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Showing results for tags 'moythomasia'.
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Good morning everyone! I have collected many vertebrate fossils from Tournaisien dolomites, Carboniferous marls and Early Carboniferous- Permian carbonated sandstones. I tried to identify the age of the erratics for a very long time and I think that all three types of erratics are from Carboniferous or Permian periods. There are many rhizodonts, megalichthyids, lungfish dental plates, one ganoid scale, small shark tooth and even one big ptyctodontid placoderm tooth (I have doubt if it is more famennian like or could be Tournaisien). In the same Tournaisien dolomites I have found many crinoids, brachiopods and molluscs. From brachiopods the Productids, spiriferids, rhynchonellids are very numerous, there are also some athyridids and Orthotetes specimens. In the marls the clam shrimp remains are often, plant (like horsetail) remains are very rare, the majority of fishes are rhizodonts and there is also one specimen of two skull bones from small amphibian. Please help to confirm vertebrate fragments (especially Sagenodus lower jaw and Ctenodus upper jaw plates), for the age confirmation I also will show invertebrates if it is needed. Best Regards Domas
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Taxonomy according Fossilworks.org. Diagnosis for Moythomasia nitida in Choo 2015, p. e952817-5: "A Moythomasia with a standard length of up to 15 cm, with about 55 vertical scale rows from head to caudal peduncle. Frontal margins form a straight contact against the posterior margin of the rostral. Numerous pores on the ventral surfaces of the lower jaw, opercular-gular series, and pectoral girdle. Rostral with squared-off anteroventral margin that is excluded from the biting margin by the premaxillae. Posterolaterally directed ridges on the dorsal lamina of the rostral. Postorbital maxillary blade with gently curved dorsal margin. Suboperculum more than half the size of the operculum, with small squared-off anterodorsal margin against the adjoining accessory operculum. Two postorbitals anterior to preoperculum, excluding that bone from contact with the jugal. Ornamentation on anterior face of preoperculum dorsoventrally oriented. Dentary teeth of similar size to maxillary teeth. Mandibular sensory canal dorsally deflected on the anterior half of the dentary. Dorsal and anal fins positioned opposite to one another. Pectoral lepidotrichia evenly segmented to fin base. One pair of round, preanal scutes. Flank scales ornamented with anastomosing ridges with intermixed punctae." Line drawing from Choo, 2015 p. e952817-18: References: Jessen, H. (1968): Moythomasia nitida GROSS und M. cf. striata GROSS, Devonische Palaeonisciden aus dem oberen Plattenkalk der Bergisch-Gladbach-Paffrather Mulde (Rheinisches Schiefergebirge)." Palaeontographica, Abteilung A: Palaeozoologie-Stratigraphie 128(4-6): 87-114, pls. 11-17, 9 figs. Ørvig, T. (1960): New finds of acanthodians, arthrodires, crossopterygians, ganoids and dipnoans in the upper Middle Devonian Calcareous Flags (Oberer Plattenkalk) of the Bergisch Gladbach– Paffrath trough: Paläontologische Zeitschrift, Vol. 34, pp. 295–335. Ørvig, T. (1961): New finds of acanthodians, arthrodires, crossopterygians, ganoids and dipnoans in the Upper Middle Devonian calcareous flags (Oberer Plattenkalk) of the Bergisch Gladbach-Paffrath Trough, Part 2. Paläont. Zeitschrift, Vol. 35, pp. 10-27, 6 pics. JESSEN, H. (1966): Die Crossopterygier des Oberen Plattenkalkes (Devon) der Bergisch-Gladbach-Paffrather Mulde (Rheinisches Schiefergebirge) unter Berücksichtigung von amerikanischem und europäischen Onychodus-Material. Arkiv foer zoologi Ser.2, 18, Nr.14 :305-389. CHOO, B. (2015): A NEW SPECIES OF THE DEVONIAN ACTINOPTERYGIAN MOYTHOMASIA FROM BERGISCH GLADBACH, GERMANY, AND FRESH OBSERVATIONS ON M. DURGARINGA FROM THE GOGO FORMATION OF WESTERN AUSTRALIA. Journal of Vertebrate Paleontology, 35(4), 1–21.
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- bergisch-gladbach
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