Moroccan Flic-flac Spider

Jäger describes C. rechenbergi as a medium-sized huntsman spider. Male bodies measure 13.8 to 19.0 mm (0.54 to 0.75 in) long; female bodies measure 19 to 19.5 mm (0.75 to 0.77 in) long. Males and females are similarly colored white with black scopulae on their ventral legs, and yellow coloring on their dorsal opisthosoma and femora.

C. rechenbergi lives in the sand dunes of the Erg Chebbi desert located in Errachidia Province in southeastern Morocco near the border with Algeria. It is one of 17 species in the genus Cebrennus, typically found in Northern Africa and the Arabian Peninsula.

The Moroccan flic-flac spider is nocturnal and is known to feed on moths before sunrise. It spends the hot desert days in its cool burrow in the sand protected from the sun and predators. The spider creates its dwelling with its pedipalps (feelers) and bristles, forming long, vertical tubes out of sand and silk. Using a series of rapid, acrobatic flic-flac movements of its legs similar to those used by gymnasts, the spider is able to actively propel itself off the ground, allowing it to move both down and uphill, even at a 40 percent incline. This behavior is different than other huntsman spiders, such as Carparachne aureoflava from the Namib Desert, which uses passive cartwheeling as a form of locomotion. The flic-flac spider can reach speeds of up to 2 m/s (i.e., slow human walking speed) using forward or back flips to evade threats.

The spider is named after its discoverer, Ingo Rechenberg, bionics professor at the Technische Universität Berlin. Rechenberg may have first encountered the spider on a trip to Morocco as early as 2006, but it was not until 2008 that he collected the first specimen. It was initially confused with the Tunisian spider Cebrennus villosus, but later identified as a separate species by Peter Jäger of the Senckenberg Nature Research Society. After observing small variations in the genitalia of the two species and noticing the distinctive flic-flac motion of the spider, Jäger confirmed its status as a new species. The holotype is dated 15 July 2009.