Deleterious Effect of the Melanotic Tumour on the Survival Rate of Drosophila melanogaster Female Flies Experimental horizontal transfer of phage derived genes to Drosophila confers innate immunity to parasitoids: Current Biology Haemocytemediated immunity in insects: Cells, processes and associated components in the fight against pathogens and parasites Eleftherianos 2021 Immunology Wiley Online Library An acral nevus is a benign melanocytic lesion found on the palms and soles. Dermoscopically, it most commonly shows the parallel furrow pattern, where pigmentation follows the furrows of the skin markings.