closest living relative to t rex

Introduction

The Tyrannosaurus rex (T. rex) is one of the most well-known and studied dinosaurs. Understanding its closest living relatives can provide insights into its evolutionary history and the broader context of dinosaur evolution.

Key Insights

Birds as Closest Living Relatives:
- Modern birds are considered the closest living relatives of T. rex due to shared characteristics and evolutionary lineage .
Evolutionary Traits:
- The discovery of smaller tyrannosaurs like Raptorex kriegsteini, which shares key features with T. rex, helps trace the evolutionary path of tyrannosaurids, indicating that these traits were present in smaller ancestors before the evolution of the giant T. rex.

Conclusion

Modern birds are the closest living relatives of the Tyrannosaurus rex. The evolutionary traits observed in smaller tyrannosaurs like Raptorex kriegsteini provide a glimpse into the evolutionary history of T. rex, showing that many of its predatory features were present in its smaller ancestors.

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Closest living relative to t rex

Summary

Introduction

Key Insights

Conclusion

Sources and full results

Tunicates and not cephalochordates are the closest living relatives of vertebrates

Tunicates, not cephalochordates, are the closest living relatives of vertebrates, redefining the origins of chordate animals and influencing the interpretation of developmental and genomic studies.

Evidence for a Tyrannosaurus rex from southeastern Colorado

A tyrannosaurid tooth and limb bone fragment from southeastern Colorado are tentatively identified as cf. T. rex, with a radius of 90 mm suggesting a biped weighing approximately 5.23 metric tons in Maastrichtian time.

Becoming T. rex

Raptorex kriegsteini, a small tyrannosaur from the Early Cretaceous, provides a glimpse at how tyrannosaurids evolved, offering insights into the origin of T. rex's predatory features.

Observations on Paleospecies Determination, With Additional Data on Tyrannosaurus Including Its Highly Divergent Species Specific Supraorbital Display Ornaments That Give T. rex a New and Unique Life Appearance

Tyrannosaurus was a multispecific, dimorphic dinosaur with visually distinctive supraorbital display ornaments, challenging the assumption that all large known specimens belonged to the one species T. rex.

TYRANNOSAURUS REX FROM THE UPPER CRETACEOUS (MAASTRICHTIAN) NORTH HORN FORMATION OF UTAH: BIOGEOGRAPHIC AND PALEOECOLOGIC IMPLICATIONS

Tyrannosaurus rex was a top carnivore in the Late Maastrichtian North Horn Formation, spanning diverse habitats and prey species across the Western Interior of North America.

The Identification of the Closest Living Relative(s) of Tetrapods: Phylogenomic Lessons for Resolving Short Ancient Internodes.

Lungfishes are the closest living relatives of tetrapods, with a robust identification despite nonstationary composition and missing data, using a multispecies coalescent approach and amino acid profile mixture models.

A high-resolution growth series of Tyrannosaurus rex obtained from multiple lines of evidence

T. rex's ontogeny exhibits secondary metamorphosis, with a transition from shallow to deep skull shape occurring between 13 and 15 years of age, and size and maturity congruent among juveniles and subadults, but not among adults.

A Computational Analysis of Limb and Body Dimensions in Tyrannosaurus rex with Implications for Locomotion, Ontogeny, and Growth

T. rex had body masses around 6000-8000 kg, with the torso becoming longer and heavier during ontogeny, and its limb "antigravity" muscles may have been as large as or larger than those of ratite birds.

T-REX: a web server for inferring, validating and visualizing phylogenetic trees and networks

T-REX web server efficiently reconstructs phylogenetic trees, reticulation networks, and horizontal gene transfer events from distance or sequence data, enabling interactive HGT identification.

Growing up Tyrannosaurus rex: Osteohistology refutes the pygmy “Nanotyrannus” and supports ontogenetic niche partitioning in juvenile Tyrannosaurus

Tyrannosaurus rex grew up as a mid- to large-sized carnivore, with a rapid shift in body size and ontogenetic niche partitioning late in its ontogeny.

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