Tylenchorhynchus cylindricus

Contents

Rev 09/20/2008

Female: Body straight to slightly arcuate in fixed specimens, tapering at both ends, 0.65-0.99 mm long..  

Annules distinct, coarse, 2 µm wide near midbody.

Lateral fields not areolated, about 1/4 as wide as body behind neck region, marked by 4 incisures.  

Deirids absent; phasmids prominent in both sexes, anterior to middle of tail, in neotype female on 5th and 8th annules behind anus.  

Lip region hemispherical, offset, exhibiting 5 (rarely 4 or 6) annules; labial sclerotization prominent towards basal plate and cheilostom.  

Stylet well developed, with large anteriorly-cupped basal knobs; tapering portion being non-tubular and needle-like in its anterior two-fifths.  

Orifice of dorsal esophageal gland about 2 µm from spear base.  

Median esophageal bulb large, oval; basal bulb elongate-pyriform, with intestine joining its base slightly ventrally; esophago-intestinal valve (cardia) prominent.

Excretory pore near base of isthmus, just behind hemizonid which is 1-2 annules long.  

Sinuous, convoluted canals present in the intestinal region.

Ovaries outstretched with oocytes usually in single row.  

Spermathecae rounded, usually with sperm.   

Tail elongate-conoid, with unstriated, smoothly rounded distal end; intestine not extending into tail cavity.

Male: Body length 0.67-1.0 mm.

Abundant.  

Spicules about 22 µm long, slightly arcuate, with large ventral flanges distally.

Gubernaculum 12 µm long, protrusible, its distal half enlarged with raised sides, proximal end anteriorly curved or crescent-shaped.

[Ref: CIH Descriptions of Plant-parasitic Nematodes, Set 1, No. 7 (1972)]