Descriptions of three new species of Chronogaster Cobb, 1913 [ Nematoda: Leptolaimidae]

Three new species of Chronogaster Cobb are described; two from Mexico and one from Poland. C. jankiewiczi sp. n. is distinguished by its short cephalic sensilla (1.6-3.2 µm), tail tip with a terminal, hook-like and ventrally curved mucro, two subdorsal spines almost the half length of mucro, absence of lateral longitudinal lines, and lack of vacuolated lateral glandular bodies. C. mexicana sp. n. is distinguished by sharply pointed tip of tail without mucro or spines, absence of lateral lines, and the presence of vacuolated lateral glandular bodies. C. polonica sp. n. is distinguished by its tail terminus with ventral claw-like mucro and distinctly swollen 4-6 terminal tail annules, absence of lateral lines, and presence of vacuolated lateral glandular bodies.