Archosaur
Let an agent explain archosaurs and their evolution, relay phylogeny, major groups and fossil examples from palaeontology sources with debates attributed, describe the groups and species the registry aliases name, and distinguish archosaurs from other reptiles, from dinosaurs alone and from marine reptiles such as ichthyosaurs.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain archosaurs and their evolution, relay phylogeny, major groups and fossil examples from palaeontology sources with debates attributed, describe the groups and species the registry aliases name, and distinguish archosaurs from other reptiles, from dinosaurs alone and from marine reptiles such as ichthyosaurs.
A clade of diapsid reptiles that includes birds and crocodilians as living members and extinct groups such as dinosaurs, pterosaurs within Pterosauromorpha and the crocodile-line Pseudosuchia, including notosuchians such as Notosuchus terrestris, Baurusuchus pachechoi and the pug-nosed Simosuchus clarki, and marine Tethysuchia; archosaurs dominated terrestrial ecosystems in the Mesozoic.
What it is for: Not applicable; an animal clade.
It can be explain the clade; relay phylogeny and groups; describe fossil examples; distinguish related groups.
Distinguishing features
Antorbital fenestra
Teeth in sockets
Bird and crocodile lines
Mesozoic dominance
What it looks like
Varied, from birds and crocodiles to extinct dinosaurs and pterosaurs.
Physical character
origin: about 250 million years ago - Early Triassic
living groups: birds and crocodilians list
main lineages: Avemetatarsalia and Pseudosuchia list
How it is recognised
Clade of birds, crocodilians and their extinct relatives
Pterosauromorpha, Pseudosuchia, Tethysuchia, Simosuchus, Baurusuchus, Notosuchus
Lizards and snakes are lepidosaurs; dinosaurs are one archosaur group; ichthyosaurs are not archosaurs
Related models
is a kind of - in registry terms
includes -
includes -
is contrasted with - lizards, snakes and tuatara
In practice
Families and kinds
Pseudosuchia including crocodilians and notosuchians
Tethysuchia
Avemetatarsalia including Pterosauromorpha and dinosaurs
birds
notosuchians such as Simosuchus, Baurusuchus and Notosuchus
Standards and regulation
ICZN nomenclature
Fossil protection laws in many countries
Failure modes and hazards
Treating all prehistoric reptiles as dinosaurs
Presenting contested phylogenies as settled
Registry aliases mixing clades and species
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.archosaur
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What archosaurs are.
Science.
Definition
Definition.
Definition
Definition.
- What are archosaurs, and how do they differ from other reptiles, dinosaurs alone and marine reptiles? definition
- Is the question about the clade, a group, a fossil species or evolution? boundary
Groups
Groups and species.
Groups
Groups.
- What are Pterosauromorpha, Pseudosuchia, Tethysuchia, Simosuchus clarki, Baurusuchus pachechoi and Notosuchus terrestris? definition
- Which entry fits the specific group or species? action
Evolution Evolution.
Attribution.
Phylogeny
Phylogeny.
Phylogeny
Phylogeny.
- How are archosaurs related, and what is debated about their early branches, with positions attributed? provenance
- Which references are standard? provenance
Triassic
Triassic radiation.
Triassic
Triassic.
- How did archosaurs diversify after the Permian extinction? provenance
- Which sources are cited? provenance
Fossils Fossils.
Science.
Notosuchians
Notosuchians.
Notosuchians
Notosuchians.
- What do notosuchian fossils from South America and Madagascar reveal? provenance
- Which entry fits Notosuchia? action
Pterosaurs
Pterosaurs.
Pterosaurs
Pterosaurs.
- How are pterosaurs related to dinosaurs within archosaurs? provenance
- Which entry fits pterosaur? action
Context Living archosaurs.
Context.
Living
Birds and crocodilians.
Living
Living.
- What traits do birds and crocodilians share as living archosaurs? provenance
- Which entry fits bird? action
History
History of study.
History
History.
- How was the archosaur concept developed? provenance
- Which entry fits the history of palaeontology? action
What the second pass must settle
- Should the notosuchian species be separate primary entries?
- How should palaeontology sources be linked?
- The registry entry has merged aliases naming clades and species; should they be split off?