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JTCatskills

Winged insect or scales? Or not fauna at all?

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JTCatskills

Hi all.  We found this on the rocky Pacific Ocean beaches about 50 miles south of Mendocino, CA.  To my untrained eye it looks like a winged insect or perhaps scales.  Or am I seeing what I want to see? ;)  The photos give dimension and one shot is 7X macro.  Any thoughts or comments are always greatly appreciated!

 

 

IMG_3007.jpg

IMG_3017.jpg

IMG_3054.jpg

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RyanDye

Yes, an echinoid for sure. The middle pattern makes it a fairly easy to identify. Nice photography new members often have problems with getting clear images making it harder to ID.

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JTCatskills

Thank you Virgilian, Fossildude19 and Ryan Dye.  Much appreciated!   And thanks, Ryan, for the compliment on the photogs.  

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Coco
17 hours ago, JTCatskills said:

IMG_3054.jpg

 

 

I confirm that it is a sea urchin fossil, doubtless an internal mold. What you see there is called interambulacral plates.

 

Coco

 

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Plantguy

Neat find. We used to find sand dollars from San Fran northward that had a similar preservation. I always liked how the plate outlines were very distinct and showy. Might be the Scutellaster genus that shows up in alot of the Pliocene outcrops.

 

Regards, Chris

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Roberta NJ CA

I have several of these which I found in Northern CA, Pacifica.. Thanks I now know what they are!

Roberta

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Roberta NJ CA

Hi all,  speaking of sand dollars, is it true that every sand dollar contains five "dove-like" shells inside.. I've found that to be true (broken many) and if so what are they?

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abyssunder
1 hour ago, Roberta NJ CA said:

Hi all,  speaking of sand dollars, is it true that every sand dollar contains five "dove-like" shells inside.. I've found that to be true (broken many) and if so what are they?

The "dove-like" shells inside might be parts of the "Aristotle's lantern", so the mouth region of echinoids. I think, you are referring to the "Pyramids". :)

 

more details here

 

LanternBooth.jpg.965082bb8873a0bb0bdd0cbf8d807b8b.jpg

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Roberta NJ CA

Yes! I see it... wow that's amazing (and cool!)   Thanks Abyssunder :D

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