Pteroniscus turkestanensis (Gorizdro-Kulczycka, 1926)

By oilshale (edited)

• February 25, 2017

Taxonomy

Kingdom: Animalia
Phylum: Chordata
Class: Actinopteri Cope 1871
Order: Palaeonisciformes Hay 1902
Family: incertae sedis
Genus: Pteroniscus
Species: Pteroniscus turkestanensis
Author Citation (Gorizdro-Kulczycka, 1926)

Geological Time Scale

Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Middle
International Age: Middle or Late

Stratigraphy

Karabastau Formation

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 12 cm

Location

Aulie
Karatau Range
Tian-Shan Mountains
Kazakhstan

• jurassic
• karabastau formation
• karatau
• kazakhstan
• pteroniscus
• tff-oilshale-ch634
• turkestanensis

Comments

This fish was first described under the name Oxygnathus turkestanensis by Gorizdro-Kulczycka, pp. 185–187.

Emended diagnosis from Skrzycka 2014, p. 4: "Palaeoniscoid fish with large preopercle with horizontal arm almost as broad as deep. Some pectoral lepidotricha serrated posteriorly. Number of lepidotrichia large, exceeding 20. Pelvic fin, dorsal fin and anal fin all broad based. Fulcral scales absent from base of pelvic fin; single fulcra present in front of anal fin; few fulcra in front of dorsal fin, and there are few ventral caudal fulcra. Scales along lateral line numerous (exceeding 50) up to the base of caudal fin; more than 10 scale rows above lateral line scale row below dorsal fin base, and similar or higher number of scale rows below lateral line scale row above pelvic fin base."

Line drawing by Skrzycka 2014, p. 10 (Scale bar = 10 mm):

References:

Roksana Skrzycka (2014): Revision of two relic actinopterygians from the Middle or Upper Jurassic Karabastau Formation, Karatau Range, Kazakhstan, Alcheringa: An Australasian Journal of Palaeontology, DOI: 10.1080/03115518.2014.880267