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Xavier_Carp has attached this picture to aid in identification. The message is below.
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Xavier_CarpAugust 7th, 2007, 3:25 pm
Posts: 13Hi, I know it is a mayfly, but don't know the species, hope you can help me out, it was photographed down here in Mexico.

KonchuAugust 7th, 2007, 5:54 pm
Site Editor

Posts: 505
Looks similar to the genus Tricorythodes (what people call Tricos) or some other member of the family Leptohyphidae. The dark color, three tails and shape & coloration of wings all help me to guess that it is Tricorythodes.

How big was it? What part of Mexico were you in when you saw it?
Xavier_CarpAugust 8th, 2007, 7:25 am
Posts: 13It is small maybe 1.4 cm I saw it in the central part of mexico, the place is about 2000 mt above the sea level, it was a beautiful shinny black color
KonchuAugust 8th, 2007, 8:55 pm
Site Editor

Posts: 505
Several Tricorythodes species are known from central Mexico.

Did you see the river or stream nearby? If so, please describe it. This might help.
Xavier_CarpAugust 9th, 2007, 1:41 pm
Posts: 13Konchu, I was fishing on this small creek, the area where I caught it is where the water is most still avobe a small dam, the creek is only 6ft wide and not very deep, the deepest pools are about 4ft and average depth is 2ft bottom is mostly grtavel with some areas covered with a thin layer of silt, hope this help

KonchuAugust 9th, 2007, 2:30 pm
Site Editor

Posts: 505
Good leptohyphid habitat.
TaxonAugust 9th, 2007, 3:55 pm
Site Editor
Royse City, TX

Posts: 1348

When you say Central Mexico, are you referring to the country or the state of México? This information would allow me to significantly narrow down the identification possibilities.

Here is a list of the Mexican states:

    SW Southwest Region
  • BN Baja California
  • BS Baja California Sur
  • CA Coahuila
  • CH Chihuahua
  • DU Durango (all but southern tip)
  • NL Nuevo León
  • SI Sinaloa (all but southern third)
  • SL San Luis Potosí (northern tip)
  • SO Sonora
  • TM Tamaulipas (all but southern third)
  • ZA Zacatecas (all but southern tip)
  • FS Far South Region
  • AG Aguascalientes
  • CL Colima
  • CM Campeche
  • CP Chiapas
  • DF Distrito Federal
  • DU Durango (southern tip)
  • GJ Guanajuato
  • GR Guerrero
  • HI Hidalgo
  • JA Jalisco
  • MC Michoacán
  • MR Morelos
  • MX México
  • NA Nayarit
  • OA Oaxaca
  • PU Puebla
  • QE Querétaro
  • QR Quintana Roo
  • SI Sinaloa (southern third)
  • SL San Luis Potosí (all but northern tip)
  • TB Tabasco
  • TL Tlaxcala
  • TM Tamaulipas (southern third)
  • VE Veracruz
  • YU Yucatán
  • ZA Zacatecas (southern tip)
Best regards,
Roger Rohrbeck
Xavier_CarpAugust 9th, 2007, 4:46 pm
Posts: 13Taxon, it was pictured in Puebla
TaxonAugust 9th, 2007, 5:55 pm
Site Editor
Royse City, TX

Posts: 1348
Hmmmm. Puebla, doesn’t seem have any leptohyphids recorded, at least according to a list compiled from Dr. Pat Randolph’s PhD dissertation. So, I looked at the surrounding states, and found that Oaxaca, immediately south of Puebla, has records of the following leptohyphids:

    Leptohyphes alleni
    Leptohyphes brunneus
    Leptohyphes castaneus
    Leptohyphes zalope
    Tricorythodes notatus
    Vacupernius packeri

It is likely one of these. Perhaps Konchu will be able to narrow it further.
Best regards,
Roger Rohrbeck
KonchuAugust 10th, 2007, 9:01 am
Site Editor

Posts: 505
The tails on this beast are too long for Tricorythodes...

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