Padangia

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Padangia
Temporal range: Eocene
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Cyprinidae
Subfamily: Barbinae
Genus: Padangia
Murray, 2019
Species:
P. amblyostoma
Binomial name
Padangia amblyostoma
(von der Marck 1876)
Synonyms

Thynnichthys amblyostomavon der Marck 1876

Padangia is a genus of Barbinae that lived in Sangkarewang Formation during the Eocene Epoch. Previously known as "Thynnichthys ambylostoma", its name derived from Padang which is the capital of West Sumatra that located near the fossil deposit. [1]

There are more than 500 specimens referred to this taxon with the biggest specimen measuring 12,5 inch/30,5 cm long. Padangia is said to differ than most barbines by its large head that take about one-third of their standard length, cylindrical body with greatest body depth equal to or less than head depth, and strongly rounded and compressed pharyngeal teeth. Its jaws are relatively short and the mouth would be slightly upturned in life.

Other autapomorphies of this taxa are ornamented striated opercle, supraorbital that have few short striations on the posterior fifth of the bone, and preopercle with seven or more canal pore openeings on the ventral limb. Sanders (1934) reported there are 60 cycloid scales covering the lateral line although all of the specimens examined by Murray (2019) don't show these scalation. [1] [2]

Reference

  1. 1 2 Murray, Alison M. (2019-09-02). "Redescription of Barbus megacephalus Günther, 1876 and Thynnichthys amblyostoma von der Marck, 1876 (Cypriniformes: Cyprinidae) from probable Eocene deposits of Southeast Asia, and an assessment of their taxonomic positions". Journal of Systematic Palaeontology. 17 (17): 1433–1455. doi:10.1080/14772019.2018.1533897. ISSN   1477-2019.
  2. Sanders, M. (1934). "Die Fossilen Fische der Alttertiären Süsswasserablagerungen aus Mittel-Sumatra. Verhandelingen van het Geologisch-Mijnbouwkundig Genootschap voor Nederland en Koloni'n". Geologische Series. 11: 1–144.