Publication! Opalescent nudibranchs marching northwards.

Congrats particularly to Kathryn Milligan, Nola Sheets and Emily Merlo, who started this off as course project at Bamfield Marine Sciences Centre in the 2016 Marine Ecology class taught by Dr. Chris Neufeld and Tao Eastham.  We were able to show that there were two species of Hermissenda present in Barkley and Clayoquot Sounds on Vancouver Island.  One is supposed to be there,  while the other is supposed to be in southern California.  Telling them apart is fairly straight forward, when you know what to look for: northern Hermissenda crassicornis have white striped cerata (sticky up bits) while southern Hermissenda opalscens have white tips but no stripes on their cerata. With the help of Dr. Ángel Valdés and Ka’ala Estores-Pacheco as well as the Barcode of Life group, we confirmed the original  morphological data with genetic analyses.  The question now, of course is why?  Perhaps climate factors?  Other species were also found far further northwards than normal that year…

Check out the lay summary here, or the full publication here:
Merlo, E.M., Milligan, K.A., Sheets, N.B., Neufeld, C.J., Eastham, T.M., Estores-Pacheco, A.L.K., Steinke, D., Hebert, P.D.N., Valdés, Á., and Wyeth, R.C. 2018. Range extension for the region of sympatry between the nudibranchs Hermissenda opalescens and Hermissenda crassicornis in the northeastern Pacific. FACETS 3(1): 764–776. doi:10.1139/facets-2017-0060.

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