Pratylenchus alleni
Ferris, 1961
Photo Gallery- Konza Prairie
Photo Gallery- Homestead Nat'l Monument

Measurements (from Singh & Jain, 1984)
L = 0.57; a = 27.5; b = 6.1; c = 21.4; V = 78
L = 0.49; a = 30.6; b = 5.7; c = 21.3; T = 51

Description (from Singh & Jain, 1984)
    Body slightly curved ventrally, tapering anteriorly from the base of oesophagus and posteriorly behind vulva.  Cuticle finely annulated, annules 1.2-1.3 um apart at mid body.  Lateral fields 1/4th of body width, marked with 4 incisures, middle band being wider than the outer ones.  Head with 2 annules, bluntly rounded, continuous, 6-8 um wide and 2-3 um high.  Cephalic framework strongly sclerotized.  Spear moderately developed; metenchium slightly shorter or equal to telenchium; spear knobs flattened anteriorly, 3-4 um across.  Orifice of dorsal oesophageal gland 3 um from spear base.  Procorpus cylindrical, 33 (29-38) um long.  Median oesophageal bulb oval, 12-15 X 8.5-10 um.  Oesophageal glands overlap the intestine ventrally less than two body widths as a broad lobe.  Nerve ring 69 (61-72) um from anterior end.  Excretory pore placed at 88 (82-101) um from anterior end, anterior to oesophago-intestinal junction.  Hemizonid just anterior to excretory pore 2-3 annules wide.
    Vulva transverse.  Vagina 8 (7-9) um long and extends less than 1/2 vulva body width deep into body.  Reproductive system monodelphic, prodelphic, outstretched and may extend up to oesophageal gland lobe.  Oocytes arranged in a single row except at the anterior end.  Spermatheca spherical, filled with sperms.  Post-vulval uterine sac short, 18.6 (14-28) um or 0.7-1.5 vulval body widths long.  Vulva-anus distance 93 (78-108) um or 3-4 tail lengths.  Tail slightly conical, 27 (23-36) um long, with 18 (17-20) annules and a smooth rounded tail tip.  Phasmids in anterior half of the tail.
    Male: Similar to female except in tail shape.  Spermatocytes arranged in double or triple rows.  Tail terminus acute.  Bursa with crenate margins and envelopes the tail completely.  Spicules arcuate, cephalate.  Gubernaculum trough shaped.  Phasmids slightly posterior to middle of tail.
    Habitat: From the soil around the roots of chrysanthemum (Chrysanthemum) sp.).
    Locality: Chinhat, Lucknow, India.