Dwarf sheet spider

The dwarf sheet spiders (family Hahniidae) are small spiders, their bodies are about 2 mm in length. They build extremely delicate webs in the form of a sheet, and unlike many spiders the web does not lead to a retreat. The silk used in these webs is so fine that they are difficult to spot unless they are coated with dew. They greatly favor locations near water or near moss, and are often found in leaf litter and detritus or on the leaves of shrubs and trees.

Description

They are characterized by the arrangement of their six spinnerets in a transverse row. The last segment of the outer spinnerets is quite long and stands out above all the others.

Distribution

Hahniidae are a worldwide family. The genera of the Northern Hemisphere and Africa tend to differ in their genital structures from those of the Southern Hemisphere. Very few species have been described from south east Asia, although quite a number seems to be yet undescribed.

Name

The family is named after the type genus Hahnia, which is dedicated to German zoologist Carl Wilhelm Hahn.

Genera

Alistra Thorell, 1894 — Oceania, Philippines, Sumatra, Sri Lanka
Amaloxenops Schiapelli & Gerschman, 1958 — Argentina
Antistea Simon, 1898 — North America, Europe, Russia
Asiohahnia Ovtchinnikov, 1992 — Kazakhstan, Kirgizistan
Austrohahnia Mello-Leitão, 1942 — Argentina
Calymmaria Chamberlin & Ivie, 1937 — Mexico to Canada
Cryphoeca Thorell, 1870 — Palearctic
Cryphoecina Deltshev, 1997 — Montenegro
Cybaeolus Simon, 1884 — Chile, Argentina
Dirksia Chamberlin & Ivie, 1942 — United States, Alaska, France
Ethobuella Chamberlin & Ivie, 1937 — North America
Hahnia C. L. Koch, 1841 — America, Africa, Europe, Asia
Harmiella Brignoli, 1979 — Brazil
Iberina Simon, 1881 — Russia, France
Intihuatana Lehtinen, 1967 — Argentina
Kapanga Forster, 1970 — New Zealand
Lizarba Roth, 1967 — Brazil
Neoantistea Gertsch, 1934 — Canada to Costa Rica, Russia, Asia
Neoaviola Butler, 1929 — Australia
Neocryphoeca Roth, 1970 — USA
Neohahnia Mello-Leitão, 1917 — South America
Pacifantistea Marusik, 2011 — Kuril Islands
Porioides Forster, 1989 — New Zealand
Rinawa Forster, 1970 — New Zealand
Scotospilus Simon, 1886 — Tasmania, New Zealand, India
Tuberta Simon, 1884 — Europe to Azerbaijan
Willisus Roth, 1981 — USA
^ Marusik 2011: 57

source - Wikipedia
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