Definition

Noun: 1. A gigantic extinct terrestrial sloth-like mammal: A very large, extinct mammal that lived on land, resembled a sloth, and existed during the geological epochs of the Pliocene and Pleistocene, primarily in the Americas.

Usage Notes

• The term "ground sloth" is a common name for a group of extinct mammals belonging to the families Megatheriidae, Mylodontidae, and others.
• It specifically refers to their terrestrial (ground-dwelling) nature, distinguishing them from modern tree-dwelling sloths.
• The word is typically used in paleontological, biological, and natural history contexts.

Examples of Usage

• Noun:
  • Fossils of the ground sloth have been found from Patagonia to the southern United States.
  • The Megatherium was one of the largest genera of ground sloth.
  • Scientists study ground sloth coprolites (fossilized dung) to understand Pleistocene ecosystems.

Advanced Usage

• "to be descended from ground sloths": Used in evolutionary biology to discuss the lineage of modern tree sloths.
  • Modern two-toed and three-toed sloths are believed to be descended from ancient ground sloths.

Variants and Related Words

• Megafauna (n): A term for large or giant animals, especially those from the Pleistocene epoch, which includes ground sloths, mammoths, and saber-toothed cats.
• Xenarthran (n): The mammalian superorder that includes sloths, anteaters, and armadillos, both living and extinct (like ground sloths).

Synonyms

• Megatheriid (n): A more technical term referring specifically to members of the family Megatheriidae, a major group of ground sloths.
• Giant sloth (n): A common descriptive synonym emphasizing the animal's large size.

Related Phrases

• Ice Age megafauna: A phrase describing the large animals, including ground sloths, that lived during the glacial periods of the Pleistocene.
  • Ground sloths were a prominent part of North American Ice Age megafauna.

Noun

1. gigantic extinct terrestrial sloth-like mammal of the Pliocene and Pleistocene in America