300
MARINE MOLLUSCS AS HOSTS FOR SYMBIOSES
0.25 mm, with parallel sides; caudal rami cigar-shaped, 0.45 mm x
0.12-0.13 mm, armed as in female; maxilliped of four segments,
terminal claw 0.12-0.138 mm long, with slender basal spine measuring
0.010 mm long ; legs armed with spines and setae except endopodite of
fourth leg which may sometimes possess a rudimentary seta on its
basal podomere.
6 . Myocheres major Williams, 1907. (Fig. 198)
(Order Cyclopoida ; family Clausidiidae)
This copepod was originally described by Williams (1907) as
Lichomolgus major based on male and female adults collected from the
FIG. 198. Adult female Myocheies major, dorsal view. (Redrawn after Williams, 1907.)
mantle cavity of Mya arenaria, Mercenaria mercenaria and Mactra
solidissima at Wickford and Matunuck on Narragansett Bay, Rhode
Island. It was transferred to the genus Myicola by C. B. Wilson (1932)
who also gave a short redescription. Later, M. S. Wilson (1950)
erected Myocheres with this species as the genotype. Although Wilson
placed it in the family Lichomolgidae and Pearse (1947) placed it in
the family Myicolidae, in following Humes and Cressey (1958) I am
assigning i t to the family Clausidiidae.
MARINE MOLLUSCS AS HOSTS FOR SYMBIOSES
0.25 mm, with parallel sides; caudal rami cigar-shaped, 0.45 mm x
0.12-0.13 mm, armed as in female; maxilliped of four segments,
terminal claw 0.12-0.138 mm long, with slender basal spine measuring
0.010 mm long ; legs armed with spines and setae except endopodite of
fourth leg which may sometimes possess a rudimentary seta on its
basal podomere.
6 . Myocheres major Williams, 1907. (Fig. 198)
(Order Cyclopoida ; family Clausidiidae)
This copepod was originally described by Williams (1907) as
Lichomolgus major based on male and female adults collected from the
FIG. 198. Adult female Myocheies major, dorsal view. (Redrawn after Williams, 1907.)
mantle cavity of Mya arenaria, Mercenaria mercenaria and Mactra
solidissima at Wickford and Matunuck on Narragansett Bay, Rhode
Island. It was transferred to the genus Myicola by C. B. Wilson (1932)
who also gave a short redescription. Later, M. S. Wilson (1950)
erected Myocheres with this species as the genotype. Although Wilson
placed it in the family Lichomolgidae and Pearse (1947) placed it in
the family Myicolidae, in following Humes and Cressey (1958) I am
assigning i t to the family Clausidiidae.