ɐ sˈɛkənd spˈiːsiːz, ˈeɪ. zɪnˈoːɹəm, wʌz dᵻskɹˈaɪbd baɪ ˈɛm. ˈɛɹɪk ˈændɚsən ænd ɡˈɑːsztənˌɪi ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti wˈʌn, ˈɔːlsoʊ fɹʌm ˈɔf sˈʌðɚn ˌɑːɹdʒəntˈiːnə.
A second species, A. zinorum, was described by M. Eric Anderson and Gosztonyi in 1991, also from off southern Argentina.