- News Home
5 December 2013 11:26 am ,
Vol. 342 ,
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
Since arriving on the island of Guam in the 1940s, the brown tree snake ( Boiga irregularis ) has extirpated native...
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
Thousands of scientists in the Russian Academy of Sciences (RAS) are about to lose their jobs as a result of the...
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
- 5 December 2013 11:26 am , Vol. 342 , #6163
- About Us
ScienceShot: Ancient Insects Trapped in Time
27 August 2012 3:05 pm
Roughly 230 million years ago, two mites and a midge got stuck in oozing resin from a now-extinct species of conifer tree in the mountains of northeastern Italy. They never moved again. Despite their ignoble deaths, the insects have now earned the distinction of being the oldest arthropods—invertebrates that include insects, arachnids, and crustaceans—ever found preserved in amber. Arthropods have scuttled and crawled over Earth’s surface for more than 400 million years, but prior to this discovery the oldest specimens collected in amber were only 130 million years old. The three amber-bound arthropods were sorted from roughly 70,000 2 millimeter to 6 millimeter bits of amber (upper left image) excavated from an outcrop in the Italian Dolomite Alps. They date about 100 million years earlier than previously collected specimens, and were probably trapped during a 10-million-year climatic shift that caused the trees to produce more resin than usual, researchers say. Although they could not identify the midge fly due to lack of well-preserved body parts, the mites are intact at a microscopic level of detail, which allowed the team to identify two new species of mites: Triasacarus fedelei (center) and Ampezzoa triassica (right). In their study, published today in the Proceedings of the National Academy of Sciences, the researchers report that the mites are the oldest known ancestors of the Eriophyoidea group of mites. Today, this group includes at least 3500 species and has a distinctive body type including bristly appendages called "featherclaws." Their presence in 230-million-year-old amber, researchers say, shows for the first time that mites evolved long before the appearance of flowering plants.
See more ScienceShots.