Brief Summary

    Nemesiidae: Brief Summary
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    The Nemesiidae are a spider family of the infraorder Mygalomorphae. They were formerly considered part of the Dipluridae family.

    Brief Summary
    provided by EOL authors

    The mygalomorph spider family Nemesiidae includes 364 described species (Platnick 2013). The family has a worldwide distribution, but only five (at most) valid species occur in North America north of Mexico, all belonging in the genus Calisoga (Ubick and Ledford 2005). Of these North American species, according to Ubick and Ledford, Brachythele longitarsis and B. anomala clearly belong in the genus Calisoga but were never formally transferred to this genus. For this reason, Platnick still lists them in Brachythele and lists only three Calisoga species (C. centronetha, C. sacra, and C. theveneti—and Ubick and Ledford report that according to M.M. Bentzien in his unpublished 1976 Ph.D. thesis, "C. theveneti" are actually just very small C. longitarsis).

    Nemesiids resemble tarantulas (Theraphosidae), although they are generally smaller and more slightly built; close inspection reveals that they lack the conspicuous claw tufts at the tips of their legs that are evident in theraphosids and the tips of their tarsi bear three claws instead of the two present in theraphosids.

    Calisoga is known from northern and central California, with a single record from western Nevada. These spiders are found in a range of habitats, mainly oak grasslands, riparian areas, and coniferous forests, from near sea level to around 2300 m elevation, sometimes occurring even in urban areas. Calisoga live in burrows or in crevices in the ground which they line with silk and hide in as they wait for passing prey. Mature males leave their burrows to search for females and females are often flooded out of their burrows in the rainy season. Females place their egg sacs in their burrows. Calisoga sometimes enter human homes, where their large and hairy appearance, conspicuous threat display, and aggressive behavior can cause alarm, although they are not dangerous to humans. (Ubick and Ledford 2005; Bradley 2013)

    In Australia, nemesiids are known as wishbone spiders because they often build forked burrows with two openings at the soil surface that would resemble a wishbone if viewed in cross section (Main 1976 cited in Bradley 2013).

    Ubick and Ledford (2005) reviewed the taxonomic history of the small number of Nearctic nemesiids.

Comprehensive Description

    provided by wikipedia

    The Nemesiidae are a spider family of the infraorder Mygalomorphae.[1] They were formerly considered part of the Dipluridae family.[2]


    Nemesiidae are relatively large and robust spiders with robust legs.[3] Female Atmetochilus can grow over 4 cm in body length.

    These spiders live in burrows. Some finish these with a hinged door. They often push this door up and wait for passing prey. When they catch it they try not to leave their burrow. Sometimes a burrow has a side tube. It is not certain whether Sinopesa builds burrows.[4]


    Burrow of Nemesia cavicola
    Raveniola chayi, female

    See also


    1. ^ Raven, R.J. 1985. The spider Infraorder Mygalomorphae (Araneae): cladistics and systematics. Bulletin of the American Museum of Natural History 182: 1-180.
    2. ^ Platnick 2009
    3. ^ Find-a-spider Guide Archived 2006-07-07 at the Wayback Machine.
    4. ^ Murphy & Murphy 2000


    • Raven, R.J. (1985): The spider Infraorder Mygalomorphae (Araneae): cladistics and systematics. Bulletin of the American Museum of Natural History 182: 1-180.
    • Selden, P.A. (2001): Eocene spiders from the Isle of Wight with preserved respiratory structures. Palaeontology 44: 695-729. doi:10.1111/1475-4983.00199
    • Raven, R.J. (1987): A new mygalomorph spider genus from Mexico (Nemesiinae, Nemesiidae, Arachnida). J. Arachnol. 14: 357-362. PDF (Mexentypesa)
    • Pesarini, C. (1988): Revision of the genus Pycnothele (Araneae, Nemesiidae). J. Arachnol. 16: 281-293. PDF
    • Murphy, Frances & Murphy, John (2000): An Introduction to the Spiders of South East Asia. Malaysian Nature Society, Kuala Lumpur.
    • Rafael P. Indicatti & Sylvia M. Lucas (2005): Description of a new genus of Nemesiidae (Araneae, Mygalomorphae) from the Brazilian Cerrado. Zootaxa 1088: 11-16. PDF (Longistylus)
    • Indicatti, Rafael P.; Lucas, Sylvia M.; Ott, Ricardo & Brescovit, Antonio D. (2008): Litter dwelling mygalomorph spiders (Araneae: Microstigmatidae, Nemesiidae) from Araucaria forests in southern Brazil, with the description of five new species. Revista Brasileira de Zoologia 25(3): 529-546.
    • Platnick, Norman I. (2009): The world spider catalog, version 10.0. American Museum of Natural History.
    • Goloboff, Pablo A. (1995): A revision of the South American spiders of the family Nemesiidae (Araneae, Mygalomorphae). Part 1, Species from Peru, Chile, Argentina, and Uruguay. Bulletin of the AMNH 224.