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Robustichthys Temporal range: Anisian PreꞒ Ꞓ O S D C P T J K Pg N
Fossil specimens, (A) IVPP V18568 (holotype), (B) IVPP V20416
Reconstruction
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Clade:	Halecomorphi
Order:	†Ionoscopiformes
Genus:	†Robustichthys Xu et al., 2014
Type species
†Robustichthys luopingensis Xu et al., 2014

Robustichthys is an extinct genus of ray-finned fish from the Middle Triassic period, contains only one species R. luopingensis. It belonged to the clade Halecomorphi, which were once diverse during the Mesozoic Era, but which are today represented by only a single species, the bowfin. Halecomorphs are holosteans, a clade which first appeared in the fossil record during the Triassic.

Description

Robustichthys is described from Anisian Guanling Formation, Luoping, Yunnan, China. It is the oldest member of Ionoscopiformes, an order within Halecomorphi. The largest specimen reaches length about 36 cm (1.18 ft), which makes it the largest holostean fish in the Middle Triassic.

References

1. ^ Xu, Guang-Hui; Zhao, Li-Jun; Coates, Michael I. (May 2014). "The oldest ionoscopiform from China sheds new light on the early evolution of halecomorph fishes". Biology Letters. 10 (5): 20140204. doi:10.1098/rsbl.2014.0204. ISSN 1744-9561. PMC 4046378. PMID 24872460.
2. ^ Xu, Guang-Hui (2019-06-24). "Osteology and phylogeny of Robustichthys luopingensis, the largest holostean fish in the Middle Triassic". PeerJ. 7: e7184. doi:10.7717/peerj.7184. ISSN 2167-8359. PMC 6596411. PMID 31275762.
3. López-Arbarello, Adriana; Sferco, Emilia (March 2018). "Neopterygian phylogeny: the merger assay". Royal Society Open Science. 5 (3): 172337. Bibcode:2018RSOS....572337L. doi:10.1098/rsos.172337. PMC 5882744. PMID 29657820.

v t e Halecomorphi
Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Subclass: Neopterygii Infraclass: Holostei Actinopterygii see Actinopterygii Neopterygii see Neopterygii Halecomorphi see below↓ Halecomorphi
Halecomorphi †Angolaichthys? †Cipactlichthys †Peia? †Promecosomina? †Prosantichthys †Parasemionotidae Albertonia Broughia Candelarialepis Devillersia Icarealcyon Jacobulus Jurongia Lehmanotus Lombardina? Ospia Parasemionotus Piveteaunotus Qingshania Stensionotus Suius Thomasinotus Watsonulus †Ionoscopiformes Ainia Allolepidotus? Altmuehlfuro Archaeosemionotus Asialepidotus? Brachyichthys Cerinichthys Elongofuro Eoeugnathus? Furo Gymnoichthys? Heterolepidotus Holzmadenfuro Italophiopsis Ohmdenfuro Oligopleurus? Ophiopsis Panxianichthys? Robustichthys? Sanctusichthys Schernfeldfuro Sinoeugnathus? Subortichthys Xingyia? Zandtfuro Ionoscopidae Ionoscopus Oshunia Quetzalichthys Spathiurus Ophiopsiellidae Congophiopsis Macrepistius Ophiopsiella Petalopteryx Placidichthys Teoichthys Amiiformes †Caturoidea Eurypoma Liodesmus Strobilodus Caturidae Amblysemius Caturus Catutoichthys Amioidea †Tomognathus †Sinamiidae Ikechaoamia Siamamia Sinamia Amiidae Amia †Amiopsis †Calamopleurus †Cratoamia †Cyclurus †Hispanamia †Maliamia †Melvius †Nipponamia †Pachyamia †Pseudamiatus †Solnhofenamia †Vidalamia

This article about a prehistoric ray-finned fish is a stub. You can help Misplaced Pages by expanding it.

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• Ionoscopiformes
• Prehistoric ray-finned fish genera
• Middle Triassic life
• Anisian life
• Triassic bony fish
• Fossil taxa described in 2014
• Triassic fish of Asia
• Guanling Formation
• Prehistoric ray-finned fish stubs