Inner most body wall muscle fibers arrayed along the anteroposterior axis. These fibers are thicker than the outer longitudinal muscle fibers. The pattern of these muscles differs along the dorsoventral axis, with the dorsal arrangement converging at the central zone of the anterior pole. The ventral arrangement is more parallel or may diverge slightly as it approaches the ventral pole. [ ]

Inner most body wall muscle fibers arrayed along the anteroposterior axis. These fibers are thicker than the outer longitudinal muscle fibers. The pattern of these muscles differs along the dorsoventral axis, with the dorsal arrangement converging at the central zone of the anterior pole. The ventral arrangement is more parallel or may diverge slightly as it approaches the ventral pole. [ https://github.com/obophenotype/planaria-ontology/blob/master/metadata/planarefs/planaref-0000003.md http://www.ncbi.nlm.nih.gov/pubmed/26904543 ]

Synonyms: inner longitudinal muscle fiber inner longitudinal muscle layer