Stenoplax bahamensis

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Stenoplax bahamensis

reefnet
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reefnet
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Joined: January 13th, 2009, 3:24 am

December 30th, 2015, 7:36 pm #1

St. Vincent, 25 mm long. Are these Stenoplax bahamensis?

Les Wilk
ReefNet Inc.

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Susan J. Hewitt
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Susan J. Hewitt
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Joined: May 22nd, 2011, 8:18 pm

December 31st, 2015, 11:40 pm #2

Sure looks like a Stenoplax, but whether it is S. bahamensis I don't know. The Bahamas are supposed to be the center of the distribution for that species, so St. Vincent would be pretty far south.
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reefnet
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reefnet
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Joined: January 13th, 2009, 3:24 am

January 1st, 2016, 4:34 am #3

A few years ago notoplax had posted the following key:

1a Tail valve as long as wide, mucro postmedian. . . . . . . . . . . . . . . . 2
1b Tail valve wider than long, mucro central . . . . . . . . . . . . . . . . .. . 3
2a Concentrical riblets on end valves and lateral areas with the grooves between them smooth or nearly so . . S. floridana
2b Concentrical riblets with the grooves between them transversely latticed. . . . . . . . . . . . . . . . . . . . . . . . . . S. bahamensis
3 End valves with smooth, somewhat wavy concentric ridges; Atlantic species . . . . . . . . . . . . . . . . . . . . . . . . S. purpurascens

I used this key to arrive at S. bahamensis. Did I do it correctly?
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Susan J. Hewitt
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Susan J. Hewitt
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Joined: May 22nd, 2011, 8:18 pm

January 3rd, 2016, 8:56 pm #4

You probably did do it correctly. I retract what I said.
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notoplax
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Joined: May 13th, 2006, 7:30 am

January 4th, 2016, 8:40 am #5

As always difficult to be 100% sure solely with a picture but I think it is indeed Stenoplax bahamensis.
Glad that the key is proven to be useful :)
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reefnet
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reefnet
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Joined: January 13th, 2009, 3:24 am

January 4th, 2016, 2:52 pm #6

"Glad that the key is proven to be useful".

I filed the key away for a rainy day. I'm glad I did. THANKS.
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