He proposes the following tentative internal classification, with Shabo closest to Koman and Gumuz, and Songhai closest to Saharan, a relationship which had not previously been suggested:

Their classification proposed 3 distinct families and 82 genera for the living species of cone snails.

In 2005 researchers proposed a new classification of trigeminal neuralgia which described a type of trigeminal neuralgia where the pain was constant and burning.

Monotremes are conventionally treated as comprising a single order Monotremata, though a recent classification proposes to divide them into the orders Platypoda (the platypus along with its fossil relatives) and Tachyglossa (the echidnas, or spiny anteaters).

For example, the influential classification of Sanžeev (1953) proposed a "Mongolian language" consisting of just the three dialects Khalkha, Chakhar, and Ordos, with Buryat and Oirat judged to be independent languages.