Callavia

Callavia is an extinct genus of trilobite arthropods. Callavia lived during the late Atdabanian stage, which lasted from 530 to 524 million years ago during the early part of the Cambrian Period in what are today Canada and the United States.

Taxonomy

The position of Callavia in relation to other Olenellina has shifted repeatedly over time. Initially it was assigned to the Holmiinae by Pierre Hupé, and was later moved back and forth to the Callaviinae. Lieberman, however, argues Callavia is a basal member of the Judomioidea.
Reassigned Species

C. bicensis = Elliptocephala walcotti
C. breviloba = Olenellus breviloba
C. brevioculata = Nevadella cartlandi
C. burri = Nevadia burri
C. cartlandi = Nevadella cartlandi
C. cobboldi = Nevadella cartlandi
C. eucharis = Nevadella eucharis
C.? nevadensis = Olenellus nevadensis
C. perfecta = ''Nevadella perfecta''

Distribution

C. broeggeri is known from the Lower Cambrian of Newfoundland, Nova Scotia, Canada, and Massachusetts, USA.
C. choffati is known from the Iberian Peninsula in the Elvas Municipality in Portugal and in several localities in the Huelva Province, Spain. C. callavei is found in the Comley Limestone in Shropshire, England.

Ecology

C. broeggeri occurs together with the bracihiopods Sunnaginia imbricata and Eccentrotheca kanesia, and
the agnostid Serrodiscus bellimarginatus.