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Old 10/11/2017, 08:34 AM   #1
iced98lx
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Clam ID Request

This was sold to me as a Derasa, which was one of the species that fit my tank positioning (high light, but a clam that was happy being on the sand bed with proper rock to adhere to).

After getting it home and reading more about Derasa clams it appears this may not be one, based on the ribbing on the shell. Your opinion on ID is welcome.

It is a rather dull brown/black/gold coloration on the mantle with 5 scallops. I can get top downs fully open if that would help.




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Old 10/11/2017, 09:00 AM   #2
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Here are a couple top downs just now:


Clam by Christopher Uthe, on Flickr


Clam by Christopher Uthe, on Flickr


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Old 10/11/2017, 09:10 AM   #3
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The numerous closely spaced scutes combined with the lack of incurrent siphon tentacles has me puzzled. The mantle is pushing me toward thinking I've accidentally bought a gigas but I am by no means a clam expert...


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Old 10/11/2017, 09:20 AM   #4
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Also, note that below the obvious scutes it is smooth the bottom 1/3 of the shell and appears to be fairly symmetrical.


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Old 10/13/2017, 05:30 AM   #5
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It looks like a maxima or crocea. I'm leaning towards maxima due to its mantle and acute on the side. I need to look into my books more to confirm though.

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Old 10/13/2017, 05:31 AM   #6
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*scutes not acute

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Old 10/13/2017, 01:24 PM   #7
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crocea


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Old 10/18/2017, 08:19 PM   #8
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Crocea or Maxea (crocea/maxima hybrid).


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