Ernst Gustav Gotthelf Marcus, German-born Jewish Brazilian zoologist (Berlin 08 June 1893 – São Paulo 30 June 1968)
World authority on Mollusca Opisthobranchia, Bryozoa and Turbellaria
Authored over 215 works
Studied bryozoans, oligochaetes, pycnogonids, pantopods, ctenophores, tardigrades, turbellarians, mollusks, nemertineans and onychophores
Discovered and described Class Heterotardigrada (1927)
DESCRIBED NEW TAXA
Turbellaria
Families
Chordariidae 1945
Gnesioceratidae 1966
Scleraulophoridae 1950
Taenioplanidae 1966
Theamatidae 1949
Urostomatidae 1951
Urostomidae 1951
Genera
63
Species
With E. Marcus described over 300 marine species
Mollusca
Genera
Awuka 1955
Felimare 1967 (with Eveline)
Ganitus 1953
Inuda 1967 (with Eveline)
Lapinura 1970 (with Eveline)
Miesea 1961
Mourgona 1970 (with Eveline)
Muessa 1965
Nanuca 1957
Njurja 1959 (with Eveline)
Nuvuca 1967 (with Eveline)
Pinufius 1959 (with Eveline)
Piseinotecus 1955
Pleurehdera 1970 (with Eveline)
Pluscula 1953 (with Eveline)
Sapha 1959
Sebadoris 1959 (with Eveline)
Siraius 1955
Taringa 1955
Tayuva 1967 (with Eveline)
Uneba 1953
Species
222 in Mollusca Opisthobranchia
Bryozoa
Genera
Aeverrillia 1941
Crisevia 1937
Euteleia 1938
Haplota 1940
Sangavella 1957
Utinga 1949
Annelida
Genera
Jolydrilus 1965
Wapsa 1965
Protozoa
Genus
Sawayaella 1939
HONORS
Marcusia Hyman 1953 (Turbellaria)
Marcusiaxius Carvalho & Rodrigues 1973 (Crustacea)
Marcusadorea Vieira, Migotto & Winston 2010 (Cnidaria)
Marcusopora Pohowsky 1978 (Fossil Bryozoa)
Subgenus Marcusiella Luther 1955 (Turbellaria)
His wife, Eveline Agnes du Bois-Reymond Marcus, German-born Brazilian invertebrate zoologist (Berlin 06 October 1901 – São Paulo 31 January 1990)
Famous physiologist Emil du Bois-Reymond was her relative
Discovered the accessory vessel of Phoronids (1949)
DESCRIBED NEW TAXA
Mollusca
Family
Bosellidae 1982
Genera
Ascobulla 1972
Dondice 1958
Felimare 1967 (with Ernst)
Felimida 1971 (With Ernst)
Inuda 1967 (with Ernst)
Lapinura 1970 (with Ernst)
Macfarlandaea 1984 with Gosliner
Mourgona 1970 (with Ernst)
Mysouffa 1974
Njurja 1959 (with Ernst)
Nuvuca 1967 (with Ernst)
Pattyclaya 1982
Percunas 1970
Pinufius 1959 (with Ernst)
Pleurehdera 1970 (with Ernst)
Pluscula 1953 (with Ernst)
Roburnella 1982
Sebadoris 1959 (with Ernst)
Tayuva 1967 (with Ernst)
Tornastra 1977
Species
222 in Mollusca Opisthobranchia
Turbellaria
Genera
Amyris 1968 (with Ernst)
Igluta 1968 (with Ernst)
Puiteca 1955
Pupsikus 1970 (with Ernst)
Toia 1952
Yagua 1958
Tardigrada
Genera
Bryochoerus 1936
Orzeliscus 1952
Mopsechiniscus 1944
Annelida
Genus
Siolidrilus 1949
Nemertea
Genus
Siolineus 1948
HONORS
Marcusaedrilus Righi & Kanner 1979 (Annelida Oligochaeta)
Marcusiola Steinböck 1966 (Turbellaria)
Emarcusia Roller 1972 (Mollusca)
Evelineus Correa 1954 (Nemertea)