Ticinolepis crassidens revisited, again.
More revisions.
This is how it goes when you try to reconstruct a fish skull, like Ticinolepis crassidens, that has seen a bit of facial bone dislocation and tessalation (Fig 1).
DGS (= coloring the bones) is helpful
because it avoids freehand, avoids arrows and abbreviations, is replicable by other workers, and brings out errors if elements don’t fit they way do in tentatively related taxa. It’s a learning tool currently enjoying wider use in µCT scans.
This is what it means to ‘manipulate in Photoshop’, a practice the Wikipedia author meant to imply something other than an attempt at precision reconstruction without a pencil and paper.
Figure 2. The skull of Ticinolepis crassidens (MCSN 8072) in situ from López-Arbarello 2016, traced and reconstructed using DGS methods.
” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2024/04/ticinolepis-crassidens-pimuz-t-273skull588.jpg?w=154″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2024/04/ticinolepis-crassidens-pimuz-t-273skull588.jpg?w=524″ class=”size-full wp-image-85433″ src=”https://pterosaurheresies.files.wordpress.com/2024/04/ticinolepis-crassidens-pimuz-t-273skull588.jpg?w=584&h=1140″ alt=”Figure 2. The skull of Ticinolepis crassidens (MCSN 8072) in situ from López-Arbarello 2016, traced and reconstructed using DGS methods. ” width=”584″ height=”1140″ srcset=”https://pterosaurheresies.files.wordpress.com/2024/04/ticinolepis-crassidens-pimuz-t-273skull588.jpg?w=584&h=1140 584w, https://pterosaurheresies.files.wordpress.com/2024/04/ticinolepis-crassidens-pimuz-t-273skull588.jpg?w=77&h=150 77w, https://pterosaurheresies.files.wordpress.com/2024/04/ticinolepis-crassidens-pimuz-t-273skull588.jpg?w=154&h=300 154w, https://pterosaurheresies.files.wordpress.com/2024/04/ticinolepis-crassidens-pimuz-t-273skull588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Ticinoelpis crassidens now nests far apart
from Ticinolepis longaeva (Fig 4) which lacks builbous palatine teeth and has many other distinct traits. So the two are not congeneric. I know of (= tested in the LRT) no other fish with such palatine teeth and other traits.
Figure 2. Narcetes from Fujiwara et al 2021. Compare to Prohalecites in figure 3.
” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2021/03/slickhead-narcetes-invivo_overall588.jpg?w=300″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2021/03/slickhead-narcetes-invivo_overall588.jpg?w=584″ class=”size-full wp-image-54455″ src=”https://pterosaurheresies.files.wordpress.com/2021/03/slickhead-narcetes-invivo_overall588.jpg?w=584&h=310″ alt=”Figure 2. Narcetes from Fujiwara et al 2021. Compare to Prohalecites in figure 3.” width=”584″ height=”310″ srcset=”https://pterosaurheresies.files.wordpress.com/2021/03/slickhead-narcetes-invivo_overall588.jpg?w=584&h=310 584w, https://pterosaurheresies.files.wordpress.com/2021/03/slickhead-narcetes-invivo_overall588.jpg?w=150&h=80 150w, https://pterosaurheresies.files.wordpress.com/2021/03/slickhead-narcetes-invivo_overall588.jpg?w=300&h=159 300w, https://pterosaurheresies.files.wordpress.com/2021/03/slickhead-narcetes-invivo_overall588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Ticinoelpis crassidens
(López-Arbarell, Bürgin, Furrer and Stockar 2016, PIMUZ T 273, Triassic, 240 mya) this species has large, bulbous, crushing palatine teeth. Extant Narcetes (Fig 2) from Arctic waters is relative in the LRT.
Ticinolepis longaeva (Fig 4) is closer to Robustichthys.
Figure 3. This specimen, wrongly attributed to Pholidophorus, is also close to Ticinolepis crassidents and is similar in age/antiquity.
” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2024/04/pholidophorus2-588.jpg?w=300″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2024/04/pholidophorus2-588.jpg?w=584″ class=”size-full wp-image-85444″ src=”https://pterosaurheresies.files.wordpress.com/2024/04/pholidophorus2-588.jpg?w=584&h=325″ alt=”Figure 3. This specimen, wrongly attributed to Pholidophorus, is also close to Ticinolepis crassidents and is similar in age/antiquity. ” width=”584″ height=”325″ srcset=”https://pterosaurheresies.files.wordpress.com/2024/04/pholidophorus2-588.jpg?w=584&h=325 584w, https://pterosaurheresies.files.wordpress.com/2024/04/pholidophorus2-588.jpg?w=150&h=83 150w, https://pterosaurheresies.files.wordpress.com/2024/04/pholidophorus2-588.jpg?w=300&h=167 300w, https://pterosaurheresies.files.wordpress.com/2024/04/pholidophorus2-588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Apologies for earlier mistakes on this taxon.
It takes time to get to know certain specimens and fish in general.
The original authors, López-Arbarello, Bürgin, Furrer and Stockar 2016,
reported, “The anatomy of this fish shows a mosaic of halecomorph and ginglymodian characters and, thus, the new taxon probably represents a basal holostean.”
The authors did not attempt a DGS reconstruction or phylogenetic analysis
The authors concluded,
“Among them [= more than a hundred specimens], it was not possible to identify 37 specimens beyond the generic level, but the remaining fishes were classified in two new species: T. longaeva (48 specimens) and T. crassidens (20 specimens).
Even among fish experts, It takes time to get to know certain specimens and fish in general. Please report any observable errors if corrections are warranted.
References
López-Arbarello A, Bürgin T, Furrer H and Stockar R 2016. New holostean fishes (Actinopterygii: Neopterygii) from the Middle Triassic of the Monte San Giorgio (Canton Ticino, Switzerland). PeerJ 4(e2234):1-61.
Source: https://pterosaurheresies.wordpress.com/2024/04/20/ticinolepis-crassidens-revisited-again/
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.
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.
LION'S MANE PRODUCT
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.