Phymonotus jacintotopos, or San Jacinto shieldback, is a rare species of shieldback katydid endemic to the San Jacinto Mountains of southern California.[1] It has a distinct red-and-black coloration not found in similar katydids.
Phymonotus jacintotopos is endemic to the San Jacinto Mountains of southern California, the highest section of the Baja California Peninsular Ranges extending to the south. It inhabits high elevation mixed conifer forests consisting mainly of Jeffrey pine, Ponderosa pine, White fir, and California incense cedar, occurring above elevation up to at least .[2] It is reported as especially common near the community of Fern Valley on the western slopes of the mountain range.