Oxytate

The genus Oxytate, commonly known as grass crab spiders,[1] comprises a homogenous group of nocturnal crab spiders.[2] The complete mitochondrial genome of the type species O. striatipes was determined in 2014.[3]

Grass crab spiders
A female green grass crab spider, O. argenteooculata, on a Cussonia leaf
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Arachnida
Order:
Araneae
Family:
Thomisidae
Genus:
Oxytate

L.Koch, 1878
Type species
O. striatipes L.Koch, 1878
Diversity
26 species
Synonyms
  • Dieta
Female O. hoshizuna in Okinawa, Japan
Female of the type species O. striatipes, on Hydrangea leaf, Japan

Habits

Like other crab spiders, they are masters of ambush and disguise.[1] They stalk their prey at night, from an ambush position on a grass stem or from the underside of a leaf. They can sense the vibrations caused by invertebrates moving on the leaf's upper side, and quickly pounce on the victim.[4] While in ambush on twigs or grass, the short hind legs hold onto the stem, while the long anterior legs are stretched forward.[1] Their bite is not harmful to humans, unless it would cause an allergic reaction.[5]

Anatomy
See also: Spider anatomy

Though they don't construct webs, both sexes possess a silk apparatus. A study of the type species, O. striatipes, revealed that they possess a simpler and more primitive spigot system than other wandering spiders, as even the females possess neither tubuliform glands for cocoon production, nor triad spigots for web-building. Males and females do however have three types of silk gland, which are classified as ampullate, pyriform and aciniform.[6]

Four ampullate glands are connected to the anterior spinnerets, while eight minor ampullate glands are connected to the median spinnerets. The pyriform glands are connected to the anterior spinnerets (90 in females and 80 in males). The aciniform glands are connected to the median (18–24 in females and 14–20 in males) and posterior spinnerets (60 in either sex).[6]

Range

They are native to Asia, West Australia, East, Central and southern Africa.[7]

Species
  • Oxytate argenteooculata (Simon, 1886) — Central, East, Southern Africa
  • Oxytate attenuata (Thorell, 1895) — Myanmar
  • Oxytate bhutanica Ono, 2001 — Bhutan, China
  • Oxytate capitulata Tang & Li, 2009 — China
  • Oxytate chlorion (Simon, 1906) — India
  • Oxytate clavulata Tang, Yin & Peng, 2008 — China
  • Oxytate concolor (Caporiacco, 1947) — Ethiopia
  • Oxytate elongata (Tikader, 1980) — India
  • Oxytate forcipata Zhang & Yin, 1998 — China
  • Oxytate greenae (Tikader, 1980) — Andaman Islands
  • Oxytate guangxiensis He & Hu, 1999 — China
  • Oxytate hoshizuna Ono, 1978 — China, Japan
  • Oxytate isolata (Hogg, 1914) — Western Australia
  • Oxytate jannonei (Caporiacco, 1940) — Ethiopia
  • Oxytate kanishkai (Gajbe, 2008) — India
  • Oxytate leruthi (Lessert, 1943) — West, Central Africa
  • Oxytate multa Tang & Li, 2010 — China
  • Oxytate parallela (Simon, 1880) — China, Korea
  • Oxytate phaenopomatiformis (Strand, 1907) — Zanzibar
  • Oxytate placentiformis Wang, Chen & Zhang, 2012 — China
  • Oxytate ribes (Jezequel, 1964) — Ivory Coast
  • Oxytate sangangensis Tang et al., 1999 — China
  • Oxytate striatipes L. Koch, 1878 — Russia, China, Korea, Taiwan, Japan
  • Oxytate subvirens (Strand, 1907) — Sri Lanka
  • Oxytate taprobane Benjamin, 2001 — Sri Lanka
  • Oxytate virens (Thorell, 1891) — Vietnam, Singapore
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See also
  • Runcinia, also known as grass crab spiders

References
  1. Larsen, Norman. "Family: Thomisidae (crab spiders)". Biodiversity Explorer. Iziko Museums. Retrieved 31 July 2015.
  2. Benjamin, Suresh P. (May 2001). "The genus Oxytate L. Koch 1878 from Sri Lanka, with description of Oxytate taprobane sp. n. (Araneae: Thomisidae)" (PDF). J. South Asian Nat. Hist. 5 (2): 153–158. Retrieved 31 July 2015.
  3. Kim, Ji Young; Yoo, Jung Sun; Park, Yung Chul (16 October 2014). "The complete mitochondrial genome of the green crab spider (Araneae: Thomisidae)". Mitochondrial DNA. 27 (3): 1878–9. doi:10.3109/19401736.2014.971268. PMID 25319303.
  4. Ono, H. (1978). "Thomisidae aus Japan II. Das Genus Oxytate L. Koch 1878 (Arachnida: Araneae)". Senckenbergiana Biol. (58): 245–521.
  5. "Grass crab spider". pest-control.com. 2011. Retrieved 3 August 2015.
  6. Moon, Myung-Jin; An, Jeong-Su (September 2006). "Microstructure of the silk spigots of the green crab spider Oxytate striatipes (Araneae: Thomisidae)". Entomological Research. 36 (3): 133–138. doi:10.1111/j.1748-5967.2006.00023.x.
  7. Ono, H. (1988). "A revisional study of the spider family Thomisidae (Arachnida, Araneae) of Japan". National Science Museum, Tokyo: 1–247.
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