Joyce, W.G.
taxonomy · topology · range · morphology · methods
Morphological analysis of 45 fossil and 22 living turtle species, including an explicit Cryptodira node and partly unresolved internal relationships.
The Cryptodira route represents the sampled crown-side turtle clade in Joyce’s morphology matrix; relationships within Cryptodira are partly unresolved, and the analysis does not supply an exact crown origin or global first appearance.
claim:taxon:cryptodiraJoyce’s matrix defines and samples Cryptodira but does not validate 155.6 Ma as a crown-cryptodire minimum; the former borrowed display is withheld pending a node-specific calibration.
claim:taxon:cryptodira:range-boundaryLi et al. place Odontochelys basal to the known fossil and living turtles in their analysis, while the broader Mesozoic turtle matrix of Joyce samples 45 fossil and 22 living species; this profile retains Testudines as a navigation route rather than a single resolved stem-to-crown topology.
claim:taxon:testudines:taxonomy