Two Sources of Mesoderm in Brachiopods.
Brachiopoda
Lophophorata
coelom
development
mesoderm
ontogeny
Journal
Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections
ISSN: 1608-3105
Titre abrégé: Dokl Biol Sci
Pays: United States
ID NLM: 7505459
Informations de publication
Date de publication:
08 Jan 2024
08 Jan 2024
Historique:
received:
20
10
2023
accepted:
31
10
2023
revised:
31
10
2023
medline:
8
1
2024
pubmed:
8
1
2024
entrez:
8
1
2024
Statut:
aheadofprint
Résumé
In Bilateria, the formation of the coelomic mesoderm occurs in various ways and is of great significance for comparative embryology and phylogeny. Several early ontogenetic stages were studied in the brachiopod Coptothyris grayi by scanning electron microscopy and cytochemistry combined with confocal laser microscopy. Two sources of the mesoderm were observed to form simultaneously from the anterior and posterior walls of the archenteron at the gastrula stage. Both anterior and posterior rudiments form enterocoely as unpaired protrusions of the wall of the archenteron and are subsequently separated from it. The findings confirmed the previous data on enterocoely in brachiopods. Moreover, a dual origin of the coelomic mesoderm from an anterior and a posterior precursor was for the first time demonstrated for all brachiopods. Analysis of the literature showed that two sources of the coelomic mesoderm in ontogeny are characteristic of representatives of various groups of protostomes and deuterostomes. This fact may provide evidence for the earlier hypothesis of plesiomorphy of two sources of the mesoderm in Bilateria.
Identifiants
pubmed: 38190043
doi: 10.1134/S0012496623700837
pii: 10.1134/S0012496623700837
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2023. Pleiades Publishing, Ltd.
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