alpinites and other posttornoceratidae (goniatitida, famennian)

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ID: 180300
2002
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Abstract
The rediscovery of the supposedly lost type allows a revision of Alpinites Bogoslovskiy, 1971, the most advanced genus of the Posttornoceratidae. The type-species, Alp. kayseri Schindewolf, 1923, is so far only known from the Carnic Alps. Alp. schultzei n. sp. from the eastern Anti-Atlas of Morocco is closely related to Alp. kajraktensis n. sp. (= Alp. kayseri in Bogoslovskiy 1971) from Kazakhstan. A second new and more common species of southern Morocco, Alp. zigzag n. sp., is also known from the Holy Cross Mountains (Poland).

The taxonomy and phylogeny of other Posttornoceratidae are discussed. The holotype of Exotornoceras nehdense (Lange, 1929) was recovered and is re-illustrated; it is conspecific with Exot. superstes (Wedekind, 1908). The genus and species is also here first recorded from Morocco. Post. weyeri Korn, 1999 is a subjective synonym of Post. posthumum (Wedekind, 1918) in which strongly biconvex growth lines, as typical for the family, are observed for the first time. Goniatites lenticularis Richter, 1848 is a nomen dubium within Discoclymenia, Clymenia polytrichus in Richter (1948) is a Falcitornoceras. It seems possible to distinguish an extreme thin and trochoid Disco. haueri (Münster, 1840) from the tegoid Disco. cucullata (v. Buch, 1839).

Various taxa are excluded from the Posttornoceratidae. Posttornoceras sapiens Korn, 1999 forms the type-species of Maiderocera n. gen., Discoclymenia n. sp. of Müller (1956) is assigned to Maid. muelleri n. sp. Disco. cornwallensis is the type-species of Selwoodites n.gen (Sporadoceratidae) which also occurs in the Rhenish Massive.

Durch Auffinden des verschollen geglaubten Typus-Exemplares wird eine Revision der Gattung Alpinites Bogoslovskiy, 1971, der höchst entwickelten Gattung der Posttornoceratidae, möglich. Die Typus-Art, Alp. kayseri Schindewolf, 1923, kommt gesichert bisher nur in den Karnischen Alpen vor. Alp. schultzei n. sp. aus dem östlichen Anti-Atlas (Marokko) ist nah mit Alp. kajraktensis n. sp. aus Kazakhstan (= Alp. kayseri in Bogoslovskiy 1971) verwandt. Eine zweite, aber häufigere neue Art Süd-Marokkos, Alp. zigzag n. sp., wird auch im Heiligkreuzgebirge (Polen) nachgewiesen.

Die Taxonomie und Phylogenie anderer Vertreter der Posttornoceratidae werden diskutiert. Der verschollen geglaubte Holotypus von Exotornoceras nehdense (Lange, 1929) wird neu abgebildet und ist conspezifisch mit Exot. superstes (Wedekind, 1908). Die Gattung und Art wird erstmals auch in Marokko nachgewiesen. Post. weyeri Korn, 1999 ist ein subjektives Synonym von Post. posthumum (Wedekind, 1918) bei dem erstmals die Familien-typischen, stark biconvexen Anwachsstreifen beobachtet wurden. Goniatites lenticularis Richter, 1848 ist ein nomen dubium innerhalb von Discoclymenia, Clymenia polytrichus in Richter (1848) ein Falcitornoceras. Es scheint möglich, eine extrem dünne, trochoide Disco. haueri (Münster, 1840) von der tegoiden Disco. cucullata (v. Buch, 1839) zu trennen.

Verschiedene Taxa werden aus den Posttornoceratidae ausgeschlossen. Post. sapiens Korn, 1999 wird als Typus-Art zu Maideroceras n. gen. gestellt. Discoclymenia n. sp. in Müller (1956) wird als Maid. muelleri n. sp. neu beschrieben. Disco. cornwallensis Selwood, 1960 bildet die Typusart von Selwoodites n. gen. (Sporadoceratidae), welches auch im Rheinischen Schiefergebirge vorkommt.

doi:10.1002/mmng.20020050105
Reference Key
becker2002fossil<i>alpinites</i> Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;R. T. Becker
Journal european journal of psychotraumatology
Year 2002
DOI
10.5194/fr-5-51-2002
URL
http://www.foss-rec.net/5/51/2002/fr-5-51-2002.pdf
Keywords
paleontology

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