Ellampus puncticollis Mocsáry 1887: 291. Lectotype ♀ (designated by Móczár 1964a: 435), Germany: Hanover (MNSB) (examined).
Omalus aeneus [nec (Fabricius, 1787)]: Johansson 2010: 118 [part.], Johansson 2011: 35.
Omalus puncticollis: Hallin 2012, Dyntaxa 2013.
Material examined. * Norway (total 12 exx.): TEI: Seljord, Heggenes; TEY: Kragerø, Jomfruland; Porsgrunn, Hellås; Porsgrunn, Prestemoen; Bamble, Langøya; VAY: Kristiansand, Nedre Timenes; VE: Larvik, Mølen; Horten, Løvøya; Tjøme, Kolabekk-kilen. Sweden (total 3 exx.): Sm: Vetlanda, Skirö; Karlstorp, Drags Udde; Upl: Ljusterö, Hummelmora.
Distribution. * Norway, Sweden —Westpalearctic (?): Europe, Asia Minor and North Africa (Linsenmaier 1959, 1968, 1999). The general distribution is poorly known, because many authors have considered O. puncticollis to be conspecific with O. aeneus.
Remarks. The status of this taxon has varied considerably in the literature. While some authors have considered it to be a valid species (e.g. Morgan 1984, Kunz 1994, Rosa 2006) others have classified it as a form of O. aeneus (e.g. Trautmann 1927, Linsenmaier 1959, 1997, Kimsey & Bohart 1991, Mingo 1994). Recent unpublished DNA COI barcode studies suggest that O. puncticollis significantly differs genetically from O. aeneus, and most likely should be classified as a distinct species. Morphological and ecological differences have not yet been studied in detail, but apparently O. puncticollis is characterized by large mesonotal punctures, relatively hairy mesonotum, and a deep posteromedian notch on the third tergite. So far, the occurrence of O. puncticollis has been confirmed from Norway and Sweden by DNA barcoding. The distribution of the species is still poorly known in the studied area.