Lacrain: the first antimicrobial peptide from the body extract of the Brazilian centipede Scolopendra viridicornis

•A new antimicrobial from the whole body extract of the Brazilian Chilopoda Scolopendra viridicornis is described.•Lacrain presents specific activity against Gram-negative bacteria.•Lacrain is a peptide with a sequence of 8 amino acid residues (RYPAVGYT) and a molecular mass of 925.5 Da.•This peptide does not show cytotoxic activity against human erythrocytes.•This new molecule is the first described peptide with antimicrobial activity from the body extract of a myriapod.