On <i>Callavia</i> (Trilobita) from the Cambrian Series 2 of Iberia with systematic status of the genus

Abstract Olenellid trilobites from the lower Cambrian of Iberian Peninsula are very scarce and poorly studied, making them difficult to compare with defined species include in biostratigraphic paleobiogeographic analyses. Based on newly collected specimens, we revise ‘ Callavia ? lotzei ’ Richter Richter, 1941 ‘Cumbres beds’ Cumbres de San Bartolomé ‘Herrerías shale’ Cañaveral León, Sierra del Bujo, Hinojales (Huelva, Spain), Paradoxides choffati Delgado, 1904 Vila Boim Formation Elvas (Portugal). The new material indicates that is a junior synonym P. .’ here assigned Matthew, 1897, for which morphological characters reassessed, offering valuable opportunity discuss previously misinterpreted this genus. Traditionally Olenelloidea Walcott, 1890, lacks some diagnostic superfamily Judomioidea Repina, 1979. A diagnosis genus provided, Sdzuyomia Lieberman, 2001 considered represent . distributed across western margin Gondwana, Mediterranean region (Iberia Morocco) throughout all Avalonia sectors (UK, eastern Newfoundland, Massachusetts). Its presence Iberia supports faunal links between West Gondwana domain during Series 2. records middle part regional Marianian Stage (uppermost 3 lowermost 4) correlates Biozone (lower Branchian Series).