Tylolaimophorus kasbegi ( Eliashvili, 1986 ) Brzeski, 1994

Ghaderi, Reza, Asghari, Ramezan & Eskandari, Ali, 2020, Systematics of the genus Tylolaimophorus de Man, 1880 (Nematoda Diphtherophoridae), with description of T. minor (Thorne, 1939) Goodey, 1963 from Iran, Zootaxa 4755 (2), pp. 322-340 : 331

Tylolaimophorus kasbegi ( Eliashvili, 1986) Brzeski, 1994

After Eliashvili (1986)

MEASUREMENTS

Holotype female: L = 0.89 mm; a = 18; b = 7.1; spear = 15 µm; c = 25; V = 58.

2 paratype females: L = 0.81-0.89 mm; a = 18-19; b = 6.8-7.1; body width = (45) µm; spear = 13-15 µm; pharynx = (120) µm; tail = (35) µm; c = 24-25; c’ = (1.0); V = 58-59.

3 paratype males: L = 0.82-0.89 mm; a = 19; b = 6.5-7.1; body width = (45) µm; spear = 12-14 µm; pharynx = (125) µm; tail = (32) µm; c = 24-30; c’ = (0.8); spicules = 31-34 µm; gubernaculum = 12-13 µm.

DESCRIPTION

Female. Body cylindrical, ventrally bent. Body cavity filled with granular structures. Cuticle thin, with fine transverse striae. Lip region broadly rounded, not separated from the body contour. Spear typical of the genus, length equal to lip region width. Amphidial aperture ellipsoidal, barely discernable. Pharynx short; the basal bulb pyriform, 28-29 µm long. Vulva a transverse slit, vagina sclerotized. Ovaries paired, reflexed, oocytes arranged in one row. Tail short, broadly rounded, equal in length to anal body diameter.

Male. Similar to female, spear slightly shorter. Spicules curved, with a hook-shaped process at the proximal end. Gubernaculum simple, thin, one-third of spicule length. Copulatory musculature capsule distinct. Seven supplements present, anterior to the cloaca, but rudimentary and hardly distinguishable. A cuticular process in the form of a spine observed in the cloacal region of one specimen.

DIAGNOSIS AND RELATIONSHIPS

Tylolaimophorus kasbegi has been differentiated from T. minor and T. indicus in regard to having longer body (0.8- 0.9 vs 0.4-0.6 and 0.4-0.5 mm, respectively) and shorter tail (c = 24-25 vs 15-23 and 15-22) than both species, longer spear (13-15 vs 10-12) than T. minor , and longer spicules (31-34 vs 25 µm) than T. indicus .

DISTRIBUTION

Described from the rhizosphere of herbaceous plants in Kasbegi district, Georgia ( Eliashvili 1986).