What does this research mean for the field?

In Sceloporus lizards, habitat use best explains the multivariate size-fecundity architecture, whereas parity mode dominates covariation when broader reproductive traits are considered and influences transition rates among habitat-use states. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine the relative evolutionary contributions of a key innovation (parity mode) versus ecological context (habitat use) in shaping life-history traits in spiny lizards.

August 30, 2026Journal of Evolutionary Biology

Do key innovations outweigh ecological context in the evolution of life-history traits? Insights from spiny lizards ( Sceloporus )

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Authors

IDIsaac Diaz-OrtegaUniversidad Nacional Autónoma de México JZJ. Jaime Zúñiga‐VegaUniversidad Autónoma de la Ciudad de México OFOscar Flores-VillelaUniversidad Autónoma de la Ciudad de México

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Implication

Comparative phylogenetic analysis reveals distinct roles for parity mode and habitat use in spiny lizards, indicating that both key innovations and ecology drive life-history evolution.

Key Points

To determine the relative evolutionary contributions of a key innovation (parity mode) versus ecological context (habitat use) in shaping life-history traits in spiny lizards.
Assembled data on parity mode, habitat use, and nine life-history traits (including female snout–vent length, offspring size, and clutch/litter size) across 88 Sceloporus species.
Conducted univariate and multivariate Bayesian phylogenetic mixed models alongside phylogenetic comparative analyses to model evolutionary transitions and phenotypic covariation.
Parity mode correlated with transition rates among different habitat-use states, whereas habitat use more strongly explained the multivariate size–fecundity phenotypic architecture.
Reproductive allocation reflected both the offspring size–number trade-off and temporal reproductive effort, with parity mode dominating multivariate covariation when broader reproductive traits were integrated.

Cite This Study

Diaz-Ortega et al. (2026) studied this question.

synapsesocial.com/papers/6a941ce46c1a8fb52e79e736 https://doi.org/10.1093/jeb/voag082

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Implication

Comparative phylogenetic analysis reveals distinct roles for parity mode and habitat use in spiny lizards, indicating that both key innovations and ecology drive life-history evolution.

Do key innovations outweigh ecological context in the evolution of life-history traits? Insights from spiny lizards ( Sceloporus )

Discussion

Member takes

Implication

Key Points

Cite This Study

Do key innovations outweigh ecological context in the evolution of life-history traits? Insights from spiny lizards ( Sceloporus )

Discussion

Member takes

Implication

Key Points

Cite This Study

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