Myogenesis of Siboglinum fiordicum sheds light on body regionalisation in beard worms (Siboglinidae, Annelida).

ABSTRACT:

Background

Many annelids, including well-studied species such as Platynereis, show similar structured segments along their body axis (homonomous segmentation). However, numerous annelid species diverge from this pattern and exhibit specialised segments or body regions (heteronomous segmentation). Recent phylogenomic studies and paleontological findings suggest that a heteronomous body architecture may represent an ancestral condition in Annelida. To better understand the segmentation within heteronomous species we describe the myogenesis and mesodermal delineation of segments in Siboglinum fiordicum during development.

Results

Employing confocal and transmission electron microscopy we show that the somatic longitudinal musculature consists of four separate strands, among whi

SUBMITTER: Rimskaya-Korsakova N 

PROVIDER: S-EPMC8447566 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature