معرفی یک جمعیت ناشناخته از جنس Amplimerlinius Siddiqi, 1976 (Nematoda: Dolichodoridae) از استان مازندران

A study was conducted in 2019 to investigate plant parasitic nematodes in some forests of Mazandaran province. Several soil and root samples were randomly collected from the rhizosphere of forest trees in this province. Nematodes were extracted using common methods in nematology. After fixing and transferring them to pure glycerin, permanent slides were prepared. An unknown population of the genus Amplimerlinius was recovered from the rhizosphere of alder tree in Dalikhani forest. Females of this population have six lines in the lateral field, head continuous with 6-7 annuli, weak cephalic framework, stylet 21-24 µm, distinct deirids, vulva with prominent double epiptygma, cylindrical tail with clavate end having 65-69 annuli, hyaline 8-11 µm and c΄=3.2-3.5. Males with hypoptygma, spicules 26 and the gubernaculum 12 µm long. Unknown population did not match to any of the reported species of this genus. This population is most similar to A. globigerus, A. paraglobigerus, A. magnicauda and A. planitierus. The species, A. globigerus with a sclerotized cephalic framework, lower c΄ index, longer esophagus length, sunken and indistinct epiptygma, less tail annuli and different b, c and c΄ indices in males, A. paraglobigerus with moderately refractive cephalic framework, more cephalic annuli number, less tail annuli and lower c΄ index, A. magnicauda with a much longer stylet and A. planitierus with slightly offset cephalic, sclerotized cephalic framework, less tail annuli and lower c΄ value and absence of males can be separated from the unknown population.