Eveline du Bois-Reymond Marcus (6 October 1901 – 31 January 1990) was a German

zoologist Zoology ( , ) is the scientific study of animals. Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. Zoology is one ...

and

drawer A drawer ( ) is a box-shaped container inside a piece of furniture that can be pulled out horizontally to access its contents. Drawers are built into numerous types of furniture, including cabinets, chests of drawers (bureaus), desks, and ...

Life

Eveline Du Bois-Reymond was the youngest daughter of Rene and Frieda du Bois-Reymond, as well as a granddaughter of physiologist

Emil Du Bois-Reymond Emil Heinrich du Bois-Reymond (7 November 1818 – 26 December 1896) was a German physiologist, the co-discoverer of nerve action potential, and the developer of experimental electrophysiology. His lectures on science and culture earned him grea ...

. Her father was also a professor of physiology at

Berlin University The Humboldt University of Berlin (, abbreviated HU Berlin) is a public research university in the central borough of Mitte in Berlin, Germany. The university was established by Frederick William III on the initiative of Wilhelm von Humboldt ...

. Her interest in zoology started when she was still a young girl and used to watch small animals in her father's microscope.Corrêa, D.D. (1991) Dr Eveline du Bois-Reymond Marcus. ''Hydrobiologia'', 227: xxiii-xxvi. From 1923 to 1924, she attended zoology courses at the

, but did not conclude them because she met a professor of zoology, Ernst Marcus and married him. Together, they started a strong collaboration in zoology, including the study of several invertebrate groups, such as

protozoan Protozoa (: protozoan or protozoon; alternative plural: protozoans) are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris. Historically ...

ctenophore Ctenophora (; : ctenophore ) is a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea waters worldwide. They are notable for the groups of cilia they use for swimming (commonly referred to as "combs"), and they ar ...

flatworm Platyhelminthes (from the Greek language, Greek πλατύ, ''platy'', meaning "flat" and ἕλμινς (root: ἑλμινθ-), ''helminth-'', meaning "worm") is a Phylum (biology), phylum of relatively simple bilaterian, Segmentation (biology), ...

s, nemertines,

annelid The annelids (), also known as the segmented worms, are animals that comprise the phylum Annelida (; ). The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist in and have adapted to vario ...

tardigrade Tardigrades (), known colloquially as water bears or moss piglets, are a phylum of eight-legged segmented micro-animals. They were first described by the German zoologist Johann August Ephraim Goeze in 1773, who called them . In 1776, th ...

onychophoran Onychophora (from , , "claws"; and , , "to carry"), commonly known as velvet worms (for their velvety texture and somewhat wormlike appearance) or more ambiguously as peripatus (after the first described genus, '' Peripatus''), is a phylum of e ...

s, bryozoans,

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

s, and

pycnogonid Sea spiders are marine arthropods of the class Pycnogonida, hence they are also called pycnogonids (; named after ''Pycnogonum'', the type genus; with the suffix '). The class includes the only now-living order Pantopoda ( ‘all feet’), alongs ...

s. She was not listed as an author in their first works together in order to justify Marcus' full-time position as a professor and because she never accepted a remunerated job. In 1936, due to the rise of

Nazism Nazism (), formally named National Socialism (NS; , ), is the far-right totalitarian socio-political ideology and practices associated with Adolf Hitler and the Nazi Party (NSDAP) in Germany. During Hitler's rise to power, it was fre ...

in Germany, Marcus was dismissed from his job and the couple moved to

São Paulo São Paulo (; ; Portuguese for 'Paul the Apostle, Saint Paul') is the capital of the São Paulo (state), state of São Paulo, as well as the List of cities in Brazil by population, most populous city in Brazil, the List of largest cities in the ...

, where Marcus had been invited to teach at the

University of São Paulo The Universidade de São Paulo (, USP) is a public research university in the Brazilian state of São Paulo, and the largest public university in Brazil. The university was founded on 25 January 1934, regrouping already existing schools in ...

. During

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

, the couple could not travel to the sea coast because of their German origin. As a result, they dedicated their time to the study of freshwater and land invertebrates, especially

turbellarian The Turbellaria are one of the traditional sub-divisions of the phylum Platyhelminthes (flatworms), and include all the sub-groups that are not exclusively parasitic. There are about 4,500 species, which range from to large freshwater forms mor ...

s. After her husband's death in 1968, Du Bois-Reymond Marcus continued their studies, publishing about 30 papers, mostly on

opisthobranch Opisthobranchs () is a now informal name for a large and diverse group of specialized complex gastropods which used to be united in the subclass Opisthobranchia. That taxon is no longer considered to represent a monophyletic grouping. Euopistho ...

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

s. In 1973, she was elected an Honorary Member of the Brazilian Malacological Society and in 1979 of the

Malacological Society of London The Malacological Society of London is a British learned society and charitable organisation concerned with malacology, the study of molluscs, a large phylum of invertebrate animals divided into nine or ten taxonomic classes, of which two are e ...

. She was also awarded with the title of Doctor Honoris Causa by the University of São Paulo in 1976 and by the

University of Marseille Aix-Marseille University (AMU; ; formally incorporated as ) is a public research university located in the Provence region of southern France. It was founded in 1409 when Louis II of Anjou, Count of Provence, petitioned the Pisan Antipope Alexand ...

in 1988. She died on 31 January 1990 in São Paulo, Brazil, aged 88.

Bibliography

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References

20th-century German zoologists Academic staff of the University of São Paulo Emigrants from Nazi Germany 1901 births 1990 deaths 20th-century Brazilian zoologists German emigrants to Brazil {{Germany-zoologist-stub