贝诺孢子虫属（学名：Besnoitia），又名必斯内虫属，是原生生物的一种，属于顶复动物门的一个属，是一种寄生性动物，会造成许多畜牲生病。

• Besnoitia bennetti
• 贝氏贝诺孢子虫 Besnoitia besnoiti
• Besnoitia darlingi
• Besnoitia jellisoni
• Besnoitia sauriana
• Besnoitia tarandi
• Besnoitia wallacei

Besnoitia is a genus of Apicomplexan protozoan parasite.

The life cycle of many of the species in this genus are not known. The life cycle may be complex with various intermediate hosts and vectors including Stomoxys and Tabanidae.