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What is the anal groove used for in tick identification?

The shape and position of the anal groove is one character specialists use when separating tick groups.

Reviewed by VuxLore® Knowledge Team For People

What is the anal groove used for in tick identification?

Short answer

The shape and position of the anal groove is one character specialists use when separating tick groups.

At a glance

A public-domain ventral close-up showing a diagnostic structure that is normally invisible in casual photographs.

Key takeaways

• Underside characters can be important

• Do not force or damage a specimen to obtain a view

• Specialist identification uses multiple features

An underside identification character

This close-up highlights an anal groove. Its position relative to the anal opening can assist taxonomic identification when viewed with other structures.

Sources and further reading

US Centers for Disease Control and Prevention: DPDx: Ticks

US Centers for Disease Control and Prevention: About Ticks and Tickborne Disease