
sphenodiscus

sphenodiscus hii acanthoceratasian ammonitechi namshesh jhaleli prajati aahe. hii prajati anek khandanmadhye aadhalali aahe aanee cretatiuschya uttaradhatil mastrictian tappyat tyache mothya pramanat jaagtik vitaran jhaale asave asey manale jaate. paleocene kalat sampoorn upvarg namshesh honyapurvi vikasit jhalelya shevatchya ammonoidspacky heey eka hote, jeey thet cretaceous-paleogen namshesh honyachya ghatanenantar hote.
dakshin carolina, uttar carolina, dakshin dakota, maryland, nyu jersey aanee meksikomadhil bhagantun sampoorn uttar americet jivashma sapadale aahet. jaree yethoon sapadalelya samagriche prajati staravar vargikaran kele jaau shakat nasale taree trinidad betavar hii prajati astitvat asalyacha purava dekhil aahe. uttar americet aadhalanaya samanya prajatinmadhye 'ess' chaa samavesh aahe. lobatus, "ess. lenticularis, aanee ess. pluricepta ". uttar amerikechya bahereel bhagatoon, udaharanarth, 'ess' sarkhya naveen prajati aadhalalya aahet. binkhorstee "netherlandsmadhil mastrict nirmitipasoon". bharatatil valudavoor nirmititil 'shiv' aanee 'ess. brazilmadhil reo gramemchya kinanyavaril khaata pasoon brasiliansis. ess chey anek namune. nayajeriyatil enakporo shelmadhunahi lobates aadhalale aahe.
sphenodisksche kavach suvyavasthit kele gele aanee ekapeksha jaast vartul aanee eka lahan nabhine lateromedally sankuchit kele gele. kavchatil ventral dhaar tivra koneey asate. jaree auntogenic vikasachya vegvegalya tappyanvar asalelya kahee prajatinmadhye tyanchya prushthbhagavar anek lahan kand asoo shakatat, taree bahya prushthbhag samanyatah jivashma namunyanmadhye gulgulit asato. "sphenodiskasmadhye anek lahan fandya aanee kathisah eka jatil shivan rachana hotee.