Diplasiocotyle

Diplasiocotyle
Scientific classification
Kingdom:
Animalia
Phylum:
Platyhelminthes
Class:
Monogenea
Subclass:
Polyopisthocotylea
Family:
Microcotylidae
Subfamily:
Microcotylinae
Genus:
Diplasiocotyle

Sandars, 1944

Systematics and morphology

Diplasiocotyle is a genus which belongs to the family Microcotylidae and class Monogenea. As all Monogenea, species of Microcotylidae are ectoparasites that affect their host by attaching themselves as larvae on the gills of the fish and grow into adult stage. This larval stage is called oncomiracidium, and is characterized as free swimming and ciliated.[1]

Members of the genus Diplasiocotyle are characterised by a conspicuous haptor, a midventral genital atrium armed with small hooks. This genus differs from Microcotyle by having clamps of two widely different sizes (the majority are extremely large) and by the structure of clamps.[1]

Species

According to the World Register of Marine Species,[2] 4 species have been attached to this genus:

  • Diplasiocotyle agonostomi (Sandars, 1945) Mamaev, 1968 [1][3]
  • Diplasiocotyle johnstoni Sandars, 1944 [1]
  • Diplasiocotyle cantheri (Van Beneden & Hesse, 1863) Yamaguti, 1963 [4][5] included in Diplostamenides as Diplostamenides canthari (Van Beneden & Hesse, 1863) Unnithan, 1971 [6] then in Neobivagina as Neobivagina canthari (Van Beneden & Hesse, 1863) Dillon & Hargls, 1965 [7]
  • Diplasiocotyle chorinemi Tripathi, 1956 included in Heterapta as Heterapta chorinemi (Tripathi, 1956) Unnithan, 1961 [8]

References
  1. Sandars, D. F. (1944). A contribution to the knowledge of the Microcotylidae of Western Australia. Transactions of the Royal Society of South Australia, 68(1), 67-81. PDF in BHL open access
  2. WoRMS (2019). Diplasiocotyle Sandars, 1944. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=411525 on 2019-11-27
  3. Mamaev, Y. L. (1986). The taxonomical composition of the family Microcotylidae Taschenberg, 1879 (Monogenea). Folia Parasitologica, 33, 199–206. open access
  4. Van Beneden, P. J., & Hesse, C. E. (1863). Recherches sur les Bdellodes (Hirudinées) et les trématodes marins: Mémoire présenté à l'Académie Royale de Belgique. Mémoires de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique, 34, 1-150 + Plates.
  5. Yamaguti S. 1963. Systema Helminthum Volume IV Monogenea and Aspidocotylea. Interscience, a division of John Wiley & Sons, New York & London, 699 pp.>
  6. 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.
  7. Dillon, W. A., & Hargis, W. J. (1965). Monogenetic trematodes from the southern Pacific Ocean. 2. Polyopisthocotyleids from New Zealand fishes: the families Discocotylidae, Microcotylidae, Axinidae and Gastrocotylidae. Antarctic Research Series, 5, 251-280.
  8. Tripathi, Y. R. (1956). Studies on the parasites of Indian fishes. IV. Trematoda: Monogenea, Mictoeotylidae. Records of the Indian Museum, 52(2/4), 231-247. open access
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