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Genus of mayflies
Caenis is a genus of
mayflies . They are very small in size, sometimes with a body of only an 1/8 of an inch (3.2 mm).
Caenis is one of the most abundant mayfly genera of the
Holarctic . Larvae can occur in high densities on the bottoms of shallow ponds and lakes up to an altitude of 1800 meters in the [Alps].
[1]
Densities of 700-1700 larvae per square meter have been reported for C. luctuosa and C. horaria on bottoms covered with organic detritus or decaying leaves. Densities on mineral sediments are an order of magnitude lower (4-330 animals per square meter).
[2]
The following are included in BioLib.cz :
[3]
Caenis abdita Malzacher, 2013
Caenis acutostilata Malzacher, 2021
Caenis aethiopica Navás, 1935
Caenis afrocaenoides Malzacher, 2021
Caenis alicae Malzacher, 1990
Caenis americani Srinivasan, Sivaruban, Barathy, Malzacher & Isack, 2021
Caenis amica Hagen, 1861
Caenis amurensis Kluge, 1986
Caenis anceps Traver, 1935
Caenis antelucana Malzacher, 1990
Caenis antoniae Malzacher, 1992
Caenis argentina Navás, 1915
Caenis argillosa Kang & Yang, 1994
Caenis arunachalami Srinivasan et al., 2023
Caenis arwini McCafferty & Davis, 2001
Caenis aspera Tong & Dudgeon, 2002
Caenis bajaensis Allen & Murvosh, 1983
Caenis basuto Demoulin, 1970
Caenis belfiorei Malzacher, 1986
Caenis bella Kang & Yang, 1994
Caenis berneri Kimmins, 1956
Caenis beskidensis Sowa, 1973
Caenis bicornis Tong & Dudgeon, 2002
Caenis binda Suter, Mynott & Webb, 2023
Caenis brevipes Kimmins, 1956
Caenis burmeisteri Malzacher, 1990
Caenis candelata Malzacher, 1986
Caenis candida Harper & Harper, 1981
Caenis capensis (Barnard, 1932)
Caenis carloi Thomas, Marie & Dia, 2000
Caenis catherinae Hofmann & Thomas, 1999
Caenis chamie Alba-Tercedor & Mosquera, 1999
Caenis cibaria Eaton, 1879
Caenis cigana Pereira & Da-Silva, 1990
Caenis cincta Demoulin, 1956
Caenis corana Thomas & Sartori, 1989
Caenis corbeti Malzacher, 1990
Caenis cornigera Kang & Yang, 1994
Caenis cornuta (Tshernova, 1952)
Caenis corpulenta Kang & Yang, 1994
Caenis cubensis Malzacher, Naranjo, González-Lazo & Kluge, 2007
Caenis cuniana Froehlich, 1969
Caenis dangi (Soldán, 1986)
Caenis demoulini van Bruggen, 1954
Caenis diminuta Walker, 1853
Caenis dominguezi Malzacher, 2001
Caenis douglasi Malzacher, 1993
Caenis duodecima Malzacher, 1990
Caenis edwardsi Kimmins, 1939
Caenis eglinensis Pescador & Richard, 2006
Caenis elouardi Malzacher, 1990
Caenis fasciata Navás, 1927
Caenis femina Hofmann & Sartori, 1999
Caenis fittkaui Malzacher, 1986
Caenis fregatula Malzacher, 2013
Caenis gattolliati Malzacher, 2010
Caenis ghibana Malzacher, 1990
Caenis gilbonensis Malzacher, 1992
Caenis gilliesi Malzacher, 1990
Caenis gonseri Malzacher, 2001
Caenis grafi Malzacher, 2021
Caenis granifera Kang & Yang, 1994
Caenis gretathunbergae Malzacher, 2021
Caenis hanleyi Suter, Mynott & Webb, 2023
Caenis helenae Malzacher, 2012
Caenis hilaris (Say, 1839)
Caenis hissari Kluge, 1985
Caenis hoggariensis Grandi, 1951
Caenis horaria (Linnaeus, 1758)
Caenis inflexa (Kopelke, 1981)
Caenis insularis Demoulin, 1969
Caenis jinjana Kimmins, 1956
Caenis jinjanoides Malzacher, 2011
Caenis johannae Malzacher, 1996
Caenis jungi Braasch, 1980
Caenis kaegies Srinivasan et al., 2023
Caenis karenae Malzacher, 2021
Caenis kimminsis Ali, 1967
Caenis kivuensis Demoulin, 1956
Caenis knowlesi Gillies & Knowles, 1990
Caenis kohli Malzacher, 2011
Caenis kopetdagi Kluge, 1985
Caenis kungu Eaton, 1879
Caenis lactea (Burmeister, 1839)
Caenis latipennis Banks, 1907
Caenis liebenauae Malzacher, 1990
Caenis longiforcipata Malzacher, 2021
Caenis lubrica Tong & Dudgeon, 2002
Caenis luctuosa (Burmeister, 1839)
Caenis ludicra Navás, 1924
Caenis ludovici Malzacher, 2021
Caenis macafferti Provonsha, 1990
Caenis macronyx Kluge, 1986
Caenis macrura Stephens, 1835
Caenis maculata (Tshernova, 1952)
Caenis maduraiensis Balasubramanian & Muthukatturaja, 2021
Caenis magnipilosa (Kopelke, 1981)
Caenis malzacheri Sartori & Gattolliat, 2008
Caenis marataoan Nascimento et al., 2022
Caenis margherita Malzacher, 1990
Caenis martae Belfiore, 1984
Caenis melanoleuca Zhou & Zheng, 2004
Caenis miliaria (Tshernova, 1952)
Caenis moe Hwang & Bae, 1999
Caenis montana Kang & Yang, 1994
Caenis nachoi Alba-Tercedor & Zamora Muñoz, 1993
Caenis namorona Malzacher, 1995
Caenis nasuta Malzacher, 2021
Caenis nausicaae Malzacher, 2010
Caenis nemoralis Navás, 1922
Caenis nervulosa Malzacher, 1990
Caenis nigricola Malzacher, 2011
Caenis nigropunctata Klapálek, 1905
Caenis nishinoae Malzacher, 1996
Caenis nitida Kang & Yang, 1994
Caenis noctivaga Malzacher, 1990
Caenis obtusostilata Malzacher, 2021
Caenis occulta Malzacher, 1990
Caenis octulusa Malzacher, 2012
Caenis oromo Malzacher, 2021
Caenis orthostilata Malzacher, 2011
Caenis pallida Malzacher, 1990
Caenis panamensis Malzacher, 2001
Caenis parabrevipes Malzacher, 1992
Caenis parisi Malzacher, 2012
Caenis parviforceps (Zhou, Gui & Su, 2000)
Caenis perpusilla Walker, 1853
Caenis pflugfelderi Malzacher, 1990
Caenis philippinensis (Ulmer, 1924)
Caenis picea Kimmins, 1947
Caenis piscina Kimmins, 1947
Caenis plaumanni Malzacher, 2001
Caenis pseudamica Malzacher, 1990
Caenis pseudorivulorum Keffermüller, 1960
Caenis punctata McDunnough, 1931
Caenis pusilla Navás, 1913
Caenis pustula Tiunova, 1999
Caenis pycnacantha Jia, Qin, Ju & Zhou, 2010
Caenis pygmaea Costa, 1888
Caenis quatipuruica Malzacher, 1986
Caenis reissi Malzacher, 1986
Caenis rivulorum Eaton, 1884
Caenis robusta Eaton, 1885
Caenis rugosa Malzacher, 1995
Caenis rutila Malzacher, 1995
Caenis scotti Ulmer, 1930
Caenis sebastiani Malzacher, 2013
Caenis sigillata Malzacher, 1985
Caenis sinensis Gui & Zhou, 1999
Caenis solida Malzacher, 2010
Caenis spinosa Malzacher, 1995
Caenis srinagari Traver, 1939
Caenis strugaensis Ikonomov, 1961
Caenis subota Malzacher, 2012
Caenis taratopo Molineri, 2009
Caenis tardata McDunnough, 1931
Caenis teipunensis Molineri, Grillet, Nieto, Domínguez & Guerrero, 2011
Caenis tenella (Navás, 1932)
Caenis tuba Hwang & Bae, 1999
Caenis ulmeriana Malzacher, 2015
Caenis unidigitata Malzacher, 2013
Caenis uruzu Molineri & Malzacher, 2007
Caenis valentinae Grandi, 1951
Caenis vanuatensis Malzacher & Staniczek, 2007
Caenis venkataramani Srinivasan et al., 2023
Caenis vermifera Malzacher, 2011
Caenis yangi Kang & Yang, 1996
Caenis youngi Roemhild, 1984
Imitations of this mayfly in hook sizes as small as # 28 are used for
fly-fishing .
[4] Tying fly imitations this small is difficult, hence the nickname "Anglers Curse."