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Species:
Keratella tecta (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 stipitata (Ehrenberg) after Carlin (1945, partim) [Ref.11450]
• Keratella tecta (Gosse) has mostly been regarded as an infrasubspecific variety of the polymorphic species K. cochlearis (Gosse) in the past (e.g., Ahlstrom, 1943 [Ref.16986]; Koste, 1978 [Ref.17338]), but as a distinct morphospecies by more recent authors (e.g., Koste & Shiel, 1987 [Ref.16986]). Accepting specific status may be justified by clear-cut ecological requirements of this Keratella, which is restricted to eu- to polytrophic lakes and ponds. The taxonomy of the genus, however, exclusively relies on lorica characteristics such as caudal spine length and fine structure of the dorsal lorica, which have been shown to vary in response to environmental conditions (Pejler, 1962 [Ref.11389]; Ruttner-Kolisko, 1972 [Ref.15310]; Gilbert & Stemberger, 1984 [Ref.16364]). The taxonomic relevance of criteria previously used for systematics and hence the rank of this taxon thus remains unclear. See also Donner (1978:177) [Ref.17191], Hofmann (1983) [Ref.11759], and Koste & Poltz (1984:113) [Ref.11772] for a discussion of the taxonomic status of K. tecta.
Nomenclatural status:
name in current use 		Species group name declinable:
yes 		Validity:
valid 		Taxon Rank:
Species 		Availability:
available
Original Combination:
Anuraea tecta 		Original Spelling:
Anuræa tecta 		Latest Revision:
Koste, W (1978): Rotatoria. Die Rädertiere Mitteleuropas. Ein Bestimmungswerk, begründet von Max Voigt. Überordnung Monogononta. 673, 234 pls.
Page last modified on: 20.07.2016 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 Russell Shiel, 30. May 2018
Image courtesy Russell Shiel, 30. May 2018
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Author(s)(sorted ascending)
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Ahlstrom, E H, 1943 Bulletin of the American Museum of Natural History80
Athibai, S;H Segers;L Sanoamuang, 2013 Journal of Limnology72 
Bartoš, E, 1946 Časopis Národního musea, oddíl přírodovědný115 
Bogoslovsky, A S, 1962 Zoologicheskij Zhurnal61 
Carlin, B, 1945 Medlemsblad för Biologilärarnas Förening1 
Chung, C E;H B Yoo;S Y Kim, 1992 The Korean Journal of Systematic Zoology8 
De Manuel, J, 1991 Verhandlungen der internationalen Vereinigung für Limnologie24 
De Manuel, J, 2000 Limnetica19 
Donner, J, 1972 Archiv für Hydrobiologie, Supplement44 
Donner, J, 1978 Archiv für Hydrobiologie, Supplement52 
Gosse, P H, 1851 The Annals and Magazine of Natural History(ser. 2) 8
Grothe, D W;D R Grothe, 1977 An illustrated key to the planktonic rotifers of the Laurentian Great Lakes.  
Hudson, C T;P H Gosse, 1886 The Rotifera; or wheel-animalcules, both British and foreign.I+II 
Jersabek, C D;E Bolortsetseg, 2010 Proceedings of the Academy of Natural Sciences of Philadelphia159Keratella tecta (Gosse, 1851)
Jersabek, C D;H Segers;B J Dingmann, 2003 The Academy of Natural Sciences of Philadelphia, Special Publications20Keratella tecta (Gosse, 1851)
Kakkassery, F K, 2003 Department of ZoologyDoctor 
Koste, W, 1976 Osnabrücker naturwissenschaftliche Mitteilungen4 
Koste, W;J Poltz, 1984 Osnabrücker naturwissenschaftliche Mitteilungen11 
Koste, W;W Tobias, 1990 Osnabrücker naturwissenschaftliche Mitteilungen16 
Koste, W;Y Zhuge, 1998 Osnabrücker naturwissenschaftliche Mitteilungen24 
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Keratella tecta f. maior (Lauterborn, 1900) no nomenclatural statusFormanot available
Keratella tecta f. punctata (Lauterborn, 1900) no nomenclatural statusFormanot available
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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
 
Autobahnsee Viehhausen
Open water / Pond, freshwater12.07.2012CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Bürmooser See
Open water / Pond, freshwater (eutrophic)15.08.2001CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Ebinger Badesee
Open water / Pond, freshwater (hypertrophic)20.07.2018CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Egelsee (Grosser)
Open water / Pond, freshwater (dystrophic)23.09.2015CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Egelsee (Mittlerer)
Open water / Pond, freshwater (dystrophic)25.09.2017CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Gasthager pond
Open water / Pond, freshwater18.08.1988CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Golfplatz Zell am See, Rohrkolbenteich am Golfplatz Zell am See
Open water / Pond, freshwater04.10.1986CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
cf.
Golfplatz Zell am See, Tümpel
Open water / Pond, freshwater04.10.1986CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Green Pond (Farmersville)
- / Pond, freshwater01.01.1941Collection / - / Specimen preparations2048
C
 
Har Us Nuur (A)
Open water (littoral) / Lake, freshwater19.08.2006Expedition, Literature / - / Published Information1
L
 
Hochkeil-Trail, bog pond
Open water / Pond, peat bog12.08.1988CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Kladensky, swimming pond
Open water / Pond, freshwater14.08.2001CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Leopoldskroner Weiher
Open water / Pond, freshwater08.07.2020CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Liuye Lake (southern part)
Open water / Lake, freshwater (eutrophic)12.03.2016CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Liuye Lake (Zhantian, northern part)
Open water / Lake, freshwater (eutrophic)17.09.2015CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Mayr Alm pond (Forstau)
Littoral microhabitats / Pond, freshwater (alpine pastureland)07.08.1986CJ unpubl. / - / Unpublished Information, own observations (CJ)1
F
 
Mondsee
Open water / Lake, freshwater01.06.2016CJ unpubl. / - / Unpublished Information, own observations (CJ)1
single encounter
F
 
Murray River, South Australia
- / -01.01.1900Collection / - / Specimen preparations2
Russell Shiel, in litt.
F
 
Ögiy Nuur (A)
Macrophytes (Ceratophyllum, Myriophyllum) / Lake, freshwater (mesotrophic)26.08.2005Expedition, Literature / - / Published Information2052
L
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ANSP 1367 Keratella tecta (Gosse, 1851)
Orig.Id.: Keratella cochlearis var. tecta (Gosse, 1851) 		 females8 
USNM 98167 Keratella tecta (Gosse, 1851)
Orig.Id.: Keratella tecta (Gosse, 1851) 		 female1 
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Geographical Range:
Cosmopolitan.
Macrohabitat:
Lake, freshwater; Lake, freshwater (artificial); Lake, freshwater (dystrophic, montane); Lake, freshwater (eutrophic); Lake, freshwater (mesotrophic); Lake, freshwater (subalpine, eutrophic); Pond, freshwater; Pond, freshwater (alpine pastureland); Pond, freshwater (artificial); Pond, freshwater (dystrophic); Pond, freshwater (eutrophic); Pond, freshwater (fishpond); Pond, freshwater (hypertrophic); Pond, peat bog; Pond, peat bog (alpine);
Microhabitat:
Littoral microhabitats; Macrophytes (Ceratophyllum, Myriophyllum); Open water; Open water (littoral); Open water (offshore);
Temperature:
9.00°C to 28.20°C, avg=18.99°C, n=18 		Redox:
-115.00mV to -52.00mV, avg=-94.00mV, n=3
Oxygen:
6.60mg/l to 13.60mg/l, avg=9.11mg/l, n=17 		Conductivity:
7.80µs/cm to 485.00µs/cm, avg=161.31µs/cm, n=17
Saturation:
72.00% to 177.00%, avg=119.31%, n=17 		TDS:
180.00mg/l to 205.00mg/l, avg=196.67mg/l, n=3
PH:
4.30 to 44.50, avg=8.88, n=19 		Salinity:
0.01ppt to 0.20ppt, avg=0.15ppt, n=4
Ecology summary:
Planktonic in freshwater lakes, ponds, and reservoirs; also in potamoplankton, river estuaries and coastal brackish waters; indicates eutrophic conditions; eurythermic (Jersabek & Bolortsetseg, 2010) [Ref.18457].
Food:
 
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Afrotropis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Australis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
AustralisA1 AustralianAustraliaAustraliaSouth AustraliaSouth Australia - n.o.s. -
Nearctis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
NearctisNA4 AlleghanyNorth AmericaUnited States of AmericaPennsylvaniaNorthampton Co.
Neotropis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Orientalis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Palaearctis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
PalaearctisP1 EuropeanEuropeAustriaNiederösterreichBezirk Mödling
PalaearctisP1 EuropeanEuropeAustriaOberösterreichBezirk Vöcklabruck
PalaearctisP1 EuropeanEuropeAustriaSalzburgFlachgau
PalaearctisP1 EuropeanEuropeAustriaSalzburgPinzgau
PalaearctisP1 EuropeanEuropeAustriaSalzburgPongau
PalaearctisP1 EuropeanEuropeAustriaSalzburgStadt Salzburg
PalaearctisP1 EuropeanEuropeAustriaSalzburgTennengau
PalaearctisP1 EuropeanEuropeAustriaSteiermarkBezirk Liezen
PalaearctisP1 EuropeanEuropeAustriaSteiermarkBezirk Radkersburg
PalaearctisP1 EuropeanEuropeGermanyBayernOberfranken
PalaearctisP2 SiberianAsiaMongoliaArhangaiÖgiynuur soum
PalaearctisP2 SiberianAsiaMongoliaHovdBuyant soum
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