TABLE XVI. A COMPARISON OF THE DIAGNOSTIC CHARACTERISTICS OF Mytilicola spp.
After Humes, 1954b.
M . orientalis Mori
( = M . ostreae Wilson)
M . intestinalis Steuer
~~
~
M . porrectu Humes
Female
Caudal ramus :
Posterior corners of head :
Dorsolateral thoracic projections :
Ratio of length of head to width :
Egg sac :
Elongated (237p) and
Elongated (233p) but not
Smoothly rounded
With a pair of slender
Short and rather stout
0.647
0.782
Long, reaching far beyond Long, 2.74 mm, reaching
widely divergent
widely divergent
processes
Long and tapering
caudal rami
far beyond caudal rami
Male
Dorsolateral thoracic projections :
Claw of maxilliped :
Well formed
Well formed but absent on
1st leg-bearing somite
according to Mori (1935)
Elongated, not strongly
Elongated, not strongly
hooked
bent
?
c3
i
Smoothly rounded
F
k
8
only short distance
k
Short ( 9 6 p ) and not divergent
Q
iR
Short and rather stout
0.924
Short, 1.28 mm, reaching
M
+Reduced to almost undiscernible humps
Short,
stout,
strongly
hooked