THREE NEW SPECIES OF NAUTILIDS (CEPHALOPODS) FROM THE CARBONIFEROUS OF DONETS BASIN (EASTERN UKRAINE)
Three new species of nautilids (Gzheloceras aisenvergi sp. nov., Knightoceras extorris sp. nov. and Planetoceras yefimenkoi sp. nov.) have been described from the Carboniferous of the Donets Basin (Ukraine). Gzheloceras aisenvergi sp. nov. is morphologically close to the “Gzheloceras” orthocostatum...
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| Datum: | 2021 |
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| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
Institute of Geological Sciences, NAS of Ukraine
2021
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| Schlagworte: | |
| Online Zugang: | http://geojournal.igs-nas.org.ua/article/view/227012 |
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| Назва журналу: | Geological journal |
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Geological journal| Zusammenfassung: | Three new species of nautilids (Gzheloceras aisenvergi sp. nov., Knightoceras extorris sp. nov. and Planetoceras yefimenkoi sp. nov.) have been described from the Carboniferous of the Donets Basin (Ukraine). Gzheloceras aisenvergi sp. nov. is morphologically close to the “Gzheloceras” orthocostatum (Kruglov, 1939) and Gzheloceras memorandum Shimansky, 1967. Knightoceras oxylobatum Miller et Downs, 1948 and K. patulum (Unklesbay, 1962) are the most morphologically related species to the K. extorris sp. nov. The form of the conch and the surface ornamentation of Planetoceras yefimenkoi sp. nov. are most similar to the type of genus (Planetoceras retardum Hyatt, 1893). The new data are expanding the taxonomic composition of the genera Gzheloceras, Knightoceras, and Planetoceras and also clarify their geographical distribution. |
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