Description (from Loof, 1960)
Body rather slender in young females, fat in old ones. Cuticular annulation fairly conspicuous. Lateral field distinct, normally with 4-5, occasionally with 6 incisures.
Female: In young specimens the ovary extends over one-quarter of body length, in old ones over more than one-half. Spermatheca broadly oval to nearly round. Posterior uterine branch variable in length, sometimes reaching 50 um. In about 20% of the females examined (especially older ones) it carried a distinct rudimentary ovary. Tail tapering slightly, its length in young specimens 2-2.5 X, in old ones 1.5-2 X anal body diameter; tip broadly rounded, truncate or indented; in some specimens appearing weakly and irregularly annulated.
Intra-uterine eggs often contain embryos, as was noted already by Cobb (1920).
Male: Spicula very slender, shaft ventrally concave. Gonad extends over about one-half body length. Testis shorter than vas deferens. Bursal edge faintly crenate.
This species may be distinguished from P. loosi by the more prominent cuticular annulation, the slightly more anterior position of the vulva, the shape of the female tail, and perhaps by its shorter oesophagus and the length of the posterior uterine branch.
Tylenchus (Chitinotylenchus) sp. W. Schneider, 1938, is probably identical with this species, as Schneider himself has already suggested.
Distribution and host plants: A mainly tropical and subtropical species. Reported from Indonesia (Java: coffee, Zimmermann, 1898; Bally & Reydon, 1931; bamboo, Bally & Reydon, 1931; Indigofera endecaphylla, Bally 7 Reydon; Sumatra; Potamogeton sp. and Nitella sp., W. Schneider, 1938); West Indies (bluggoe banana, Cobb, 1919; mahogany, Cobb, 1920); Central America (abaca, Taylor & Loegering, 1953); California (Vitis vinifera, Steiner, 1927); Brasil (Musa sp., Rahm, 1928 and 1929); Philippines (abaca, Taylor & Loegering, 1953) and Japan (potato and sweet potato, Yokoo, 1956).
Description (from Sher & Allen, 1953)
Female: Lateral field marked by four incisures. Lip region slightly set off from body, rounded, bears two annules. Outer margins of heavily sclerotized labial framework extend into body about one body annule. Spear-guiding apparatus extends posteriorly from basal plate about three annules. Spear 18 um long, well developed, broadly rounded basal knobs. Dorsal esopheageal gland orifice about 2 um behind spear base. Hemizonid just anterior to excretory pore, about two body annules long. Ovary does not extend to esophageal gland, consisting of a single row of oocytes, except for double row near anterior end. Spermatheca oval. Cellular oviduct long, uterus short. Posterior uterine branch about one and a half times width of body at vulva. Phasmid slightly posterior to middle of tail. Four lateral lines extend past phasmid. Tail tapering, terminus rounded. No striations around terminus.
Male: Similar to female. Single outstretched testis does not extend to esophageal glands, spermatocytes in single or multiple rows. Phasmids slightly posterior to middle of tail, extend slightly into bursa.
Type host: Roots of coffee.
Type locality: Bangor, Indonesia.