Description

Electrocteniza is a genus of spider that includes only one known species, Electrocteniza sadilenkoi. This genus is exclusively found in the Early Eocene Baltic amber deposits within the Baltic Sea region of Europe. Electrocteniza sadilenkoi measures 5.88 millimeters (0.231 inches) in length when considering the chelicerae. Of this length, the carapace accounts for 2.63 millimeters (0.104 inches), and the abdomen measures 2.50 millimeters (0.098 inches).

The carapace of Electrocteniza exhibits structural features that suggest a close relationship with modern genera such as Latouchia from Asia and Sterrochrotus (which is a synonym of Cteniza) from South Africa. However, there are several distinctions between these genera. In particular, Electrocteniza has an eye tubercle that is elevated more than in Latouchia and Sterrochrotus. Unlike contemporary genera of Ctenizidae, Electrocteniza lacks spines on the tibiae, metatarsi, and tarsi of legs I and II. Additionally, its chelicerae lack a rastellum.

Feeding habits

Similar to other trapdoor spiders, Electrocteniza likely created a burrow, either by lining an existing crevice with silk or by digging into soft soil. It would then seal this burrow with a hinged door. When insects ventured near the entrance, the spider would swiftly emerge from its lair, seize the insect, and deliver a bite before dragging its prey inside.

It's worth noting that Electrocteniza was named at the same time as another genus of trapdoor spider known as Baltocteniza. Electrocteniza is distinguished by its raised eye tubercles.