In biology, a species is a kind of organism. ... by ernst Mayr, species are groups of ... 1 Definitions of species . 2 Importance...Punctuated equilibrium...uated equilibrium originated as an extension of ernst Mayr's concept of ... 4 ernst Mayr's understanding of punctuated equilibrium ...ational Evolution or Punctuated Equilibria . by ernst Mayr ... since shown that the term punctuated ...Neo