dumortia

graphoseratidae kudumbatthilppetta amoniteukalude oru janussaanu dumortia.
phoosil record.
eee sephalopodukal athivegam neengunna nectonic maamsabhojikalaayirunnu. avar jeevichirunnathu aadyakaala jurassic, uyarnna tortian kaalaghattatthilaanu (ekadesham 180.1 muthal 175.6 dasalaksham varshangalkk munbu vare). eee janussile enangalude fossilukal bulgaria, canada, france, jarmmani, hungery, iraan, itali, spain, tunisia ennividangalil kaanam.
vivaranam.
"dumortyera" ore praayathilulla grammoserakalkkum kattuloserakalkkum samaanamaan, lalithavum soumyavumaaya sigmoid rebing thaazhnna ventral keelum ulla nertthathum discoidalaayi parinamikkunna shell undu, ennaal eee inathinu less rounded ventarum kaattuloseraykk subquadrate vorl section undu.
speeshees.
eee janussile enangalil iva ulppedunnu

