''Cyclocosmia'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
mygalomorph
The Mygalomorphae, or mygalomorphs, are an infraorder of spiders, and comprise one of three major groups of living spiders with over 3,000 species, found on all continents except Antarctica. Many members are known as trapdoor spiders due to t ...
trapdoor spiders in the family
Halonoproctidae, first described by
Anton Ausserer
Anton Ausserer (5 July 184320 July 1889)Maurer, Ferdinand: ''Nachruf an Dr. Anton Ausserer.'' Programm des kk. acad. Gymnasiums in Grätz. Graz 1890 was an Austrian natural history, naturalist specialising in spiders.Bonnet, Pierre: Bibliographi ...
in 1871.
Originally placed with the
Ctenizidae, when the family split in 2018, this genus was placed with the
Halonoproctidae as the
type genus
In biological taxonomy, the type genus (''genus typica'') is the genus which defines a biological family and the root of the family name.
Zoological nomenclature
According to the International Code of Zoological Nomenclature, "The name-bearin ...
.
The name is derived from the Greek "kyklos" (), meaning "circle", and "kosmeo" (), meaning "to adorn".
Description
These are trapdoor spiders, whose species are distinguished from each other by the pattern of the abdominal disk, the number of hairs on its seam, and the shape of the
spermatheca
The spermatheca (pronounced : spermathecae ), also called ''receptaculum seminis'' (: ''receptacula seminis''), is an organ of the female reproductive tract in insects, e.g. ants, bees, some molluscs, Oligochaeta worms and certain other in ...
e. They have abdomens that are abruptly truncated, ending in a hardened disc that is strengthened by a system of ribs and grooves. They use this to clog the entrance of their burrows when threatened,
a phenomenon called
phragmosis. The disks have strong spines around the edge, and they each have four
spinnerets
A spinneret is a silk-spinning organ of a spider or the larva of an insect. Some adult insects also have spinnerets, such as those borne on the forelegs of Embioptera. Spinnerets are usually on the underside of a spider's opisthosoma, and ar ...
just anterior to it. The posterior, retractable spinnerets are particularly large.
''C. ricketti'' females are long, with a disk diameter of . Their burrows are deep, and only the bottom portion of the burrow is silk lined.
Species
, it contains thirteen species:
*''
Cyclocosmia abramovi''
Sherwood, 2024 – Vietnam
*''
Cyclocosmia johndenveri''
Sherwood, Warhol & Bianco, 2025 – USA
*''
Cyclocosmia lannaensis''
Schwendinger, 2005 – China, Thailand
*''
Cyclocosmia latusicosta
''Cyclocosmia'' is a genus of mygalomorph trapdoor spiders in the family Halonoproctidae, first described by Anton Ausserer in 1871. Originally placed with the Ctenizidae, when the family split in 2018, this genus was placed with the Halonopro ...
''
Zhu, Zhang & Zhang, 2006 – China, Vietnam
*''
Cyclocosmia liui''
Xu, Xu & Li, 2017 – China
*''
Cyclocosmia loricata''
( C. L. Koch, 1842) – Mexico
*''
Cyclocosmia ricketti''
( Pocock, 1901) – China
*''
Cyclocosmia ruyi
''Cyclocosmia'' is a genus of Mygalomorphae, mygalomorph trapdoor spiders in the family Halonoproctidae, first described by Anton Ausserer in 1871. Originally placed with the Ctenizidae, when the family split in 2018, this genus was placed with t ...
''
Yu & F. Zhang, 2023 – China
*''
Cyclocosmia siamensis''
Schwendinger, 2005 – Thailand, Laos
*''
Cyclocosmia sublatusicosta
''Cyclocosmia'' is a genus of mygalomorph trapdoor spiders in the family Halonoproctidae, first described by Anton Ausserer in 1871. Originally placed with the Ctenizidae, when the family split in 2018, this genus was placed with the Halonopr ...
''
Yu & Zhang, 2018 – China
*''
Cyclocosmia subricketti
''Cyclocosmia'' is a genus of mygalomorph trapdoor spiders in the family Halonoproctidae, first described by Anton Ausserer in 1871. Originally placed with the Ctenizidae, when the family split in 2018, this genus was placed with the Halonopro ...
''
Yu & Zhang, 2018 – China
*''
Cyclocosmia torreya
''Cyclocosmia'' is a genus of mygalomorph trapdoor spiders in the family Halonoproctidae, first described by Anton Ausserer in 1871. Originally placed with the Ctenizidae, when the family split in 2018, this genus was placed with the Halonopro ...
''
Gertsch & Platnick, 1975 – USA
*''
Cyclocosmia truncata
''Cyclocosmia truncata'' is a species of cork-lid trapdoor spider in the family Halonoproctidae. It is found in the United States.
References
External links
*
Halonoproctidae
Articles created by Qbugbot
Spiders described in 1841
...
''
(Hentz, 1841) (
type
Type may refer to:
Science and technology Computing
* Typing, producing text via a keyboard, typewriter, etc.
* Data type, collection of values used for computations.
* File type
* TYPE (DOS command), a command to display contents of a file.
* ...
) – USA
References
Further reading
* (2005): Two new ''Cyclocosmia'' (Araneae: Ctenizidae) from Thailand. ''
Revue suisse de Zoologie
The ''Revue suisse de Zoologie'' (English: ''Swiss Journal of Zoology'') is a biannual peer-reviewed scientific journal for zoological systematics. It is published by the Natural History Museum of Geneva (Switzerland). It is financed by the Swis ...
'' 112(1): 225-252
External links
''Cyclocosmia''at Bugguide.net
''Cyclocosmia''close up
Halonoproctidae
Mygalomorphae genera
Spiders of Asia
Spiders of North America
Taxa named by Anton Ausserer
{{Halonoproctidae-stub