Early–middle Permian Mediterranean gorgonopsian suggests an equatorial origin of therapsids DOI Creative Commons
Rafel Matamales‐Andreu, Christian F. Kammerer, Kenneth D. Angielczyk

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Dec. 17, 2024

Abstract Therapsids were a dominant component of middle–late Permian terrestrial ecosystems worldwide, eventually giving rise to mammals during the early Mesozoic. However, little is currently known about time and place origin Therapsida. Here we describe definitive therapsid from lower–?middle palaeotropics, partial skeleton gorgonopsian island Mallorca, western Mediterranean. This specimen represents, our knowledge, oldest record possibly therapsid. Using emerging relaxed clock models, provide quantitative timeline for diversification therapsids, indicating long ghost lineage leading evolutionary radiation all major clades within less than 10 Myr, in aftermath Olson’s Extinction. Our findings this unambiguous an ancient summer wet biome equatorial Pangaea, thus suggesting that group originated tropical rather temperate regions.

Language: Английский

Functional and Character Disparity Are Decoupled in Turtle Mandibles DOI Creative Commons
Jasper Ponstein, Guilherme Hermanson, Maren Jansen

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(11)

Published: Nov. 1, 2024

Turtles have high shape variation of their mandibles, likely reflecting adaptations to a broad variety food items and ingestion strategies. Here, we compare functional disparity measured by biomechanical proxies character discrete morphological characters. Functional disparities vary between clades ecological groups are thus decoupled. Comparisons with cranial also indicate decoupled patterns within the turtle skull. Exploration mandibular reveals that several configurations or state combinations can lead same feeding type (i.e., convergence) be achieved at low exhaustion (e.g., cryptodires). Dietary specialists show larger than generalists, but phylogenetically widespread generalist ecology leads signals in ecotype. Whereas generally shows phylogenetic signal, correspond dietary specializations, which may occur convergently across different groups. Despite this, individual measurements overlapping ranges ecogroups do not always conform expectations. Jaw opening closing advantages model trade-offs force transmission opening/closing speeds, turtles values try synthesize into "jaw types". Closing mechanical advantage retain levels anterior jaw end compared other pseudosuchians). This possibly explained as an evolutionary adaptation bite forces small head sizes.

Language: Английский

Citations

1
Early–middle Permian Mediterranean gorgonopsian suggests an equatorial origin of therapsids DOI Creative Commons
Rafel Matamales‐Andreu, Christian F. Kammerer, Kenneth D. Angielczyk

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Dec. 17, 2024

Abstract Therapsids were a dominant component of middle–late Permian terrestrial ecosystems worldwide, eventually giving rise to mammals during the early Mesozoic. However, little is currently known about time and place origin Therapsida. Here we describe definitive therapsid from lower–?middle palaeotropics, partial skeleton gorgonopsian island Mallorca, western Mediterranean. This specimen represents, our knowledge, oldest record possibly therapsid. Using emerging relaxed clock models, provide quantitative timeline for diversification therapsids, indicating long ghost lineage leading evolutionary radiation all major clades within less than 10 Myr, in aftermath Olson’s Extinction. Our findings this unambiguous an ancient summer wet biome equatorial Pangaea, thus suggesting that group originated tropical rather temperate regions.

Language: Английский

Citations

1