Microcotyle centrodonti

Microcotyle centrodonti
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Monogenea
Order:	Mazocraeidea
Family:	Microcotylidae
Genus:	Bivagina
Species:	B. centrodonti
Binomial name
	Bivagina centrodonti; Brown, 1929
Synonyms
	Dinotaster centrodonti (Brown, 1929) Unnithan1971[1];

Bivagina centrodonti is a species of monogenean, parasitic on the gills of a marine fish. It belongs to the family Microcotylidae. [2]

Taxonomy

Bivagina centrodonti was first described by Brown in 1929 from the gills of dead fishes of the species Pagellus centrodontus (currently Pagellus bogaraveo found in an Aquarium of the English Channel. [2] Unnithan (1971) placed this species in his new monotypic genus Dinotaster Unnithan, 1971.[1] However, Bivagina centrodonti was returned to the genus Bivagina by Mamaev & Parukhin in 1975. <ref name="Mamaev&Parukhin1975">Mamaev, Yu. L. & Parukhin, A.M. (1975) Description of a new species Bivagina heterospina sp. nov. and remarks on the composition of the genus Bivagina Yamaguti, 1963. Hydrobiological Journal, 2, 88–93>

Morphology

Bivagina centrodonti has the general morphology of all species of Bivagina, with a symmetrical small thread-like body, elongated and tapering at both ends. The body comprises an anterior part which contains most organs and a posterior part called the haptor. The haptor is symmetrical, delimited from the body by a constriction, and bears 120-160 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 buccal suckers, elliptical and septate, located at the anterior extremity. The digestive organs include an anterior, terminal mouth, a spherical muscular pharynx, an oesophagus immediately anterior to the genital atrium and a posterior intestine with two lateral branches provided with numerous secondary branches, which enter the haptor. Each adult contains male and female reproductive organs. The reproductive organs include an anterior genital atrium situated immediately posterior to the intestinal bifurcation, armed with numerous very spines, a medio-dorsal bifurcated vagina situated posterior to the buccal suckers, a single much-coiled ovary consisting of a convoluted tube, and 14-23 testes which are posterior to the ovary and occupy the center of the posterior portion of the body. The eggs have long, fine, very coiled filament, and are elongated and pointed at both ends. The posterior filament is much shorter. [2]

Hosts and localities

Pagellus bogaraveo is the type host of Bivagina centrodonti

The host-type is Pagellus bogaraveo (Sparidae). The type-locality is the English Channel. [2]

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References

Unnithan, R. V. (1971). On the functional morphology of a new fauna of Monogenoidea on fishes from Trivandrum and environs. Part IV. Microcotylidae sensu stricto and its repartition into subsidiary taxa. American Midland Naturalist, 366-398.
Brown, Eleanor M. (1929). "On a new species of Monogenetic Trematode from the gills of Pagellus centrodontus". Proceedings of the Zoological Society of London. 99 (1): 67–83. doi:10.1111/j.1469-7998.1929.tb07687.x. ISSN 0370-2774.

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[Unnithan1971-1] Unnithan, R. V. (1971). On the functional morphology of a new fauna of Monogenoidea on fishes from Trivandrum and environs. Part IV. Microcotylidae sensu stricto and its repartition into subsidiary taxa. American Midland Naturalist, 366-398.

[Brown1929-2] Brown, Eleanor M. (1929). "On a new species of Monogenetic Trematode from the gills of Pagellus centrodontus". Proceedings of the Zoological Society of London. 99 (1): 67–83. doi:10.1111/j.1469-7998.1929.tb07687.x. ISSN 0370-2774.