Complex sentence: In 1906 a second distinct species of "Antechinomys" genus was described from specimens collected from an expedition to central Australia, classified as "Antechinomys spenceri" Consequently an extensive revision occurred as to whether a separate unique species of "Antechinomys" existed.
Split into simpler sentences: In 1906 a second distinct species of "Antechinomys" genus was described from specimens collected from an expedition to central Australia, classified as "Antechinomys spenceri". Consequently extensive revision occurred as to whether a separate unique species of "Antechinomys" existed.