
macrocephalites

macrocephalites stephanoceratoid ammonite parivaar macrocephalitidae kaa ack vansh haye, joe madhya jurassic key colovian charan kaa nidan kartaa haye. teen upa-janra, "dolicaphalites", "comptocophalites", aur "pleurocephalites" koo "macrocephalites" key alawa pahachaana jaataa haye, jisamen "indocephalites" koo asthaayi roop seey chauthe key roop mein shamil kiya jaataa haye.
macrocephalites" kaa nidan.aiss..
"macrocephalites" mein hii ack majboot ribbed, involute, subglobose seey discoidal shale hotaa haye jisamen kuchh hudd taka chhota khula naabhi, sampeedit whirl section, chauda seey adhik aur goal venter hotaa haye. praarambhik ghoornan baad kii tulanaa mein adhik majboot ribbed hotey hain, joe chikane shareer kaksh key saath samaapt hotey hue chikane hoe jaate hain. praathamik pasaliyan, joe naabhi seey radial roop seey nikalati hain, vibhajit hoti hain aur kabhi-kabhi madhya paarshv koo tri-vibhajit karati hain aur nirbaadh roop seey venter koo paar karati hain. gole badey, aur vishal bhee hoe gaye. vitaran vyaapak haye.
upa-peedhi.
dolycaphalites samanya roop mein "macrocephalites" key samaan hotey hain lekin isamen maheen pasaliyan hoti hain joe anta taka jaari rahati hain aur kabhi badee naheen hoti hain.
comptocaphalites 'macrocephalites' kii tulanaa mein adhik globose haye, jisamen ack avasaadgrast whirl section haye, joe uchch, motey taur parr dhanushakar venter, motey plicket ribbing aur vyaapak naabhi seey adhik chauda haye.
pleurocephalites mein avasaadgrast whirl section aur tej ribbing key saath ack vyaapak khol bhee hotaa haye joe anta taka jaari rahata haye. wharl key bheetari bhaag parr praathamik pasaliyan peechhe kii or dorso-ventrally dhalaan parr hoti hain.
indocephalites praarambhik vikas charanon mein chaude aur motey roop seey ribbed hotey hain lekin vayask mein chikane aur adhik sampeedit hoe jaate hain.