Spondylozoa includes the vertebrate fauna on Sagan 4.

Domain: Eukaryota

Superkingdom: Viridisagania

Kingdom: Carpozoa

Phylum: Spondylozoa

Superclass - Anisoscelida

Class - Saganisuchia

(ancestral snappers and earbacks)

Order - Hymenodorsiformes

(stem earbacks)

Family - Ovisauridae (eggsnappers)
Family - Actinosauridae (Grasssnapper and it's descendants)

Order - Dorsaurosauria

(true earbacks)

Family - Anoptidae(modern earbacks)
Family - Earsauridae(basal-earbacks)

Order - Sledobelonia

(sledos)

Class - Dakoptera

(skysnappers)

Order - Dakopteriformes

(skysnappers)

Family - Tectopteridae (basal skysnappers)
Family - Tromerocaelidae (Vultsnapper and skyreapers)
Family - Insulasauridae (islesnappers)
Family - Gulodrakonidae (skimsnappers)
Family - Laridrakonidae (gull-like skysnappers)
Family - Mainedrakonidae (tipsnappers and corvisnappers)
Family - Passerisauridae (Weavesnapper and descendants)

Class - Saurochelones

(turtsnappers)

Order - Dakochelones

(basal turtsnappers)

Family - Saurochelonidae (basal turtsnappers)
Family - Deinokoopasiidae (boxingtoes)
Family - Pistaredentidae (armorsaws)
Family - Petromolisauridae (coastsnappers)

Order - Fluniformes

(flunes)

Family - Spherosauridae(basal flunes)
Family - Spinomaxillidae(flunejaws)
Family - Spinobatrachidae(toadtugas)

Order - Teguloterguformes

(tilebacks, lizatokages, and tilecorns)

Family - Shinglesauridae (tilebacks, lizalagartos, and pebblebacks)
Family - Tegulasauridae (lizatokages)
Family - Ungulasauridae (Guangu)
Family - Pyrosauridae (flamebacks)
Family - Cataphractovermidae (crallsnapers)
Family - Stegocornidae (tilecorns)
Family - Poseidonasauridae (rippletails)

Order - Acanthomoi

(Thornbacks)

Family - Parashinglesauridae (basal thornbacks)
Family - Remiscapulidae (articulate thornbacks)
Family - Pseudoaperidae (duramboars)
Family - Pseudodorcidae (curazzelles)
Family - Baculosauridae (pearbacks and striders)
Family - Vexillophoridae (flaggs)
Family - Vexillativestidae (blubber flaggs)
Family - Fortimaxillidae (snapjaws)
Family - Dillosauridae (Thorndillo)
Family - Canivibrissidae (giant thornbacks)
Family - Milnisauridae (hockels)
Family - Susochelonidae (cryorashers)
Family - Acunaribidae (probefaces)
Family - Xenocheiridae (thumbwalkers)
Family - Fossorirostridae (rootdiggers)

Order - Refulgisauria

(non-Yellowfeen glowsnappers)

Family - Refulgichelonidae (tablesnappers)
Family - Nothogyrinidae (voloxes)
Family - Pharocaudidae(signaltails)
Family - Nautichelonidae(hullbacks)
Family - Nitercanthidae(glowspikes)
Family - Circuitiochelonidae (Migrating Glowsnapper and Marine Glowsnapper)
Family - Sailsauridae(sailshells, sailmails)
Family - Tronasauridae(glowoggs)

Order - Gyriniformes

(Yellowfeen and descendants)

Family - Ichthyogyrinidae (Yellowfeen)
Family - Aletidae (wolleys)
Family - Batogyrinidae (floor onamors)
Family - Piratidae (landlubbers)
Family - Glossigyrinidae (feefs)
Family - Trisimidae (chromankes)

Class - Saganophidia

(limblesses)

Order - Saganophidia

(limblesses+seaswimmers) Superfamily - Teratophoidea (stem-limblesses, i.e. everything not descended from the rainforest limbless) Superfamily - Eusaganophidioidea (True limblesses)

Family - Loricolubridae (descendants of the Squat Limbless other than the Tejdaw and its descendants)
Family - Tedjavidae (Tejdaw and its descendants)
Family - Stegochordidae (Serpmanders and allies)
Family - Loricacollidae (Crested Limblesses)
Family - Scopaspidopophidae (Skywatchers)

Superfamily - Ophanguilloidea (seaswimmers)

Family - Jasconidae
(are any more Ophanguilloid families needed?)

Order - Eudigitogradia

(wadjetsaurs, attercops etc.)

Family - Brachiophidae ("armed" wadjetsaurs inc. deflatersaur)
Family - Arachnochelidae (attercops)

Class Caudopodosauriformes

(basal caudopods)

Order Pentapodiformes

(Base group + Stem Dwellers; "5-foot form")

Order Tripodiformes

(Roamers + stem Capiris; "3-foot form")

Class Soricia

(shrews; "shrews")

Order Cynosauriformes

(Basal, reptile-like shrews only; includes basal blood shrews)

Order Bullapella

(Bubbleskins; "bubble-hide")

Subclass Chaetotheria

(Furred shrews; name taken from the genus of the Hairy Shrew)

Superorder Palaeochaetotheria

(Basal, straight-backed furred shrews)

Order Eochaetotheria

(Basal furred shrews)

Order Pinnaetheria

(Stalking shrew-grade shrews)

Order Aquatheria

(Shrotters)

Superorder Lumbaritheria

(stem furred shrews with an arched back)

Order Currenatheria

(Velishroot- and Xolagoba-grade shrews)

Order Fabula

(Gluts, "myth/fable")

Superorder Porcotheriformes

(Whiskerpick-grade + cheekhorns and their relatives)

Order Porcotheria

(Whiskerpick-Cheekhorns)

Superorder Tamia

(Tams)

Order Ornata

(Basal tamows, "decorated")

Order Lignatores

(Tamjacks, "lumberjacks")

Order Neotheria

(Neoshrews, "new beasts")

Class Acaudopodia

(Azelaks; taken from their existing taxon name)

Order Chamaelifera

(Basal 4-legged azelaks, including azelemurs; name taken from azelak's genus)

Order Azeraptora

(Bipedal azelaks descended from Azelak Scavenger; named for Azeraptor)

Class Arcuvelia

(Capiris and bipedal capiri-like capoos; "rainbow sail")

Order Vexillacephalia

(non-capiri capoos descended from Roaming Capoo, including capeyes; "flag head")

Order Euarcuvelia

(true capiris)

Class Eucaudopodosauria

(modern dwellers starting at Denclaw; keeping the name because they include the last living tail-walkers)

Order Palapusia

(basal, mostly burrowing modern dwellers, including shoveltails; "shovel claw")

Order Lophoraptora

(Sawgnaws; "crest-theif")

Order Lophocula

(Descendants of Sawclaw, including crown-group dwellers; "crest-eye")

Superclass - Squalichthyes

(snarks, scylarians, and snatches)

Class - Eusaganisqualia

Order - Dracosqualiformes

(scylarians)

Family - Dracosqualidae

(basal scylarians)

Family - Teratocetidae

(lyngbakrs)

Family - Hafagufidae

(thrasher scylarian and descendants)

Family - Infernocetidae

(rhodix scylarians)

Family - Slaesosauridae

Order - Snalinia

(snarks)

Family - Snalinidae

(luceremundare serpentes and basal snarks)

Family - Bhuyawmhidae

(gharks)

Family - Snallachiidae

(brute snarks)

Family - Branchiorhinidae

(comet snark and gillcrests)

Order - Rapacicetes

(snatches)

Family - Hydrocollidae

(crown-snatches)

Class - Protosaganispondyla

Order - Volociformes

Order - Carposerpentes

Spondylozoa