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The Moroccan flic-flac spider: A gymnast among the arachnids

Date:
April 28, 2014
Source:
Senckenberg Research Institute and Natural History Museum
Summary:
A spider expert has described a new species: Cebrennus rechenbergi. It is the only spider that is able to move by means of flic-flac jumps. The flic-flac spider uses its legs to create a rolling motion. Like a gymnast, it propels itself off the ground, followed by a series of rapid flic-flac movements of its legs.

The flic-flac spider Cebrennus rechenbergi in action.
Credit: Prof. Dr. Rechenberg

Dr. Peter Jäger, spider expert at the Senckenberg Research Institute in Frankfurt, has described a new species: Cebrennus rechenbergi. It is the only spider that is able to move by means of flic-flac jumps. This new species was introduced in the scientific journal Zootaxa.

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The nocturnal spider Cebrennus rechenbergi lives in the sand desert Erg Chebbi in southeastern Morocco, not far from the Algerian border. With its feelers and specialized, elongated bristles, Cebrennus rechenbergi creates a tube-like domicile in the sand, attached by silk threads, which offers protection from the sun and predators. The spider's most outstanding talent, however, is its ability to move by means of flic-flac jumps. Unlike its relative from Namibia, the golden rolling spider, which is restricted to passively rolling down sand dunes, the flic-flac spider uses its legs to create a rolling motion. Like a gymnast, it propels itself off the ground, followed by a series of rapid flic-flac movements of its legs.

This gives the spider great flexibility -- uphill, downhill or on level ground, Cebrennus rechenbergi can move along with ease. It displays this behavior when provoked, e.g., by a congener, a camel spider, a scorpion or a human. At almost 2 meters per second, the flic-flac jumps allow the spider to move twice as fast as in simple walking mode.

A model for spider robots

Dr. Jäger named the flic-flac spider after the scientist Prof. Dr. Ingo Rechenberg from Berlin. The bionics expert discovered Cebrennus rechenbergi during an expedition in Morocco and passed it on to Dr. Jäger for taxonomic determination. Prof. Dr. Rechenberg was so inspired by the flic-flac spider's ingenious mode of locomotion that he developed a 25cm long model of a spider robot. The Tabbot, named after "Tabacha" (the word for spider in the Berber language), can move by walking as well as by turning somersaults. "This robot may be employed in agriculture, on the ocean floor or even on Mars," according to its inventor.

The first scientific description of a species of flic-flac spider

Through morphological examination, Dr. Peter Jäger was able to determine that the flic-flac spider really constitutes a new species. Based on minute differences in their sex organs, he was able to distinguish Cebrennus rechenbergi from the closely related species Cebrennus villosus in Tunisia. "However, the unique mode of locomotion also serves as a criterion to distinguish the species," says Dr. Jäger.

Taxonomic and systematic research forms the strongest core competence at the Senckenberg Research Institutes. New methods, such as genetic analyses, can be combined with traditional approaches and aid in the identification of new species. Dr. Peter Jäger explains, "It is our goal to record and preserve the diversity of all life on our planet, i.e., the biodiversity."


Story Source:

The above story is based on materials provided by Senckenberg Research Institute and Natural History Museum. Note: Materials may be edited for content and length.


Journal Reference:

  1. Peter Jäger. Cebrennus Simon, 1880 (Araneae: Sparassidae): a revisionary up-date with the description of four new species and an updated identification key for all species. Zootaxa, 2014; 3790 (2): 319 DOI: 10.11646/zootaxa.3790.2.4

Cite This Page:

Senckenberg Research Institute and Natural History Museum. "The Moroccan flic-flac spider: A gymnast among the arachnids." ScienceDaily. ScienceDaily, 28 April 2014. <www.sciencedaily.com/releases/2014/04/140428074422.htm>.
Senckenberg Research Institute and Natural History Museum. (2014, April 28). The Moroccan flic-flac spider: A gymnast among the arachnids. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2014/04/140428074422.htm
Senckenberg Research Institute and Natural History Museum. "The Moroccan flic-flac spider: A gymnast among the arachnids." ScienceDaily. www.sciencedaily.com/releases/2014/04/140428074422.htm (accessed November 28, 2014).

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