Palaeoniscidae

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Palaeoniscidae
Temporal range: Guadalupian-Lopingian
Palaeoniscum freieslebeni fossil
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Palaeonisciformes
Suborder:
Palaeoniscoidei
Family: Palaeoniscidae
Bonaparte, 1846[1]
Restoration of Palaeoniscum freieslebeni showing the typical morphology of most taxa that have been referred to Palaeoniscidae

Palaeoniscidae is an

Palaeozoic and Mesozoic early actinopterygian genera. The name is derived from the Ancient Greek words παλαιός (palaiós, ancient) and ὀνίσκος (oniskos, 'cod-fish' or woodlouse).[3]

Historic background

The family was first named "Palaeoniscini"

genera to Palaeoniscidae: Palaeoniscum, Platysomus (misspelled as Platysemius), Amblypterus, Eurynotus, Pygopterus, and Acrolepis.[5] With the exception of Palaeoniscum, these genera were later placed in separate families (Platysomidae, Amblypteridae) or are considered incertae sedis.[2]

Over the years, many other genera of Palaeozoic and Mesozoic early actinopterygians have been referred to Palaeoniscidae

paraphyletic
).

In the strict sense, the Palaeoniscidae should only encompass the genus Palaeoniscum and only those genera that are closely related to it. However, due to insufficient knowledge of Palaeoniscum and many other early actinopterygians, and because most of these

monophyletic
group.

Classification

The following list includes species and genera that have been referred to Palaeoniscidae in the past, usually because of broad resemblance with Palaeoniscum freieslebeni. Many of these taxa are poorly known and have never been analyzed in cladistic studies. Their inclusion in Palaeoniscidae is in most cases doubtful and requires confirmation by cladistic analyses. The listed taxa would imply that the temporal range of the family Palaeoniscidae stretched from the early Permian to the Cretaceous. If only species of Palaeoniscum are included, the temporal range of the family would be restricted to the middle-late Permian.[2][6]

References

  1. ^ .
  2. ^ a b c Schultze, Hans-Peter; Mickle, Kathryn E.; Poplin, Cécile; Hilton, Eric J.; Grande, Lance (2022). Handbook of Paleoichthyology 8A: Actinopterygii I. Dr. Friedrich Pfeil.
  3. ^ Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 129. Retrieved 31 December 2021.
  4. .
  5. ^ .
  6. ^ .
  7. .