The anatomy and development of the nervous system in Magelonidae (Annelida) - insights into the evolution of the annelid brain.

ABSTRACT:

Background

The annelid anterior central nervous system is often described to consist of a dorsal prostomial brain, consisting of several commissures and connected to the ventral ganglionic nerve cord via circumesophageal connectives. In the light of current molecular phylogenies, our assumptions on the primary design of the nervous system in Annelida has to be reconsidered. For that purpose we provide a detailed investigation of the adult nervous system of Magelonidae - a putatively basally branching annelid family - and studied early stages of the development of the latter.

Results

Our comparative investigation using an integrative morphological approach shows that the nervous system of Magelonidae is located inside the epidermis. The brain is composed of an anterior compac

SUBMITTER: Beckers P 

PROVIDER: S-EPMC6714456 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature