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Species:
Keratella cochlearis (Gosse, 1851) 		Valid Name:
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Parent taxa:             Genus / Family / Order / Superorder / Subclass / Class
Keratella: Brachionidae: Ploima: Pseudotrocha: Monogononta: Eurotatoria 		Taxonomic / nomenclatural notes:
• Keratella cochlearis irregularis (Lauterborn) after Daems & Dumont (1974) [Ref.17116]; K. stipitata (Ehrenberg) after Carlin (1945, partim) [Ref.11450]; Anuraea stipitata Ehrenberg after Hauer (1952) [Ref.11362], Donner (1954) [Ref.10453].
not Keratella cochlearis (Gosse) after Gillard (1967) [Ref.17225], Koste (1972) [Ref.17331], Keratella cochlearis ssp. nov. after Nogrady (1980) [Ref.11284] [=Keratella cochlearis pachyacantha Thomasson, 1980]
• Polymorphic species with a number of sub- and infrasubspecific taxa of uncertain taxonomic status. Probably represents a complex of cryptic species with narrower geographic ranges and/or ecological tolerances.
Nomenclatural status:
name in current use 		Species group name declinable:
yes 		Validity:
valid 		Taxon Rank:
Species 		Availability:
available
Original Combination:
Anuraea cochlearis 		Original Spelling:
Anuræa cochlearis 		Latest Revision:
Koste, W (1978): Rotatoria. Die Rädertiere Mitteleuropas. Ein Bestimmungswerk, begründet von Max Voigt. Überordnung Monogononta. 673, 234 pls.
Page last modified on: 21.12.2020 by C.D. Jersabek
Original description
 
Gosse, P H (1851): The Annals and Magazine of Natural History (ser. 2) 8
p.202
Gosse, P H (1851): The Annals and Magazine of Natural History (ser. 2) 8 p.202
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Literature documentations
 
Hudson, C T;P H Gosse (1886): The Rotifera; or wheel-animalcules, both British and foreign. I+II
Hudson, C T;P H Gosse (1886): The Rotifera; or wheel-animalcules, both British and foreign. I+II
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Observation images
 
Image courtesy of ANSP (Jersabek et al. 2003) [Ref.15798]; female lorica, dorsal view
Image courtesy of ANSP (Jersabek et al. 2003) <a href='../../Reference/Index/15798' target='_blank'>[Ref.15798]</a>; female lorica, dorsal view
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Ahlstrom, E H, 1943 Bulletin of the American Museum of Natural History80
Althaus, B, 1957 Wissenschaftliche Zeitschrift der Martin-Luther-Universität Halle-Wittenberg6 
Amren, H, 1964 Zoologiska Bidrag från Uppsala36 
Arora, H C, 1966 Archiv für Hydrobiologie61 
Athibai, S;H Segers;L Sanoamuang, 2013 Journal of Limnology72 
Baker, R L, 1979 Canadian Journal of Zoology57 
Branco, C W C;B Kozlowsky-Suzuki;S Jose De Paggi, 2005 Studies on Neotropical Fauna and Environment40 
Carlin, B, 1945 Medlemsblad för Biologilärarnas Förening1 
Chengalath, R;C H Fernando;M G George, 1971 University of Waterloo Biology Series2 
Chengalath, R;C H Fernando;W Koste, 1973 Bulletin of the Fisheries Research Station of Sri Lanka (Ceylon)24 
Chengalath, R;W Koste, 1987 Hydrobiologia147 
Chung, C E;H B Yoo;S Y Kim, 1992 The Korean Journal of Systematic Zoology8 
Cieplinski, A;T Weisse;U Obertegger, 2016 Hydrobiologia  
Daems, G;H J Dumont, 1974 Biologisch Jaarboek (Dodonaea)42 
De Manuel, J, 1991 Verhandlungen der internationalen Vereinigung für Limnologie24 
De Manuel, J, 2000 Limnetica19 
De Smet, W H;G Melone;D Fontaneto;F Leasi, 2015 Fauna d'Italia50 
Donner, J, 1954 Österreichische Zoologische Zeitschrift5Keratella stipitata (Ehrenberg, 1838)
Donner, J, 1964 Archiv für Hydrobiologie, Supplement27/1Keratella cochlearis cochlearis (Gosse, 1851)
Donner, J, 1972 Archiv für Hydrobiologie, Supplement44 
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Taxon(sorted ascending)
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Keratella cochlearis f. aspina Green, 2005 no nomenclatural status
Keratella cochlearis f. macracantha (Lauterborn, 1898) junior subjective synonym of nominotypical taxon
Keratella cochlearis f. micracantha (Lauterborn, 1900) no nomenclatural status
Keratella cochlearis f. robusta (Lauterborn, 1900) junior subjective synonym of nominotypical taxon
Keratella cochlearis f. tuberculata (Lauterborn, 1900) no nomenclatural status
Keratella cochlearis var. baicalensis Gaigalas, 1958 junior subjective synonym of nominotypical taxon
Keratella cochlearis var. faluta Ahlstrom, 1943 no nomenclatural status
Keratella cochlearis var. hispida f. ecauda (Ammann, 1921) no nomenclatural status
Keratella cochlearis var. hispida f. microcantha Słonimski, 1932 no nomenclatural status
Keratella cochlearis var. hispida f. pustulata (Lauterborn, 1900) no nomenclatural status
Keratella cochlearis var. hispida (Lauterborn, 1898) junior subjective synonym of nominotypical taxon
Keratella cochlearis var. leptacantha f. ecaudata (Lauterborn, 1900) no nomenclatural status
Keratella cochlearis var. leptacantha (Lauterborn, 1900) junior subjective synonym of nominotypical taxon
Keratella cochlearis var. recurvispina (Jägerskiöld, 1894) junior subjective synonym of nominotypical taxon
Keratella cochlearis var. scutiformis Delachaux, 1927 junior subjective synonym of nominotypical taxon
Keratella longispina (Imhof, 1883) junior subjective synonym
Keratella stipitata (Ehrenberg, 1838) junior subjective synonym
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Taxon(sorted ascending)
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Keratella cochlearis f. aspina Green, 2005 no nomenclatural statusFormanot available
Keratella cochlearis f. macracantha (Lauterborn, 1898) junior subjective synonym of nominotypical taxonFormaavailable
Keratella cochlearis f. micracantha (Lauterborn, 1900) no nomenclatural statusFormanot available
Keratella cochlearis f. robusta (Lauterborn, 1900) junior subjective synonym of nominotypical taxonFormaavailable
Keratella cochlearis f. tuberculata (Lauterborn, 1900) no nomenclatural statusFormanot available
Keratella cochlearis var. baicalensis Gaigalas, 1958 junior subjective synonym of nominotypical taxonVarietasavailable
Keratella cochlearis var. baltica Sokolova, 1927 junior subjective synonymVarietasavailable
Keratella cochlearis var. faluta Ahlstrom, 1943 no nomenclatural statusVarietasnot available
Keratella cochlearis var. hispida f. ecauda (Ammann, 1921) no nomenclatural statusFormanot available
Keratella cochlearis var. hispida f. microcantha Słonimski, 1932 no nomenclatural statusFormanot available
Keratella cochlearis var. hispida f. pustulata (Lauterborn, 1900) no nomenclatural statusFormanot available
Keratella cochlearis var. hispida (Lauterborn, 1898) junior subjective synonym of nominotypical taxonVarietasavailable
Keratella cochlearis var. leptacantha f. ecaudata (Lauterborn, 1900) no nomenclatural statusFormanot available
Keratella cochlearis var. leptacantha (Lauterborn, 1900) junior subjective synonym of nominotypical taxonVarietasavailable
Keratella cochlearis var. punctata Myers, 1938 no nomenclatural statusVarietasnot available
Keratella cochlearis var. recurvispina (Jägerskiöld, 1894) junior subjective synonym of nominotypical taxonVarietasavailable
Keratella cochlearis var. scutiformis Delachaux, 1927 junior subjective synonym of nominotypical taxonVarietasnot available
Keratella cochlearis nordica Kutikova, 1978 name in current useSubspeciesavailable
Keratella cochlearis pachyacantha Thomasson, 1980 name in current useSubspeciesavailable
Keratella cochlearis polaris De Smet & Bafort, 1990 name in current useSubspeciesavailable
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IUILocality(sorted ascending)
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Aberger Schotterteich (Fürth)
Open water / Pond, freshwater12.08.1986CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Attersee
Open water / Lake, freshwater (ultraoligotrophic)08.09.1999CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Autobahnsee Viehhausen
Open water / Pond, freshwater11.07.2016CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Baga Nuur
Open water (littoral) / Lake, freshwater08.09.2006Expedition, Literature / - / Published Information1
L
 
Baggersee 2, Wals
Open water / Lake, freshwater (artificial)13.07.2021CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Baltic Sea
- / Sea05.10.1911Collection / - / Specimen preparations2048
C
 
Bayan Nuur (A)
Open water (littoral and offshore) / Lake, freshwater10.09.2006Expedition, Literature / - / Published Information1
L
 
Bear River Refuge
- / -01.01.1926Collection / - / Specimen preparations2048
C
 
Bear River Refuge
- / -01.01.1936Collection / - / Specimen preparations2048
C
?
Bear River Refuge
- / -01.01.1936Collection / - / Specimen preparations2048
C
 
Böndlsee
Open water / Lake, freshwater27.06.2012CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Bräviken vid Lindö
- / Sea13.08.1935Collection / - / Specimen preparations2048
C
 
Bürmoos, bog pond
Open water / Bog pond18.08.1988CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Bürmooser See
Open water / Pond, freshwater (eutrophic)18.08.2009CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Chorchoi Nuur
Open water (littoral) / Pond, freshwater22.07.2005Expedition, Literature / - / Published Information4
L
 
Ebinger Badesee
Open water / Pond, freshwater (hypertrophic)13.09.2018CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Echo Lake
- / -23.06.1938Collection / - / Specimen preparations2048
C
 
Egelsee (Grosser)
Open water / Pond, freshwater (dystrophic)18.09.2019CJ unpubl. / - / Unpublished Information, own observations (CJ)1
f. micracantha
F
 
Egelsee (Kleiner)
Open water / Pond, freshwater (dystrophic)23.09.2015CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Egelsee (Mittlerer)
Open water / Pond, freshwater (dystrophic)18.09.2019CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
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Repository
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ANSP 0831 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis var. recurvispina (Jägerskiöld, 1894) 		 female1 
ANSP 0608 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis recurvispina (Jägerskiöld, 1894) 		 females4 
ANSP 0637 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis (Gosse, 1851) 		 females18 
ANSP 1366 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis recurvispina (Jägerskiöld, 1894) 		 females7 
ANSP 1368 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis var. faluta Ahlstrom, 1943 		 females6 
ANSP 1369 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis hispida (Lauterborn, 1898) 		?females6 
ANSP 1370 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis connectens (Lauterborn, 1900) 		 females6 
ANSP 1377 Keratella cochlearis (Gosse, 1851)
Orig.Id.: 		 females3 
ANSP 1378 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella robusta ? (Lauterborn, 1900) 		?female1 
USNM 19883 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella stipidata (Ehrenberg, 1838) 		 females3 
ANSP 1379 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella robusta (Lauterborn, 1900) 		 females6 
ANSP 1380 Keratella cochlearis (Gosse, 1851)
Orig.Id.: 		 female1 
ANSP 1389 Keratella cochlearis (Gosse, 1851)
Orig.Id.: 		 females2 
ANSP 1390 Keratella cochlearis (Gosse, 1851)
Orig.Id.: 		 females3 
USNM 53110 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis (Gosse, 1851) 		 females30 
USNM 53112 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis robusta (Lauterborn, 1900) 		 females11 
USNM 39805 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis (Gosse, 1851) 		 females9 
USNM 39806 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis recurvispina (Jägerskiöld, 1894) 		 female1 
USNM 51955 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis micracantha (Lauterborn, 1898) 		 females8 
AMNH 1194 Keratella cochlearis (Gosse, 1851)
Orig.Id.: Keratella cochlearis var. faluta Ahlstrom, 1943 		 female holotype
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Geographical Range:
Cosmopolitan, including Antarctic region.
Macrohabitat:
Bog pond; Impoundment, freshwater (alpine); Impoundment, freshwater (natural basin); Impoundment, freshwater (subalpine); Lake, freshwater; Lake, freshwater (alpine); Lake, freshwater (alpine, ultraoligotrophic); Lake, freshwater (artificial); Lake, freshwater (dystrophic); Lake, freshwater (dystrophic, montane); Lake, freshwater (eutrophic); Lake, freshwater (meromictic); Lake, freshwater (mesotrophic); Lake, freshwater (oligotrophic); Lake, freshwater (subalpine); Lake, freshwater (subalpine, eutrophic); Lake, freshwater (ultraoligotrophic); Pond, freshwater; Pond, freshwater (alpine pastureland); Pond, freshwater (alpine); Pond, freshwater (artificial); Pond, freshwater (dystrophic); Pond, freshwater (eutrophic); Pond, freshwater (fishpond); Pond, freshwater (hypertrophic); Pond, freshwater (mesotrophic); Pond, freshwater (pasture land); Pool, freshwater; Pool, freshwater (alpine pastureland); River, freshwater; Sea; Stream backwater, fresh; Stream, freshwater (mountain);
Microhabitat:
Macrophytes; Open water; Open water (littoral and offshore); Open water (littoral);
Temperature:
4.30°C to 30.00°C, avg=15.92°C, n=51 		Redox:
-115.00mV to -52.00mV, avg=-89.33mV, n=3
Oxygen:
3.05mg/l to 13.60mg/l, avg=8.93mg/l, n=42 		Conductivity:
8.00µs/cm to 1270.00µs/cm, avg=228.73µs/cm, n=48
Saturation:
28.00% to 177.00%, avg=105.05%, n=39 		TDS:
180.00mg/l to 458.00mg/l, avg=277.50mg/l, n=6
PH:
0.21 to 9.40, avg=7.18, n=49 		Salinity:
0.01ppt to 0.40ppt, avg=0.20ppt, n=7
Ecology summary:
Planktonic in all stagnant freshwaters from small pools to large lakes, also in potamoplankton, river estuaries, athalassic saline and coastal brackish waters; in permanent and temporary habitats; eurythermic, euryhaline, avoids hypertrophic and strongly acidic conditions (Jersabek & Bolortsetseg, 2010) [Ref.18457].
Food:
Unicellular nanoplankton (phytoflagellates, cholorococcales), detritus (bacteria).
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Afrotropis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Antarctis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Australis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Nearctis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
NearctisNA1 CanadianNorth AmericaCanadaOntarioOntario - n.o.s. -
NearctisNA1 CanadianNorth AmericaCanadaSaskatchewanDivision Nr. 10
NearctisNA3 Rocky MountainNorth AmericaUnited States of AmericaMontanaLake Co.
NearctisNA3 Rocky MountainNorth AmericaUnited States of AmericaUtahBox Elder Co.
NearctisNA4 AlleghanyNorth AmericaUnited States of AmericaMichiganPresque Isle Co.
NearctisNA4 AlleghanyNorth AmericaUnited States of AmericaPennsylvaniaBucks Co.
Neotropis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
NeotropisNT3 BrazilianCentral AmericaPanamaPanama - n.o.s. -Panama - n.o.s. -
Orientalis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Palaearctis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
PalaearctisP1 EuropeanEuropeAustriaKärntenBezirk Spittal a.d. Drau
PalaearctisP1 EuropeanEuropeAustriaKärntenKlagenfurt Stadt
PalaearctisP1 EuropeanEuropeAustriaNiederösterreichBezirk Baden
PalaearctisP1 EuropeanEuropeAustriaNiederösterreichBezirk Mödling
PalaearctisP1 EuropeanEuropeAustriaOberösterreichBezirk Braunau am Inn
PalaearctisP1 EuropeanEuropeAustriaOberösterreichBezirk Gmunden
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