Tylolaimophorus pugio Sauer, 1968

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 : 334

publication ID

https://doi.org/ 10.11646/zootaxa.4755.2.7

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scientific name

Tylolaimophorus pugio Sauer, 1968


Tylolaimophorus pugio Sauer, 1968  

After Sauer (1968).


Holotype female: L = 1.15 mm; a = 28; b = 9.6; c = 46; V = 51.

17 paratype females: L = 1.04-1.46 mm; a = 26-37; b = 8.6-12.0; body width = (40) µm; spear = 12-13 µm; pharynx = (120) µm; tail = (30) µm; c = 33-46; c’ = (1.1); V = 48-57.

12 paratype males: L = 0.92-1.33 mm; a = 29-39; b = 8.3-11.1; body width = (32) µm; spear =? µm; pharynx = (115) µm; tail = (32) µm; c = 30-42; c’ = (1.2); spicules = 30-40 µm; gubernaculum = (8) µm.


Female. Body cylindrical, ventrally arcuate when relaxed. Lip region cap-like, offset by a depression. Oval amphid apertures situated in the depression setting off the lip region. Lip region hexagonal in face view due to a slight protrusion of the individual lip lobes. Cephalic papillae protruding slightly. Spear typical of the genus. Slender anterior part of the pharynx surrounded by the nerve ring posterior to its midpoint. Pyriform basal bulb with three prominent glands at its base. Vulva a small transverse slit near mid-body. Vagina with thick lining, extending nearly halfway into the body. Gonads paired, opposed, reflexed. Rectum with thick cuticular lining, about one-third as long as anal body diameter. Intestine not extending into the caudal cavity. Tail blunt, longer than anal body diameter, with a bluntly rounded terminus.

Male. Spicules stout, irregular in outline, cephalated, slightly arcuate. No conspicuous surrounding musculature. Gubernaculum a simple trough ridged between the spicules. A series of widely spaced ventromedian supplements, which are often poorly developed, beginning within range of the spicules. Usually, 4 to 7 supplements may be observed.


Tylolaimophorus pugio   has been differentiated from the closely related species, T. constrictus   , T. bulgaricus   , T. cylindricus   , and T. pileatus   . See T. constrictus   for more detailed discussion.


Described from the soil in a peach orchard, Boeill Creek, New South Wales, Australia ( Sauer 1968).


Royal British Columbia Museum - Herbarium