''Nigma'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

cribellate Cribellum literally means "little sieve", and in biology the term generally applies to anatomical structures in the form of tiny perforated plates. In certain groups of diatoms it refers to microscopically punctured regions of the frustule, or ...

araneomorph The Araneomorphae (also called the Labidognatha or "true spiders") are an infraorder of spiders. They are distinguishable by chelicerae (fangs) that point diagonally forward and cross in a pinching action, in contrast to the Mygalomorphae (taran ...

spiders in the family

Dictynidae Dictynidae is a family of cribellate, hackled band-producing spiders first described by Octavius Pickard-Cambridge in 1871. Most build irregular webs on or near the ground, creating a tangle of silken fibers among several branches or stems of on ...

, and was first described by

Pekka T. Lehtinen Pekka T. Lehtinen (born 1934) is a Finnish arachnology, arachnologist and taxonomy (biology), taxonomist. He is known for his works in systematics and for the many expeditions in which he has participated. Biography Lehtinen was born on 5 April ...

in 1967. They have a wide distribution, including

Eurasia Eurasia ( , ) is a continental area on Earth, comprising all of Europe and Asia. According to some geographers, Physical geography, physiographically, Eurasia is a single supercontinent. The concept of Europe and Asia as distinct continents d ...

, North America, and

Northern Africa North Africa (sometimes Northern Africa) is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of t ...

. ''N. walckenaeri'' is one of the biggest members of the Dictynidae, growing up to long. They are translucent green and sometimes have red or black markings on the

abdomen The abdomen (colloquially called the gut, belly, tummy, midriff, tucky, or stomach) is the front part of the torso between the thorax (chest) and pelvis in humans and in other vertebrates. The area occupied by the abdomen is called the abdominal ...

Species

it contains fourteen species: *'' Nigma conducens'' ( O. Pickard-Cambridge, 1876) – North Africa *'' Nigma flavescens'' (Walckenaer, 1830) (

type Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * ...

) – Europe, Caucasus, Iran *'' Nigma gertschi'' (

Berland Berland is a surname. Notable people with the surname include: *André Berland (1940–2025), French historian and biographer *Bjørn Berland (born 1977), Norwegian footballer *Eliezer Berland (born 1937), Israeli Breslov rabbi *François Berléan ...

& 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 The Chamberlin is an electro-mechanical keyboard instrument that was a precursor to the Mellotron. It was developed and patented by the American inventor Harry Chamberlin from 1949 to 1956, when the first model was introduced. There are several ...

& 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

References

External links

Nigma
at

BugGuide BugGuide (or BugGuide.net) is a website and online community of naturalists, both amateur and professional, who share observations of arthropods such as insects, spiders, and other related creatures. The website consists of informational guide p ...

Araneomorphae genera Cosmopolitan spiders Dictynidae Taxa named by Pekka T. Lehtinen {{Dictynidae-stub