What are the features, aspects, details and relationships of the subclass Archosauria of reptilia compared to...

What are the features, aspects, details and relationships of the subclass Archosauria of reptilia compared to ALL of the following:

the subclass Archaeornithes

the Neornithes of the Aves

the subclass Eutheria of the Mammalia.

Expert Solution

SUBCLASS	FEATURES	ASPECTS	RELATIONSHIP
ARCHOSAURIA	Opening in lower jaw( mandibular fenestra), a high narrow skull with a pointed snout, teeth set in sockets(called thecodont tooth implantation)_and a modified ankle joint.	Crocodile line,dinosaurus	Triassic period all are carnivorous such as phytosaurus, aetosaurs,etc.,closely related to crocodiles and birds later beacuse of egg laying.
ARCHAEORINTHES	Includes all fossil bird from jurassic having toothed jaws,scaly limbs,long tails with tail feathers arranged in two parallel rows, Fore lims with three digits ending iin claws,free caudal vertebrate and free metacarpals.	Extinct jurassic fossil birds	They belong to jurassic period, with aves and sister group, the order crocodila together are sole living membres of unranked reptile clade archsauria.
NEORNITHES OF AVES	Jaws toothless, with short arranged in semicircle,fused metacarpals,digits of forelimbs rarely with claws and ribs with unicate process.	Include ostriches,kiwis,other modern birds	Aves and crocodilia contain in archosauria but due to advanced archosaurus with feathers which can fly they kept in neornithes(modern bird)
EUTHERIA OF MAMMALS	Presence of placenta dor nutrient exchange and wates between blood of mother and featus,	cyanodonts	Closely related to marsupials, give birth to live young. They diverged from late jurassic.

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