Three new arthropod species have been found in the Maestrazgo Caves in Teruel

Nov 27, 2012
This is the new species Pygmarrhopalites maestrazgoensis. Credit: Rafael Jordana; Enrique Barquero

A team of scientists from the University of Navarra and the Catalan Association of Biospeleology have discovered three new collembolan species in the Maestrazgo caves in Teruel, Spain. Their description has been published in the Zootaxa journal. These minute animals belong to one of the most ancient animal species on the planet.

The Maestrazgo in Teruel are located in a region of the Iberian Range where fauna has not been the subject of much study. It is a very isolated region since its average altitude is between 1,550 m and 2,000 m asl and its climate can be described as "almost extreme" experiencing temperatures of between -40°C and -25°C. Inside the caves, however, the temperatures remain constant at between 5°C and 11°C.

"Studying fauna in the caves allows us to expand on our knowledge of biodiversity. In the case of the three new collembolan species that we have found in Teruel, they are organisms that have survived totally isolated for thousands of years. Having 'relatives' on the surface means they act like relics from the past that have survived the taken place on the outside of the caves," as explained to SINC by Enrique Baquero, who carried out a taxonomic study along with Rafael Jordana, both of whom are from the University of Navarra.

This is the Espeologos team during the descent into the cave. Credit: Floren Fadrique

For these scientists it is vital to study how new species found adapt to the cave environments. "Like other cave-adapted animals, the collembolans require greater chemical sensitivity as they cannot use their sight in the absence of light", explains Baquero.

These animals are arthropods from the hexapod group (meaning six legs), a parallel group to insects. However, they are different and more primitive, showing absence of wings, different structure of their mouth, presence of the ventral organ and frequently, presence of the springing organ named the furca (an uneven abdomen appendix used to jump far away from danger).

Field work in extreme conditions

The three new species of collembolan documented in the investigation published in the journal belong to very different groups and are phylogenetically separate from one another. They have been named Pygmarrhopalites maestrazgoensis, P. cantavetulae and Oncopodura fadriquei. The researchers have also found specimens of five other in the caves that have already been documented in nearby and further away caves.

These animals were found by a team of speleologists headed by Floren Fadrique from the Catalan Association of Biospeleology. They entered different caves in harsh conditions of cold, humidity and darkness.

The expert concludes that "the animals were captured by laying down traps. These consisted of jars containing different liquids, which the approached in search of food. They were then trapped until the speleologists returned to collect them. Professor Jordana and I received the samples collected by the speleologists and proceeded to their identification."

Explore further: Syracuse biologist reveals how whales may 'sing' for their supper

More information: Rafael Jordana, Floren Fadrique, Enrique Barquero. "The collembolan fauna of Maestrazgo caves (Teruel, Spain) with description of three new species", Zootaxa 3502: 49 – 71, 2012.

add to favorites email to friend print save as pdf

Related Stories

World's first eyeless huntsman spider discovered

Aug 09, 2012

A scientist from the Senckenberg Research Institute in Frankfurt has discovered the first eyeless huntsman spider in the world. The accompanying study has been published by the scientific journal Zootaxa.

Delving into darkness to discover new species

Jul 30, 2012

(Phys.org) -- Deep in the recesses of a northwestern Arizona cave, a beetle scuttles along the floor, navigating its way with its long antennae as hair-like tufts on its slender legs drag across the rocks.

Recommended for you

Study shows starving mantis females attract more males

13 hours ago

A study done by Katherine Barry an evolutionary biologist with Macquarie University in Australia has led to the discovery that a certain species of female mantis attracts more males when starving, then do ...

African swine fever threatens Europe

14 hours ago

African swine fever, or ASF, is a viral disease that kills almost every pig it infects and is likened to Ebola. It gained a foothold in Georgia in 2007, when contaminated pig meat landed from a ship from ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.