Melolonthinae

Smetana, Aleš & Smith, Andrew B. T., 2006, Type species designations and other nomenclatural notes on Palaearctic Melolonthinae and Cetoniinae (Coleoptera: Scarabaeoidea: Scarabaeidae), Zootaxa 1220 (1), pp. 47-53 : 51

Melolonthinae : Rhizotrogini

Microtrogus . Mikšić (1965: 46) attempted to establish Microtrogus as a new subgenus of the genus Miltotrogus Reitter, 1902 . He included in it Melolontha pilicollis Gyllenhal, 1817 and Rhizotrogus fallax Marseul, 1879 , without designating the type species. Since no type species was designated in the original publication, this name is unavailable and must not be used.

Paramonotropus. Medvedev (1951: 499) attempted to establish the genus Paramonotropus for two species: Monotropus staudingeri Schaufuss, 1861 and Rhizotrogus laticollis Pérez­Arcas, 1874 , without designating the type species. Since no type species was designated in the original publication, this name is unavailable and must not be used. The species that Medvedev considered to be in Paramonotropus were subsequently placed in the genus Monotropus Erichson, 1848 .