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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
 
Koste, W (1976): Osnabrücker naturwissenschaftliche Mitteilungen 4
Koste, W (1976): Osnabrücker naturwissenschaftliche Mitteilungen 4
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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 descending)
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Zsuga, K, 2014 Joint Danube Survey 3  
Yu, J;Z Wen;B Han;Q Lin, 2017 Acta hydrobiologica Sinica41 
Wulfert, K, 1956 Archiv für Hydrobiologie51 
Wierzejski, A, 1893 Rozprawy Akademii Umiejętności w Krakowie, Wydział Matematyczno-Przyrodniczy6 
Tausz, C E;J R Beaver;T R Renicker;J A Klepach;A I Pollard;R M Mitchell, 2019 Zootaxa4624 
Skorikov, A, 1896 Travaux de la Société des Naturalistes de Charkow30 
Sharma, B K;S Sharma, 2012 Acta Zoologica Academiae Scientiarum Hungaricae58 
Sanoamuang, L, 1992 The ecology of mountain lake rotifers in Canterbury, with particular reference to Lake Grasmere and the genus Filinia Bory de St. Vincent.Doctor 
Pejler, B, 1957 Zoologiska Bidrag från Uppsala32 
Lauterborn, R, 1900 Verhandlungen des naturhistorisch-medizinischen Vereins zu Heidelberg6
Lauterborn, R, 1898 Zoologischer Anzeiger21
Kutikova, L A, 1970 Fauna SSSR104 
Koste, W;Y Zhuge, 1998 Osnabrücker naturwissenschaftliche Mitteilungen24 
Koste, W;W Tobias, 1990 Osnabrücker naturwissenschaftliche Mitteilungen16 
Koste, W;J Poltz, 1984 Osnabrücker naturwissenschaftliche Mitteilungen11 
Koste, W, 1976 Osnabrücker naturwissenschaftliche Mitteilungen4 
Kakkassery, F K, 2003 Department of ZoologyDoctor 
Jersabek, C D;H Segers;B J Dingmann, 2003 The Academy of Natural Sciences of Philadelphia, Special Publications20Keratella tecta (Gosse, 1851)
Jersabek, C D;E Bolortsetseg, 2010 Proceedings of the Academy of Natural Sciences of Philadelphia159Keratella tecta (Gosse, 1851)
Hudson, C T;P H Gosse, 1886 The Rotifera; or wheel-animalcules, both British and foreign.I+II 
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Taxon
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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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USNM 98167 Keratella tecta (Gosse, 1851)
Orig.Id.: Keratella tecta (Gosse, 1851) 		 female1 
ANSP 1367 Keratella tecta (Gosse, 1851)
Orig.Id.: Keratella cochlearis var. tecta (Gosse, 1851) 		 females8 
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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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Palaearctis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
PalaearctisP1 EuropeanEuropeAustriaSteiermarkBezirk Liezen
PalaearctisP1 EuropeanEuropeAustriaNiederösterreichBezirk Mödling
PalaearctisP1 EuropeanEuropeAustriaSteiermarkBezirk Radkersburg
PalaearctisP1 EuropeanEuropeAustriaOberösterreichBezirk Vöcklabruck
PalaearctisP1 EuropeanEuropeAustriaSalzburgFlachgau
PalaearctisP1 EuropeanEuropeGermanyBayernOberfranken
PalaearctisP1 EuropeanEuropeAustriaSalzburgPinzgau
PalaearctisP1 EuropeanEuropeAustriaSalzburgPongau
PalaearctisP1 EuropeanEuropeAustriaSalzburgStadt Salzburg
PalaearctisP1 EuropeanEuropeAustriaSalzburgTennengau
PalaearctisP2 SiberianAsiaMongoliaHovdBuyant soum
PalaearctisP2 SiberianAsiaMongoliaArhangaiÖgiynuur soum
PalaearctisP4 ManchurianAsiaChinaHunanHunan - n.o.s. -
Orientalis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Neotropis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
Nearctis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
NearctisNA4 AlleghanyNorth AmericaUnited States of AmericaPennsylvaniaNorthampton Co.
Australis- n.s. -- n.s. -- n.s. -- n.s. -- n.s. -
AustralisA1 AustralianAustraliaAustraliaSouth AustraliaSouth Australia - n.o.s. -
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