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Title: Wat kind of animal is it? Post by: Robio on Dec 14, 2018 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 Title: Re: Wat kind of animal is it? Post by: bio_man on Dec 14, 2018 Reminds me of this
(https://biology-forums.com/gallery/39/6_14_12_18_10_32_21.png) (https://biology-forums.com/index.php?action=gallery;sa=view&id=39724) Morphological differences in shell characteristics and head colouration patterns of Malayemys khoratensis (orange), Malayemys macrocephala (blue), Malayemys subtrijuga (green). Title: Re: Wat kind of animal is it? Post by: Robio on Dec 14, 2018 Reminds me of this (https://biology-forums.com/gallery/39/6_14_12_18_10_32_21.png) (https://biology-forums.com/index.php?action=gallery;sa=view&id=39724) 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. Title: Re: Wat kind of animal is it? Post by: duddy on Dec 14, 2018 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)
(https://i.pinimg.com/originals/63/41/89/634189e8c7acbfda51a4ac8cb3990db9.jpg) Title: Re: Wat kind of animal is it? Post by: Robio on Dec 15, 2018 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) (https://i.pinimg.com/originals/63/41/89/634189e8c7acbfda51a4ac8cb3990db9.jpg) 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! Title: Re: Wat kind of animal is it? Post by: Robio on Dec 16, 2018 Solved!!
someone in a different forum answerd me: It's a Chiton! Very interesting animals! https://en.wikipedia.org/wiki/Chiton?wprov=sfla1 Title: Re: Wat kind of animal is it? Post by: bio_man on Dec 16, 2018 Good call, the mystery is over
https://epod.usra.edu/blog/2005/07/chitons-on-bermuda.html Thanks for the update Title: Re: Wat kind of animal is it? Post by: Robio on Dec 16, 2018 The "scall" are no scall, it's hundreds of eyes!!
Title: Re: Wat kind of animal is it? Post by: bio_man on Dec 16, 2018 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!
Title: Re: Wat kind of animal is it? Post by: Robio on Dec 17, 2018 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. |