Three new species of free living nematodes for nematode fauna of Iran

Three unrecorded species of free-living nematodes, namely Chronogaster typica, Eutobrilus nothus and Thornenema baldum were collected from the rhizosphere of rice (Oryza sativa L.) in Guilan province of Iran, during 2014-2016. The Iranian population of Chronogaster typica is characterized by having 950-1350 μm long body, specified crystalloid bodies and vacuolated lateral glandular bodies (VLGB), two well-developed lines in lateral fields and 125 to 169 μm long tail with a blunt ventral mucro at terminus without any spines. The Iranian population of Eutobrilus nothus, is distinguished by having 1250-1700 μm long body, funnel shaped buccal cavity, a small prominent tooth in each overlapping pockets, the six echinate ampulla and a longer and thicker thorn in the center. The Iranian population of Thornenema baldum, is characterized by short (800-1010 μm) body length, distinct post-labial sclerotizations, set off and narrower lip region than rest of the body and presence of bulges exactly under the lip region in the tissues.