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Yakovlevia zyriankensis

L'EdV a l'ha dij dàit për 2 atribù, dont:

prima aparission
- URI: http://eol.org/schema/terms/FossilFirst
- Definission: The first appearance of this taxon in the fossil record.
smon-e tute j'argistrassion
wordian age
- URI: http://resource.geosciml.org/classifier/ics/ischart/Wordian
- Atribussion: International Chronostratigraphic Chart: http://www.stratigraphy.org/index.php/ics-chart-timescale
smon-e tute j'argistrassion