
santanichis

ekadesham 11.5 kodi varshangalkk munbu albian kaalaghattatthil nilaninnirunna vamshanasham sambhavicha malsyangalude oru inamaanu santanichis diasi. "ezz. diasi "ettavum adisthaana-charaasiformaayi kanakkaakkappedunnu, ithu autoficiyude aadyakaala amgamaanu. 30 millimeteril kooduthal neelamulla aadhunikakaala herringinu samanamaaya oru cheria malsyamaayi ithu kaanapedunnu. aadhunikakaalathe tetrakale (piraanhaasukal ulppede) tharamthirikkunna kramamaya charasiformus kramatthile ettavum aadima amgamaayi athine mattunna oru veberian upakaranathinte saannidyamaanu athinte ettavum sradheyamaaya savisheshatha. "braseeliludaneelamulla niravadhi sthalangalil ninnu cretatius kaalaghattatthile paarakalil ninnu "santanichis" kandethiyittundu. eee stharangalile athinte saannidhyam jaivabhoogolashaasthrathinte athinte kramatthinte parinaamathinteyum soochakamaayi kaanapedunnu.
shareeraghadanayum roopaghadanayum.
"santanichis" ennathu oru cheria, charasifom malsyamaanu, athu upariplavamaayi kooduthal noothana tetrakalumaayo bandhamillaattha heringukalumaayo saamyamullathaan. paramavadhi neelam ekadesham 3-4 centimeter staanderd neelamaanennu thonnunnu. nattellu nirayude aadya naalu kasherukkalil ninnu roopappetta oru aadimavum ennaal poornnavumaaya veberian upakaranam eee inathinu undu. ariyappedunna eathenkilum malsyavarggathil kaanapedunna gadanayude aadyakaala sambhavamaanith. shareeraghadanayude adisthaanathil, malsyam athinte kramatthil mattu palathinum samaanamaan. shareeram ardha-vashathayi compress cheyyukayum andotpaadanam nadathukayum cheiyunnu. oru charasifominu chirakukal erekkure poornnamaanu-"santanichis" nuu orotta dorsal, guda, kaudal chirakukalum pectoral, pelvik chirakukalum undu. asthikoodam anusarichu, malsyathinu 30-40 neelamulla kasherukkal undu. taxonil oru sankeernamaaya suspensorium kaanam. ennirunnaalum, thaadiyellu pallukal kanunnilla. cyclooid skeyilukal shareerathiludaneelam poornnamaayum kaanapedunnu.
shreniyum vitharanavum.
vadakkukizhakkan brazeelile santana roopeekaranathile romuvaldo amgathil ninnaan "santanichis" enna fossilukal aadyamaayi kandethiyathu. ararip thadatthile kunnukalil sthithi cheiyunna eee roopeekaranam athinte sambannamaaya aadyakaala cretatius janthujaalangalkk perukettathaanu. critatius kaalaghattatthile aapshyan ghattam vare "santanichis" fossilukal shekharicha prathyeka paarathalangal. eee janthujaalangalude koottatthinte valiyoru bhagam ardha-kramanugathamaaya edavelakalil kaanapedunna phoosil malsyangalude pindamaanu, vividha samrakshana avasthakalil "santanichis" enna malsyangal ulppede. saanthaanaykk purame, brazeelile mattu cretatius nikshepangalilum "santanichis" fossilukal kandethiyittundu. brazilian riachuvelo roopeekaranathinte, prathyekichu takwari amgathinte, cretatius nikshepangal "santanichis"-nte maathrkakal nalkiyittundu. vadakkukizhakkan brazeelile parnaiba thadatthile codo roopeekaranathil ninnu taxoninte fossilukalum kandethiyittundu.
santana roopeekaranathile romuvaldo amgathinte albian nikshepangalil ninnaan dgm-dnpm 647pii enna tharam maathruka eduthathu. mookkil ninnu wall adibhaagam vare ekadesham 4 centimeter neelamulla oru samboornna malsyathinte fosilaanithu. american museum oof naachural histtari kuranjathu rund dussen saambilukalenkilum amnah <aii. dii. 1> aayi sookshichirikkunnu. amnah 19439, amnah 12826 thudangiya valia malsyangalude phoosil cheytha vayarile ulladakkathil ninnaan "santanichis" nte chila saambilukal eduthathu.
parinaama charithram.
"santanichis diasi" "santanichis janussile eaka inamaanu". tetrakal ulppedunna oru kramamaya charasiformus kramathilaanu ithu tharamthirichirikkunnathu. vipuleekaricha legener gulikakalude saannidhyam ulppedeyulla athinte roopaghadanayude swabhaavangalude vishakalanam ithine ettavum adisthaana charaasifomukalilonnaayi sthaapichu. ithu, eee maathrkakal aadyakaala cretatius uthbhavavumaayi samyojippichu, ariyappedunna aadyakaala autofisan "santanichis" akkunnu; adutha charaasiphomukal ithinakam thanne avasaanathe cretatius kaalaghattatthile phoosil record theeyathi vare. ithu charaasiformukalude parinaamatthil niravadhi prathyaaghaathangal undaakkunnu. ellah aadhunika charaasiphomukalum karsanamaayi shudhajala enangalaanu. shantana roopeekaranam oru samudra avashishta roopeekaranamaanu, athinaal "santanichis" mikkavarum uppuvellathilo samudrajalathilo vasichirunna oru nivaasiyaayirunnu. gondwana bhookhandatthinte (africa thekke america) thakarcha muthal innuvare charasifom speesheesukalude parinaamatthinteyum chitharalinteyum samudra-tuu-fresh vaattar modaline ithu pinthunaykkunnu.
taxonomic charithram.
"1958ll leptolepis janussil "leptolepis diasi" ennaanu "santanichis diasi" aadyamaayi visheshippikkappettath. santana roopeekaranathil ninnulla phoosil malsyangalkku muppath centimeteril kooduthal neelamilla, avaye "charitraatheetha teleostukal" ennu visheshippichu, koodaathe maathrkakalum munbu ariyappettirunna mattu charitraatheethakaala malsyangalum thammil shareeraghadanayumaayi thaarathamyam cheythirunnilla. kandethal samayat vivaricha randaamathe "leptolipis" inam, "ell. diasi "janussinte tharam inamaaya ell aayappol anaathanaayi". bahiansis "veendum parisodhikkukayum mattoru janussil punarvargeekarikkukayum cheythu. "ell. diasi "jeenasile mattullavare apekshichu valare vyathyasthavum shareeraghadanayil purogamanaparavumaanennu kanakkaakkappettirunnu, 1991 ll maisi vargeekaranathil ithu janussil ninnu thirichittundu. eee inathinte nilavile janussaaya "santanichis" athinte yadhaartha vivaranam punarnirvachicha athe varshamaan srishtikkappettathu. niravadhi shareeraghadanakal kaaranam, ithu clupiomorphykullil punarvarggeekarichu. labhyamaya "santanichis" phoosil metteeriyalukalude thudarnnulla vishakalanangal chila gadanakal oru aadima veberian upakaranathinu samaanamaanenn nirnnayichu, ithu taxonine oru basel autofisan aayum charaasiformukalkkullilum punarvarggeekarikkaan prerippichu.

