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CVA Synapomorphies

literally about to scream rn

QuestionAnswer
notochord, dorsal hollow nerve chord, post anal tail, endostyle chordata synapomorphy
neurocranium, single semicircular canal, paired external sense organs, neural crest, cartilage, 5-part brain craniata synapomorphy
vertebrae, 2 semicircular canals, lateral line system, electroreception, bone, dermal brain case gnathostomata synapomprphy
jaws, occipit, pelvic fins, 3rd semicircular canal chondrichthys synapomorphy
Triploblastic Bilateral symmetry Coelom Deuterostome Cephalized body plan Chordate Plesiomorphies
Neurocranium “brain pan” Neural crest Makes the new pre-otic head bits gives rise to sensory organs, part of the cranium & some teeth Paired external sense organs Five part brain Cartilage Single semicircular canal craniata synapomorphies
Electroreception Bone secondarily lost in lampreys 2nd semicircular canal agnathans 1 or 2 Dermal braincase Lateral Line System Paired pectoral appendages vertebrata synapomorphies
pelvic claspers serial teeth replacement Placoid scales Marine, some freshwater ventral mouth Gnathostomes: Chondrichthyes synapomorphies
Skeleton ossified endoskeleton Bony Operculum covered gill slits Overlapping scales little to no bone swim bladder buoyancy, adjustable note anatomy – air from stomach through pneumatic duct into bladder Mouth: anterior tip osteoihthys synapomorphies
4 appendages with digits One ear bone Columella or stapes tetrapoda synapomorphies
Eggs – laid in water – no shells or amniotic membranes Aquatic larval stage w/ gills Usually paired lungs – respiration thru skin Bone loss in skull & pectoral girdles One middle ear ossicle = Columella amphibia synapomorphies
hair mammary glands 3 middle ear bones muscular diaphragm sweat glands marrow within bones 2 sets of teeth biconcave, anucleate red blood cells well-developed cerebral cortex mammalia synapsida synapomorphies
2 temporal fenestra diapsida synapomorphy
claws, scales, diapsid skull, single occipital condyle, feathers aves synapomorphy
Created by: emma.boc
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