''Acantholycosa spinembolus'' is a species of

wolf spider Wolf spiders are members of the family Lycosidae (). They are robust and agile hunters with excellent eyesight. They live mostly in solitude, hunt alone, and do not spin webs. Some are opportunistic hunters, pouncing upon prey as they find it or ...

s only known from the Kholzun Mountain Range in the

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...

n part of the Altai Mountains. This is a dark-coloured spider up to 7.5 mm in length. The carapace and

abdomen The abdomen (colloquially called the belly, tummy, midriff, tucky or stomach) is the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. The abdomen is the front part of the abdominal segment of the to ...

are plain and unmarked but the legs have distinctive pale rings. This species can only be distinguished from its closest congeners by details of the

genitalia A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction. The reproductive organs together constitute the reproductive system. In animals, the testis in the male, and the ovary in the female, a ...

References

* Lycosidae Spiders described in 2003 Spiders of Russia {{Lycosidae-stub