
plectronoserida

plectronoserida hii eka adim kramvari aahe jithun tyanantarchya sephalopod kramvari shevati prapt hotat.
ghatana.
chean aanee uttar americetil (minnesota, wisconsin) varchya cambrian (varchya franconian-madhya trempilion) pasoon plectronocerateds olakhale jaatat. done kutumbe olakhali jaatat (phool, 1964), samanyatah thet endogastric plectronoseratidae aanee kinchit exogastric balcoseratidae.
nidanatmak varn.
plectronoseridache sadasya khalilpramane darshavile jaatat. kavach samanyatah lahan asatat, kahee agadi lahan, bajukadil sankuchit, vakr (cyrtoconic) kinwa saral (orthoconic) asatat. bahutek cyrtoconic prakar endogastric asatat, jyamadhye ventral bajoo rekhanshatah avtal asate kinwa prushthbhagachi bajoo adhik rekhanshatah bahirmukh asate. kahee, balcoseratidemadhil done dnyat prajati bahya jatharakar vakr aahet, jyat ventral bajuche bahirmukh aanee prushthbhagache avtal aahet. septa jawalche antar aahet, kahee millimeterpeksha qamee antaramadhye. cyphuncles heey ventral asatat aanee bahutek pramanat mothe asatat. jodana rings samanyatah kharab calcified asatat aanee jyaa kholya septal manene pratibandhit nasatat tyaa kholyanmadhye cyphonal bulb mhanoon vistaru shakatat.
serve shaled cephalopodspramanech, plectronoceridsmadhe cyphuncle navachi eka nalee hotee, jee tyanna tyanchya fragmoconchya kakshanna panyaivaji vayoone bharoo dete, asha prakare tyanchi tarangata niyantrit karate. matra, teey jett-chalit pohanyasathi anukool navhate.
phylogeny.
plectronoseratidane cambrianchya uttaradhat (suruvatichya aanee madhya thartharanya) elesmerosarida aanee protactinoserida aanee yanhesarida yaa itar teen plectronoseratoid kramancha uday keela. plectronoseratidemul itar elesmerosarid kutumbe nirman jhaali, jyat varchya cambrian exogastric balcoseratidiacha samavesh aahe aanee discosorida honyachi shakyata durvar aahe. balcoseratidae heey nantarchya bahya jatharjanya swarupanshi sambandhit naheet jeey pratham ordovicianmadhye disu lagale.
paryavaran.
plectronocerids heey bahudha benthic prani hote jeey ann kinwa surakshitatechya shodhat talashi, khalchya dishene, kavach varr gheuun sarkat rengalat asat. tyanchya vishisht mauu-bhagachya sharirshastrabaddal kinwa tamboo, jarr asateel tarr, kitee pramanat vikasit jhaale hote yabaddal kahihi mahitee nahee.