Lophophore innervation in Flustrellidra hispida (Bryozoa)

Исаева, М.А.; Косевич, И.А.; Темерева, Е.Н.

Авторы: Исаева М.А., Косевич И.А., Темерева Е.Н.
Сборник: 2nd Young Researcher Meeting Morphology
Тезисы
Год издания: 2021
Место издания: Deutschen Zoologischen Gesellschaft
Аннотация: Ctenostomе bryozoans are unusual gymnolaemates and their anatomy probably reflects ancestralstate of bryozoans in general. Our research is focused on the peculiarity of the lophophoreinnervation in Flustrellidra hispida. Immunocytochemistry and confocal laser scanningmicroscopy revealed the presence of outer nerve ring, which gives rise to the tentacle nerves thatare associated with the groups of outer perikarya. The outer nerve ring has been formerlydescribed in some ctenostomates and cyclostomates, but is not connected with tentacle nerves.Formerly, the outer nerve ring was described in some ctenostomates and cyclostomates, but ithas no connection to any nerves. The discovered feature of lophophore innervation of F. hispidaallows to suggest the evolutionary transformation from a phoronida-like ancestor lophophore,bearing prominent outer nerve ring with numerous tentacle nerves emanating from it, to thecomplicated bell-shaped lophophore of F. hispida with well pronounced outer nervous ringbearing a few tentacle nerves. Next one in this hypothetical row will be the lophophore of theother ctenostomates and some cyclostomates with an outer nerve ring having no connection toany nerves, and cheilostomates lophophore, lacking an outer nerve ring at all. The study issupported by Russian Science Foundation (#18-14-00082).
Добавил в систему: Исаева Мария Алексеевна

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