 plagiaulacida' is a group of extinct multituberculate mammals. multituberculates were among the most common mammals of the mesozoic, "the age of the dinosaurs". plagiaulacids, an informal suborder, are the most basal of this order, and ranged from the middle jurassic period to the lower cretaceous period of the northern hemisphere. kielan-jaworowska and hurum (2001) divides âplagiaulacidaâ into three informal lineages, the paulchoffatiids, the plagiaulicids, and the allodontids. == allodontid line == the allodontid line may be a superfamily, allodontoidea. both allodontids and paulchoffatiids (below) were among the most basal of the plagiaulacids. the allodontid line contains: the family allodontidae is known from two genera from the upper jurassic morrison formation of north america. the family zofiabaataridae contains a single genus, zofiabaatar and is also from the morrison formation. the affinities of a further morrison formation genus, glirodon, are unclear, but itâs also within the allodontid line. == paulchoffatiid line == the paulchoffatiid line may be a superfamily, paulchoffatioidea. some remains from the middle jurassic of england might belong within this group. representatives are best known from the upper jurassic, (especially from guimarota, portugal), though some were still extant during the lower cretaceous. the genera of the family paulchoffatiidae are divided into two of subfamilies, plus a couple of harder-to-place individuals: *subfamily paulchoffatiinae includes paulchoffatia and its relatives. this taxon contains nine genera. *subfamily kuehneodontinae consists solely of the genus kuehneodon, though there are half-a-dozen named species. other genera include galveodon and sunnyodon, both based on teeth from the lower cretaceous of spain and england respectively. also referable to the paulchoffatiid line, but not the family itself, are the following: *family hahnodontidae, which is restricted to a single lower tooth from the upper cretaceous of morocco, (hahnodon). *family pinheirodontidae is known from lower cretaceous teeth found in iberia and england. == plagiaulacid line (possibly superfamily plagiaulacoidea?) == family plagiaulacidae is known from the upper jurassic (north america) to lower cretaceous (europe and asia). plagiaulax, bolodon, ctenacodon' brentbaatar. 'ctenacodon requires renaming, while as of 2001 material from china has yet to be described. family albionbaataridae is known from the upper jurassic to lower cretaceous of 
Cretaceous_mammals Jurassic_mammals Multituberculates