This pretty little species of the family Gastropteridae is known in the Marshalls from five specimens, although an animal that looks pretty much the same has also been recorded from Okinawa as Sagaminopteron sp. 1. The first Marshall Islands specimen was found on 25 May 2008 at a depth of 9m on Halimeda algae on the lagoon slope of the east reef of Kwajalein Atoll. It measured 12mm when crawling.
The second specimen, shown below, was found on 29 June 2008 on a Dysidea sponge in a Halimeda patch on a Kwajalein Atoll lagoon reef at a depth of about 9m. This one was a bit smaller than the first, measuring 7mm. Two more specimens were found in similar Halimeda patches in August of 2008.
A fourth specimen, found in the same general area on 25 August 2008, measured 13mm in length and is shown below.
Created 23 June 2008
Updated 6 April 2011