''Willisus'' is a
monotypic
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
n
araneomorph
The Araneomorphae (also called the Labidognatha) are an infraorder of spiders. They are distinguishable by chelicerae (fangs) that point diagonally forward and cross in a pinching action, in contrast to the Mygalomorphae (tarantulas and their cl ...
spiders in the family
Cybaeidae
Cybaeidae is a family of spiders first described by Nathan Banks in 1892. The diving bell spider or water spider ''Argyroneta aquatica'' was previously included in this family, but is now in the family Dictynidae.
Genera
, the World Spider Cata ...
containing the single species, ''Willisus gertschi''. It was first described by V. D. Roth in 1981,
and has only been found in
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
.
References
Cybaeidae
Monotypic Araneomorphae genera
Spiders of the United States
{{Araneomorphae-stub