
pycnodonde

vamshanasham sambhavicha chippikal, grifieday kudumbatthile phoosil maraine bivalve molaskkukal, nura chippikal allengil thencomp chippikal ennivayude oru janussaanu pycnodonde. valenginian (140.2 Ma) muthal aadyakaala plaistoseen (0.781 Ma) vare phoosil shell kidakkakalil eee janussile speesheesukalude shellukal lokamembaadum kaanapedunnu. nyoojezhsiyile navsingh roopeekaranathinte cretatius shelbedukalil saadhaaranayaayi kaanapedunna fosilukalaanu avaa.
speeshees.
pycnodonde" janussile enangalil iva ulppedunnu
eee janussile speesheesukalude fossilukal lokamembaadum cretatius muthal kwaattenari vareyulla avashishtangalil kandethiyittundu (prayaparidhi 140.2 muthal 0.0781 dasalaksham varshangalkk munbu).
fossilukal saadhaaranayaayi valia paalikalilo kidakkakaliloo nilanilkkunnu. thalasthaana reef desheeyodyaana pradeshamaaya udayil, eee fosilukalude paalikk patthu adii vare kattiyundu, ithu mancos sheyil bhinnasamkhyayude thaazhathe tunank vibhaagathil, dakota manalkkallin mukalilum neela gettu sheyil paaliyude thaazheyumaan. hanksville, uttaa pradeshathu, "pycnodonde newberry" muthuchippi oru valia pradeshathu thurannukaattappedunnu. eee kidakkakalil onniladhikam enangal undo ennu nirnnayikkaan nilavil padanangal nadakkunnundu.