Placida dendritica (Alder & Hancock, 1843)
Author & date of last revision: Ian Smith on 20 January 2013
Hermaea dendritica Alder & Hancock, 1843;
Body (excluding appendages)
Key identification features
Ecology and behaviour
In a study in Oregon, USA, P. dendritica on Codium spp. were generally smaller than those on Bryopsis corticulans, and, when similar sized individuals were compared, those on Codium had more numerous and shorter cerata, wider bodies and smaller more numerous radular teeth than those on Bryopsis. Diet changes induced morphological changes (Trowbridge).
Simultaneous hermaphrodite. Spawn in a coil of about one and a half turns , with up to 850 ova, deposited May-June on Codium. Shelled veligers drift as plankton before transforming into adults.