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 : 50-51

Melolonthinae : Rhizotrogini

Pseudosymmachia Dalla Torre, 1913 . Fairmaire (1887a: 107) established the new genus Metabolus for Metabolus tumidifrons Fairmaire, 1887 , which is the type species of Metabolus by monotypy. Later in the same year, Fairmaire (1887b: 316) included another species; Metabolus impressifrons Fairmaire, 1887 ; in the genus. Metabolus Fairmaire is a junior homonym of Metabolus Bonaparte, 1854 (Aves) . Paulsen and Smith (2003: 254) established Ablotemus as a replacement name for Metabolus Fairmaire.

Brenske (1892: 151) established the genus Symmachia for Symmachia chinensis

Brenske, 1892, which is the type species of Symmachia by monotypy. Symmachia is a junior homonym of Symmachia Hübner, 1819 and Symmachia Sodovsky, 1837 (both Lepidoptera ). Dalla Torre (1913: 224) replaced Symmachia Brenske, 1892 with Pseudosymmachia , with Symmachia chinensis Brenske, 1892 automatically becoming the type species. Moser (1915: 148) synonymized Symmachia chinensis with Metabolus impressifrons .

Since Pseudosymmachia impressifrons and P. tumidifrons are considered to be cogeneric, Pseudosymmachia is the valid name of the genus with Metabolus Fairmaire, 1887 , Symmachia Brenske, 1892 , and Ablotemus Paulsen & Smith, 2003 as invalid synonyms.