Article: Photonegative young in the Triassic lamellibranch Lima lineata (Schlotheim)

The occurrence of young specimens of Lima lineata (Schlotheim) within the lunules of adults of this German Triassic species is held to be due to photonegative habits and points to a possible origin of nest-building in the Limidae. The non-occurrence of this feature in some parts of Germany and its abundance in other parts is believed to depend on whether or not the adult was byssally attached.