Axonchium amplicolle
Cobb, 1920
Photo Gallery- Konza Prairie

Lectotype (1 &):2 L-1.53 mm; w=.042 mm; e=.690 mm; t=.024 mm; a=36; b=2.2; c=64; V=57%; stylet not visible.

Paralectotypes (6 & &):  L=1.36-1.56 (1.47) mm; w=.037-.045 (.042) mm; e=.550-.690 (.650) mm; t=.018-.024 (.022) mm; a=33-36 (35); b=2.2-2.7 (2.3); c=62-82 (68); V=55-67 (57%); stylet=.009 mm (visible on one specimen only), extensions not visible.

Mauritius Specimens (2 & &):  L=1.85, 1.78 mm; w=.057, .057 mm; e=.810, .780 mm; t=.028, .028 mm; a=33, 31; b=2.3, 2.3; c=65, 63; V=52, 54%; stylet=.011 mm, extensions=.013 mm.

Female:  Head offset, anterior part of lips slightly offset by a depression.  Amphids almost as wide as constriction behind head.  Narrow anterior part of esophagus occupying 26 to 40% of total esophageal length.  Esophageal expansion truncate anteriorly, the two parts of the esophagus abutting, separated by a very narrow constriction.  Espophageal sheath muscle bands straight, not spiral.  Cardia 15 to 21 m long in paralectotypes, 19 m long in lectotype, 17 and 25 m long in speciments from Mauritius, about 1.5 times as long as its diameter.  Outer cuticle about 1 m thick, subcuticle slightly thicker at mid-body.  Vulva a crosswise slit, vaginal lument gradually becoming cross-shaped dorsally within sphincter.  Vaginal culticularization inconspicuous, thickening gradually toward sphincter, not offset from spinchter or body cuticle.  Anterior gonad an undifferentiated digitate pouch less than one body diameter long.  Posterior uterus short, with no narrow sinuous section, tapering gradually to the constriction proximal to the uterus expansion.  No sperm cells seen within the female reproductive system.  Tail tapering slightly to broadly rounded terminus.  One or two caudal pores present on each side of tail.  They are arranged in the same row with the lateral pores anterior to the anus, not paired side-by-side as illustrated by Cobb.  Prerectum 7 times as long as the anal body diameter in one paralectotypes, stricture difficult to locate in other specimens.
Males:  Unknown

Diagnosis-A. amplicolle is similar to A. mauritiense and A. amphidium.  It differs from A. mauritiense by having one caudal pore on each side of the tail, or tow arranged in the same row with the lateral pores anterior to the anus (five pores on each side in A. mauritiense), and from A. amphidium by the more narrow amphid.

Type Habitat and Locality:  Soil around the roots of Luca de Persia, imported to the United States from Rio de Janiero, Brazil.
Additional Locality Mauritius (specimens loaned by A.J. Ayala).
(Description- Hechler)