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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 92, No. 3, 1997, pp. 359-364
Bioline Code: oc97067
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 92, No. 3, 1997, pp. 359-364

 en Paraorientatractis semiannulata n. g., n. sp. (Cosmocercoidea: Atractidae) from the large intestine of the side necked turtle, Podocnemis unifilis Troschel, 1848 (Testudines: Pelomedusidae) in Brazil
Lynda M Gibbons; LF Khalil & CJ Marinkelle

Abstract

Specimens collected from the large intestine of the sidenecked turtle
Podocnemis unifilis Troschel, 1848 in the region of Cumina and Trombetas
rivers near Para, Brazil are assigned to a new genus and new species of the
nematode superfamily Cosmocercoidea and family Atractidae and named
Paraorientatractis semiannulata. The new genus is separated from the
nearest genus Orientatractis by the funnelshaped mouth opening, the
presence of 4 distinct lips, 4 papillae in the internal cycle, one on each
lip margin, 2 lateral amphids with large amphidial pores and absence of
submedian papillae. It is also separated from Orientatractis and
Proatractis by the presence of striated lateral alae which curve dorsally
extending from mid oesophagus to mid tail, the difference in size of the
vulvar opening and the presence of large transverse ridges or semiannules
on the dorsal surface. The new species can be separated from the species of
the genera Orientatractis and Proatractis by the characters that
distinguish the genera and the arrangement of the caudal papillae on the
male. A host/parasite list for Podocnemis spp. is included.

Keywords
Nematoda Atractidae Paraorientatractis n. g. Paraorientatractis semiannulata n. sp. Podocnemis Brazil

 
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