
basleroserida

saadhaarana upayogathilillaatha exogastric longiconic syrtoconukal ulkkollunna oordovishiyanil ninnulla notiloid sephalopodukalude oru kramamaanu basleroserida.
vargeekaranam.
poorvvika elesmeroseridaykkum kooduthal noothanamaaya tarficeridaykkum oongooseridaykkum edayilulla idanilakkaarkkaayi flover aandu kummel (1950) aanu basleroserida oordar sthaapichathu. yadhaarthathil nirvachichathupole, eee kramatthil rund kudumbangalundu, tarficeridaykku kaaranamaaya kattiyulla mathilukalulla sifankilukalulla basleroseratidaeyum onoseridaykku kaaranamaaya nerttha mathilukalulla sifankilukalulla aadyathethil ninnu uruthirinja grasiloseratidaeyum. grasiloseratideyiloote basleroserida, barandioceridaykku kaaranamaayirikkam enna pookkalileyum kummalileyum (1950) oohaapohangal chila vargeekaranangalil basleroseridayil baradoserina ulppeduthiyathinum devonian vare kramam vyaapippikkunnathinum kaaranamaayekkam. ennirunnaalum, tarficeridaykkullil ninnu barandioceroidukalude uthbhavam nannayi sthaapithamaanu.
basleroserida pothuve upayogashoonyamaayitheernnir, taxa ippol ellesmeroseridayilo allengil tarficerida, oongooserida ennivayilo ulppeduthunnu, ennirunnaalum shevarev (2006) eee kramam amgeekarikkunnathu thudarnnu. furniture glenisterum (1964) ellesmeroseridayil basleroseratidae ulppeduthumbol sweettil (1964) athinte derivative, oongooseridayil grasiloseratidae ulppeduthi. pookkal (udha.jii. 1976) pakaram bascleroseritidae tarficeridayil ulppeduthi.
roopaghadana.
basleroserid sophtt part anattamiyekkurichu onnum ariyilla, ennirunnaalum avaykku 8 allengil 10 kaikalulla orupakshe squid polulla shareerangal undayirunnathaayi anumaanikkappedunnu.
shellukal cheruthum ekadesham 12-15 centimeter (5-6 inch) neelamullathumaanu; mukalilekku, exogastric, vakrata-oru rocker pole-upavrithaakruthiyil ninnu vashathayi compress cheytha cross sekshan vare neelamullathaanu. baahya vakrathayile ventar saadhaaranayaayi kooduthal moorchayulla vrithaakruthiyilullathaanu, ithu aantharika vakrathayile dorsaminekkaal keel polulla roopam nalkunnu. septa aduthulla idamaanu, sifankil ventral.
basleroseratidaeyile sifankil poorvvika elesmeroseridayilum aadima tarficeridayilum kaanapedunna kattiyulla bandhippikkunna valayangalaal nirmmithamaan. oongooseridayil kaanappedunnathupole, grasiloseratidaeyil ninnu uruthirinja valayangal nerthathaanu.

