A
beautiful gem or a scientist’s dream? You can have both, as researchers
in Mexico recently discovered after finding the remains of
a 23-million-year-old lizard fossil, well preserved with soft tissue
samples, in a small piece of amber.
Amber often contains small remains of plants and animals, but it is rare to find complete vertebrates such as this lizard.
After
all, Anolis lizards have fascinated scientists for years, and have
provided researchers with an on-the-ground look at evolutionary
processes at work. In 2012, a study involving brown anole lizards in the
Bahamas was heralded for its documentation of natural selection,
according to LiveScience.
Considered
an example of evolutionary diversification, the Anolis genus
includes several hundred different species that live across the
Neotropics, Nature notes. The lizards thrive in warmer climates and are
often outfitted with large finger and toe pads, which help them climb
over a variety of surfaces quickly and efficiently.
The
Mexican fossil was found a few months ago in Simojovel, an area of the
Mexicanstate of Chiapas well known for its amber deposits.
The
trapezoidal piece of amber is only about 1.7 inches by 0.5 inches, but
it contains “a complete and articulated animal that also preserves
remains of soft tissue and skin,” Francisco Riquelme of the National
Autonomous University of Mexico’s Physics Institute told Spanish
international news agency EFE.
Chiapas’
Paleontology Museum director, Gerardo Carbot, dated the remarkable
fossil back 23 million years through an examination of the translucent,
honey-colored amber that encased it, EFE reports. The lizard is now on
display in Chiapas’ Amber Museum, located in nearby San Cristóbal de las
Casas.
As
the BBC notes, amber is formed when resin from a plant fossilizes after
becoming buried in sediment. The substance can be a gold mine for
archeologists and paleontologists.
In
large enough quantities, the viscous substance can trap small
creatures, insects and even types of fragile flowers. But even when this
does happen, to find a specimen this old with soft tissue remaining is
rare, according to the Associated Press.
The amber
of Simojovel has contained valuable samples in the past, according to
Popular Science — including a pair of fossilized flowers that will
be presented during this year’s international Botany Conference at the
end of July.
Some
of the most striking amber fossils discovered around the world in
recent months include a 100-million-year-old spider attack, and a trio
of 230-million-year-old insects discovered in Italy.
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