1 literature reference for Sybra signata (Perroud, 1855):

Author: CHEMSAK J. A. & LINSLEY E. G.
Year: 1968
Title: New Species of Elaphidionini from Mexico (Coleoptera: Cerambycidae)
Source: The Pan-Pacific Entomologist, San Francisco 44 (1): 26-34, 6 figs.