Real keichousaurus? Quality of preparation? Complete?

[mr.rod]

Hello all,

I'm interested in these keichousaurus brothers. The seller has reserved the matrix for me, and I would love to understand some things before I buy. Better first ask to avoid bad surprises later ;-)

Hope some of the experts here can support me.

My questions are

1. Is it an original/authentic fossil and not a replica? Guess it is original ;-)
2. The quality of preparation seems to be below average?
3. What is this untypical light-grey cloud around the right brother? Cheap prep?
4. It looks a bit flat to me, not really 3d-look bones, is this from erosion?
5. Is it complete or can you see any enhancement, paint or retouch been made?

Thanks a lot everyone in advance.

mr.rod

[mr.rod]

To explain what I mean with flat, as mentioned in my question 4.

This is a really spatial 3d-look specimen where bones look like bones

[SomethingIsFishy]

I think #4 happened because the fossil got compressed and flattened millions of years ago.

[FranzBernhard]

6 hours ago, mr.rod said:

• 1 Is it an original/authentic fossil and not a replica? Guess it is original ;-)
• 2 The quality of preparation seems to be below average?
• 3 What is this untypical light-grey cloud around the right brother? Cheap prep?
• 4 It looks a bit flat to me, not really 3d-look bones, is this from erosion?
• 5 Is it complete or can you see any enhancement, paint or retouch been made?

1 Yes, authentic.

2 Acid + mechanical prep. Not very good, but I have seen much worse. I don´t know the average .

3 Looks like this part is affected by weathering. Especially visible at the side views.

4 Could be from poor prep, with bones partially ground away.

5 Don´t know.

Franz Bernhard

[Bobby Rico]

I like them, not the best prep but not the worst . I get the feeling  that it may have paint on it but the photos are out of focus so hard to be 100% . If there is paint I think its  will be to cover up some of prep work’s failings.
 

@Fossildude19 is good at spotting the pitfalls on theses fossils .

Edited December 27, 2022 by Bobby Rico

[Fossildude19]

I think these are real, not the greatest prep, and maybe a bit of paint on at least one, maybe both.

Usually, most of the affordable ones have some paint, at least.

All in all, I think these look pretty good to me.

[mr.rod]

Got additional pictures which convince me 100% to buy

Thanks everyone!

[FranzBernhard]

The first of the new pics nicely shows the etched impure limestone matrix, brush streaks from the wire brush or another tool and some "faceted" bones as a result of mechanical prepping.

Franz Bernhard

[mr.rod]

Thanks a lot for the load of information. Will see the seller to get these two guys. I'm so curious to hold them in my hands.

[mr.rod]

May I ask the question of the sex of those two saurus? As far as I have studied online, the right one should be a young male, and the lower one an adult female, right? Maybe mom and her boy ...

 

And interesting, reading Wikipedia, this species has grown up to 16.1 centimetres (6.3 inch) SVL, so including the tail that is around 24-25cm.

My two saurus are about 22 and 27cm, which is larger. And some saurus online are even 35cm.

How can that happen?

 

Thanks everyone.

[Fossildude19]

35 minutes ago, mr.rod said:

And interesting, reading Wikipedia, this species has grown up to 16.1 centimetres (6.3 inch) SVL, so including the tail that is around 24-25cm.

My two saurus are about 22 and 27cm, which is larger. And some saurus online are even 35cm.

How can that happen?

 

Thanks everyone.

 

 

Wikipedia is not a great source for factual information, but my take from reading that article is that they are talking about on average. There will always be exceptions to the average for many varying reasons.  You need to check out scientific papers regarding Keichousaurus hui.

 

LINK 1

LINK 2

 

[mr.rod]

21 hours ago, mr.rod said:

As far as I have studied online, the right one should be a young male, and the lower one an adult female, right? Maybe mom and her boy ...

 

What do you think? Any experts here?

Thanks everyone.

[mr.rod]

Hello all,

 

Can anyone tell if those two are a young male (right) and an adult female (bottom)?

Bought those and am very curious to know.

Thank you all very much.

 

[mr.rod]

Have opened a new discussion to keep the topics and their headings consistent. Thanks all.

[Fossildude19]

Topics Merged.

Discussion of one fossil should be kept together, in one topic.

[mr.rod]

Okay, sorry and thank you.

[Crazyhen]

On 12/27/2022 at 2:41 PM, FranzBernhard said:

1 Yes, authentic.

2 Acid + mechanical prep. Not very good, but I have seen much worse. I don´t know the average .

3 Looks like this part is affected by weathering. Especially visible at the side views.

4 Could be from poor prep, with bones partially ground away.

5 Don´t know.

Franz Bernhard

For the "light grey cloud" of the right one, I would say the pale colour is a result of acid prepping of the matrix, when the acid eroded and reacted with the matrix, it would result in pale colour.

 

If my guess is correct, the right one is a male, and the left one is a female.  However, it is unlikely that they are "related", they just happened to be fossilized at the same time near each other.

Edited January 10 by Crazyhen

[mr.rod]

Thanks a lot, @Crazyhen.

 

So we get the same understanding from reading the scientific papers, great.

With regards to the cloud, the seller now stated this is "because this one lays deeper in the matrix and the grey area is the part which goes deeper".

[Crazyhen]

17 hours ago, mr.rod said:

Thanks a lot, @Crazyhen.

 

So we get the same understanding from reading the scientific papers, great.

With regards to the cloud, the seller now stated this is "because this one lays deeper in the matrix and the grey area is the part which goes deeper".

Different layers do have different colour darkness, and that the right one was embedded at a slightly deeper layer  Note the plate has both dark and pale parts, indicating the mixed matrix materials.  But, the paler colour in my view is largely a result of acid reaction with the matrix when the plate was prepped.  It doesn't affect the quality of the Keichousaurus.  Of course, as I have showed in the forum a few times, the best specimens of Keichousaurus are those in "natural forms" in which no prepping is required, though they are relatively uncommon and seldom available in the online platform.

[mr.rod]

Have received lady Kei & boy Chou (how we call those two). Absolutely amazing. Relief (spatial 3d-look) is far better than what you assume from the pictures. Will try to soon create some short video which better displays the beauty.

 

Edited January 12 by mr.rod

[mr.rod]

As promised the video (180 MB @ HD) via my Dropbox. Will delete after about one month. Enjoy.

We love it. And You?

--

Update: deleted from Dropbox and made available for you on Youtube --> video embedded below.

Edited January 13 by mr.rod

[JohnJ]

5 minutes ago, mr.rod said:

Will delete after about one month. Enjoy.

Unfortunately, this adds nothing but frustration to anyone reading this topic when the video is deleted.  

 

Posting images will ensure some idea why you enjoy your new fossil.  

[mr.rod]

3 hours ago, JohnJ said:

Unfortunately, this adds nothing but frustration to anyone reading this topic when the video is deleted.  

 

Posting images will ensure some idea why you enjoy your new fossil.  

 

Okay, I found a better solution that is not filling up my Dropbox. Here the video for longer-term access:

 

 

And I add some nice pictures for you as well: