Actinia bicornis Müller, 1776 (original description)
Actinia candida Müller, 1776 accepted as Metridium senile (Linnaeus, 1761) (original description)
Actinia equina (Linnaeus, 1758) (additional source)
Actinia rufa Risso, 1827 (original description)
Actinia truncata Müller, 1776 (original description)
Actinia volva Müller, 1776 (original description)
Akera O. F. Müller, 1776 (original description)
Akera bullata O. F. Müller, 1776 (original description)
Amphitrite auricoma Müller, 1776 accepted as Amphictene auricoma (O.F. Müller, 1776) (original description)
Amphitrite cirrata Müller, 1776 (original description)
Ascidia conchilega Müller, 1776 (original description)
Ascidia mentula Müller, 1776 (original description)
Ascidia prunum Müller, 1776 (original description)
Ascidia virginea Müller, 1776 (original description)
Asterias militaris O.F. Müller, 1776 accepted as Asteriscus militaris (O.F. Müller, 1776) accepted as Pteraster militaris (O.F. Müller, 1776) (original description)
Beroe O.F. Müller, 1776 (original description)
Chondracanthus nodosus (Müller O.F., 1776) (original description)
Echinorhynchus Zoega in Müller, 1776 (original description)
Echinorhynchus gadi Zoega in Müller, 1776 (original description)
Eubalaena glacialis (Müller, 1776) (original description)
Fasciola aeglefini Müller, 1776 accepted as Podocotyle aeglefini (Müller, 1776) Yamaguti, 1954 accepted as Podocotyle simplex (Rudolphi, 1809) Srivastava, 1966 (original description)
Fasciola blennii Müller, 1776 accepted as Steringotrema divergens (Rudolphi, 1809) Odhner, 1911 (original description)
Fasciola lucii Müller, 1776 accepted as Distoma lucii (Müller, 1776) Zeder, 1800 accepted as Azygia lucii (Müller, 1776) Lühe, 1909 (original description)
Fasciola luciopercae Müller, 1776 accepted as Distoma luciopercae (Müller, 1776) accepted as Bunodera luciopercae (Müller, 1776) Lühe, 1909 (original description)
Holothuria penicillus O.F. Müller, 1776 accepted as Thyone fusus (O.F. Müller, 1776) (original description)
Lernaea clavata Müller O.F., 1776 accepted as Peniculus clavatus (O.F. Müller, 1776) (original description)
Lumbricus inaequalis Müller, 1776 (original description)
Lynceus O.F. Müller, 1776 (sensu Martin & Belk, 1988) (original description)
Nereis diversicolor Müller, 1776 accepted as Hediste diversicolor (O.F. Müller, 1776) (original description)
Nereis pinnata Müller, 1776 (original description)
Pecten O. F. Müller, 1776 (original description)
Planaria Müller O.F., 1776 (original description)
Spatangus purpureus O.F. Müller, 1776 (original description)
Spongia officinalis Linnaeus, 1759 represented as Spongia (Spongia) officinalis Linnaeus, 1759 (additional source)
Terebratula Müller, 1776 (original description)
Volvox bicaudatus C.Linnaeus, 1767 accepted as Pleurobrachia pileus (O. F. Müller, 1776) (source of synonymy)