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The Burgess Shale in British Columbia contains very old (~550 million years ago), very rare fossils of very early organisms. This is Haplophrentis. The function of the pair of short spines is unknown but the creature was tiny, just a few centimeters in length (2.54cm = 1 inch)

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Devonian: geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period (about 419 may) to the beginning of the Carboniferous Period (about 358 mya); named after Devon, England, where the rocks from this period were first studied; 1st significant adaptive radiation of terrestrial life; no large vertebrate terrestrial herbivores yet, but free-sporing vascular plants spread across dry land, extensive forests

from overstock.com

The New World Primates: Adaptive Radiation and the Evolution of Social Behavior, Languages, and Intelligence (Paperback)

The New World Primates: Adaptive Radiation and the Evolution of Social Behavior, Languages, and Intelligence

Christopher ADAMS / My work plays on the biological speciation concept of “adaptive radiation”. The pieces themselves are not representational. Some are plant-like, while others are more faunal, but none depict a specific organism, or try to. Instead, they are all members of an arbitrarily evolved family of creations, each with the same number of appendages (18) attached in the same basic pattern-- a formula that simultaneously allows for both wild variation and aesthetic cohesiveness

from AoBBlog

Evolution of flower development during an adaptive radiation in Caiophora

The rare occurrence of a reversion to an ancestral state following adaptive radiations of pollination syndromes suggests that changes in the ancestral deve

Dinosaur Teeth: Dental and dietary diversity in multituberculate mammals. From Adaptive radiation of multituberculate mammals before the extinction of dinosaurs, Gregory P. Wilson et. al. Nature Vol 483, Issue 7390 (22 March 2012) #dinosaurs Nature Publishing Group

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from Robinson Street Books: Used and Rare

Evolutionary Theory and Processes of Active Speciation and Adaptive Radiation in Subterranean Mole Rates, Spalax ehrenbergi Superspecies, in Israel

Title Evolutionary Theory and Processes of Active Speciation and Adaptive Radiation in Subterranean Mole Rates, Spalax ehrenbergi Superspecies, in Israel Author