Microcotyle constricta facts for kids

Microcotyle constricta is a species of monogenean, parasitic on the gills of a marine fish. It belongs to the family Microcotylidae.

Taxonomy

Microcotyle constricta was first described by Robinson in 1961 from the gills of the New Zealand blue cod Parapercis colias (Pinguipedidae) based on one specimens (one sectioned). In 1965, Dillon & Hargis redescribed this species based on 20 specimens and gave additional information regarding buccal organs, seminal receptacle position and egg.

Morphology

The New Zealand blue cod Parapercis colias is the type host of Microcotyle constricta

Microcotyle constricta has the general morphology of all species of Microcotyle, with a symmetrical elongate body, rounded anteriorly and comprising an anterior part which contains most organs and a posterior part called the haptor. The haptor is symmetrical, and bears 74-82 rectangular clamps, arranged as two rows, one on each side. The clamps of the haptor attach the animal to the gill of the fish. There are also two oval septate buccal suckers at the anterior extremity. The digestive organs include an anterior, terminal mouth, a rounded pharynx, an enlarged oesophagus immediately posterior to the pharynx and, which extends to the level of the posterior margin of the genital atrium, and a posterior intestine with two lateral branches provided with numerous secondary branches. The left branch extends into the haptor. Each adult contains male and female reproductive organs.

Hosts and localities

The type-host of Microcotyle constricta is the New Zealand blue cod Parapercis colias (Pinguipedidae). The type-locality is off New Zealand. Dillon & Hargis reported this species from the type-host and locality.