In quest for a phylogeny of Mesozoic mammals

Eutriconodonta is recovered as a sampled Mesozoic mammal grouping in the broad morphology analysis, but membership and relationships among “triconodont” taxa change across character sets; the atlas label therefore denotes a tested hypothesis, not a fixed ancestor branch.

Broad Mesozoic matrices distinguish crown-based Mammalia from more inclusive mammaliaform usage, and Jurassic euharamiyidan analyses can move key fossils across that boundary; the atlas Mammalia route therefore does not turn its 225 Ma display ceiling into a crown origin date.

The sampled morphological analysis distinguishes Mammaliaformes from narrower crown-based Mammalia and places several early Mesozoic groups around that boundary; membership is definition- and matrix-dependent rather than a continuous ancestor sequence.

A broad Mesozoic-mammal character analysis uses Mammaliamorpha for the sampled branch that includes tritylodontids and mammaliaforms, while alternative definitions and matrices alter several basal placements; the label is not a dated crown or direct-ancestor category.

Morganucodontans are sampled as early mammaliaforms outside narrower crown Mammalia in the cited broad character analysis; this placement is a higher-taxon convention and topology, not evidence that Morganucodonta is the direct ancestor of living mammals.

Mammaliamorpha is displayed at 225–0 Ma only as the review's definition-dependent sample envelope, not an exact clade origin or direct ancestor sequence. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.

Mammaliaformes is displayed at 225–0 Ma only as the review's sampled, definition-dependent navigation envelope, not a crown-Mammalia origin date. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.

Morganucodonta is displayed at 201.4–145 Ma only as the synthesis's sampled fossil envelope, not exact global genus-group endpoints. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.

Eutriconodonta is displayed at 201.4–66 Ma only as the matrix sample's broad Mesozoic coverage, not a stable membership list or exact endpoints. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.