Arredondo Nathalia J, de Pertierra Alicia A Gil
Laboratorio de Helmintología, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Int. Güiraldes 2160, Pabellón II, 4 masculine Piso, Universidad de Buenos Aires, C1428EGA, Buenos Aires, Argentina.
Syst Parasitol. 2010 Jun;76(2):103-10. doi: 10.1007/s11230-010-9238-y. Epub 2010 May 1.
The proteocephalidean tapeworm Monticellia santafesina n. sp. is described from the siluriform catfish Megalonema platanum (Günther) (Siluriformes: Pimelodidae) in the Paraná River basin, Argentina. The new species is allocated to Monticellia La Rue, 1911 (Proteocephalidae: Monticelliinae) because of the cortical position of the testes, ovary, vitelline follicles and uterus, a globular scolex without a metascolex and uniloculate suckers. The new species differs from all other species of Monticellia (except for M. lenha Woodland, 1933) in possessing a vaginal canal opening anterior or posterior to the cirrus-sac. M. santafesina can be distinguished from M. lenha by the following characteristics: a larger body size; a weakly developed internal longitudinal musculature arranged in 15-35 slim bundles of muscle fibres; vitelline follicles not interrupted at the level of the cirrus-sac and vaginal canal, and with a few paramuscular and/or medullary follicles; the absence of large spinitriches on the anterior margin of the suckers; and the utilisation of Megalonema platanum (in the Paraná River basin) as its host, rather than Sorubimichthys planiceps (Spix & Agassiz) (in the River Amazon). Monticellia santafesina exhibits low values of prevalence (9%) and intensity of infection (1). Megalonema platanum was parasitised by two proteocephalidean cestodes, Rudolphiella cf. lobosa (Riggenbach, 1895) and the new species described in this paper.
在阿根廷巴拉那河流域的无齿鲇（Megalonema platanum，冈瑟）（鲇形目：油鲇科）体内发现了一种新的原头科绦虫，命名为圣达菲蒙蒂绦虫（Monticellia santafesina n. sp.）。由于睾丸、卵巢、卵黄滤泡和子宫位于皮层，头节呈球形且无后体节，吸盘为单腔，因此该新物种被归入1911年的蒙蒂绦虫属（Monticellia La Rue）（原头科：蒙蒂绦虫亚科）。该新物种与蒙蒂绦虫属的所有其他物种（除1933年的林地蒙蒂绦虫（M. lenha Woodland）外）的区别在于其阴道管开口于阴茎囊之前或之后。圣达菲蒙蒂绦虫可通过以下特征与林地蒙蒂绦虫区分开来：体型较大；内部纵向肌肉组织发育较弱，由15 - 35束细长的肌纤维束组成；卵黄滤泡在阴茎囊和阴道管水平处不中断，且有一些肌旁和/或髓质滤泡；吸盘前缘无大型棘；其宿主为巴拉那河流域的无齿鲇，而非亚马逊河的平头油鲇（Sorubimichthys planiceps，斯皮克斯和阿加西）。圣达菲蒙蒂绦虫的感染率（9%）和感染强度（1）较低。无齿鲇被两种原头科绦虫寄生，一种为鲁氏Rudolphiella cf. lobosa（里根巴赫，1895年），另一种为本论文描述的新物种。
