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(01-17-2025, 03:46 PM)return 80 Wrote: Hello everyone, Wildfact Forum friends.
I am an enthusiast of vertebrate paleontology and a writer of online popular science articles. Recently, while conducting data analysis, I had the opportunity to measure the Siberian tiger skull cast of Boneclones. My friend suggested that I share some data on Wildfact, which may be of great interest to some Wildfact Forum.
*This image is copyright of its original author
I previously sent the data to another post, but it seems that it did not pass the auditing, so I am sharing the relevant data here. If there is any offense, I will delete this reply
11.mandible length (infradentale -middle of condyle) :237.5mm
12.mandible height before p3: 44.7mm
13.mandible height after m1:49.5mm
14. maximum crown length of P4: 33.8mm
15. maximum crown length of m1: 25.5mm
I used digital calipers and metal calipers for measurement, with 2-3 observers observing whether the measurements were aligned with the correct measurement points. Each data was measured more than 3 times. My measurement accuracy is 0.01mm, with a retention accuracy of 0.1mm. Measurement values exceeding 200mm will undergo accuracy calibration
*This image is copyright of its original author
Hi Return80,
Regarding the Boneclones Siberian tiger skull replica, is that yours?
The way you include two measuring tapes in your measurements is excellent. You photographed the measuring tape from the back of the skull and front directly and then also included the 10 cm scale beside the skull under the skull give me an indirect way to measure this skull of another Siberian tiger named Altai from the Koln Zoo, Germany as we can see the photo below.
*This image is copyright of its original author
I wonder if you can take another shot of the Boneclones Siberian tiger skull replica with the same exact angle as the photo above. If you look closely, most people capture photos of big cat skulls with the nasal holes visible but the above photo didn't show visible nasal holes. Maybe to avoid photo angle distortion?
Hi johnny rex,
Thanks for your reply,this skull cast is still housed in a storage room which I could visit currently.So before my internship starts next week, I can take skull photo for you from a similar angle.
*This image is copyright of its original author
I have chosen the image that best matches the actual skull shape for you.Based on a 10cm scale at the bottom, I measured the approximate size of the skull using image measurement software. The greatest skull length measured by imaging is 423mm, which is much larger than the actual 378mm.
However, it should be noted that the distance of photography and the angle of the lens can have a significant impact on the imaging and related scale, so it can even reach up to 44cm GSL at approximate lens angles.
regarding the Koln Zoo skull,I have read the related report(<Two fatal tiger attacks in zoos>, DOI 10.1007/s00414-015-1216-0).
In Fig.2, they aligned the scale bar with the right side of Rostrum at the same position. We can use software roughly measure the Rostral breadth based on Fig.2, and the value I obtained is approximately 99mm, which seems to be consistent with the wound in Fig.1. If we substitute this data into Fig.3 again, the GSL obtained is approximately 345mm.
In my opinion, the size inferred from multiple reliable images may be closer to the actual size than the size inferred solely from Fig.3
*This image is copyright of its original author
*This image is copyright of its original author
In PER CHRISTIANSEN and JOHN M. HARRIS 2009(DOI: 10.1671/039.029.0314),They analyse 78 tiger skulls.To tigers,the nasal holes(Incisive foramina) is"not visible, or only anterior-most portion visible in dorsal view".So,may the most Tiger skulls didn't show visible nasal holes in dorsal view.
The Boneclones skull is somewhat special in some structural aspects, with a very short nasal bone ratio and the greatest length of nasal measured in straight line (see Ji H.mazák 2008)only 101.5mm,nasal middle line only 77.5mm.So its nasal holes are easily visible in the Dorsal view
You can also find this condition in the photos,the skull nasal frontal suture is not posterior to the level of the maximal frontal suture.(Generally speaking, this is common in most lion skulls, but not frequent in tiger skulls).
(01-17-2025, 03:46 PM)return 80 Wrote: Hello everyone, Wildfact Forum friends.
I am an enthusiast of vertebrate paleontology and a writer of online popular science articles. Recently, while conducting data analysis, I had the opportunity to measure the Siberian tiger skull cast of Boneclones. My friend suggested that I share some data on Wildfact, which may be of great interest to some Wildfact Forum.
*This image is copyright of its original author
I previously sent the data to another post, but it seems that it did not pass the auditing, so I am sharing the relevant data here. If there is any offense, I will delete this reply
11.mandible length (infradentale -middle of condyle) :237.5mm
12.mandible height before p3: 44.7mm
13.mandible height after m1:49.5mm
14. maximum crown length of P4: 33.8mm
15. maximum crown length of m1: 25.5mm
I used digital calipers and metal calipers for measurement, with 2-3 observers observing whether the measurements were aligned with the correct measurement points. Each data was measured more than 3 times. My measurement accuracy is 0.01mm, with a retention accuracy of 0.1mm. Measurement values exceeding 200mm will undergo accuracy calibration
*This image is copyright of its original author
Hi Return,
Never saw this post. If you have info about skulls and bones, post it in 'On the edge of extinction - The Tiger (Panthera tigris)'. Tell the mods you've permission to post there. If you have more photographs, please post them.
Hi peter,
Thanks for your friendly reply and suggestions!
I will post more skulls and related data during sparetime
Who is the "king" of tigers? - Bengal or Amur
