# Faxonius

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{{Short description|Genus of crayfishes}}
{{Automatic taxobox
|image=Orconectes limosus - Kamberkrebs.jpg	
|image_caption=''Faxonius limosus''
|image_alt=Faxonius limosus
|taxon=Faxonius
|authority=Ortmann, 1905
|type_species           = ''Faxonius limosus''
|type_species_authority = Rafinesque, 1817
}}

'''''Faxonius''''' is a genus of [freshwater crayfish](/source/crayfish) in the family [Cambaridae](/source/Cambaridae). There are more than 90 described species in ''Faxonius''.<ref name=gbif/> It includes the [rusty crayfish](/source/rusty_crayfish), an [invasive species](/source/invasive_species) in [North America](/source/North_America), and three species, ''F. virilis'', ''F. immunis'', and ''F. limosus'', that are invasive to [Europe](/source/Europe).

This genus was formerly considered a subgenus of ''[Orconectes](/source/Orconectes)''. Several former ''Orconectes'' species were added to this genus in 2017, leaving only the [cave dwelling](/source/troglobite) species unchanged. 

==Species==
These species belong to the genus ''Faxonius'':<ref name=oxford/>
{{Div col|colwidth=29em}}
* ''[Faxonius acares](/source/Faxonius_acares)'' <small>([Fitzpatrick](/source/Joseph_F._Fitzpatrick_Jr.), 1965)</small>
* ''[Faxonius alabamensis](/source/Faxonius_alabamensis)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius alluvius](/source/Faxonius_alluvius)'' <small>(Simon & McMurray, 2014)</small>
* ''[Faxonius barrenensis](/source/Faxonius_barrenensis)'' <small>(Rhoades, 1944)</small>
* ''[Faxonius bellator](/source/Faxonius_bellator)'' <small>Bloom, McCall, Schuster & Blanton, 2019</small><ref>{{Cite web|title=Systematics and description of a new species of ''Faxonius'' Ortmann, 1905 (Decapoda: Astacidea: Cambaridae) from the Red River system of Kentucky and Tennessee, USA|url=https://academic.oup.com/jcb/article/39/1/40/5280214|website=Oxford Academic|access-date=2020-09-10}}</ref>
* ''[Faxonius bisectus](/source/Faxonius_bisectus)'' <small>(Rhoades, 1944)</small>
* ''[Faxonius burri](/source/Faxonius_burri)'' <small>(Taylor & Sabaj, 1998)</small>
* ''[Faxonius carolinensis](/source/Faxonius_carolinensis)'' <small>(Cooper & Cooper, 1995)</small>
* ''[Faxonius castaneus](/source/Faxonius_castaneus)'' <small>(Johnson, 2010)</small>
* ''[Faxonius causeyi](/source/Faxonius_causeyi)'' <small>(Jester, 1967)</small>
* ''[Faxonius chickasawae](/source/Faxonius_chickasawae)'' <small>(Cooper & [Hobbs](/source/Horton_H._Hobbs_Jr.), 1980)</small>
* ''[Faxonius compressus](/source/Faxonius_compressus)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius cooperi](/source/Faxonius_cooperi)'' <small>(Cooper & [Hobbs](/source/Horton_H._Hobbs_Jr.), 1980)</small>
* ''[Faxonius cristavarius](/source/Faxonius_cristavarius)'' <small>(Taylor, 2000)</small>
* ''[Faxonius cyanodigitus](/source/Faxonius_cyanodigitus)'' <small>(Johnson, 2010)</small>
* ''[Faxonius deanae](/source/Faxonius_deanae)'' <small>(Reimer & Jester, 1975)</small>
* ''[Faxonius difficilis](/source/Faxonius_difficilis)'' <small>([Faxon](/source/Walter_Faxon), 1898)</small>
* ''[Faxonius durelli](/source/Faxonius_durelli)'' <small>(Bouchard & Bouchard, 1995)</small>
* ''[Faxonius elix](/source/Faxonius_elix)'' <small>Couch & Hayes, 2022</small><ref>{{Cite web|title=Description of a new species of crayfish in the genus Faxonius (Decapoda: Cambaridae) from the Lower Ohio River Drainage, with evidence of glacial influence on the distribution of some crayfish species throughout the Ohio River basin|url=https://www.biotaxa.org/Zootaxa/article/view/zootaxa.5165.3.3|website=Zootaxa|access-date=2022-08-15}}</ref>
* ''[Faxonius erichsonianus](/source/Faxonius_erichsonianus)'' <small>([Faxon](/source/Walter_Faxon), 1898)</small>
* ''[Faxonius etnieri](/source/Faxonius_etnieri)'' <small>(Bouchard & Bouchard, 1976)</small>
* ''[Faxonius eupunctus](/source/Faxonius_eupunctus)'' <small>(Williams, 1952)</small>
* ''[Faxonius forceps](/source/Faxonius_forceps)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius harrisonii](/source/Faxonius_harrisonii)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius hartfieldi](/source/Faxonius_hartfieldi)'' <small>([Fitzpatrick](/source/Joseph_F._Fitzpatrick_Jr.) & Suttkus, 1992)</small>
* ''[Faxonius hathawayi](/source/Faxonius_hathawayi)''
** ''[Faxonius hathawayi blacki](/source/Faxonius_hathawayi_blacki)'' <small>(Walls, 1972)</small>
** ''[Faxonius hathawayi hathawayi](/source/Faxonius_hathawayi_hathawayi)'' <small>(Penn, 1952)</small>
* ''[Faxonius hobbsi](/source/Faxonius_hobbsi)'' <small>(Penn, 1950)</small>
* ''[Faxonius holti](/source/Faxonius_holti)'' <small>(Cooper & [Hobbs](/source/Horton_H._Hobbs_Jr.), 1980)</small>
* ''[Faxonius hylas](/source/Faxonius_hylas)'' <small>([Faxon](/source/Walter_Faxon), 1890)</small>
* ''[Faxonius illinoiensis](/source/Faxonius_illinoiensis)'' <small>(Brown, 1956)</small>
* ''[Faxonius immunis](/source/Faxonius_immunis)'' <small>(Hagen, 1870)</small>
* ''[Faxonius indianensis](/source/Faxonius_indianensis)'' <small>(Hay, 1896)</small>
* ''[Faxonius jeffersoni](/source/Faxonius_jeffersoni)'' <small>(Rhoades, 1944)</small>
* ''[Faxonius jonesi](/source/Faxonius_jonesi)'' <small>([Fitzpatrick](/source/Joseph_F._Fitzpatrick_Jr.), 1992)</small>
* ''[Faxonius juvenilis](/source/Faxonius_juvenilis)'' <small>(Hagen, 1870)</small>
* ''[Faxonius kentuckiensis](/source/Faxonius_kentuckiensis)'' <small>(Rhoades, 1944)</small>
* ''[Faxonius lancifer](/source/Faxonius_lancifer)'' <small>(Hagen, 1870)</small>
* ''[Faxonius leptogonopodus](/source/Faxonius_leptogonopodus)'' <small>([Hobbs](/source/Horton_H._Hobbs_Jr.), 1948)</small>
* ''[Faxonius limosus](/source/Faxonius_limosus)'' <small>(Rafinesque, 1817)</small>
* ''[Faxonius longidigitus](/source/Faxonius_longidigitus)'' <small>([Faxon](/source/Walter_Faxon), 1898)</small>
* ''[Faxonius luteus](/source/Faxonius_luteus)'' <small>(Creaser, 1933)</small>
* ''[Faxonius macrus](/source/Faxonius_macrus)'' <small>(Williams, 1952)</small>
* ''[Faxonius maletae](/source/Faxonius_maletae)'' <small>(Walls, 1972)</small>
* ''[Faxonius marchandi](/source/Faxonius_marchandi)'' <small>([Hobbs](/source/Horton_H._Hobbs_Jr.), 1948)</small>
* ''[Faxonius margorectus](/source/Faxonius_margorectus)'' <small>(Taylor, 2002)</small>
* ''[Faxonius medius](/source/Faxonius_medius)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius meeki](/source/Faxonius_meeki)''
** ''[Faxonius meeki brevis](/source/Faxonius_meeki_brevis)'' <small>(Williams, 1952)</small>
** ''[Faxonius meeki meeki](/source/Faxonius_meeki_meeki)'' <small>([Faxon](/source/Walter_Faxon), 1898)</small>
* ''[Faxonius menae](/source/Faxonius_menae)'' <small>(Creaser, 1933)</small>
* ''[Faxonius mirus](/source/Faxonius_mirus)'' <small>(Ortmann, 1931)</small>
* ''[Faxonius mississippiensis](/source/Faxonius_mississippiensis)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius nais](/source/Faxonius_nais)'' <small>([Faxon](/source/Walter_Faxon), 1885)</small>
* ''[Faxonius nana](/source/Faxonius_nana)'' <small>(Williams, 1952)</small>
* ''[Faxonius neglectus](/source/Faxonius_neglectus)''
** ''[Faxonius neglectus chaenodactylus](/source/Faxonius_neglectus_chaenodactylus)'' <small>(Williams, 1952)</small>
** ''[Faxonius neglectus neglectus](/source/Faxonius_neglectus_neglectus)'' <small>([Faxon](/source/Walter_Faxon), 1885)</small>
* ''[Faxonius obscurus](/source/Faxonius_obscurus)'' <small>(Hagen, 1870)</small>
* ''[Faxonius occidentalis](/source/Faxonius_occidentalis)'' <small>(Johnson, 2010)</small>
* ''[Faxonius ozarkae](/source/Faxonius_ozarkae)'' <small>(Williams, 1952)</small>
* ''[Faxonius pagei](/source/Faxonius_pagei)'' <small>(Taylor & Sabaj, 1997)</small>
* ''[Faxonius palmeri](/source/Faxonius_palmeri)''
** ''[Faxonius palmeri creolanus](/source/Faxonius_palmeri_creolanus)'' <small>(Creaser, 1933)</small>
** ''[Faxonius palmeri longimanus](/source/Faxonius_palmeri_longimanus)'' <small>([Faxon](/source/Walter_Faxon), 1898)</small>
** ''[Faxonius palmeri palmeri](/source/Faxonius_palmeri_palmeri)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius pardalotus](/source/Faxonius_pardalotus)'' <small>(Wetzel, Poly & Fetzner, 2005)</small>
* ''[Faxonius perfectus](/source/Faxonius_perfectus)'' <small>(Walls, 1972)</small>
* ''[Faxonius peruncus](/source/Faxonius_peruncus)'' <small>(Creaser, 1931)</small>
* ''[Faxonius placidus](/source/Faxonius_placidus)'' <small>(Hagen, 1870)</small>
* ''[Faxonius propinquus](/source/Faxonius_propinquus)'' <small>(Girard, 1852)</small><ref>{{Cite web|title=NAS - Nonindigenous Aquatic Species|url=https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=2249|website=USGS|access-date=2020-08-19}}</ref>
* ''[Faxonius punctimanus](/source/Faxonius_punctimanus)'' <small>(Creaser, 1933)</small>
* ''[Faxonius putnami](/source/Faxonius_putnami)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius quadruncus](/source/Faxonius_quadruncus)'' <small>(Creaser, 1933)</small>
* ''[Faxonius quinebaugensis](/source/Faxonius_quinebaugensis)'' <small>(Mathews & Warren, 2008)</small>
* ''[Faxonius rafinesquei](/source/Faxonius_rafinesquei)'' <small>(Rhoades, 1944)</small>
* ''[Faxonius raymondi](/source/Faxonius_raymondi)'' <small>(Thoma & Stocker, 2009)</small>
* ''[Faxonius rhoadesi](/source/Faxonius_rhoadesi)'' <small>([Hobbs](/source/Horton_H._Hobbs_Jr.), 1949)</small>
* ''[Faxonius ronaldi](/source/Faxonius_ronaldi)'' <small>(Taylor, 2000)</small>
* ''[Faxonius roberti](/source/Faxonius_roberti)'' <small>Fetzner & Taylor, 2018</small><ref name=ZT>{{Cite web|title=Two new species of freshwater crayfish of the genus ''Faxonius'' (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri|url=https://www.mapress.com/j/zt/article/viewFile/zootaxa.4399.4.2/14293|website=Zootaxa|access-date=2020-09-09}}</ref>
* ''[Faxonius rusticus](/source/Faxonius_rusticus)'' <small>(Girard, 1852)</small>
* ''[Faxonius sanbornii](/source/Faxonius_sanbornii)''
** ''[Faxonius sanbornii erismophorous](/source/Faxonius_sanbornii_erismophorous)'' <small>([Hobbs](/source/Horton_H._Hobbs_Jr.) & [Fitzpatrick](/source/Joseph_F._Fitzpatrick_Jr.), 1962)</small>
** ''[Faxonius sanbornii sanbornii](/source/Faxonius_sanbornii_sanbornii)'' <small>([Faxon](/source/Walter_Faxon), 1884)</small>
* ''[Faxonius saxatilis](/source/Faxonius_saxatilis)'' <small>(Bouchard & Bouchard, 1976)</small>
* ''[Faxonius shoupi](/source/Faxonius_shoupi)'' <small>([Hobbs](/source/Horton_H._Hobbs_Jr.), 1948)</small>
* ''[Faxonius sloanii](/source/Faxonius_sloanii)'' <small>(Bundy in Forbes, 1876)</small>
* ''[Faxonius spinosus](/source/Faxonius_spinosus)'' <small>(Bundy, 1877)</small>
* ''[Faxonius stannardi](/source/Faxonius_stannardi)'' <small>(Page, 1985)</small>
* ''[Faxonius taylori](/source/Faxonius_taylori)'' <small>(Schuster, 2008)</small>
* ''[Faxonius texanus](/source/Faxonius_texanus)'' <small>(Johnson, 2010)</small>
* ''[Faxonius theaphionensis](/source/Faxonius_theaphionensis)'' <small>(Simon, Timm & Morris, 2005)</small>
* ''[Faxonius transfuga](/source/Faxonius_transfuga)'' <small>([Fitzpatrick](/source/Joseph_F._Fitzpatrick_Jr.), 1966)</small>
* ''[Faxonius tricuspis](/source/Faxonius_tricuspis)'' <small>(Rhoades, 1944)</small>
* ''[Faxonius validus](/source/Faxonius_validus)'' <small>([Faxon](/source/Walter_Faxon), 1914)</small>
* ''[Faxonius virginiensis](/source/Faxonius_virginiensis)'' <small>([Hobbs](/source/Horton_H._Hobbs_Jr.), 1951)</small>
* ''[Faxonius virilis](/source/Faxonius_virilis)'' <small>(Hagen, 1870)</small>
* ''[Faxonius wagneri](/source/Faxonius_wagneri)'' <small>(Fetzner & Taylor, 2018)</small><ref name=ZT/>
* ''[Faxonius williamsi](/source/Faxonius_williamsi)'' <small>([Fitzpatrick](/source/Joseph_F._Fitzpatrick_Jr.), 1966)</small>
* ''[Faxonius wrighti](/source/Faxonius_wrighti)'' <small>([Hobbs](/source/Horton_H._Hobbs_Jr.), 1948)</small>
* ''[Faxonius yanahlindus](/source/Faxonius_yanahlindus)'' <small>(Taylor, Rhoden & Schuster, 2016)</small>
{{Div col end}}

==See also==
{{Portal|Crustaceans|Arthropods}}
* ''[Faxonella](/source/Faxonella)'', a genus of crayfish

==References==
{{Reflist|refs=
<ref name=gbif>
{{Cite web| title=''Faxonius''
| url=https://www.gbif.org/species/4646327
| website=GBIF
| access-date=2019-12-25
}}</ref>
<ref name=oxford>{{Cite journal |first1=Keith A |last1=Crandall |first2=Sammy |last2=De Grave |date=2017 |title=''An updated classification of the freshwater crayfishes (Decapoda: Astacidea) of the world, with a complete species list'' |journal=Journal of Crustacean Biology |volume=37 |issue=5 |pages=615–653 |doi=10.1093/jcbiol/rux070|doi-access=free }}</ref>
}}

==Further reading==
{{Refbegin}}
* {{Cite journal
| title = An Illustrated Checklist of the American Crayfishes (Decapoda: Astacidae, Cambaridae, and Parastacidae)
| date = 1989
| last1 = Hobbs | first1 = Horton H. Jr.
| journal = Smithsonian Contributions to Zoology
| issue = 480
| pages = 1–236
| doi = 10.5479/si.00810282.480
| url = https://repository.si.edu/bitstream/handle/10088/5542/SCtZ-0480-Lo_res.pdf?sequence=2&isAllowed=y
}}
* {{Cite journal
| title = Annotated checklist of decapod crustaceans of Atlantic coastal and continental shelf waters of the United States
| date = 2003
| last1 = Nizinski | first1 = Martha S.
| journal = Proceedings of the Biological Society of Washington
| volume = 116| issue = 1| pages = 96–157
| issn = 0006-324X
| url = https://research.nhm.org/pdfs/12091/12091.pdf
}}
{{Refend}}

==External links==
{{Commons category|Faxonius}}
*{{Wikispecies-inline|Faxonius|''Faxonius''}}

{{Taxonbar|from=Q32374670}}

Category:Cambaridae
Category:Taxa named by Arnold Edward Ortmann
Category:Decapod genera

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Adapted from the Wikipedia article [Faxonius](https://en.wikipedia.org/wiki/Faxonius) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Faxonius?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.