mature, 4.5 mm
Costasiella kuroshimae Ichikawa, 1993
|Maximum size: 4.5 mm.
species has a translucent cream body decorated with white and a
mahogany patch on the head behind the eyes. Black pigment on the
head is variably developed and the rhinophores are tipped with black.
Branches of the digestive gland in the cerata shift from
olive green basally to mahogany sub-apically. Some white patches and
flecks may appear
iridescent-blue depending on lighting.
is a rare species known from only three animals, two found at 1-2 m (3-6 ft)
on an exposed to
moderately exposed accretion platform on Oahu.
Oahu: widely distributed in the Indo-Pacific.
It was first recorded in Hawaii from Diamond Head State Park, Oahu by CP on
Oct. 3, 1999. Costasiella kuroshimae is generally considered to
be a variable species. So, we're giving precedence to the shared
characteristics and lumping the 1999 and 2014 animals. However, they
also differ on some points leaving a possibility that they could
ultimately turn out to be separate species. If they are split, the 2014 animal
is likely to remain under the name since it appears to be a closer match
for the Japanese material.
mm: Diamond Head State Park, Oahu; Oct. 3, 1999.
Observations and comments:
1: ( )