Caenis (mayfly) explained

Caenis is a genus of mayflies. They are very small in size, sometimes with a body of only an 1/8 of an inch (0.125inches).

Distribution and ecology

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]

Species

The following are included in BioLib.cz:[3]

  1. Caenis abdita
  2. Caenis acutostilata
  3. Caenis aethiopica
  4. Caenis afrocaenoides
  5. Caenis alicae
  6. Caenis americani
  7. Caenis amica
  8. Caenis amurensis
  9. Caenis anceps
  10. Caenis antelucana
  11. Caenis antoniae
  12. Caenis argentina
  13. Caenis argillosa
  14. Caenis arunachalami
  15. Caenis arwini
  16. Caenis aspera
  17. Caenis bajaensis
  18. Caenis basuto
  19. Caenis belfiorei
  20. Caenis bella
  21. Caenis berneri
  22. Caenis beskidensis
  23. Caenis bicornis
  24. Caenis binda
  25. Caenis brevipes
  26. Caenis burmeisteri
  27. Caenis candelata
  28. Caenis candida
  29. Caenis capensis
  30. Caenis carloi
  31. Caenis catherinae
  32. Caenis chamie
  33. Caenis cibaria
  34. Caenis cigana
  35. Caenis cincta
  36. Caenis corana
  37. Caenis corbeti
  38. Caenis cornigera
  39. Caenis cornuta
  40. Caenis corpulenta
  41. Caenis cubensis
  42. Caenis cuniana
  43. Caenis dangi
  44. Caenis demoulini
  45. Caenis diminuta
  46. Caenis dominguezi
  47. Caenis douglasi
  48. Caenis duodecima
  49. Caenis edwardsi
  50. Caenis eglinensis
  51. Caenis elouardi
  52. Caenis fasciata
  53. Caenis femina
  54. Caenis fittkaui
  55. Caenis fregatula
  56. Caenis gattolliati
  57. Caenis ghibana
  58. Caenis gilbonensis
  59. Caenis gilliesi
  60. Caenis gonseri
  61. Caenis grafi
  62. Caenis granifera
  63. Caenis gretathunbergae
  64. Caenis hanleyi
  65. Caenis helenae
  66. Caenis hilaris
  67. Caenis hissari
  68. Caenis hoggariensis
  69. Caenis horaria
  70. Caenis inflexa
  71. Caenis insularis
  72. Caenis jinjana
  73. Caenis jinjanoides
  74. Caenis johannae
  75. Caenis jungi
  76. Caenis kaegies
  77. Caenis karenae
  78. Caenis kimminsis
  79. Caenis kivuensis
  80. Caenis knowlesi
  81. Caenis kohli
  82. Caenis kopetdagi
  83. Caenis kungu
  84. Caenis lactea
  85. Caenis latipennis
  86. Caenis liebenauae
  87. Caenis longiforcipata
  88. Caenis lubrica
  89. Caenis luctuosa
  90. Caenis ludicra
  91. Caenis ludovici
  92. Caenis macafferti
  93. Caenis macronyx
  94. Caenis macrura
  95. Caenis maculata
  96. Caenis maduraiensis
  97. Caenis magnipilosa
  98. Caenis malzacheri
  99. Caenis marataoan
  100. Caenis margherita
  101. Caenis martae
  102. Caenis melanoleuca
  103. Caenis miliaria
  104. Caenis moe
  105. Caenis montana
  106. Caenis nachoi
  107. Caenis namorona
  108. Caenis nasuta
  109. Caenis nausicaae
  110. Caenis nemoralis
  111. Caenis nervulosa
  112. Caenis nigricola
  113. Caenis nigropunctata
  114. Caenis nishinoae
  115. Caenis nitida
  116. Caenis noctivaga
  117. Caenis obtusostilata
  118. Caenis occulta
  119. Caenis octulusa
  120. Caenis oromo
  121. Caenis orthostilata
  122. Caenis pallida
  123. Caenis panamensis
  124. Caenis parabrevipes
  125. Caenis parisi
  126. Caenis parviforceps
  127. Caenis perpusilla
  128. Caenis pflugfelderi
  129. Caenis philippinensis
  130. Caenis picea
  131. Caenis piscina
  132. Caenis plaumanni
  133. Caenis pseudamica
  134. Caenis pseudorivulorum
  135. Caenis punctata
  136. Caenis pusilla
  137. Caenis pustula
  138. Caenis pycnacantha
  139. Caenis pygmaea
  140. Caenis quatipuruica
  141. Caenis reissi
  142. Caenis rivulorum
  143. Caenis robusta
  144. Caenis rugosa
  145. Caenis rutila
  146. Caenis scotti
  147. Caenis sebastiani
  148. Caenis sigillata
  149. Caenis sinensis
  150. Caenis solida
  151. Caenis spinosa
  152. Caenis srinagari
  153. Caenis strugaensis
  154. Caenis subota
  155. Caenis taratopo
  156. Caenis tardata
  157. Caenis teipunensis
  158. Caenis tenella
  159. Caenis tuba
  160. Caenis ulmeriana
  161. Caenis unidigitata
  162. Caenis uruzu
  163. Caenis valentinae
  164. Caenis vanuatensis
  165. Caenis venkataramani
  166. Caenis vermifera
  167. Caenis yangi
  168. Caenis youngi

Varia

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."

Notes and References

  1. Menetrey . N . B Oertli . M Sartori . A Wagner . JB Lachavanne . Eutrophication: are mayflies (Ephemeroptera) good bioindicators for ponds? . Hydrobiologia . 597 . 1 . 125–135 . 2008 . 10.1007/s10750-007-9223-x.
  2. Int Panis . L . Bervoets L . Verheyen RF . The spatial distribution of Caenis horaria (L., 1758)(Caenidae, Ephemeroptera) in a pond in Niel (Belgium) . Bull. Ann. Soc. R. Ent. Belg. . 131 . 47–51 . 1995 .
  3. https://www.biolib.cz/en/taxon/id25417/ BioLib.cz: genus Caenis Stephens, 1835
  4. Web site: Mayfly Genus Caenis (Angler's Curses). Jason Neuswanger. Troutnut.com. 30 December 2014.

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