Order Araneida Clerck, 1757 - spiders Suborder Araneae Clerck, 1757 - tailless spiders Infraorder Opisthothelae Pocock, 1892 - unsegmented spiders Microorder Mygalomorpha Pocock, 1892 - mygalomorphs see [unranked] Mygalomorphae Pocock, 1892 Family †Fossilcalcaridae Wunderlich, 2015 [monotypic] 1 Genus †Fossilcalcarus Wunderlich, 2020, orth. inval. [monotypic] see Genus Fossilcalcar Wunderlich, 2015