Biology:Scalacurvichthys

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Short description: Genus of pycnotontinae fish from the Late Cretaceous

Scalacurvichthys
Temporal range:
Cenomanian, 100.5–93.9 Ma
Image of SMNK-PAL. 8613.jpg
Image and camera lucidia drawing of the holotype (SMNK-PAL. 8613)
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Pycnodontiformes
Family: Pycnodontidae
Subfamily: Pycnodontinae
Genus: Scalacurvichthys
Cawley, and Kriwet 2017
Type species
Scalacurvichthys naishi
John Cawley, and Jürgen Kriwet, 2017

Scalacurvichthys (IPA: [ˌskäːɫäˈkʊrvikʰtʰys]) (meaning "curved scale fish") is an extinct genus of pycnodontine pycnodontiform fish from the Amminadav Formation or Bet-Meir Formation in the West Bank; Palestine. The type species is S. naishi, only known from the holotype.[1]

Etymology

The generic name, Scalacurvichthys (IPA: [ˌskäːɫäˈkʊrvikʰtʰys]), is derived from the Latin words 'scala' and 'curva'. 'Scala' translates to scale, and 'curva' translates to curved. This is in reference to the raised, anterior-facing first dorsal ridge scale protruding above the skull roof. And the Greek word 'ἰχθύς' which translates to fish. The specific name, naishi (IPA: [ˌneɪʃˈaɪ]), is dedicated to Dr. Darren Naish, who is a prominent palaeontologist and the founder of the vertebrate palaeozoology blog Tetrapod Zoology, and its accompanying convention TetZooCon.[2][1]

Description

Scalacurvichthys is known only from the holotype, SMNK-PAL. 8613, which was described by Cawley and Kriwet (2017). The holotype measures at around 12.3 cm (4.8 in) in length. It consists of an almost completely and fully articulated specimen, however, it is lacking some cranial and postcranial details due to taphonomic processes. Several morphological elements, especially of the postcranial skeleton, are preserved and recognizable only as imprints.[1]

Classification

In their phylogenetic analysis, Cawley and Kriwet (2017) recovered Scalacurvichthys amongst the pycnodontine grade of pycnodontiforms, most closely related to Oropycnodus and other pycnodontines. The following cladogram represents the phylogenetic results of a consensus tree, with unordered characters based on the modified database of Poyato-Ariza and Wenz (2002).[3] The original tree used several members outside of Pycnodontidae and Pycnodontiformes as an outgroup, however, for the sake of simplicity, only members of Pycnodontidae are shown below.[1]

Pycnodontidae

Stenamara

Turbomesodon bemissartensis

Turbomesodon praeclarus

Turbomesodon relegans

Anomoeodus

Stemmatodus

Coelodus subdiscus

Coelodus satumus

Iemanja

Tepexichthys

Proscinitinae

Pycnodontinae

Scalacurvichthys

Oropycnodus

Pychnodus

Nursallia veronae

Paranursallia

Abdobalistum

Nursallia? goedeli

Palaeobalistum

References

  1. 1.0 1.1 1.2 1.3 Cawley, John; Kriwet, Jürgen (14 June 2017). "A new pycnodont fish, Scalacurvichthys naishi gen. et sp. nov., from the Late Cretaceous of Israel". Journal of Systematic Palaeontology 16 (8): 659–673. doi:10.1080/14772019.2017.1330772. PMID 29551954. 
  2. "TetZooCon" (in en-GB). http://tetzoo.com/convention/. 
  3. Poyato-Ariza, Francisco; Wenz, Sylvie (January 2002). "A new insight into pycnodontiform fishes". Geodiversitas. https://www.researchgate.net/publication/40662849. Retrieved 10 November 2023. 


Wikidata ☰ Q123420861 entry