Read the Beforeitsnews.com story here. Advertise at Before It's News here.
Profile image
Story Views
Now:
Last hour:
Last 24 hours:
Total:

Sinopterus? or Huaxiapterus? It gets confusing…

% of readers think this story is Fact. Add your two cents.


Thank goodness
for museum numbers.

Today the ZMNH M 8131 specimen first attributed to
Huaxiapterus corollatus (Lü et al. 2006) then renamed Sinopterus corollatus (Zhang et al. 2019; Figs. 1, 2) enters the the large pterosaur tree (LPT, 255 taxa) basal to tapejarids, derived from the Sinopterus atavismus specimen nesting basal to dsungaripterids.

Figure 1. Huaxiapterus corollatus ZMNH M 8131 reconstructed. An alternate m4.1 is provided that looks more like a m4.1 than a metacarpal 4. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-recon588.jpg?w=126″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-recon588.jpg?w=430″ class=”size-full wp-image-50961″ src=”https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-recon588.jpg?w=584&h=1390″ alt=”Figure 1. Huaxiapterus corollatus ZMNH M 8131 reconstructed. An alternate m4.1 is provided that looks more like a m4.1 than a metacarpal 4. ” width=”584″ height=”1390″ srcset=”https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-recon588.jpg?w=584&h=1390 584w, https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-recon588.jpg?w=63&h=150 63w, https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-recon588.jpg?w=126&h=300 126w, https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-recon588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 1. Huaxiapterus corollatus ZMNH M 8131 reconstructed. An alternate m4.1 is provided that looks more like a m4.1 than a metacarpal 4.

Sometimes specimens are reassembled slightly wrong.
In this case several long bones were accidentally reversed end-to-end in this otherwise stunning mount. One never knows what the original fossil looked like prior to reassembly. We don’t want to call these ‘fakes’. We do want to be aware of errors and artistic reconstructions as much as is possible.

Figure 2. The ZMNH specimen in situ and somewhat corrected for original perspective issues. The correction makes the wings the same length. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2020/11/huaxiapterus_sinopterus-corollatus_insitu588.gif?w=181″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2020/11/huaxiapterus_sinopterus-corollatus_insitu588.gif?w=584″ class=”size-full wp-image-50963″ src=”https://pterosaurheresies.files.wordpress.com/2020/11/huaxiapterus_sinopterus-corollatus_insitu588.gif?w=584&h=965″ alt=”Figure 2. The ZMNH specimen in situ and somewhat corrected for original perspective issues. The correction makes the wings the same length. ” width=”584″ height=”965″ />

Figure 2. The ZMNH specimen in situ and somewhat corrected for original perspective issues. The correction makes the wings the same length. Be wary of such wonderful-looking fossils. This specimen appears to have been reassembled. Some long bones are reversed end-to-end, which do not affect scoring.

Sinopterus – Huaxiapterus corollatus (Lü et al. 2006; Early Cretaceous, ZMNH M 8131) is another largely complete specimen with confusing nomenclature. This taxon nests at the base of the Tapejara, basal to the Aathal specimen (below). The pelvis is missing. The sternum is among the largest of all pterosaurs. The cervicals are longer creating a taller pterosaur.

From the Lü et al. abstract:
“A new species of tapejarid pterosaur, Huaxiapterus corollatus sp. nov. is erected on the basis of a nearly complete skull and postcranial skeleton from the Lower Cretaceous Jiufotang Formation of Liaoning Province, China. Huaxiapterus corollatus sp. nov. is characterized by a hatchet-shaped rectangular process on the premaxilla, whose short axis is perpendicular to the anterior margin of the premaxillae. Except for this process, other characters of the skull such as the breadth of the snout between the anterior margin of the nasoantorbital fenestra and the anterior margin of the premaxilla are similar to that of Huaxiapterus jii.”

Figure 3. Huaxiaptrus iii and Huaxiapterus corollatus to scale. These two do not nest next to one another in the LPT. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-jii_recon588-1.jpg?w=294″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-jii_recon588-1.jpg?w=584″ class=”size-full wp-image-50973″ src=”https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-jii_recon588-1.jpg?w=584&h=596″ alt=”Figure 3. Huaxiaptrus iii and Huaxiapterus corollatus to scale. These two do not nest next to one another in the LPT. ” width=”584″ height=”596″ srcset=”https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-jii_recon588-1.jpg?w=584&h=596 584w, https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-jii_recon588-1.jpg?w=147&h=150 147w, https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-jii_recon588-1.jpg?w=294&h=300 294w, https://pterosaurheresies.files.wordpress.com/2020/11/h-corollatus-jii_recon588-1.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 3. Huaxiaptrus iii and Huaxiapterus corollatus to scale. These two do not nest next to one another in the LPT.

The Lü et al. abstract continues
“Huaxiapterus and a second Chinese tapejarid, Sinopterus, share several unique cranial characters in common with Tapejara and these three genera appear to be more closely related to each other than to other azhdarchoids.

In the LPT azhdarchids nest with dorygnathids, not tapejarids. Adding these taxa missing from prior studies makes this inevitable.

“The Chinese tapejarids (Sinopterus and Huaxiapterus) have relatively elongate skulls and weakly developed cranial crests and seem to be less derived than Tapejara, with its shorter, deeper skull and large cranial crest. Tupuxuarids (Tupuxuara and Thalassodromeus) have often been associated with tapejarids in the family Tapejaridae, but this relationship is controversial because some phylogenetic analyses have supported the pairing of tupuxuarids with Azhdarchidae.”

Adding taxa moves Azhdarchidae away from tupuxuarids.

Figure 4. Tapejaridae in the LPT.

“We propose that Tapejaridae be restricted to Tapejara, Sinopterus and Huaxiapterus.”

The LPT does not support that proposal (Fig. 4). The Tapejaridae remains a monophyletic clade in the LPT derived from dsungaripterids, shenzhoupterids and earlier, germanodactylids… not azhdarchids.


References
Lü JC, Jin XS, Unwin DM, Zhao LJ, Azuma Y and Ji Q 2006. A new species of Huaxiapterus Pterosauria: Pterodactyloidea from the Lower Cretaceous of western
Liaoning, China with comments on the system atics of tapejarid pterosaurs. Acta Geol Sinica English 80: 315-326.
Zhang X, Jiang S, Cheng X and Wang X 2019. New material of Sinopterus (Pterosauria, Tapejaridae) from the Early Cretaceous Jehol Biota of China. Anais da Academia Brasileira de Ciencias 91(2):e20180756. DOI 10.1590/0001-3765201920180756.

wiki/Sinopterus
wiki/Huaxiapterus
reptileevolution.com/tapejaridae.htm



Source: https://pterosaurheresies.wordpress.com/2020/11/20/sinopterus-or-huaxiapterus-it-gets-confusing/


Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Please Help Support BeforeitsNews by trying our Natural Health Products below!


Order by Phone at 888-809-8385 or online at https://mitocopper.com M - F 9am to 5pm EST

Order by Phone at 888-388-7003 or online at https://www.herbanomic.com M - F 9am to 5pm EST

Order by Phone at 888-388-7003 or online at https://www.herbanomics.com M - F 9am to 5pm EST


Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!

HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation

Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.

MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser!  Cleans out toxic buildup with oxygen! 
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover -  Reduces Smart Meter radiation by 96%!  (See Video)

Immusist Beverage Concentrate - Proprietary blend, formulated to reduce inflammation while hydrating and oxygenating the cells.

Report abuse
Loading...

    Comments

    Your Comments
    Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

    MOST RECENT
    Load more ...

    SignUp

    Login

    Newsletter

    Email this story
    Email this story

    If you really want to ban this commenter, please write down the reason:

    If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.