Permarachne

Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Chelicerata
Classis: Arachnida
Ordo: †Uraraneida
Genus: Permarachne
Species: P. novokshonovi
Name

Permarachne Eskov & Selden, 2005

Type species: Permarachne novokshonovi Eskov & Selden, 2005
References

Eskov, K. Y. & P. A. Selden. 2005. First record of spiders from the Permian period (Araneae: Mesothelae). Bulletin of the British Arachnological Society 13: 111–116. PDF [113]

Permarachne is an extinct genus of arachnids containing the single species Permarachne novokshonovi from the Permian (Kungurian) of Russia, found in the Koshelevka Formation near the town of Suksun in Perm Krai. It is closely related to modern spiders but unlike them, it has a long thin tail, similar to its relative Attercopus, it is known from the mostly complete holotype PIN 4909/12.[1] It is about 1 cm in size. It initially was thought to be a spider, but is now thought to form a clade with at least its close relative Attercopus, forming the grouping Uraraneida.[2]
References

Selden, P. A.; Eskov, K. Y. (2005). "First record of spiders from the Permian period (Araneae: Mesothelae)". Bulletin of the British Arachnological Society. 13 (4): 111–116.
Selden, P. A.; Shear, W. A.; Sutton, M. D. (2008). "Fossil evidence for the origin of spider spinnerets, and a proposed arachnid order". Proceedings of the National Academy of Sciences. 105 (52): 20781–20785. doi:10.1073/pnas.0809174106. ISSN 0027-8424. PMC 2634869. PMID 19104044.