Is this Bimaculoides or Bimaculatus?

Discussion in 'ID Requests' started by Joe-Ceph, May 13, 2008.

  1. Joe-Ceph

    Joe-Ceph Haliphron Atlanticus Supporter

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    I’m reading contradictory information about how to use the eyespots to distinguish between O. Bimaculoides and O. Bimaculatus. Which one has a a solid ("sunburst-like”) blue ring, and which has a broken (“chain link”) eye spot?

    Here’s a picture of the ring on a little Bimac I caught in a tidepool recently. I would call this ring solid, unbroken, and “sunburst-like”, as opposed to “chain link”. So is it a Bimaculatus or a Bimaculoides (or is the blue ring on the eyespot inconclusive)?
     

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  2. Nancy

    Nancy Titanites Staff Member Moderator

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    This photo is not too clear. Look at the photo in the bimac care sheet - you can see the unbroken "chain links". That's what an O. bimaculoides's ocellus looks like. Most likely the eye spot you photographed looks like this.

    Nancy
     
  3. Joe-Ceph

    Joe-Ceph Haliphron Atlanticus Supporter

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    Ok, so Bimaculoides will have an unbroken chain link.
    What will Bimaculatus have? A broken circle? A smooth unbroken circle (no chain links)? How are the rings on the two different?
     
  4. daddysquoc

    daddysquoc Wonderpus Registered

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    thats a bimaculatus. the circle is solid.
     

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