Euselasia is a genus in the butterfly family Riodinidae present only in the Neotropical ecozone.
The wing veins are inconstant. Some species have two, others three, and one species (E. aurantiaca ) even four subcostal branches. The genus is recognizable by the anterior radial vein either running directly in the elongation of the subcostal, or being connected with it by a very short anterior discocellular.
The butterflies often have the appearance of small Satyrids or Thecla species; as for instance Euselasia eutychus resembles (particularly beneath) exactly Euptychia helle flying in the same locality, or Thecla themathea ; or Euselasia clithra resembles Euptychia chloris and so on. On the upper surface there is often a very bright reflection of a shining power otherwise not found in any lepidopteran and of a truly wonderful iridescence.
The larvae are somewhat of the shape of a woodlouse , very brightly coloured, behind the head there are two points. The pupae are covered with fine, fluffy hairs like the larvae, green, held by a belt. The imagines are partly extraordinarily rare and belong to the few Riodinidae that fly to a considerable height. They also clap their wings together when at rest like other day butterflies, unlike most of the other Riodinidae which spread them out like the Geometridae.
This is one of the largest genera in the family Riodinidae. As of 2004 there were almost 170 species and more are being described continually. The type species of the genus is Euselasia gelon (Stoll , [1787])
Species include:
Euselasia albomaculiga Callaghan, 1999 present in Colombia Euselasia alcmena (Druce, 1878) present in Ecuador Euselasia amblypodia Lathy, 1926 present in Peru Euselasia amphidecta (Godman & Salvin, 1878) present in Costa Rica and Panama Euselasia andreae Hall, Willmott & Busby, 1998 present in EcuadorEuselasia angulata (Bates, 1868) present in Mexico, Costa Rica, Brazil and ColombiaEuselasia anica (Herrich-Schäffer, [1853]) present in Suriname Euselasia arbas (Stoll, 1781) present in French Guiana , Guyana , Suriname and ColombiaEuselasia archelaus Seitz, 1916 present in Ecuador and Bolivia Euselasia argentea (Hewitson, 1871) present in Mexico, Nicaragua , Bolivia and ColombiaEuselasia artos (Herrich-Schäffer, [1853]) present in SurinameEuselasia athena (Hewitson, 1869) present in EcuadorEuselasia attrita Seitz, 1916 present in BoliviaEuselasia aurantia (Butler & Druce, 1872) present in Panama, Costa Rica and ColombiaEuselasia aurantiaca (Salvin & Godman, 1868) present in Panama, Costa Rica, Nicaragua, Venezuela and ColombiaEuselasia authe (Godman, 1903) present in Brazil and PeruEuselasia baucis Stichel, 1919 present in Colombia and PeruEuselasia bettina (Hewitson, 1869) present in Costa Rica, Nicaragua and EcuadorEuselasia bilineata Lathy, 1926 present in French GuianaEuselasia brevicauda Lathy, 1926 present in BoliviaEuselasia cafusa (Bates, 1868) present in French Guiana, Guyana, Suriname, Trinidad and Tobago , Ecuador and BrazilEuselasia calligramma (Bates, 1868) present in BrazilEuselasia candaria (Druce, 1904) present in ColombiaEuselasia cataleuca (R. Felder, 1869) present in MexicoEuselasia catoleuce (Hübner , 1823) Euselasia charilis (Bates, 1868) present in Colombia and BrazilEuselasia chinguala Hall & Willmott, 1995 present in EcuadorEuselasia chrysippe (Bates, 1866) present in Guatemala , Nicaragua, Costa Rica, Panama, and ColombiaEuselasia clesa (Hewitson, 1856) present in BrazilEuselasia clithra (Bates, 1868) present in BrazilEuselasia corduena (Hewitson, 1874) present in Panama, Costa Rica, Bolivia, Peru and ColombiaEuselasia crinon Stichel, 1919 present in Bolivia and PeruEuselasia cucuta (Schaus, 1902) present in VenezuelaEuselasia cuprea Lathy, 1926 present in French GuianaEuselasia cyanira Callaghan, 1997 present in PeruEuselasia cyanofusa Hall & Willmott, 1998 present in Ecuador and PeruEuselasia dolichos Staudinger, [1887] Euselasia dorina (Hewitson, 1860) present in Brazil.Euselasia fervida (Butler, 1874) present in Venezuela, Colombia and BrazilEuselasia eberti Callaghan, 1999 present in BrazilEuselasia effima (Hewitson, 1869) present in EcuadorEuselasia ella Seitz, 1916) present in Bolivia, Colombia and BrazilEuselasia erilis Stichel, 1919 present in BrazilEuselasia ethemon (Cramer, 1776) Euselasia euboea (Hewitson, [1853]) present in French Guiana, Guyana, Suriname, Venezuela, Bolivia and BrazilEuselasia eubule (R. Felder, 1869) present in Mexico, Costa Rica and PanamaEuselasia eucerus (Hewitson, 1872) present in BrazilEuselasia eucrates (Hewitson, 1872) present in Panama, Costa Rica, Ecuador, Venezuela and ColombiaEuselasia eucritus (Hewitson, [1853]) present in Bolivia and BrazilEuselasia eugeon (Hewitson, 1856) - Eugeon sombermark - present in Brazil, Bolivia and Argentina Euselasia euhemerus (Hewitson, 1856) present in BrazilEuselasia eulione (Hewitson, 1856) present in BrazilEuselasia eumedia (Hewitson, [1853]) present in Suriname and BrazilEuselasia eumenes (Hewitson, [1853]) present in BrazilEuselasia eumithres Stichel, 1919 present in BrazilEuselasia eunaeus (Hewitson, [1855]) BrazilEuselasia euodias (Hewitson, 1856) present in French Guiana and BrazilEuselasia euoras (Hewitson, [1855]) present in French Guiana, Bolivia, Ecuador, Brazil and PeruEuselasia eupatra Seitz, 1916 present in ColombiaEuselasia euphaes (Hewitson, [1855]) present in Brazil and PeruEuselasia euploea (Hewitson, [1855]) present in BrazilEuselasia euriteus (Cramer, 1777) present in Suriname and BrazilEuselasia euromus (Hewitson, 1856) present in BrazilEuselasia eurymachus (Hewitson, 1872) present in EcuadorEuselasia euryone (Hewitson, 1856) present in French Guiana, Guyana, Suriname, Ecuador, Brazil, Peru and BoliviaEuselasia eurypus (Hewitson, 1856) present in BrazilEuselasia erythraea (Bates, 1868) present in Colombia and BrazilEuselasia eusepus (Hewitson, [1853]) present in Mexico and BrazilEuselasia eutaea (Hewitson, [1853]) present in Suriname and BrazilEuselasia eustola Stichel, 1919 present in French Guiana, Peru and BoliviaEuselasia eutychus (Hewitson, 1856) present in Guyana, Colombia and BrazilEuselasia extensa Bates, 1968 present in BrazilEuselasia fabia (Godman, 1903) present in Ecuador and PeruEuselasia fournierae Lathy, 1924 present in BrazilEuselasia gelanor (Stoll, 1780) present in French Guiana, Suriname and BoliviaEuselasia gelon (Stoll, [1787]) present in Suriname and BoliviaEuselasia geon Seitz, 1913 present in Brazil, Bolivia and ArgentinaEuselasia gordios Stichel, 1919 present in BoliviaEuselasia gradata Stichel, 1927 present in VenezuelaEuselasia gyda (Hewitson, 1860) present in Panama, Costa Rica, Colombia, Brazil and BoliviaEuselasia hahneli Staudinger, [1887] present in PeruEuselasia hieronymi (Salvin & Godman, 1868) present in Mexico, Panama, Costa Rica, Guatemala, Nicaragua and EcuadorEuselasia hygenius (Stoll, 1787) present in Suriname and BrazilEuselasia hypophaea (Godman & Salvin, 1878) present in PanamaEuselasia ignitus Stichel, 1924 present in French Guiana and BrazilEuselasia illarina Hall & Willmott, 1998 present in EcuadorEuselasia inconspicua (Godman & Salvin, 1878) present in Panama and ColombiaEuselasia inini Brévignon, 1996 present in French GuianaEuselasia issoria (Hewitson, 1869) present in EcuadorEuselasia janigena Stichel, 1919 present in PeruEuselasia jigginsi Hall & Willmott, 1998 present in EcuadorEuselasia jocotoco Euselasia julia (Druce, 1878) present in BrazilEuselasia kartopus Stichel, 1919 present in French Guiana, Bolivia and PeruEuselasia labdacus (Stoll, 1780) present in Suriname, Panama, Costa Rica, Venezuela and ColombiaEuselasia leucon (Schaus, 1913) present in Panama and Costa RicaEuselasia leucophryna (Schaus, 1913) present in Costa RicaEuselasia lisias (Cramer, [1777]) present in French Guiana, Guyana, Suriname and ColombiaEuselasia lycaeus Staudinger, 1888 present in BrazilEuselasia lysimachus Staudinger, 1888 present in BrazilEuselasia manoa Brévignon, 1996 present in French GuianaEuselasia mapatayana Hall & Willmott, 1998 present in Ecuador and ColombiaEuselasia matuta (Schaus, 1913) present in Costa RicaEuselasia mazaca (Hewitson, 1860) present in BrazilEuselasia melaphaea (Hübner, 1823) present in Suriname, Bolivia and BrazilEuselasia micaela (Schaus, 1902) present in PeruEuselasia midas (Fabricius, 1775) present in Panama, Costa Rica, French Guiana, Guyana, Suriname, Colombia, Bolivia and PeruEuselasia mirania (Bates, 1868) present in BrazilEuselasia modesta (Bates, 1868) present in Brazil and ArgentinaEuselasia murina Stichel, 1925 present in BrazilEuselasia mutator Seitz, 1916 present in PeruEuselasia mys (Herrich-Schäffer, [1853]) present in Suriname and BrazilEuselasia mystica (Schaus, 1913) present in Costa RicaEuselasia nauca Hall & Willmott, 1998 present in EcuadorEuselasia nytua Euselasia oaxacensis Euselasia onorata (Hewitson, 1869) present in Ecuador, Costa Rica and ColombiaEuselasia opalescens (Hewitson, [1855]) present in French Guiana, Bolivia, Ecuador, Brazil and PeruEuselasia opalina (Westwood, 1851) present in BrazilEuselasia opimia Stichel, 1919 present in BoliviaEuselasia orba Stichel, 1919 present in BrazilEuselasia orion Le Cerf, 1958 present in ColombiaEuselasia orfita (Cramer, 1777) present in French Guiana, Guyana, Suriname, Ecuador, Bolivia and BrazilEuselasia palla Hall & Willmott, 1998 present in EcuadorEuselasia pance Callaghan, 1999 present in ColombiaEuselasia parca Stichel, 1919 present in BrazilEuselasia pellonia Stichel, 1919 present in Brazil and PeruEuselasia pelor (Hewitson, [1853]) present in BrazilEuselasia pellos Stichel, 1919 present in BrazilEuselasia perisama Hall & Lamas, 2001 present in PeruEuselasia phedica (Boisduval, [1836]) present in French GuianaEuselasia phelina (Druce, 1878) present in French Guiana, Venezuela, Brazil and PeruEuselasia pillaca Hall & Willmott, 1998 present in EcuadorEuselasia portentosa Stichel, 1927 present in Costa RicaEuselasia praecipua Stichel, 1924 present in Brazil and French GuianaEuselasia praeclara (Hewitson, 1869) present in EcuadorEuselasia procula (Godman & Salvin, [1885]) present in Mexico, Panama and Costa RicaEuselasia pseudomys Callaghan, 1999 present in BrazilEuselasia pullata Stichel, 1927 present in BrazilEuselasia pusilla (R. Felder, 1869) present in MexicoEuselasia rasonea (Schaus, 1902) present in Venezuela and ColombiaEuselasia rava Stichel, 1928 present in PeruEuselasia regipennis (Butler & Druce, 1872) present in Mexico and ColombiaEuselasia rhodogyne (Godman, 1903) present in Panama, Costa Rica, Ecuador and ColombiaEuselasia rhodon Seitz, 1913 present in BrazilEuselasia rubrocilia Lathy, 1926 present in French GuianaEuselasia saulina Brévignon, 1996 present in French GuianaEuselasia scotinosa Stichel, 1930 present in French Guiana and BrazilEuselasia seitzi Lathy, 1926 present in PeruEuselasia serapis Stichel, 1919 present in BrazilEuselasia sergia (Godman & Salvin, [1885]) present in United States (east coast), Mexico, Panama, Guatemala and Costa RicaEuselasia subargentea (Lathy, 1904) present in Costa Rica and ColombiaEuselasia tarinta (Schaus, 1902) present in ColombiaEuselasia teleclus (Stoll, 1787) present in French Guiana, Suriname and EcuadorEuselasia thaumata Hall & Willmott, 1998 present in EcuadorEuselasia thucydides (Fabricius, 1793) present in BrazilEuselasia thusnelda Möschler, 1883 present in SurinameEuselasia toppini Sharpe, 1915 present in Colombia, Bolivia, Brazil and PeruEuselasia uria (Hewitson, [1853]) present in BrazilEuselasia urites (Hewitson, [1853]) present in French Guiana and BrazilEuselasia utica (Hewitson, [1855]) present in BrazilEuselasia uzita (Hewitson, [1853]) present in French Guiana, Guyana, Suriname and BrazilEuselasia venezolana Seitz, 1913 present in French Guiana, Venezuela and ColombiaEuselasia violacea Lathy, 1924 present in ColombiaEuselasia violetta (Bates, 1868) present in Brazil and French GuianaEuselasia waponaka Brévignon, 1996 present in French GuianaEuselasia zara (Westwood, 1851) present in BrazilEuselasia zena (Hewitson, 1860) present in French Guiana, Colombia, Brazil and Peru