Diamesus osculans, is a species of carrion beetle found in Sri Lanka, Indonesia, Philippines, Laos,[1] China, Australia.

[2][3][4][5] It is the largest species carrion beetle in the subfamily Silphinae which is commonly found on decaying corpse with forensic value.

Adults can be easily attracted by light trap and animal remains.

[6] In 2020, the complete mitochondrial genome of the species was assembled.

It comprised with 19,398 base pairs in length with a total of 22 tRNA genes, 2 rRNA, and 13 protein-coding genes (PCG).