title: Musculature and innervation of the pygidium in Eunicida (Annelida: Errantia)
metadata.name: dc.contributor.author
metadata.value: Starunov, Viktor
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2019-06-26T20:19:28Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2019-06-26T20:19:28Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2019-03
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Starunov, V. 2019. Musculature and innervation of the pygidium in Eunicida (Annelida: Errantia). Bio. Comm. 64(1): 31–40.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/ spbu03.2019.104
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/15791
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The pygidium is a terminal part of the annelid body that is considered non-homologous to body segments. Despite the high level of morphological diversity, the internal morphology of the pygidial region is very poorly studied. Recent research revealed that in some errant annelids the pygidium possesses complex musculature and innervation. To provide new data for the comparative analysis of pygidial organization, the musculature and innervation in the pygidial region in five annelid species belonging to the order Eunicida were studied using phalloidin labeling, immunohistochemistry and confocal scanning microscopy. In all studied species the pygidial musculature consists of a circular or horseshoe-shaped muscle. The pygidial innervation comprises two pairs of main longitudinal nerves and paired circumpigidial nerves. The single pair of longitudinal nerves in Ophryotrocha irinae may be regarded as a secondary loss. In Schistomeringos japonica a small terminal commissure between longitudinal nerves was found. The finding of numerous receptor cell endings in the surface of the pygidium suggests its important sensory function. Comparison with Phyllodocida demonstrates the high level of similarities in the pygidial organization and the loss of the terminal commissure in Eunicida.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: This work was supported by the research grant RFBR 16-34-60134 mol_a_dk and by Zoological Institute project АААА-А19-119020690076-7.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Biological Communications;Volume 64; Issue 1
metadata.lang: -
metadata.name: dc.subject
metadata.value: Annelida
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Eunicida
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: nervous system
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: musculature
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: confocal microscopy
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Musculature and innervation of the pygidium in Eunicida (Annelida: Errantia)
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 3511-Article Text-10691-1-10-20190524.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/15791/1/3511-Article%20Text-10691-1-10-20190524.pdf
resources.format: Adobe PDF
resources.size: 3,87 MB