Anitua initially studied singing in her native city, moving afterward to Mexico City, and later to Rome. She debuted at Teatro Nazionale in Rome in 1910, singing the role of Orfeo from the eponymous Christoph Willibald Gluck opera. She often sang at Teatro alla Scala in Milan, especially in Sigfried (1910-11 season), Etra in the first edition of Ildebrando Pizzetti's Fedra (1914-15 season), Konciakovna in Borodin's Prince Igor (1915-16 season), and besides Gluck's Orfeo, Giuseppe Verdi's Il Trovatore and Un Ballo in Maschera (1923-26 seasons). She sang in other important Italian theaters, including Teatro Rossini in Pesaro and Teatro Regio in Parma, performing Il barbiere di Siviglia (1916) and La Cenerentola (1920), and very often in South American theaters such as Teatro Colon in Buenos Aires, especially as Olga in Tchaikovsky's Eugene Onegin (1911) and as Amneris Verdi's Aida (1939). She has been considered one of the last true contraltos in the history of modern singing with low notes, wide and deep, with a sonorous and extended voice and with a solid technique that allowed her to perform Rossini despite the limited knowledge of coloratura at that time. One of her many students was the tenor Josռ Sosa Esquivel. Anitքa did not release many recordings, but there is a full edition of Carmen and a few opera pieces edited by Columbia.
Chronology of some appearances
Columbia, Milano 1911?
Trovatore (Verdi): Stride la vampa C2276 M11119
Columbia, Milano 1912?
Aida (Verdi): Gia i sacerdoti adunansi…Misero appien mi festi with Egidio Cunego D5572
Columbia, Milano 1914?
Complete Carmen (Bizet) with Luigi Bolis, Cesare Formichi and Ines Maria Ferraris