Pterostichus amadeus Bousquet, new replacement name

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 512

Pterostichus amadeus Bousquet, new replacement name

Pterostichus vexatus Bousquet, 1985a: 253 [primary homonym of Pterostichus vexatus Broun, 1908]. Type locality: "Harvard [Latah County], Ida[ho]" (original citation). Holotype (♂) in CAS [# 15227].

Pterostichus amadeus Bousquet. New replacement name for Pterostichus vexatus Bousquet, 1985. Note. Pterostichus vexatus Bousquet, 1985 is a primary homonym of Pterostichus vexatus Broun, 1908, a valid species from New Zealand currently placed in the genus Holcaspis Chaudoir (Butcher 1984: 85; Larochelle and Larivière 2001: 98). The International Commission on Zoological Nomenclature (1999: 59) rules that the "junior name [of a primary homonym] is permanently invalid" (Article 57.2). However, the commission moderates this ruling in Article 23.9.5 which states that "when an author discovers that a species-group name in use is a junior primary homonym ... of another species-group name also in use, but the names apply to taxa not considered congeneric after 1899, the author must not automatically replace the junior homonym; the case should be referred to the Commission for a ruling under the plenary power and meanwhile prevailing usage of both names is to be maintained." Since Broun described his new species in 1908, both taxa described under the name Pterostichus vexatus were considered congeneric after 1899 and therefore the name Pterostichus vexatus Bousquet, 1985 must be changed.

Distribution.

This species is known from Latah and Idaho Counties (CNC) in northern Idaho and Mineral County in west-central Montana (James C. Bergdahl pers. comm. 2008).

Records.

USA: ID, MT