Where are the sensory organs of Nybelinia surmenicola (Trypanorhyncha)? A comparative analysis with Parachristianella sp. and other trypanorhynchean cestodes

Biserova, N.M.; Gordeev, I.I.; Korneva, J.V.

Авторы: Biserova Natalia M., Gordeev Ilya I., Korneva Janetta V.
Журнал: Parasitology Research
Том: 115
Номер: 1
Год издания: 2016
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 131
Последняя страница: 141
DOI: 10.1007/s00436-015-4728-0.
Аннотация: Summary The sensory organs in tegument of two trypanorhychean species – Nybelinia surmenicola (plerocercoid) and adult Parachrisianella sp. (Cestoda, Trypanorhyncha) were studied with the aim of ultrastructural description and a comparative analysis. In Nybelinia surmenicola we found single receptor (unciliated) within the median bothria fold. Unciliated receptor contains the central electron-dense disc, three dense supporting rings, and broad root and locates in the basal matrix under the tegument. The Nybelinia surmenicola plerocercoid lacks papillae with sensory cilia on the bothria adhesive surface. In contrast, numerous ciliated and unciliated receptors were found in Parachristianella sp.: six types on the bothria and one type in the strobila’ tegument. Ultrastructural constitution of sensory organs in form of ciliated free nerve endings as well as unciliated basal nerve endings of Parachristianella sp. has many common features inside Eucestoda. The tegument of N. surmenicola has a number of ultrastructural features which makes it significantly different from other Trypanorhyncha: squamiform and bristle-like microtriches Nybelinia surmenicola lack the base and the basal plate; the tegumental cytoplasm has a plicated constitution in a form of high comblike apical and deep basal folds; and numerous layers of basal matrix are present in subtegument. In comparison with other Trypanorhyncha, all Nybellinia species studied have less quantity of the bothrial sensory organs. This fact may reflect behavioral patterns of Nybellinia as well as phylogenetic position into Trypanorhyncha.
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Where are the sensory organs of Nybelinia surmenicola (Trypanorhyncha)? A comparative analysis with Parachristianella sp. and other trypanorhynchean cestodesстатья

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