What is this organ within the body of male Ornithodoros soft tick?

Asadollah Hosseini Chegeni @Asadollah-Hosseini-Chegeni

26 July 2016 1 4K Report

What is this organ within the body of male Ornithodoros soft tick? The organ contain huge bead like crystalline particles. I think this is rectum or an organ responsible for excretion of uric acid!

Matt Colloff

Dear Asadolla,

The structures looks like the diverticula (or caecae) of the midgut. Nitrogenous waste in ticks is in the form of guanine crystals rather than uric acid. Have a look at Daniel E. Sonenshine & ‎R. Michael Roe (2013) Biology of Ticks Vol. 1. It is available on Google Books.

Cheers,

Matt

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