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Fossil Record A palaeontological open-access journal of the Museum für Naturkunde
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Volume 4, issue 1
Foss. Rec., 4, 71–82, 2001
https://doi.org/10.1002/mmng.20010040106
© Author(s) 2001. This work is distributed under
the Creative Commons Attribution 3.0 License.
Foss. Rec., 4, 71–82, 2001
https://doi.org/10.1002/mmng.20010040106
© Author(s) 2001. This work is distributed under
the Creative Commons Attribution 3.0 License.

  01 Jan 2001

01 Jan 2001

Muenstraia, ein neues Rugosa-Genus (Anthozoa) aus dem Obersilur und Unterdevon

D. Weyer D. Weyer
  • Löwestrasse 15, 10249 Berlin, Germany

Abstract. Muenstraia n. gen. ist eine der ältesten ahermatypischen Rugosa (Subordo Cyathaxoniina) und umfasst neben der Typusart Muenstraia franconica n. sp. (Ludlovium, Elbersreuther Orthoceratitenkalk, Frankenwald) drei weitere Arten: Muenstraia squarrosa (Sutherland, 1965) (unteres Ludlovium, Henryhouse-Formation, Oklahoma), Muenstraia sp. (oberes Lochkovium, Yukon-Gebiet), Muenstraia thuringica n. sp. (Pragium, Thüringisches Schiefergebirge und Tafilalt). Die Gattung kann von dem isolierten, nur aus Xinjiang bekannten Protozaphrentis Yü, 1957 des hohen Mittelordoviz abgeleitet werden; wichtige Deszendenten im Ludlovian sind Laccophyllum Simpson, 1900 und Sutherlandinia Weyer, 1972.

Der Bauplan entspricht dem seit Schindewolf (1931) traditionellen Konzept der Gattung Petraia Münster, 1839, die aber nach Revision (Weyer 2000) ihrer wahren Typusart Petraia decussata Münster, 1839 aus dem oberen Famennium einer anderen Entwicklungsreihe angehört (Neaxoninae Hill, 1981, jetzt Petraiidae Koninck, 1872). Für die dadurch namenlos gewordene Familia "Petraiidae" (etwa sensu Hill 1981) werden die bisher als Synonym ruhenden Protozaphrentidae Ivanovskiy, 1959 verfügbar, denen noch Duncanella Nicholson, 1874 sowie die Sutherlandiniinae Weyer, 1972 und die Ditoecholasmatinae Sutherland, 1965 zugeordnet sind.

Muenstraia, a new genus of Rugosa (Anthozoa) from the Late Silurian and Early Devonian

The new taxon, one of the most ancient members of the ahermatypic suborder Cyathaxoniina, includes the type species Muenstraia franconica n. sp. (Ludlovian, Elbersreuth Orthoceratites-Limestone Formation. Upper Franconia, Germany) and three further species: Muenstraia squarrosa (Sutherland, 1965) (lower Ludlovian, Henryhouse Formation, Oklahoma, USA), Muenstraia sp. (upper Lochkovian, Yukon Territories, Canada). Muenstraia thuringica n. sp. (middle/upper Pragian, Tentaculitid Limestone Formation, Thuringian Mountains, Germany, and middle Pragian, Tafilalt, Morocco). The genus descends from the isolated Upper Middle Ordovician Protozaphrentis Yü, 1957, only known from Xinjiang in China; it is the ancestor of two new phylogenetic lines starting in the Ludlovian with Laccophyllum Simpson, 1900, and Sutherlandinia Weyer, 1972.

Morphology and diagnosis are identical with the (since Schindewolf 1931) traditional definition of the genus Petraia Münster, 1839, which represents according to a revision of its real and Upper Famennian type species Petraia decussata Münster, 1839 (Weyer 2000) another phylogenetic line (Neaxoninae Hill, 1981, now Petraiidae Koninck, 1872). Therefore, the valid name of the family "Petraiidae" (sensu Hill 1981) becomes Protozaphrentidae Ivanovskiy, 1959, which comprise also Duncanella Nicholson, 1874, and both the Sutherlandiniinae Weyer, 1972 and Ditoecholasmatinae Sutherland, 1965.

doi:10.1002/mmng.20010040106

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