Nigma

This article is about the spider. For the DC Comics supervillain, see Riddler. For the Cypriot cargo ship, see SS Nigma.

Nigma is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Pekka T. Lehtinen in 1967.^[2] They have a wide distribution, including Eurasia, North America, and Northern Africa.^[1] N. walckenaeri is one of the biggest members of the Dictynidae, growing up to 5 millimetres (0.20 in) long. They are translucent green and sometimes have red or black markings on the abdomen.^[3]

Nigma
N. walckenaeri
N. flavescens
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Araneae
Infraorder:	Araneomorphae
Family:	Dictynidae
Genus:	Nigma Lehtinen, 1967[1]
Type species
N. flavescens (Walckenaer, 1830)
Species
14, see text

Species

As of May 2019^[update] it contains fourteen species:^[1]

• 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