Robustichthys Explained

Robustichthys is an extinct genus of ray-finned fish from the Middle Triassic period, contains only one species R. luopingensis.[1] [2] 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.[3]

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, which makes it the largest holostean fish in the Middle Triassic.

Notes and 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 . 10.1098/rsbl.2014.0204 . 24872460 . 4046378 . 1744-9561.
  2. Xu . Guang-Hui . 2019-06-24 . Osteology and phylogeny of Robustichthys luopingensis, the largest holostean fish in the Middle Triassic . PeerJ . en . 7 . e7184 . 10.7717/peerj.7184 . 31275762 . 6596411 . 2167-8359 . free .
  3. López-Arbarello . Adriana . Sferco . Emilia . Neopterygian phylogeny: the merger assay. . Royal Society Open Science . March 2018 . 5 . 3 . 172337 . 10.1098/rsos.172337. 29657820 . 5882744 . 2018RSOS....572337L . free.

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