I don't know about a mutual benefit. I don't think that too many infaunal or epifaunal molluscs would do all that well riding shotgun on top of an echinoid.
Chad
---- Original message ----
>Date: Thu, 1 Jun 2006 07:08:59 +0200
>From: "M. J. Faber" <[log in to unmask]>
>Subject: Re: Tricolia affinis (Eulithdium affine) and Cerithium litteratum
>To: [log in to unmask]
>
>So there seems to be a mutual benefit here
>
>Marien
>
>----- Original Message -----
>From: "Mike Metz" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Thursday, June 01, 2006 1:44 AM
>Subject: Re: Tricolia affinis (Eulithdium affine) and Cerithium litteratum
>
>
>> Sea urchins just flip any shell they find along their path on top of them
>> as
>> camouflage. I have seen urchins with numerous bivalve halves and other
>> hard
>> substances, living and dead, adorning them.
>>
>> From sunny Pass-a-Grille
>>
>> Mike
>>
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Chad Ferguson
500 Geology/Physics
University of Cincinnati
Cincinnati, OH 45221-0013
(513) 556-3732
(513) 265-6197-cell
(513) 556-6931-fax
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