''Lygromma'' is a spider genus of Central and

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the Galapagos, while the distantly related blind ''L. gertschi'' is found only on

Jamaica Jamaica is an island country in the Caribbean Sea and the West Indies. At , it is the third-largest island—after Cuba and Hispaniola—of the Greater Antilles and the Caribbean. Jamaica lies about south of Cuba, west of Hispaniola (the is ...

. The Mexican genera '' Tivodrassus'' and '' Tricongius'' have been suggested as sister groups of ''Lygromma''. Species can reach a body length from about 2 to 4.6 mm.

Species

, the genus contains 19 species: * '' Lygromma anops'' Peck & Shear, 1987 — Galapagos Islands * '' Lygromma chamberlini'' Gertsch, 1941 — Panama, Colombia, Cuba * ''

Lygromma domingo ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' Platnick & Shadab, 1981 — Ecuador * '' Lygromma dybasi'' Platnick & Shadab, 1976 — Costa Rica, Panama * '' Lygromma gasnieri'' Brescovit & Höfer, 1993 — Brazil * '' Lygromma gertschi'' Platnick & Shadab, 1976 — Jamaica * '' Lygromma huberti'' Platnick & Shadab, 1976 — Venezuela, Brazil * ''

Lygromma kochalkai ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' Platnick & Shadab, 1976 — Colombia * ''

Lygromma nicolae ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' Víquez, 2020 – Costa Rica * '' Lygromma peckorum'' Platnick & Shadab, 1976 — Colombia * ''

Lygromma peruvianum ''Lygromma'' is a spider genus of Central America, Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The Blind spiders, eyeless ''L. anops'' is Endemism, endemic to the Galapag ...

'' Platnick & Shadab, 1976 — Peru * '' Lygromma quindio'' Platnick & Shadab, 1976 — Colombia * ''

Lygromma senoculatum ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' Simon, 1893 — Venezuela * ''

Lygromma simoni ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' (Berland, 1913) — Ecuador * ''

Lygromma taruma ''Lygromma'' is a spider genus of Central America, Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The Blind spiders, eyeless ''L. anops'' is Endemism, endemic to the Galapag ...

'' Brescovit & Bonaldo, 1998 — Brazil * ''

Lygromma tuxtla ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' Platnick, 1978 — Mexico * ''

Lygromma valencianum ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' Simon, 1893 — Venezuela * ''

Lygromma volcan ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' Platnick & Shadab, 1981 — Panama * ''

Lygromma wygodzinskyi ''Lygromma'' is a spider genus of Central and South America. There are species with eight, six (e.g. ''L. senoculatum'', ''L. valencianum'') and no eyes. The eyeless ''L. anops'' is endemic to the Galapagos, while the distantly related blind ' ...

'' Platnick, 1978 — Colombia

References

* Platnick, N.I. & Shadab, M.U. (1976). A revision of the spider genera ''Lygromma'' and ''Neozimiris'' (Araneae, Gnaphosidae). ''Amer. Mus. Novitates'' 2598:1-23
PDF (8Mb)

Abstract
(with key to species) * Platnick, N.I. (1977). Two new species of ''Lygromma'' (Araneae: Gnaphosidae). ''J. Arachnol.'' 5:151-152
PDF
(''L. tuxtla'', ''L. wygodzinskyi'') * Shear, W.A. & Peck, S.B. (1992). Male of the blind cave gnaphosoid ''Lygromma anops'' (Araneae, Gnaphosoidea, Prodidomidae) from Galapagos Islands, Ecuador. ''Journal of Arachnology'' 20:69-71
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{{Authority control Prodidominae Spiders of Mexico Spiders of Central America Spiders of South America Araneomorphae genera