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A primary difference between ammonites and nautiloids is the siphuncle of ammonites (excepting Clymeniina) runs along the ventral periphery of the septa and camerae (i.e., the inner surface of the outer axis of the shell), while the siphuncle of nautiloids runs more or less through the center of the septa and camerae.
Engonoceratidae is a family of typically compressed, more or less flat sided and involute ammonites (cephalopod order Ammonitida) from the mid Cretaceous belonging to the Hoplitoidea. shells have flat sided outer rims ( venters), at least in some stage.
Plants vs. Zombies character redirects to lists (2 P) Pages in category "Plants vs. Zombies" The following 8 pages are in this category, out of 8 total.
The Medlicottiinae is a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida, characterized by having discoidal to thinly lenticular shells with a retuse (grooved) venter and sutures with bifid auxiliary lobes.
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From 2003 to 2008, zombies were far ahead of vampires; at the same time, the housing bubble led to a huge economic boom that spurred a furious rush of consumer spending.
Dipoloceras is a rather evolute, strongly ribbed and well keeled acanthocerataean ammonite from the Albian stage of the Lower Cretaceous included in the brancoceratid subfamily Mojsisovicziinae.
Ammonoidea is a proper taxon within the Cephalopoda, commonly thought of as a subclass. It deserves an article of its own, under that title. and with taxobox. Ammonoid is simply the familiar term for Ammonoidea and refers to any member of the subclass. The term can be linked directly to Ammonoidea without going around through redirect.