Proctocaecum blairi sp. nov. [Digenea, Cryptogonimidae] from the freshwater crocodile, Crocodylus johnstoni, in Northern Territory, Australia

• Autorzy: Tkach V V , Snyder S.D.
• Języki publikacji: EN

Abstrakty

EN

Proctocaecum blairi sp. nov. is described from specimens found in the intestine of an Australian freshwater crocodile, Crocodylus johnstoni, from Northern Territory, Australia. The most important diagnostic features of the new species are the body proportions and size, the position of the pharynx (relative length of the prepharynx and oesophagus), the relative length and position of the vitelline fields, and the number, shape and size of the circumoral spines. The new species is morphologically most similar to Proctocaecum atae, P. elongatum, P. crocodili, P. gairhei and Acanthostomum slusarskii. It differs from all of these species in having a much longer prepharynx, and differs from both P. atae and P. crocodili in having a much longer body and posteriorly situated vitelline fields. Proctocaecum blairi sp. nov. differs from P. elongatum in having a shorter body, a greater forebody to hindbody ratio, a much smaller ventral sucker, and a higher number of circumoral spines (23 vs 21 in P. elongatum). The new species differs from P. gairhei in possessing a much larger body length:width ratio and an ovary separated from the anterior testis by a seminal receptacle. Acanthostomum slusarskii lacks a gonotyl and has fewer circumoral spines than the new species. Proctocaecum blairi sp. nov. is the third species of Proctocaecum and the fourth cryptogonimid species known from crocodiles in Australia.

Słowa kluczowe

EN

Proctocaecum blairi; Digenea; Cryptogonimidae; freshwater crocodile; Crocodylus johnstoni; body proportion; size; new species; Proctocaecum atae; Proctocaecum elongatum; Proctocaecum crocodili; Proctocaecum gairhei; Acanthostomum slusarskii; Platyhelminthes; Australia

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 2010
• Tom: 55
• Numer: 3
• Opis fizyczny: p.240-244,fig.,ref.

Twórcy

autor

Tkach V V

• University of North Dakota, Grand Forks, North Dakota 58202, USA

autor

Snyder S.D.

Bibliografia

• Blair D., Brooks D.R., Purdie J., Melville L. 1988. Timoniella absita n. sp. (Digenea: Cryptogonimidae) from the saltwater crocodile (Crocodylus porosus Schneider) from Australia. Canadian Journal of Zoology, 66, 1763–1766. DOI: 10.1139/z88-254.
• Brooks D.R. 1980. Revision of the Acanthostominae Poche, 1926 (Digenea: Cryptogonimidae). Zoological Journal of the Linnean Society, 70, 313–382. DOI: 10.1645/0022-3395(2003) 089[0159:AMNSDC]2.0.CO;2.
• Brooks D., Blair D. 1978. Description of Acanthostomum quaesitum (Nicoll, 1918) Hughes, Higginbotham, and Clary, 1942 (Digenea: Cryptogonimidae) in Crocodylus johnsoni Krefft from Australia. Proceedings of the Helminthological Society of Washington, 45, 53–56. DOI: 10.1111/j.1096-3642.1980.tb00855.x.
• Junker K., Brooks D.R., Boomker J. 2008. Proctocaecum gairhei sp. nov. (Digenea: Cryptogonimidae: Acanthostominae) from Gavialis gangeticus (Gmelin) in Nepal and a revised cladogram of Proctocaecum Baugh, 1957. Systematic Parasitology, 71, 229–236. DOI: 10.1007/s11230-008-9151-9.
• Kalyankar S.D. 1977. Acanthostomum slusarskii sp. n. (Trematoda, Acanthostomidae) from Crocodilus palustris Less in India. Acta Parasitologica Polonica, 24, 227–230.
• Miller T.L., Cribb T.H. 2008. Family Cryptogonimidae Ward, 1917. In: (Eds. R.A. Bray, D.I. Gibson and A. Jones) Keys to the Trematoda. Vol. 3. CABI Publishing and the Natural History Museum, Wallingford, UK, 51–112.
• Nicoll M.A. 1918. The trematode parasites of North Queensland. IV. Parasites of reptiles and frogs. Parasitology, 10, 368–374. DOI: 10.1017/S0031182000003930.
• Tubangui M.A., Masiluñgan V.A. 1936. Trematode parasites of Philippine vertebrates, VIII. Flukes from a cobra and a crocodile. Philippines Journal of Science, 60, 255–266.
• Yamaguti S. 1954. Parasitic worms mainly from Celebes. Part 4. Trematodes of reptiles and birds. Acta Medica Okayama, 8, 329–340.