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About Traditional Art / Professional Brian ChooMale/Australia Group :iconprehistory-alive: Prehistory-Alive
Bringing prehistory back to life
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Hongyu chowi by Gogosardina Hongyu chowi :icongogosardina:Gogosardina 169 8 Sparalepis tingi by Gogosardina Sparalepis tingi :icongogosardina:Gogosardina 168 11 The Leviathan of Beaumaris by Gogosardina The Leviathan of Beaumaris :icongogosardina:Gogosardina 275 43 Moythomasia lineata by Gogosardina Moythomasia lineata :icongogosardina:Gogosardina 144 11 Yi qi. Dragon of the Daohugou by Gogosardina Yi qi. Dragon of the Daohugou :icongogosardina:Gogosardina 311 67 Microbrachius dicki = Sex in the Devonian by Gogosardina Microbrachius dicki = Sex in the Devonian :icongogosardina:Gogosardina 133 30 Megamastax - the first vertebrate apex predator by Gogosardina Megamastax - the first vertebrate apex predator :icongogosardina:Gogosardina 306 31 TSoSC#4 = Lariosaurus goes for a stroll by Gogosardina TSoSC#4 = Lariosaurus goes for a stroll :icongogosardina:Gogosardina 306 37 Chengjiang Biota - the dawn of the vertebrates by Gogosardina Chengjiang Biota - the dawn of the vertebrates :icongogosardina:Gogosardina 208 22 Elephant bird = The Kiwi's lost cousin by Gogosardina Elephant bird = The Kiwi's lost cousin :icongogosardina:Gogosardina 148 24 Entelognathus #4: Study of a weird fish by Gogosardina Entelognathus #4: Study of a weird fish :icongogosardina:Gogosardina 100 6 Entelognathus #3: Shaking the tree by Gogosardina Entelognathus #3: Shaking the tree :icongogosardina:Gogosardina 59 8 Entelognathus #2: Evo from the fish's mouth by Gogosardina Entelognathus #2: Evo from the fish's mouth :icongogosardina:Gogosardina 57 8 Entelognathus #1: In the Silurian seas of Yunnan by Gogosardina Entelognathus #1: In the Silurian seas of Yunnan :icongogosardina:Gogosardina 197 35 TSoSC #3: The floating lily fields of Guanling by Gogosardina TSoSC #3: The floating lily fields of Guanling :icongogosardina:Gogosardina 542 65 TSoSC #2: Keichousaur-killer of Xingyi by Gogosardina TSoSC #2: Keichousaur-killer of Xingyi :icongogosardina:Gogosardina 473 53

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Hongyu chowi
2014+2017, acrylics on card, digital & photography

c.370,000,000, Late Devonian (Famennian), Ningxia, China (Zhongning Formation)

Illustration for Min Zhu, Per E. Ahlberg, Wen-Jin Zhao, and Lian-Tao Jia (2017) A Devonian tetrapod-like fish reveals substantial parallelism in stem tetrapod evolution. Nature Ecology & Evolutiondoi:10.1038/s41559-017-0293-5

A Late Devonian riverbed on the North China microcontinent, Hongyu erupts from the sand to snack on some passing Ningxialepis. The spiny armor of these small antiarchs is of little use against snapping jaws of this voracious ambush predator.

ANIMALS IN SCENE
Hongyu chowi = Tetrapodomorph sarcopterygian, 1.5 m long. A large and very unusual lobe-finned fish known from a single well preserved specimen comprising a partial skull (unfortunately missing most of the snout), pectoral girdle and vertebrae.

The anatomy throws a spanner into tetrapodomorph phylogeny as it presents of mosaic of supposedly basal and derived characters. For example, the robust shoulder girdle, broad flattened head and the contact between the supratemporal and extratemporal bones are characteristic of rhizodonts, forms that are considered close to the base of the tetrapodomorph radiation.

On the other hand, Hongyu has a truncated hyomandibular, big plate-like scapulacoracoids and a cleithrum that lacks a ventral lamina. These are characters seen in early tetrapods and tetrapod-like elpistostegalians such as Tiktaalik. Another odd feature, not mentioned in the paper, is the absence of a bony gill cover in the holotype. The the bones may have originally been present and become lost before preservation, but this seems odd given that the delicate gill arches are still in articulation. If Hongyu truly lacked a bony operculum (as I have reconstructed here), then this is yet another tetrapod-like character.

Not surprisingly, this new fish doesn't neatly fit anywhere in the established phylogenetic models. My gut feeling is that this is an unusual basal tetrapodomorph that has independently acquired tetrapod-like characters due to anatomical specialisation as a benthic ambush predator. Then again, perhaps this discovery means that rhizodonts are closer to the origin of tetrapods than we have previously recognised. 

Ningxialepis spinosa = small antiarch placoderm, 20 cm long. Jiangxilepid antiarch with serrated edges to the pectoral fins and a tall median dorsal spine.

Remigolepis major = large antiarch placoderm, 1.2 m long. Of the half-dozen or so species of Remigolepis present in the Zhongning Formation, R. major was the largest, exceeding 1 metre in length.
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We made this holoscape with pics we downloaded off Google images - spared no expense.

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Brian Choo
Artist | Professional | Traditional Art
Australia
An Australian vertebrate palaeontologist. I mainly work on Silurian-Devonian fishes, especially basal actinopterygians.
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gwfb5 Featured By Owner Nov 21, 2017
Happy Birthday!
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Willy276 Featured By Owner Nov 21, 2017
Happy Birthday!
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Evodolka Featured By Owner Nov 21, 2017  Hobbyist General Artist
happy birthay
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Braindroppings1 Featured By Owner Nov 21, 2017  Hobbyist Traditional Artist
Happy birthday!
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CaptFlameSkull Featured By Owner Nov 21, 2017  Student General Artist
Happy birfday! hope you have (or had) a good one!
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