Moythomasia nitida Gross, 1953

By oilshale (edited)

• November 13, 2016

Taxonomy

Kingdom: Animalia
Phylum: Chordata Haeckel 1874
Class: Actinopteri Cope 1871
Order: incertae sedis
Family: incertae sedis
Genus: Moythomasia
Species: Moythomasia nitida
Author Citation Gross, 1953

Geological Time Scale

Eon: Phanerozoic
Era: Paleozoic
Period: Devonian
Sub Period: None
Epoch: Late
International Age: Frasnian

Stratigraphy

Ahrdorf Formation
Oberer Plattenkalk Member

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 6 cm

Location

Heiligenstock quarry
Bergisch-Gladbach, Paffrath
Rhine-Westphalia
Germany

• bergisch-gladbach
• devonian
• moythomasia
• paffrath
• tff-oilshale-ch932

Comments

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.