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Rockwood

Neoichnology pop quiz

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Rockwood

What life form caused the pattern of deformation seen in this gastropod. 

Five points each for Kingdom, Class, and Family.

hint: It was found on the shore of a lake in Maine.

IMG_4915.JPG

IMG_4916.JPG

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abyssunder

maybe freshwater sabellid polychaetes (Annelida: Sabellidae), like Caobangia billeti ?

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doushantuo

ichnotaxonomically speaking,that would be Oichnus.

But i realize that's NOT the question

 

edit: if Abyssunder is right(and i think he is),Polydorichnus would perhaps be the better designation

images from:McDiarmid et al:THE ECOLOGY OF POLYCHAETES THAT INFEST ABALONE SHELLS IN
VICTORIA, AUSTRALIA/Journ.Shellfish Res./2004/v.23-4)

polyichistleanthc.jpg

polyichistleanthc.jpg

 

LINK to

J. Paleont., 81(6), 2007, pp. 1466–1475
SPIONID BORE HOLE POLYDORICHNUS SUBAPICALIS NEW ICHNOGENUS
AND ICHNOSPECIES: A NEW BEHAVIORAL TRACE IN
GASTROPOD SHELLS
MAKIKO ISHIKAWA1 AND TOMOKI KASE2
1Department of Geology, National Science Museum, 3-23-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan, maki@kahaku.go.jp, and
2kase@kahaku.go.jp

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caldigger

What's the prize for getting it right?

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Rockwood
29 minutes ago, caldigger said:

What's the prize for getting it right?

15 points

The total now is 5. :) Edited

Another clue in the AM.

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Rockwood

Clue: I was able to determine the cause by it's involuntary association with an arthropod. 

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Rockwood

The class is Mamalia  Family, Mustelidae.

It's actually more coprolite related. It rolled out of river otter excrement when I prodded it. The stuff is quite distinctive because it is often nearly pure crayfish shell.

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Max-fossils

That's pretty cool! 

If you need an ID on the shell itself, it's not a marine gastropod, but looks more like something along the lines of Planorbis or so. That's about all I can add to the topic :P 

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Coco

I am OK with Planorbis or of its family.

 

Coco

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daves64
20 hours ago, Rockwood said:

The class is Mamalia  Family, Mustelidae.

It's actually more coprolite related. It rolled out of river otter excrement when I prodded it. The stuff is quite distinctive because it is often nearly pure crayfish shell.

So you're saying it's a crappy shell.. :blink:

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Rockwood
1 hour ago, Coco said:

I am OK with Planorbis or of its family.

 

Coco

Apparently this one is known to otters as the pill snail. :) 

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