Notomegarhynchus n. gen. (Eucestoda: Tetraphyllidea) is proposed to accommodate Notomegarhynchus navonae n. gen., n. sp. from Atlantoraja castelnaui in Mar del Plata, Argentina. Notomegarhynchus shetlandicum n. comb. from Bathyraja eatonii and B. maccaini in South Shetlands region, Antarctica, is a second species in the genus. Notomegarhynchus belongs to the Echeneibothriinae within the Phyllobothriidae. It can be distinguished from all other tetraphyllidean genera by the structure of the scolex in form of a massive myzorhynchus consisting of a proscolex and an apical organ, both of which are nonretractable and noninvaginable; in addition, there are 4 pedunculated and nonloculate acetabula. Notomegarhynchus shetlandicum is differentiated from N. navonae particularly in details of acetabular and myzorhynchus morphology, arrangement of testes, and shape of eggs. The inclusion of Notomegarhynchus in the Echeneibothriinae requires emendation of the diagnosis of the subfamily to include taxa possessing postvaginal testes. In addition, new terminology is proposed for distinct regions of the scolex.
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April 2002
Research Article|
April 01 2002
NOTOMEGARHYNCHUS NAVONAE N. GEN. AND N. SP. (EUCESTODA: TETRAPHYLLIDEA), FROM SKATES (RAJIDAE: ARHYNCHOBATINAE) IN THE SOUTHERN HEMISPHERE
Verónica A. Ivanov;
Verónica A. Ivanov
Laboratorio de Helmintología, Departamento de Cs. Biológicas, Facultad de Cs. Exactas y Naturales, Universidad de Buenos Aires. Ciudad Universitaria, Pabellón II, piso 4, C1428EHA Buenos Aires, Argentina. ivanov@bg.fcen.uba.ar
* Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
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Ronald A. Campbell
Ronald A. Campbell
Laboratorio de Helmintología, Departamento de Cs. Biológicas, Facultad de Cs. Exactas y Naturales, Universidad de Buenos Aires. Ciudad Universitaria, Pabellón II, piso 4, C1428EHA Buenos Aires, Argentina. ivanov@bg.fcen.uba.ar
† Department of Biology, University of Massachusetts Dartmouth, N. Dartmouth, Massachusetts 02747-2300
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J Parasitol (2002) 88 (2): 340–349.
Citation
Verónica A. Ivanov, Ronald A. Campbell; NOTOMEGARHYNCHUS NAVONAE N. GEN. AND N. SP. (EUCESTODA: TETRAPHYLLIDEA), FROM SKATES (RAJIDAE: ARHYNCHOBATINAE) IN THE SOUTHERN HEMISPHERE. J Parasitol 1 April 2002; 88 (2): 340–349. doi: https://doi.org/10.1645/0022-3395(2002)088[0340:NNNGAN]2.0.CO;2
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