(A) Pristionchus adult female or hermaphrodite from rotting apple O824 from Orsay. The cuticle with longitudinal ridges and the pore-shaped vulva (arrowhead) are characteristic of Pristionchus. Bar: 100 μm. (B) Apple O1194 in Orsay orchard, France with large (>1,000 individuals) populations including feeding individuals of Pristionchus sp. and Caenorhabditis elegans. (C) Pear CZ12 in Prague, Czech Republic with Pristionchus and Panagrellus. (D) Olives F8 near Firenze, Italy with Pristionchus sp. (E) Arum stem B09-6 in a wood near Le Blanc, France with Pristionchus and Caenorhabditis. (F) Stem S156 in a wood near Santeuil, France with a feeding population of several thousand Pristionchus individuals. (G) Banana pseudostem S9 in Palermo Botanical Garden, Italy, yielding Pristionchus and C. elegans.