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28/04/2014 - The Moroccan Flic-Flac Spider: a Gymnast among the Arachnids

Frankfurt, 28.04.2014. 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.

Die Flick-Flack-Spinne Cebrennus rechenbergi in Aktion © Prof. Dr. Rechenberg
The flic-flac spider Cebrennus rechenbergi in action 
© Prof. Dr. Rechenberg

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.

Freigelegt: Röhrenartige Behausung der Flick-Flack-Spinne Cebrennus rechenbergi © Prof. Dr. Rechenberg
Exposed: the tube-like home of the
flick-flac spider: Cebrennus rechenbergi
© Prof. Dr. Rechenberg

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.

Die Flick-Flack-Spinne Cebrennus rechenbergi  in ihrer Behausung © Prof. Dr. Rechenberg
Die The flic-flac spider Cebrennus rechenbergi
in its domicile © Prof. Dr. Rechenberg

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.”

Dr. Peter Jäger
Senckenberg Research Institute
Department Arachnology
Phone 069 75421340

Ilona Bröhl / Judith Jördens
Press Office
Senckenberg Gesellschaft für Naturforschung
Phone 069- 7542 1434

Jäger, Peter: 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, [S.l.], v. 3790, n. 2, p. 319–356, http://biotaxa.org/Zootaxa/article/view/zootaxa.3790.2.4



Die Flick-Flack-Spinne Cebrennus rechenbergi © Prof. Dr. Rechenberg
The flic-flac spider Cebrennus rechenbergi
© Prof. Dr. Rechenberg

Modell des 25cm großen Spinnenroboters Tabbot © Prof. Dr. Rechenberg
A model of the spider robot Tabbot (size: 25cm)
© Prof. Dr. Rechenberg







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To study and understand nature with its limitless diversity of living creatures and to preserve and manage it in a sustainable fashion as the basis of life for future generations – this has been the goal of the Senckenberg Nature Research Society (Senckenberg Gesellschaft für Naturforschung) for almost 200 years. Through its exhibits and museums Senckenberg showcases and shares the current results of its natural history research with the public and offers insights into the past and present changes in nature, their causes and effects. Additional information is available at www.senckenberg.de.

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