Nimbadon lavarackorum

Overview

Nimbadon lavarackorum is a marsupial interpreted as having climbed trees despite its large body. Strong forelimbs and large, curved claws stand out. It presents the intriguing image of an animal weighing about as much as a person living in trees.^[1][3]

Key facts

The literature estimates its mass at approximately 70 kg. Large curved claws and freely moving forelimbs were interpreted as clues to climbing trees and grasping branches. The unfamiliar combination of a large body and life in trees is intriguing.^[1][3]

Time and place

It is known from the middle Miocene, approximately 15 million years ago, in present-day Queensland, Australia. Important material came from Riversleigh. Comparisons among the marsupials of this region help explore different ways of life in ancient forests.^[1]

The time range describes source context, not the complete duration of this species.

Size, form and skeleton

The forelimbs are strong and the hind limbs relatively short. The hands and feet bear large curved claws, and their first digits are described as partly opposable. This combination of limbs, hands, and feet provides important clues for studying tree climbing.^[1]

Habitat and reproduction

Its low-crowned molars are interpreted as indicating a diet of soft leaves. The arrangement of its claws and limbs was linked to the ability to climb trees and grasp branches. Diet and body function together inform research on this large marsupial’s forest life.^[1][3]

Fossil discovery

The AL90 material from Riversleigh includes skulls and postcranial bones. Fossils range from young to old individuals, allowing growth to be compared. Methods studying both the external form of bones and their internal tissue add to the history of the body.^[1][2]

References

1. Black et al. (2012) — Nimbadon in the trees
2. Study of growth in Nimbadon bone tissue
3. Herds Overhead: Nimbadon lavarackorum

Research questions

What skeleton would a large animal need to grasp branches? Researchers compare the forelimbs, hands, feet, and curved claws. Bone tissue offers another source of evidence for asking how the body changed during growth.^[1][2]

Observation

Move your gaze from the strong forelimbs to the large curved claws. Considering the relatively short hind limbs and the first digits of the hands and feet together reveals the combination of structures used to grasp trees.^[1]