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POECILOSTOMATOIDA (DOJIRI & CRESSEY, 1987) (order)
[POECILOSTOMATOIDA THORELL, 1859]
Eyes absent. Second antennae uniramous, exopodite
vestigial or absent. Carapace absent. Thorax and
abdomen differentiated, 4-6 pairs of legs. Larval
development metamorphic. Larvae are truly planktonic,
but are mostly found in inshore waters in larger lakes
(Fryer, 1978.) Harpacticoid copepods generally have an
exopodite on the antennae.
(Lowry, 1999) [1930b]
ERGASILIDAE, THORELL, 1859 (family)
Second antenna large, with a large claw for grasping.
First antenna short with 6 segments.
Parasitic, in sea- and freshwater.
ERGASILUS, NORDMANN, 1832
147 a. Body violin-shaped. Antennae 4-segmented, clawshaped,
as long as the body. Female with violet-blue streaks.
Only the adult female is parasitic, the immature females
and all stages of males being free living. Velasquez (1951)
reported the species to be parasitic on the gills of the
flathead goby Glossogobius giurus, BUCHANAN-HAMILTON,
locally known as biyang puti, from Laguna de Bay.
Average parasitic burden was found to be 15 parasites
per fish. Endemic.
- Laguna de Bay, La Mesa Dam
Ergasilus philippinensis VELASQUEZ, 1951
[1951, 1978a+b, 1986a, 1997]
Other species: Ergasilus coleus, CRESSEY & COLLETTE, 1970, from Strongylura
strongylara and S. urvillii. Found at Culion Island and Mindanao.
Seawater species: Ergasilus rotundicorpus JONES & HINE, 1983,
From Orange-spotted spinefoot Siganus guttatus (Bloch), Panay.
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(Photo: Flemming Petersen, 1980)