Buitreraptor: a small, long-snouted dromaeosaur from Argentina
Buitreraptor is a small dromaeosaurid theropod from Cretaceous Patagonia, notable for its elongated snout, many small unserrated teeth, likely feathers, and placement in a southern group of 'raptors'.
Overview
Buitreraptor is a genus of small dromaeosaurid theropod known from Cretaceous deposits in what is now Patagonia. It measured roughly 1.5 metres (about four to five feet) from snout to tail and combined features of active predators with adaptations not seen in many northern dromaeosaurs. Fossils attributed to this genus were recovered from Argentinian rocks and described in the early 21st century. The animal is commonly discussed as part of southern hemisphere diversity of "raptors".
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Anatomy and distinguishing features
Buitreraptor is characterized by an unusually long, narrow and flattened snout and a jaw full of small, recurved teeth. Unlike many better-known dromaeosaurs, its teeth lack prominent serrations, and are recurved and sometimes grooved. The skull shape and fine-toothed dentition suggest a feeding style adapted to capturing small, slippery or lightly built prey rather than dismembering large carcasses.
Key characteristics
- Small overall size (around 1.5 m).
- Extremely elongated, low snout.
- Numerous small, unserrated or weakly serrated teeth.
- Long, gracile limbs consistent with an agile, cursorial lifestyle.
- Assignment to a southern clade of dromaeosaurids often referred to as unenlagiines.
Classification and relationships
Within Dromaeosauridae, Buitreraptor is placed among the southern, gracile forms sometimes grouped as unenlagiines. These southern dromaeosaurs show a number of differences from the more familiar northern taxa: proportionally longer snouts and limbs, and differences in tooth form. Its placement helps illustrate how dromaeosaurids diversified on different landmasses during the Cretaceous.
Palaeobiology and behavior
The long snout and slate of small teeth imply a diet of small vertebrates and invertebrates — for example lizards, small mammals and possibly insects — rather than large prey. Limb proportions suggest it was an active, fast-moving animal that relied on agility. Because many close relatives possessed feathers, it is very likely that Buitreraptor too bore some form of feathering on the body and forelimbs, which could have aided in display, thermoregulation or maneuverability.
Discovery, environment and significance
Specimens were discovered in Argentina and come from Cretaceous sediments in Patagonia. The environment they lived in supported a range of small vertebrates that fit the inferred diet of Buitreraptor. Its combination of traits helps paleontologists understand regional differences among dromaeosaurids and the variety of ecological roles these small theropods occupied. For further geological or taxonomic context see Cretaceous and regional notes at Argentina.
Questions and answers
Q: What is Buitreraptor?
A: Buitreraptor is a small dromaeosaur from the Cretaceous of Argentina.
Q: How long was Buitreraptor?
A: Buitreraptor was about four to five feet long (1.5 metres).
Q: What is the shape of Buitreraptor's snout?
A: Buitreraptor's snout is slender, flat, and extremely elongated.
Q: What kind of teeth does Buitreraptor have?
A: Buitreraptor's jaws have many small teeth which lack meat-tearing serrations or cutting edges. They are grooved, strongly recurved and flattened.
Q: What did Buitreraptor likely eat?
A: Buitreraptor probably ate quite small animals, like lizards and mammals.
Q: Did Buitreraptor have feathers?
A: Since its close relatives had feathers, it is likely that Buitreraptor also was feathered.
Q: Where was Buitreraptor found?
A: Buitreraptor was found in the Cretaceous of Argentina.
Related articles
Author
AlegsaOnline.com Buitreraptor: a small, long-snouted dromaeosaur from Argentina Leandro Alegsa
URL: https://en.alegsaonline.com/art/15190