REDESCRIPTION OF THE ROOT-KNOT NEMATODE MELOIDOGYNE-MARITIMA JEPSON, 1987 (NEMATODA, HETERODERLDAE), A PARASITE OF AMMOPHILA-ARENARIA (L.) LINK

The root-knot nematode, Meloidogyne maritima, a parasite of marram gra ss (Ammophila arenaria), is redescribed from the type locality, a coas tal dune near Perranporth, UK. This species is characterized by second -stage juvenile 471 mu m long, hemizonid posterior to excretory pore, tail 71.5 mu m long, hyaline tail terminus indistinct; male head taper ing, not set off, labial disc elevated, rounded and fused with crescen t shaped medial lips, lateral lips present, stylet 20.5 mu m long, wit h relatively small rounded knobs, slightly sloping backwardly, lateral field areolated; female stylet curved dorsally, 14.2 mu m long, with rounded to transversely ovoid shaped knobs, slightly sloping backwardl y, excretory pore located near level of stylet knobs, perineal pattern relatively small, rounded to ovoid and dorsal arch low with lateral f ield distinct. A malate dehydrogenase pattern, N1a type, and a VS1-S1 type of esterase isozyme pattern were detected. Meloidogyne duytsi Kar ssen el al., 1998, was found on Elymus farctus in the foredunes of the type locality.