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Holmiidae
Holmiidae is a family of trilobites, that lived during the Lower Cambrian (Atdabanian). The Holmiidae is a diverse family of eight genera containing at least 17 species. It includes some of the earliest trilobites of Baltica. Holmiidae occur throughout Baltica (Scandinavia and the eastern seaboard of the Baltic Sea) and Western Laurentia (in the Great Basin of the USA and northwestern Canada), and also in Morocco.〔
== Taxonomy ==
Hupé (1953) defined the Holmiidae as a subfamily (Holmiinae) within the Olenellidae containing ''Holmia'', ''Kjerulfia'' and ''Bondonella''. Harrington et al. (1959) excluded ''Kjerulfia'', while assigning ''Schmidtiellus'' to it. Bergström (1973) included ''Holmia'', ''Elliptocephala'', ''Esmeraldina'', ''Schmidtiellus'' and ''Wanneria''.
Repina (1979) assigned ''Holmia'', ''Schmidtiellus'', ''Kjerulfia'', ''Elliptocephala'',
''Bondonella'', ''Andalusiana'' and ''Holmiella'' to the Holmiinae, that together with the monotypic Callaviinae comprised the Holmiidae. Palmer and Repina (1993) added ''Holmiella'' but excluded ''Kjerulfia'', they assigned to the Callaviinae. Lieberman, who made cladistic analyses of the Olenellina and the included superfamilies, regards ''Andalusiana'' an advanced "Nevadioidea", ''Callavia'' and ''Bondonella'' as Judomioidea, and ''Elliptocephala'' and ''Wanneria'' stemgroup genera closely related to the common ancestor of the Holmiidae and the Biceratopsidae.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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