Bertrana

Bertrana is a genus of Central and South American orb-weaver spiders first described by Eugen von Keyserling in 1884. It includes some of the smallest known araneid orb-weavers. Bertrana striolata females are 4.5 mm long or less. The eight eyes are in two rows. The abdomen is white on top and on the sides, with multiple hieroglyphic-like lines and bars of many different shapes and length. In females, these are red, in males, black.

Species
it contains twelve species:
 * Bertrana abbreviata (Keyserling, 1879) – Colombia
 * Bertrana arena Levi, 1989 – Costa Rica
 * Bertrana benuta Levi, 1994 – Colombia
 * Bertrana elinguis (Keyserling, 1883) – Ecuador, Peru, Brazil, French Guiana
 * Bertrana laselva Levi, 1989 – Costa Rica
 * Bertrana nancho Levi, 1989 – Peru
 * Bertrana planada Levi, 1989 – Colombia, Ecuador
 * Bertrana poa Levi, 1994 – Ecuador
 * Bertrana rufostriata Simon, 1893 – Venezuela, Brazil
 * Bertrana striolata Keyserling, 1884 – Costa Rica to Argentina
 * Bertrana urahua Levi, 1994 – Ecuador
 * Bertrana vella Levi, 1989 – Panama, Colombia