Procambarus youngi

***Procambarus youngi *** er en art av ferskvannskreps innenfor den artsrike slekten *[[Procambarus]]*, og den tilhører underslekten *Ortmannicus* som har en ganske stor utbredelse nord-sør i USA fra omtrent de store sjøene og Appalachene gjennom Midtvesten ned mot Mexico.

Arten hører videre under familien Cambaridae (orden Reptantia) blant tifotkrepserene. *Procambarus youngi* er en av anslagsvis 160 arter i slekten *Procambarus*.

## Taksonomisk plassering
En moderne oppdatering av systematikken gis her på høyere nivå med basis i *WoRMS*-databasens systematikk fra 2013., og på slektsnivået med basis i Fetzner et al (2005) , men med bare et utvalg av de om lag 160 artene gjengitt:

* Orden tifotkrepser (Decapoda) - 2.700 slekter, 15.000 arter Latreille, 1802
** Underorden kreps og krabber Reptantia = Macrura Reptantia
*** Infraorden langhalekreps, kreps og hummere  (Astacidea)
**** Usikker overfamilie ferskvannskreps Astacoidea  Latreille, 1802
***** Usikker familie Cambaridae  Hobbs, 1942
****** *Slekt [[Procambarus]]* - 160 arter
******* *[[Procambarus ablusus]]* Penn, 1963
******* *[[Procambarus acanthophorus]]*  Villalobos, 1948
******* *[[Procambarus acherontis]]* (Lönnberg, 1894)
******* *[[Procambarus acutissimus]]* (Girard, 1852)
******* *[[Procambarus acutus]]* (Girard, 1852)
******* *[[Procambarus advena]]* (LeConte, 1856)
******* *[[Procambarus atkinsoni]]*  (Ortmann, 1913)
******* *[[Procambarus alleni]]*
******* *[[Procambarus ancylus]]* Hobbs, 1958
******* *[[Procambarus angustatus]]* (LeConte, 1856)
******* *[[Procambarus apalachicolae]]* Hobbs, 1942
******* *[[Procambarus atkinsoni]]* (Ortmann, 1913)
******* *[[Procambarus attiguus]]* Hobbs, Jr. & Franz, 1992
******* *[[Procambarus barbiger]]* Fitzpatrick, 1978
******* *[[Procambarus bouveri]]* (Ortmann, 1909)
******* *[[Procambarus braswelli]]* J. E. Cooper, 1998
******* *[[Procambarus brazoriensis]]* Albaugh, 1975
******* *[[Procambarus bivittatus]]*  Hobbs, 1942
******* *[[Procambarus blandingii]]*  (Harlan, 1830)
******* *[[Procambarus braswelli]]*  J. E. Cooper, 1998
******* *[[Procambarus caballeroi]]*  Villalobos, 1944
******* *[[Procambarus caritus]]*  Hobbs, 1981
******* *[[Procambarus catemacoensis]]*  Rojas, Alvarez & Villalobos, 2000
******* *[[Procambarus chacei]]*  Hobbs, 1958
******* *[[Procambarus citlaltepetl]]*  Rojas, Alvarez & Villalobos, 1999
******* *[[Procambarus clarkii]]* «red swamp crayfish» (Girard, 1852)
******* *[[Procambarus clemmeri]]*  Hobbs, 1975
******* *[[Procambarus cometes]]*
******* *[[Procambarus connus]]*
******* *[[Procambarus contrerasi]]* (Creaser, 1931)
******* *[[Procambarus cubensis]]* (Erichson, 1846)
******* *[[Procambarus cuetzalanae]]* Hobbs, 1982
******* *[[Procambarus curdi]]* Reimer, 1975
******* *[[Procambarus delicatus]]*
******* *[[Procambarus digueti]]* (Bouvier, 1897)
******* *[[Procambarus dupratzi]]* Penn, 1953
******* *[[Procambarus echinatus]]* Hobbs, 1956
******* *[[Procambarus econfinae]]* Hobbs, 1942
******* *[[Procambarus elegans]]* Hobbs, 1969
******* *[[Procambarus enoplosternum]]* Hobbs, 1947
******* *[[Procambarus epicyrtus]]* Hobbs, 1958
******* *[[Procambarus erichsoni]]* Villalobos, 1950
******* *[[Procambarus erythrops]]* Relyea & Sutton, 1975
******* *[[Procambarus escambiensis]]* Hobbs, 1942
******* *[[Procambarus evermanni]]* (Faxon, 1890)
******* *[[Procambarus fallax]]* (Hagen, 1870) 
******** marmorkreps *([[Procambarus fallax f. virginalis]])*
******* *[[Procambarus ferrugineus]]* Hobbs & Robison, 1988
******* *[[Procambarus fitzpatricki]]* Hobbs, 1972
******* *[[Procambarus franzi]]* Hobbs & Lee, 1976
******* *[[Procambarus geodytes]]* Hobbs, 1942
******* *[[Procambarus gibbus]]* Hobbs, 1969
******* *[[Procambarus geminus]]* Hobbs, 1975
******* *[[Procambarus gonopodocristatus]]* Villalobos, 1958
******* *[[Procambarus hagenianus]]*  (Faxon, 1884)
******* *[[Procambarus hayi]]*  (Faxon, 1884)
******* *[[Procambarus hinei]]*  (Ortmann, 1905)
******* *[[Procambarus hirsutus]]*  Hobbs, 1958
******* *[[Procambarus howellae]]*  Hobbs, 1952
******* *[[Procambarus hoffmanni]]*  (Villalobos, 1944)
******* *[[Procambarus horsti]]*  Hobbs & Means, 1972
******* *[[Procambarus hortonhobbsi]]*  Villalobos, 1950
******* *[[Procambarus hubbelli ]]* (Hobbs, 1940)
******* *[[Procambarus hybus]]*  Hobbs & Walton, 1957
******* *[[Procambarus incilis]]*  Pennington, 1962
******* *[[Procambarus jaculus]]*  Hobbs & Walton, 1957
******* *[[Procambarus kensleyi]]*  Hobbs, Jr., 1990
******* *[[Procambarus kilbyi]]*  (Hobbs, 1940)
******* *[[Procambarus lagniappe]]*  Black, 1968
******* *[[Procambarus latipleurum]]* Hobbs, 1942
******* *[[Procambarus lecontei]]*  (Hagen, 1870)
******* *[[Procambarus leitheuseri]]*  Franz & Hobbs, 1983
******* *[[Procambarus leonensis]]*  Hobbs, 1942
******* *[[Procambarus lepidodactylus]]*  Hobbs, 1947
******* *[[Procambarus lewisi]]*  Hobbs & Walton, 1959
******* *[[Procambarus liberorum]]*  Fitzpatrick, 1978
******* *[[Procambarus litosternum]]*  Hobbs, 1947
******* *[[Procambarus lophotus]]*  Hobbs & Walton, 1960
******* *[[Procambarus lucifugus]]*  (Hobbs, 1940)
******* *[[Procambarus lunzi]]*  (Hobbs, 1940)
******* *[[Procambarus lylei]]*  Fitzpatrick & Hobbs, 1971
******* *[[Procambarus mancus]]*  Hobbs & Walton, 1957
******* *[[Procambarus marthae]]*  Hobbs, 1975
******* *[[Procambarus medialis]]*  Hobbs, 1975
******* *[[Procambarus llamasi]]*  Villalobos, 1954
******* *[[Procambarus mexicanus]]*  (Erichson, 1846)
******* *[[Procambarus milleri]]* Hobbs, 1971
******* *[[Procambarus mirandai]]* Villalobos, 1954
******* *[[Procambarus morrisi]]* Hobbs, Jr. & Franz, 1991
******* *[[Procambarus natchitochae]]* Penn, 1953
******* *[[Procambarus nechesae]]* Hobbs, Jr., 1990
******* *[[Procambarus nigrocinctus]]* Hobbs, Jr., 1990
******* *[[Procambarus niveus]]* Hobbs & Villalobos, 1964
******* *[[Procambarus nueces]]* Hobbs, Jr. & Hobbs III, 1995
******* *[[Procambarus oaxacae]]*  Hobbs, 1973
******* *[[Procambarus okaloosae]]*  Hobbs, 1942
******* *[[Procambarus olmecorum]]*  Hobbs, 1987
******* *[[Procambarus orcinus]]* Hobbs & Means, 1972
******* *[[Procambarus ortmannii]]*  Villalobos, 1949
******* *[[Procambarus ouachitae]]*  Penn, 1956
******* *[[Procambarus paradoxus]]*  (Ortmann, 1906)
******* *[[Procambarus parasimulans]]*  Hobbs & Robison, 1982
******* *[[Procambarus pallidus]]*  (Hobbs, 1940)
******* *[[Procambarus pearsei]]*  (Creaser, 1934)
******* *[[Procambarus pecki]]* Hobbs, 1967
******* *[[Procambarus penni]]*  Hobbs, 1951
******* *[[Procambarus petersi]]*  Hobbs, 1981
******* *[[Procambarus pictus]]*  (Hobbs, 1940)
******* *[[Procambarus planirostris]]*  Penn, 1953
******* *[[Procambarus plumimanus ]]* Hobbs & Walton, 1958
******* *[[Procambarus pilosimanus ]]* (Ortmann, 1906)
******* *[[Procambarus pogum]]*  Fitzpatrick, 1978
******* *[[Procambarus primaevus]]*  (Packard, 1880)
******* *[[Procambarus pubescens]]*  (Faxon, 1884)
******* *[[Procambarus pubischelae]]*  Hobbs, 1942
******* *[[Procambarus pycnogonopodus]]*  Hobbs, 1942
******* *[[Procambarus raneyi]]*  Hobbs, 1953
******* *[[Procambarus rathbunae]]*
******* *[[Procambarus regalis]]*  Hobbs & Robison, 1988
******* *[[Procambarus regiomontanus]]*  Villalobos, 1954
******* *[[Procambarus reimeri]]* Hobbs, 1979
******* *[[Procambarus riojai]]*  (Villalobos, 1944)
******* *[[Procambarus roberti]]*  Villalobos & Hobbs, 1974
******* *[[Procambarus rodriguezi]]*  Hobbs, 1943
******* *[[Procambarus ruthveni]]*  Pearse, 1911
******* *[[Procambarus versutus]]*  (Hagen, 1870)
******* *[[Procambarus vioscai]]*  Penn, 1946
******* *[[Procambarus seminolae]]*  Hobbs, 1942
******* *[[Procambarus toltecae]]*  Hobbs, 1943
******* *[[Procambarus rathbunae]]*  (Hobbs, 1940)
******* *[[Procambarus sbordonii]]* Hobbs, 1977
******* *[[Procambarus shermani]]*  Hobbs, 1942
******* *[[Procambarus spiculifer]]*  (LeConte, 1856)
******* *[[Procambarus steigmani]]*
******* *[[Procambarus strenthi]]*  Hobbs, 1977
******* *[[Procambarus suttkusi]]*  Hobbs, 1953
******* *[[Procambarus tenuis]]*  Hobbs, 1950
******* *[[Procambarus texanus]]* Hobbs, 1971
******* *[[Procambarus teziutlanensis]]*  (Villalobos, 1947)
******* *[[Procambarus tlapacoyanensis]]*  (Villalobos, 1947)
******* *[[Procambarus troglodytes]]*  (LeConte, 1856)
******* *[[Procambarus vasquezae]]*  Villalobos, 1954
******* *[[Procambarus veracruzanus]]*  Villalobos, 1954
******* *[[Procambarus verrucosus]]*  Hobbs, 1952
******* *[[Procambarus viaeviridis]]*  (Faxon, 1914)
******* *[[Procambarus villalobosi]]*  Hobbs, 1969
******* *[[Procambarus williamsoni]]*  (Ortmann, 1905)
******* *[[Procambarus xilitlae]]*  Hobbs & Grubbs, 1982
******* *[[Procambarus xochitlanae]]*  Hobbs, 1975
******* *Procambarus youngi*  Hobbs, 1942
******* *[[Procambarus zapoapensis]]*  Villalobos, 1954
******* *[[Procambarus zihuateutlensis]]*  Villalobos, 1950
******* *[[Procambarus zonangulus]]*  Hobbs, Jr. & Hobbs III, 1990

## Referanser


## Kilder
* Sammy de Grave, et. al., «A classification of living and fossil genera of decapod crustaceans», i: *Raffles Bulletin of Zoology*. Suppl. 21, 2009, side 1–109.
* Horton H. Hobbs, Jr.., "The subgenera of the crayfish genus Procambarus (Decapoda: Astacidae)", i: *Smithsonian Contributions to Zoology* nr 117, 1972, side 1–22 (PDF).
* Horton H. Hobbs, Jr., "On the distribution of the crayfish genus Procambarus (Decapoda: Cambaridae)", i: *Journal of Crustacean Biology* nummer 4 (1), 1984, side 12–24. doi:10.2307/1547892. JSTOR 1547892.

## Eksterne lenker
* 
* Global Crayfish Resources - *The Carnegie Museum of Natural History* (eng). Besøkt 27. januar 2014.