Pls help. >450 million yrs.

[aardvark]

1st post (and fossil newbie).

What is it ?

Any ideas appreciated !

1 inch long, high rotational symmetry along long axis.

Location: Montreal, Canada

Probable:
>450 million years (Trenton Calcium Carbonate; Middle or late ordovician).

Thanks !
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[Editted by aardvark on 23-07-2007 at 05:35 GMT +1]

[KarelS]

Hey Aardvark,

No idea what this is.

Maybe if you could post more pics, 2 or 3 sides, top, bottom, etc.

gr.

Charles

[Trilobite]

Looks a bit like a trilobite.

Edit: though, I don\'t see any recocnizable eyes, maybe it\'s a blind one.

[Bewerkt door Trilobite op 19-08-2007 om 21:51 NL]

[aardvark]

Finally found it on the web.

Anyone have ANY more info ?? Thanks in advance.

This is from a similar formation 3 hrs drive away west of Albany, NY, USA.

ONCOCERIDA

Eorizoceras (sp. Flower, 1943 - Description from Sweet, 1964b)

Description: Shell is apically curved, adorally straight, rapidly expanding, and faintly compressed. The ephebic (adult) section is ovoid and sutures are straight and slightly oblique. Has an exterior with transverse bands and finer longitudinal markings. Shows no hyponomic sinus. The siphuncle is small and ventral.

Ecology: Active swimmers and posthumous floaters.


http://www.mcz.harvard.edu/Departments/ ... yrocerassp

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[Editted by aardvark on 14-12-2007 at 03:09 GMT +1]

[Editted by aardvark on 14-12-2007 at 03:11 GMT +1]