TY - JOUR

T1 - Сравнительная нейроморфология лофофора и стенки тела трех видов пресноводных мшанок (Bryozoa, Phylactolaemata)

AU - Shunkina, K. V.

AU - Starunov, V. V.

AU - Zaitseva, O. V.

AU - Ostrovsky, A. N.

PY - 2014

Y1 - 2014

N2 - The nervous system of the lophophore and the body wall of the common European freshwater bryozoans, Cristatella mucedo, Plumatella repens, and Fredericella sultana (Phylactolaemata), was studied using antibodies to acetylated α-tubulin and confocal laser microscopy methods. Despite the differences in the lophophore shape, its innervation appeared to be very similar in all the species investigated. The cerebral ganglion is situated on the dorsal wall of the pharynx giving the nerve tracts (horns) of the lophophore dorsally and peripharyngeal nerve ring ventrally. Both lophophore tracts and peripharyngeal ring give numerous main radial nerves that form the lateral nerves of the tentacles. Some differences between the three species were found in the innervation of the cystid wall and of the base of the lophophore. The bell-shaped lophophore in F. sultana, atypical for freshwater bryozoans, has a different way of the innervation as compared to that in similarly shaped lophophores of marine bryozoans. Its structure evidences that it evolved from the horse-shoe lophophore (typical for phylactolaemates) by the reduction of the arms and tentacles on its anal side. Sole innervation was studied in the mobile colonies of C. mucedo for the first time. The nervous plexus of the sole is situated between the mutually perpendicular muscle layers. The plexus consists of main nerve fibers, going parallel to transverse muscular layer. Bipolar and multipolar neurons, which could be found in that plexus, give off some ramifications. These ramifications are usually directed along the longitudinal muscular layer.

AB - The nervous system of the lophophore and the body wall of the common European freshwater bryozoans, Cristatella mucedo, Plumatella repens, and Fredericella sultana (Phylactolaemata), was studied using antibodies to acetylated α-tubulin and confocal laser microscopy methods. Despite the differences in the lophophore shape, its innervation appeared to be very similar in all the species investigated. The cerebral ganglion is situated on the dorsal wall of the pharynx giving the nerve tracts (horns) of the lophophore dorsally and peripharyngeal nerve ring ventrally. Both lophophore tracts and peripharyngeal ring give numerous main radial nerves that form the lateral nerves of the tentacles. Some differences between the three species were found in the innervation of the cystid wall and of the base of the lophophore. The bell-shaped lophophore in F. sultana, atypical for freshwater bryozoans, has a different way of the innervation as compared to that in similarly shaped lophophores of marine bryozoans. Its structure evidences that it evolved from the horse-shoe lophophore (typical for phylactolaemates) by the reduction of the arms and tentacles on its anal side. Sole innervation was studied in the mobile colonies of C. mucedo for the first time. The nervous plexus of the sole is situated between the mutually perpendicular muscle layers. The plexus consists of main nerve fibers, going parallel to transverse muscular layer. Bipolar and multipolar neurons, which could be found in that plexus, give off some ramifications. These ramifications are usually directed along the longitudinal muscular layer.

KW - Cristatella mucedo

KW - Fredericella sultana

KW - Plumatella repens

UR - http://www.scopus.com/inward/record.url?scp=84900869708&partnerID=8YFLogxK

U2 - 10.7868/S0044513414030118

DO - 10.7868/S0044513414030118

M3 - статья

VL - 93

SP - 497

EP - 507

JO - ЗООЛОГИЧЕСКИЙ ЖУРНАЛ

JF - ЗООЛОГИЧЕСКИЙ ЖУРНАЛ

SN - 0044-5134

IS - 3

ER -