I'm having trouble identifying some eucopia. Namely E. grimaldii and E.
unguiculata. I have a copy of "Identification Manual to the Mysidacea and
Euphausiacea of the Northeast Pacific" by Kathman, Austin, Saltman and
Fulton but the description of spines on the telson and the eyestalk
description (among other things) don't match up.
It even states "Eyes. Proximal margin of cornea approximately bisects a
right angle to the long axis of the stalk" for Eucopia grimaldii and then
goes on under the E. unguiculata description to say "Eyes. Cornea at 45
degree angle to stalk (also in E. grimaldii)".
If I believe the telson spines it's E. grimaldii but it also has a soft
little spine/protuberance on the eyestalk which is only illustrated for
E. unguiculata. BTW E. australis doesn't have this same spine in the
close-up eyestalk diagram but does in the diagram of the whole head.
I'm lost. Does anyone know what the most up-to-date information is on
this group. I get the feeling that taxonomically it must be in an awful
Thanks in anticipation,
Planktology Division. Ocean Research Institute. University of Tokyo.
Dhugal J. Lindsay
University of Tokyo.
wild boars appear i've heard
but still, This is the road
that I shall take -Dhugal