Paramblypterus vratislaviensis (Agassiz, 1833)

By oilshale

• January 21, 2022

Taxonomy

Kingdom: Animalia
Phylum: Chordata Haeckel 1874
Class: Actinopteri Cope 1871
Order: Paramblypteriformes Heyler 1969
Family: Amblypteridae Romer 1945
Genus: Paramblypterus
Species: Paramblypterus vratislaviensis
Author Citation (Agassiz, 1833)

Geological Time Scale

Eon: Phanerozoic
Era: Paleozoic
Period: Permian
Sub Period: None
Epoch: Early
International Age: Asselian

Stratigraphy

Broumov Formation
Ruprechtice Limestone Horizon

Provenance

Collector: T. Bastelberger
Date Collected: 07/01/1995
Acquired by: Field Collection

Dimensions

Length: 14 cm

Location

Ruprechtice
Liberec (town)
Liberecký kraj (region)
Czech Republic

• asselian
• broumov formation
• cisuralian
• czech republic
• olivětín member
• paramblypterus
• permian
• ruprechtice
• tff-oilshale-ch1154
• vratislaviensis

Comments

Originally the fish was described by Agassiz in 1833 under the name Palaeoniscus vratislaviensis.

Taxonomy from Štamberg 2021.

Diagnosis of Paramblypterus vratislaviensis from Štamberg 2021, p. 77:”. Small fish usually ranging from 100 to 120 mm, exceptionally to 150 mm. The frontal is 3.5 times longer than wide and 2.5 times longer than the length of the parietal. The anterior margin of the frontal is concave medially, interfrontal suture only slightly undulated and without folds, the sculpture on the frontal consists of ridges parallel with the posterior margin of the bone. The dermosphenotic is narrow, elongated anteroposteriorly. The dermopterotic, with lateral process but without posterior process, is narrower anteriorly than posteriorly. The infraorbital superior, dermosphenotic and supraorbital anterior form the dorsal edge of the orbit. The maxilla has a short and high maxillary plate which is convex dorsally, the length/height ratio of the maxillary plate is 1 or less than 1. The operculum is oblong in shape, 1.4 times deeper than it is long. The scales on the anterior part of the body bear fine ridges extending posteriorly to the denticles. Denticulation decreases on the scales in the posterior direction and the last denticulate scale appears in the 13th scale row. A field of small scales occurs along the base of the anal and dorsal fins.”

Line drawing from Štamberg 2021, p. 82:

Paramblypterus vratislaviensis (Agassiz, 1833). a: restoration of the body in lateral view, scale bar 10 mm.

References:

Agassiz, L. (1833): Recherches sur les Poissons fossiles. – Aux frais de l’auteur, Neuchâtel, 336 pp. https://doi.org/10.5962/bhl.title.4275
Fritsch, A. (1894): Fauna der Gaskohle und der Kalksteine der Permformation Böhmens. 3(3). – Selbstverlag (in Commission bei Fr. Řivnáč), Prag, pp. 81–104.
Štamberg, S. (2021): Actinopterygians of the Broumov Formation (Permian) in the Czech part of the Intra-Sudetic Basin (the Czech Republic). – Fossil Imprint, 77(1): 73–101, Praha. ISSN 2533-4050 (print), ISSN 2533-4069 (on-line).