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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]

Harpacticoid copepod

Harpacticoid copepod

 

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, claw­-shaped, 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)