Chirostenotes (Greek for "narrow hand"); pronounced KIE-ro-STEN-oh-tease
Chirostenotes (Nobu Tamura)
Habitat:
Woodlands of North America
Historical Period:
Late Cretaceous (80 million years ago)
Size and Weight:
About 7 feet long and 50-75 pounds
Diet:
Probably omnivorous
Distinguishing Characteristics:
Narrow, clawed fingers on hands; toothless jaws
About Chirostenotes:
Like Frankenstein's monster, Chirostenotes has been assembled out of odd parts, at least in terms of its nomenclature. This dinosaur's long, narrow hands were discovered in 1924, prompting its current name (Greek for "narrow hand"); the feet were found a few years later, and assigned the genus Macrophalangia (Greek for "big toes"); and its jaw was unearthed a few years after that, and given the name Caenagnathus (Greek for "recent jaw"). Only afterward was it recognized that all three parts belonged to the same dinosaur, hence the reversion to the original name.
In evolutionary terms, Chirostenotes was closely related to a similar Asian theropod, Oviraptor, demonstrating how widespread these dinosaurs were in the late Cretaceous period. As with most tiny theropods, Chirostenotes is thought to have sported feathers, and it may have represented an intermediate link between dinosaurs and birds.
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Bob Strauss is a freelance writer and book author; one of his specialties is explaining scientific concepts and discoveries to both a lay and professional audience.
Bob Strauss is the author of two best-selling question-and-answer books that range across the expanse of science, biology, history and culture: The Big Book of What, How and Why (Main Street, 2005) and Who Knew? Hundreds & Hundreds of Questions & Answers for Curious Minds (Sterling Innovation, 2007).