|Syn.:||H. schachtii f. solani
H. schachtii rostochiensis Kemner, 1929
H. schachtii O'Brien and Prentice, 1930
H. (Globodera) rostochiensis Wollenweber, 1923 (Skarbilovich, 1959)
Illustrated Key to Cysts
Measurements: 50 males
Length 1.08 mm (0.89-1.27); a = 27 (22-36); b = 5.9 (4.9-7.3); c = 267 (161-664); stylet 26 u (25-27); outlet of dorsal esophageal gland 6.4 u (5.3-7.0); spicules 35 u (32-39); gubernaculum 12 u (10-14); tail 4.4 u (1.7-6.7).
Description of males: Body slender, vermiform, tapering slightly at both extremities. Cuticle with prominent annulation; subcuticular annulation less distinct and occurring twice as often as on cuticle. Lateral field measuring 7.0 u (6.7-8.4) in width at midbody, with 4 equally spaced lines except at its beginning in anterior portion. About midway, body measures 39 u (31-46) in width. Head slightly set off, hemisperical, with six annules. Cephalic framework heavily sclerotized. Stylet very strong, with prominent knobs. Stylet guide seen anteriorly as the usual lyre-shaped structure with a ring at its base encircling the stylet; attached to the base of this lyre-shaped guide is a membranous, sleevelike extension of the guide reaching about half the length of the basal stylet shaft, ending in another ring encircling the stylet at that point. Anterior and posterior cephalids present. Median bulb ellipsoidal with its center located 99 u from anterior end. Excretory pore about two annules posterior to commonly distinct hemizonid. One testis. Spicules slightly arcuate, with tips rounded, unnotched. Tail short, variable in both length and shape.
Measurements: 50 second-stage larvae
Length 0.43 mm (0.37-0.47); a = 19 (16-23); b = 2.3 (2.2-2.5); c = 8 (7-9); stylet 22 u (21-23); outlet of dorsal esophageal gland 5.5 u (5.0-6.7); tail 51 u (44-57); hyaline tail terminal 24 u (18-30); caudal ratio A = 3.4 (2.8-4.4); caudal ratio B = 10.8 (5.5-17.0).
Description of second-stage larve:
Body tapering at both extemities but much more so posteriorly. Subcuticular annulation twice as frequent as on cuticle. Lateral field with four lines for most of body length, the outer two crenate but without aerolation. Body measures 23 u (19-26) at widest part. Head slightly set off, bearing five annules, and considerably wider at its base than in height, presenting a rounded though rather anteriorly flattened appearance. Cephalic framework heavily sclerotized. Stylet well-developed, with prominent knobs appearing in lateral view. Stylet guide as described above for males. Anterior and posterior cephalids present, located about as shown. Valvated median bulb prominent, ellipsoidal, with its center located 68 u (64-76) from anterior end. Isthmus and esophageal glands typical for the genus. Excretory pore posterior and almost adjacent to hemizonid. Genital primordium located slightly posterior to midbody and commonly consists of four cells. Tail tapering to small, rounded terminus. Phasmids generally difficult to see, located about halfway on tail.
Measurements: 50 cysts
Length (including neck) 0.68 mm (0.45-0.99); width 0.54 mm (0.25-0.81); L/W ratio = 1.27 (1.0-1.8); diameter, or longest axis of fenestra (A) 15 u (8-20); distance from anus to nearest edge of fenestra (B) = 68 u (29-116); B/A ratio (Granek's ratio) = 4.5 (2.0-7.0).
Description of cysts:
Cysts brown in color, ovate to spherical in shape, with protruding neck; circumfenestrate, abullate, and without the distinct "vulval bodies" commonly seen in white females. Fenestra much larger than the small but distinct, V-shaped anus. Cyst wall pattern basically as in female but often more prominent, and especially near midbody, tends to form wavy lines going latitudinally around body. Punctation generally present but variable in intensity and arrangement.
Measurements: 50 eggs
Length 105 u (5-115); width 45 u (42-48); L/W ratio = 2.3 (2.0-2.6). Egg shell hyaline, without visible markings.
Type habitat, host, and locality: Roots of potato (Solanum tuberosum) in Rostock, German Democratic Republic (East Germany).
(Description- Golden and Ellington, 1972)