Development and organization of the larval nervous system in Phoronopsis harmeri: new insights into phoronid phylogeny.

ABSTRACT:

Background

The organization and development of the nervous system has traditionally been used as an important character for establishing the relationships among large groups of animals. According to this criterion, phoronids were initially regarded as deuterostomian but have more recently been regarded as protostomian. The resolving of this conflict requires detailed information from poorly investigated members of phoronids, such as Phoronopsis harmeri.

Results

The serotonin-like immunoreactive part of the P. harmeri nervous system changes during larval development. These changes mostly concern the nervous system of the hood and correlate with the appearance of the median and two marginal neurite bundles, the frontal organ, and the sensory field. The apical organ has bilater

SUBMITTER: Temereva EN 

PROVIDER: S-EPMC3924620 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature