Holwaya is a genus of fungi in the family Bulgariaceae. Holwaya is monotypic, containing the single species Holwaya mucida, which was originally named Bulgaria ophiobolus by Job Bicknell Ellis in 1883, and later transferred to the newly created Holwaya by Pier Andrea Saccardo in 1889. Holwaya mucida has an anamorph known as Crinula caliciiformis.