But after closer inspection, Texas Tech University biologists discovered a new species found only on the Caribbean island and whose origins probably trace back to a dramatic marooning after glaciers receded and sea levels rose.
The discovery was made by Peter Larsen, a post-doctoral research associate in the Department of Biological Sciences, and Lizette Siles, graduate student of zoology. It was featured in the online version of the peer-reviewed journal, Mammalian Biology.
Researchers from the University of Scranton, South Dakota State University and the University of Nebraska also contributed to the discovery.
As a way of honoring St. Vincent’s inhabitants, the researchers said this new species of the genus Micronycteris has been named after the Garifuna people – the blended culture of Carib, Arawak and West African peoples that trace their ancestry back to St. Vincent.
Larsen said he went to St. Vincent in 2005-2006 on two expeditions with a team of researchers seeking to categorize bat diversity on the island.
“We didn’t know at the time when we caught these particular specimens that it was a new species,” he said. “We thought it was a species that had been described already in South America. A year or so went by, and I happened to look at this species that we had collected and compared it to what we thought it was – a species from Trinidad. But the St. Vincent bat was huge comparatively speaking.”
Larsen gave the sample to Siles, who is an expert in Neotropical bat morphology. After looking at the teeth and the skull, she determined the bat from St. Vincent was distinct from its closest South American relatives. Though the mainland relatives are smaller, often small animals grow larger and large animals grow smaller when introduced onto an island.
Siles said that though the island effects on the body size may have played a role in this example, the species on St. Vincent is genetically distinct and has species-level differences in body type, which is how the team determined that the bat was a new species to science.
“Its size was the first clue,” she said. “It’s a very large bat in body and skull size compared to its mainland counterparts. Also it differs in specific skull and teeth characteristics. The lower incisors are a lot larger than they are wide. That’s completely different than the one he thought it was. At the base of the skull where the ear is, there are supposed to be two wells. Those wells are very shallow. On the mainland species, they’re very deep.”
The new species came about fairly recently, the researchers said, probably sometime in the last 600,000 to 1 million years. Prior to this, the bat’s common ancestor from the South American mainland managed to island-hop across to St. Vincent when sea levels were much lower.
The marooning likely occurred during the Pleistocene, after melting glaciers caused rising sea levels that isolated the St. Vincent population.
Siles said the bat is mainly an insect eater that will roost in caves, trees and even logs on the forest floor.
However, the animal has an uncommon method for catching prey, she said.
“They can actually pick their insect prey off the surface of rocks and leaves,” Siles said. “Not all insectivores can do that, because most insectivores catch their prey on the fly. Their big ears, wide wings and membranes between the rear feet and tail allow them to maneuver better.”
To see the report, visit this site.
Find Texas Tech news, experts and story ideas at www.media.ttu.edu and on Twitter @TexasTechMedia.
CONTACT: Peter Larsen, post-doctoral research associate, Department of Biological Sciences, Texas Tech University, (806) 742-3722 ext. 283 or email@example.com; Lizette Siles, graduate student of zoology, Natural Science Research Laboratory, Texas Tech University, firstname.lastname@example.org.
John Davis | Newswise Science News
Could this protein protect people against coronary artery disease?
17.11.2017 | University of North Carolina Health Care
Microbial resident enables beetles to feed on a leafy diet
17.11.2017 | Max-Planck-Institut für chemische Ökologie
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses