Nigma

Nigma is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Pekka T. Lehtinen in 1967. They have a wide distribution, including Eurasia, North America, and Northern Africa. N. walckenaeri is one of the biggest members of the Dictynidae, growing up to 5 mm long. They are translucent green and sometimes have red or black markings on the abdomen.

Species
it contains fourteen species:
 * Nigma conducens (O. Pickard-Cambridge, 1876) – North Africa
 * Nigma flavescens (Walckenaer, 1830) (type) – Europe, Caucasus, Iran
 * Nigma gertschi (Berland & Millot, 1940) – Senegal
 * Nigma gratiosa (Simon, 1881) – Portugal, Spain, North Africa
 * Nigma hortensis (Simon, 1870) – Portugal, Spain, France, Algeria
 * Nigma laeta (Spassky, 1952) – Azerbaijan, Iran, Tajikistan
 * Nigma linsdalei (Chamberlin & Gertsch, 1958) – USA
 * Nigma longipes (Berland, 1914) – East Africa
 * Nigma nangquianensis (Hu, 2001) – China
 * Nigma puella (Simon, 1870) – Europe, Azores, Madeira, Canary Is.
 * Nigma shiprai (Tikader, 1966) – India
 * Nigma tuberosa Wunderlich, 1987 – Canary Is.
 * Nigma vulnerata (Simon, 1914) – Mediterranean
 * Nigma walckenaeri (Roewer, 1951) – Europe, Turkey, Caucasus