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== Taxonomy and naming ==
== Taxonomy and naming ==
''Atrax yorkmainorum'' is an Australian mygalomorph funnel-web spider, belonging to the family Atracidae. According to historical records, O. Pickard-Cambridge was the first individual to document Atrax as a genus in 1877 in ‘The Annals and Magazine of Natural History’ <ref>{{Cite web|title=ZooBank.org|url=http://www.zoobank.org/NomenclaturalActs/3e2d280d-19bb-4717-86d7-922a8b44ad23|access-date=2021-05-17|website=www.zoobank.org}}</ref>
''Atrax yorkmainorum'' is an Australian [[Mygalomorphae|mygalomorph]] funnel-web spider, belonging to the family [[Australian funnel-web spider|Atracidae]]. According to historical records, [[O. Pickard Cambridge|O. Pickard-Cambridge]] was the first individual to document Atrax as a genus in 1877 in ‘[[The Annals and Magazine of Natural History]]’ <ref>{{Cite web|title=ZooBank.org|url=http://www.zoobank.org/NomenclaturalActs/3e2d280d-19bb-4717-86d7-922a8b44ad23|access-date=2021-05-17|website=www.zoobank.org}}</ref>


The Atrax species ''yorkmainorum'' was first described in an Australian Museum review of funnel web spiders many years later in 2010<ref name="ausmus" />. Arachnologist, Professor Barbara York Main and her husband professor Bert Main of zoology made many contributions to the arachnology and zoology field, thus the species name ''‘yorkmainorum’'' was named after the couple<ref name="ausmus" />. After the death of Barbra York Main, many other genera of invertebrates were named after her<ref>{{Cite web|title=Professor Barbara York Main, OAM {{!}} Western Australian Museum|url=http://museum.wa.gov.au/explore/articles/professor-barbara-york-main|access-date=2021-05-17|website=museum.wa.gov.au|language=en}}</ref>
The Atrax species ''yorkmainorum'' was first described in an [[Australian Museum]] review of funnel web spiders many years later in 2010<ref name="ausmus" />. Arachnologist, Professor [[Barbara York Main]] and her husband professor [[Bert Main]] of zoology made many contributions to the [[arachnology]] and [[zoology]] field, thus the species name ''‘yorkmainorum’'' was named after the couple<ref name="ausmus" />. After the death of Barbra York Main, many other genera of invertebrates were named after her<ref>{{Cite web|title=Professor Barbara York Main, OAM {{!}} Western Australian Museum|url=http://museum.wa.gov.au/explore/articles/professor-barbara-york-main|access-date=2021-05-17|website=museum.wa.gov.au|language=en}}</ref>

== Description: appearance and body structure ==
The adult male of this spider species is reported to have an average body length between 16-17mm and average width of 7mm which includes the [[carapace]] (cephalothorax) and the abdomen, non-inclusive of legs<ref name="ausmus" />. The dorsal groove present in the centre of the carapace is narrow and bent in a forward direction with small, fine hairs on the anterior carapace<ref name="ausmus" />. The [[Sternum (arthropod anatomy)|sternum]] of the average male is 4.43mm in length and oval-shaped with strong posterior hairs<ref name="ausmus" />. Unlike spiders with long, slender legs such as the red back, ''Atrax yorkmainorum'' has wide legs averaging at 1.71mm with a length of 21.5mm.<ref name="ausmus" />

The female spider differs slightly in size, averaging at 18.84mm in body length and 7.5mm in body width<ref name="ausmus" />. The characteristics of the dorsal groove is identical to the male species, as is the sternum (4.59mm)<ref name="ausmus" />. The average length of female spider legs is approximately 18.7mm, the first and last pair being the longest for both sexes<ref name="ausmus" />. Each spider has a pair of venomous fangs (5mm) connected to the [[chelicerae]] on each side<ref>{{Citation|last=White|first=Julian|title=Australian Funnel Web Spiders|date=2017|url=http://dx.doi.org/10.1007/978-3-319-17900-1_105|work=Critical Care Toxicology|pages=2565–2576|place=Cham|publisher=Springer International Publishing|isbn=978-3-319-17899-8|access-date=2021-05-17}}</ref>. Both sexes have a deep dark brown or black appearance with a shiny body and matte abdomen<ref name="ausmus" /><ref>{{Cite web|title=Atrax yorkmainorum|url=https://arachnoboards.com/gallery/atrax-yorkmainorum.73918/|access-date=2021-05-17|website=Arachnoboards|language=en-US}}</ref>.

Features that distinguish ''Atrax yorkmainorum'' from ''[[Sydney funnel-web spider|Atrax robustus]]'' and ''[[Atrax sutherlandi]]'' is its slightly smaller size, absence of dorsal tibial spines on its pedipalp and the sleek, curved embolus on the male, as described by Michael, R Gray<ref name="ausmus" />


== References ==
== References ==

Revision as of 03:47, 17 May 2021

Atrax yorkmainorum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Mygalomorphae
Family: Atracidae
Genus: Atrax
Species:
A. yorkmainorum
Binomial name
Atrax yorkmainorum
Gray, 2010[1]

Atrax yorkmainorum is a species of Australian funnel-web spider in the family Atracidae, found in forests in the vicinity of Canberra and southeastern New South Wales. It was first described in 2010.[2]

Taxonomy and naming

Atrax yorkmainorum is an Australian mygalomorph funnel-web spider, belonging to the family Atracidae. According to historical records, O. Pickard-Cambridge was the first individual to document Atrax as a genus in 1877 in ‘The Annals and Magazine of Natural History[3]

The Atrax species yorkmainorum was first described in an Australian Museum review of funnel web spiders many years later in 2010[2]. Arachnologist, Professor Barbara York Main and her husband professor Bert Main of zoology made many contributions to the arachnology and zoology field, thus the species name ‘yorkmainorum’ was named after the couple[2]. After the death of Barbra York Main, many other genera of invertebrates were named after her[4]

Description: appearance and body structure

The adult male of this spider species is reported to have an average body length between 16-17mm and average width of 7mm which includes the carapace (cephalothorax) and the abdomen, non-inclusive of legs[2]. The dorsal groove present in the centre of the carapace is narrow and bent in a forward direction with small, fine hairs on the anterior carapace[2]. The sternum of the average male is 4.43mm in length and oval-shaped with strong posterior hairs[2]. Unlike spiders with long, slender legs such as the red back, Atrax yorkmainorum has wide legs averaging at 1.71mm with a length of 21.5mm.[2]

The female spider differs slightly in size, averaging at 18.84mm in body length and 7.5mm in body width[2]. The characteristics of the dorsal groove is identical to the male species, as is the sternum (4.59mm)[2]. The average length of female spider legs is approximately 18.7mm, the first and last pair being the longest for both sexes[2]. Each spider has a pair of venomous fangs (5mm) connected to the chelicerae on each side[5]. Both sexes have a deep dark brown or black appearance with a shiny body and matte abdomen[2][6].

Features that distinguish Atrax yorkmainorum from Atrax robustus and Atrax sutherlandi is its slightly smaller size, absence of dorsal tibial spines on its pedipalp and the sleek, curved embolus on the male, as described by Michael, R Gray[2]

References

  1. ^ "Taxon details Atrax yorkmainorum Gray, 2010". World Spider Catalog. Natural History Museum Bern. Retrieved 21 March 2017.
  2. ^ a b c d e f g h i j k l Gray, Michael R. (24 November 2010). "A revision of the Australian funnel-web spiders (Hexathelidae: Atracinae)" (PDF). Records of the Australian Museum. 62 (3): 285–392. doi:10.3853/j.0067-1975.62.2010.1556. ISSN 0067-1975.
  3. ^ "ZooBank.org". www.zoobank.org. Retrieved 17 May 2021.
  4. ^ "Professor Barbara York Main, OAM | Western Australian Museum". museum.wa.gov.au. Retrieved 17 May 2021.
  5. ^ White, Julian (2017), "Australian Funnel Web Spiders", Critical Care Toxicology, Cham: Springer International Publishing, pp. 2565–2576, ISBN 978-3-319-17899-8, retrieved 17 May 2021
  6. ^ "Atrax yorkmainorum". Arachnoboards. Retrieved 17 May 2021.