Ask a Question
  
  
  
Top Posters
Since Sunday
23
23
21
18
17
16
16
15
15
15
14
14
New Topic  
wrote...
Posts: 6
Rep: 0 0
A month ago
Hi,
I'm traveling through New Zealand and found a little schell/amor on the beach on the east-coast of New Zealands northern island. It's around  3cm long. At first I thought it would be a creb shell but if you look closely you can see some skin left on the edge wich looks scaly like skin from reptiles. So I thought it can't be a shellfish.
I hope someone can help me finding out what kind of animal this shell belongs to!

Thanks in advance,
Robin
Attached file(s)
Thumbnail(s):
You must login or register to gain access to these attachments.
Read 205 times
9 Replies
Replies
wrote...
Educator
A month ago
Reminds me of this



Morphological differences in shell characteristics and head colouration patterns of Malayemys khoratensis (orange), Malayemys macrocephala (blue), Malayemys subtrijuga (green).
Source https://doi.org/10.1371/journal.pone.0153108.g007
The best way to say thank you is with a positive review:

  https://trustpilot.com/review/biology-forums.com 

Your support goes a long way!


Make a note request here
wrote...
A month ago
Reminds me of this Morphological differences in shell characteristics and head colouration patterns of Malayemys khoratensis (orange), Malayemys macrocephala (blue), Malayemys subtrijuga (green).

Thank you for the answer! but the shell i found looks very different from that. it has multiple segments, not like tortoise usually have. (as far as I know) it's also a little bit movable.
wrote...
Staff Member
A month ago
What's interesting is that it looks like scales on the side of the specimen. Does the hard part feel kertinized like a turtle's shell or chalky like a crustaceans shell? I'm doubting it's a turtle's shell because there's no evidence of a spine or ribs from the inside view (shown below)

- Master of Science in Biology
- Bachelor of Science (Biology)
- Bachelor of Education
wrote...
A month ago
What's interesting is that it looks like scales on the side of the specimen. Does the hard part feel kertinized like a turtle's shell or chalky like a crustaceans shell? I'm doubting it's a turtle's shell because there's no evidence of a spine or ribs from the inside view (shown below)

Thanks for the answer! I would say it's more like keratinized and it's pretty solid. I can't imagine it's from a crustaceans because of the scaly skin. Maybe the spine isn't that distinctive because it came from a very young animal? Also by looking pictures of turtle's skeleton on google I saw some with less visable spine...
But I never saw a turtle with such a shell!
wrote...
A month ago
Solved!!
someone in a different forum answerd me:
It's a Chiton!
Very interesting animals!

https://en.wikipedia.org/wiki/Chiton?wprov=sfla1
wrote...
Educator
A month ago
Good call, the mystery is over

https://epod.usra.edu/blog/2005/07/chitons-on-bermuda.html

Thanks for the update
The best way to say thank you is with a positive review:

  https://trustpilot.com/review/biology-forums.com 

Your support goes a long way!


Make a note request here
Answer rejected by topic starter
wrote...
A month ago
The "scall" are no scall, it's hundreds of eyes!!
wrote...
Educator
A month ago
Are you certain they have the ability to "see"? They're so primitive looking, and the source I linked above says they're from the cambrian, 500 million years ago!
The best way to say thank you is with a positive review:

  https://trustpilot.com/review/biology-forums.com 

Your support goes a long way!


Make a note request here
wrote...
A month ago Edited: A month ago, Robio
Are you certain they have the ability to "see"? They're so primitive looking, and the source I linked above says they're from the cambrian, 500 million years ago!

I read on Wikipedia that they have ocelli, wich are photoreceptor cells beneath an argonit-based lense, but because they have hundrets of them they are able to see at least good enough to differentiate between a predators shadow and other changes in light like clouds.
Source https://en.wikipedia.org/wiki/Chiton?wprov=sfla1
New Topic      
Share This Topic
Similar topics that might interest you...
News Articles and Discussion   7 years ago   bio_man   503 Views
Developmental Psychology   A year ago   k_deshotels   jonjon2019   1 Reply   11 Views
Family Studies   A year ago   xxFalconArasxx   Tuntun   1 Reply   14 Views
Geography and Earth Sciences   A year ago   sarthaknitw   nudelosr   1 Reply   20 Views
4 More
Explore
Post your homework questions and get free online help from our incredible volunteers.
Learn More
Improve Grades
Help Others
Save Time
Accessible 24/7
  137 People Browsing
Related Images
 4805
 486
 14