Lygromma

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 L. gertschi is found only on Jamaica.

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 <small>Peck & Shear, 1987</small> — Galapagos Islands
• Lygromma chamberlini <small>Gertsch, 1941</small> — Panama, Colombia, Cuba
• Lygromma domingo <small>Platnick & Shadab, 1981</small> — Ecuador
• Lygromma dybasi <small>Platnick & Shadab, 1976</small> — Costa Rica, Panama
• Lygromma gasnieri <small>Brescovit & Höfer, 1993</small> — Brazil
• Lygromma gertschi <small>Platnick & Shadab, 1976</small> — Jamaica
• Lygromma huberti <small>Platnick & Shadab, 1976</small> — Venezuela, Brazil
• Lygromma kochalkai <small>Platnick & Shadab, 1976</small> — Colombia
• Lygromma nicolae <small>Víquez, 2020</small> – Costa Rica
• Lygromma peckorum <small>Platnick & Shadab, 1976</small> — Colombia
• Lygromma peruvianum <small>Platnick & Shadab, 1976</small> — Peru
• Lygromma quindio <small>Platnick & Shadab, 1976</small> — Colombia
• Lygromma senoculatum <small>Simon, 1893</small> — Venezuela
• Lygromma simoni <small>(Berland, 1913)</small> — Ecuador
• Lygromma taruma <small>Brescovit & Bonaldo, 1998</small> — Brazil
• Lygromma tuxtla <small>Platnick, 1978</small> — Mexico
• Lygromma valencianum <small>Simon, 1893</small> — Venezuela
• Lygromma volcan <small>Platnick & Shadab, 1981</small> — Panama
• Lygromma wygodzinskyi <small>Platnick, 1978</small> — 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. PDF