper no. 40. (p. 114-115)
James Perrin Smith, 1932. Lower Triassic Ammonoids of North America. U.S. Geological Survey Professional Paper no. 167 (p. 30)

This Ceratitida-related article is a stub. You can help Wikipedia by expanding it.

@@ Line 1: / Line 1: @@
+{{Short description|Extinct family of ammonites}}
 {{Automatic taxobox
 | fossil_range = {{Fossilrange|Early Triassic|Middle Triassic}}
-| image =
+| image = Gymnitidae - Gymnites incultus-001.JPG
+| image_caption = ''Gymnites incultus'' from Bosnia, on display at [[Galerie de paléontologie et d'anatomie comparée]] in Paris
-| classis = [[Cephalopoda]]
+| taxon = Gymnitidae
-| subclassis = [[Ammonoidea]]
+| authority = [[Wilhelm Heinrich Waagen|Waagen]], 1898
-| ordo = [[Ceratitida]]
-| superfamilia = [[Pinacocerataceae]]
-| familia = †'''Gymnitidae'''
-| familia_authority = [[Wilhelm Heinrich Waagen|Waagen]], 1898
 | subdivision_ranks = Genera
-| subdivision =
+| subdivision = See text
+}}
-*See text}}
 '''Gymnitidae''' is a family of Lower to Middle [[Triassic]] [[ammonite]] cephalopods with evolute, discoidal shells.
-Hyatt and Smith (1905, p.114-115) included the Gymnitidae in the suborder Ceratitoidea, which later became the superfamily [[Ceratitaceae]] and included in it genera more primitive than ''[[Gymnites]]'' as well as the more advanced ''Gymnites''.  Those being ''[[Xenaspis]]'', ''[[Flemingites]]'', and ''[[Ophiceras]]''. Derivation as shown in Smith (1932 p.30) is from ''[[Xenodiscus]]''.
+Hyatt and Smith (1905, p.&nbsp;114-115) included the Gymnitidae in the suborder Ceratitoidea, which later became the superfamily [[Ceratitaceae]] and included in it genera more primitive than ''[[Gymnites]]'' as well as the more advanced ''Gymnites''.  Those being ''[[Xenaspis]]'', ''[[Flemingites]]'', and ''[[Ophiceras]]''. Derivation as shown in Smith (1932 p.&nbsp;30) is from ''[[Xenodiscus]]''.
 The more primitive ''Xenaspis'', ''Flemingites'', and ''Ophiceras'', found in Lower Triassic beds in western America have ceratitic sutures. The more developed ''Gymnites'' has deeply digitate ammonitic sutures.
-Arkell, et al, 1957, in the Treatise on Invertebrate Paleontology, on the other hand included the Gymnitidae in the [[Pinacocerataceae]] as the earlier and more primitive of its two families, combining ''Gymnites'' with coeval and more advanced forms.  Genera included in the Gymnitidae sensu Arkell include ''[[Gymnites|Eogymnites]]'', ''[[Buddhaites]]'', ''[[Japanites]]'', and of course, ''Gemnites''. The genus ''[[Xiphogymnites]]'' was included by Tozer in 1981.
+Arkell, et al., 1957, in the [[Treatise on Invertebrate Paleontology]], on the other hand included the Gymnitidae in the [[Pinacocerataceae]] as the earlier and more primitive of its two families, combining ''Gymnites'' with coeval and more advanced forms.  Genera included in the Gymnitidae sensu Arkell include ''[[Gymnites|Eogymnites]]'', ''[[Buddhaites]]'', ''[[Japanites]]'', and of course, ''Gemnites''. The genus ''[[Xiphogymnites]]'' was included by Tozer in 1981.
-Whether to place the Gymnitidae in the Ceratitaceae, as in Hyatt and Smith, combing ''Gymnites'' with its more primitive relatives, or in the Pinacocerataceae, as in Arkell et al, combing ''Gymnites'' with its coeval or more advanced relatives is a matter of perspective which does little to change the overall phylogeny.
+Whether to place the Gymnitidae in the Ceratitaceae, as in Hyatt and Smith, combining ''Gymnites'' with its more primitive relatives, or in the Pinacocerataceae, as in Arkell et al., combining ''Gymnites'' with its coeval or more advanced relatives is a matter of perspective which does little to change the overall phylogeny.
 ==References==
-* Arkell, et al, 1957. Mesozoic Ammonidea. Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geol Soc of America and Univ. Kansas Press.
+* Arkell, et al., 1957. Mesozoic Ammonidea. Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geol Soc of America and Univ. Kansas Press.
-*Alpheus Hyatt and James Perrin Smith, 1905. The Triassic Cephalopod Genera of America. U.S. Geological Survey Professional Paper no. 40. (p.114-115)
+*Alpheus Hyatt and James Perrin Smith, 1905. The Triassic Cephalopod Genera of America. U.S. Geological Survey Professional Paper no. 40. (p.&nbsp;114-115)
-* James Perrin Smith, 1932. Lower Triassic Ammonoids of North America. U.S. Geological Survey Professional Paper no. 167 (p.30)
+* [[James Perrin Smith]], 1932. Lower Triassic Ammonoids of North America. U.S. Geological Survey Professional Paper no. 167 (p.&nbsp;30)
+{{Portal|Paleontology}}
+{{Taxonbar|from=Q5624496}}
-[[Category: Ammonites]]
+[[Category:Gymnitidae| ]]
+[[Category:Ceratitida families]]
-{{portal|Paleontology}}
+[[Category:Pinacocerataceae]]
+[[Category:Early Triassic first appearances]]
+[[Category:Middle Triassic extinctions]]
+{{Ceratitida-stub}}