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Dwarf sheet spiders (Hahniidae) is a family of araneomorph spiders, first described by Philipp Bertkau in 1878.[1]
| Dwarf sheet spiders Temporal range: | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Arachnida |
| Order: | Araneae |
| Infraorder: | Araneomorphae |
| Family: | Hahniidae Bertkau, 1878 |
| Diversity | |
| 29 genera, 240 species | |
 | |
Their bodies are about 2 millimetres (0.079 in) long, and they build extremely delicate webs in the form of a sheet that 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 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.[2] 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.[2]
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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 southeast Asia, although quite a number seem to be yet undescribed.[2]
The family is named after the type genus Hahnia, which is dedicated to German zoologist Carl Wilhelm Hahn.[1]
As of November 2024[update], the World Spider Catalog accepts the following genera:[3]
- Alistra Thorell, 1894 — Oceania, Asia
- Amaloxenops Schiapelli & Gerschman, 1958 — Argentina
- Antistea Simon, 1898 — North America, Asia
- Asiohahnia Ovtchinnikov, 1992 — Kazakhstan, Kyrgyzstan, China
- Austrohahnia Mello-Leitão, 1942 — Argentina
- Chorizomma Simon, 1872 — Spain, France
- Cicurina Menge, 1871 — North America, Asia
- Cybaeolus Simon, 1884 — Chile, Argentina
- Goblinia Lin & Li, 2023 — China
- Hahnia C. L. Koch, 1841 — Africa, Asia, North America, Central America, Europe, South America
- Hahniharmia Wunderlich, 2004 — Europe
- Harmiella Brignoli, 1979 — Brazil
- Hexamatia Rivera-Quiroz, Petcharad & Miller, 2020 — China, Thailand
- Iberina Simon, 1881 — Asia, Europe
- Intihuatana Lehtinen, 1967 — Argentina
- Kapanga Forster, 1970 — New Zealand
- Kasha Dupérré & Tapia, 2024 — Ecuador
- Lizarba Roth, 1967 — Brazil
- Myahnia Lin & Li, 2023 — Myanmar
- Mastigusa Menge, 1854 — France, Hungary
- Neoantistea Gertsch, 1934 — North America, Asia, Costa Rica
- Neoaviola Butler, 1929 — Australia
- Neohahnia Mello-Leitão, 1917 — South America, Saint Vincent and the Grenadines
- Pacifantistea Marusik, 2011 — Russia, Japan
- Paramito Dupérré & Tapia, 2024 — Ecuador
- Porioides Forster, 1989 — New Zealand
- Pristirana Dupérré & Tapia, 2024 — Ecuador
- Rinawa Forster, 1970 — New Zealand
- Scotospilus Simon, 1886 — Australia, New Zealand, India
- Sinahahnia Wang & Zhang, 2024 — China
- Troglohnia Lin & Li, 2023 — China
- Typhlohnia Lin & Li, 2023 — China, Laos, and Vietnam
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