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Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 6 декабря 2018 г.
Аннотация:Reconstruction of the cerebral ganglion fine structure in Parachristianella sp (Cestoda, Trypanorhyncha)
N.M. Biserova1, J.V. Korneva2
1Department of Invertebrate Zoology,
Faculty of Biology, Moscow State University, 119991, Moscow, Russia.
e-mail: nbiserova@yandex.ru
2Institute for Biology of Inland Waters, Russian Academy of Science,
152742, Borok, Yaroslavl, Russia; e-mail: janetta@ibiw.yaroslavl.ru
Aim of this work is the reconstruction of the cerebral ganglion of Parachristianella sp.from (Cestoda, Trypanorhyncha) for comparative analysis within the order and within a class. Based on serial semithin and ultrathin transverse sections of scolex made a reconstruction of the general structure and studied the fine details of the cerebral ganglion Parachristianella sp. Ganglion consists of two pairs of frontal and lateral lobes and an unpaired central (= median) lobe. Frontal lobes combined semiring commissura in the dorsal and ventral pairs. Double lateral lobes connected by a median (= central) and crisscross commissura. Dorsal and ventral nerve rootlets origin from the lateral lobes and innervate the musculature of bothria. Dorsal and ventral rootlets forming the back of the scolex sublateral nerves running parallel to the main nerve cord.
In addition, as part of the ganglion revealed 4 pairs of nerves (tentacles and bulbar), consisting of myelinated giant axons. Giant axons somata lie in crisscross commissure, as well as in the upper and down parts of these nerves. Specific ultrastructural features of the ganglion are: 1) compact neuropils possessing in all lobes: five neuropils in the center of the ganglion and four neuropils in frontal lobes; 2) and also the crisscross commissure, which firstly described in the nervous system of cestodes. The cerebral ganglion of Parachristianella sp contains more than 200 neurons, among which includes 5 ultrastructural types, as well as glial cells.
Comparative analysis showed a high degree of morphological similarity in the structure of the cerebral ganglion studied species within the order Trypanorhyncha and significant differences from other groups.
Key words: nervous system, cerebral ganglion, neuropile, giant axon, Cestoda, Trypanorhyncha, ultrastructure.