Xenocriconemella macrodora
(Taylor, 1936) DeGrisse and Loof, 1965
Syn.:
 Criconemoides macrodorum Taylor, 1936
Criconemella macrodorus (Taylor) Luc & Raski, 1981
Criconema goffarti Volz, 1951
Criconemoides goffarti (Volz) Goodey, 1963
Criconemella goffarti (Volz) Siddiqi, 1986
Criconemoides juniperi Edward & Misra, 1964
Criconemella juniperi (Edward & Misra, 1964) Siddiqi, 1986
Photo Gallery- Remnant forest, Grinnell Iowa
Length, .27-.3 mm; a = 10-11.  Tail strongly convex conoid, terminus rounded.  Head of two annules, smaller than body annules and rounded instead of retrorse, but not otherwise set off.  Annules 106-110, sharply retrorse.  Portion of oesophagus anterior to middle bulb very long and thin.  Middle oesophageal bulb ellipsoidal, nearly filling body cavity.  Isthmus short.  Terminal bulb ellipsoidal, about 1/3 body width.  Nerve ring surrounding isthmus and anterior part of terminal bulb obliquely.  Stylet 110u long, extending through about 45 annules, this being about 40% of body length; very slender, curved and flexible enough to bend with movements of the body.  Three-lobed base rests at posterior portion of middle oesophageal bulb.  Forward pointing processes of lobes not conspicuous. Details of intestine obscure.  Anus at 10 annule in front of terminus.  Vulva a transverse slit at 11th annule in front of terminus.  Vagina extending inward and forward half across body.  Uterus about 2 body widths long and 1/3 as wide.  Ovary tapering to blind end, which is often in front of middle oesophageal bulb and is sometimes reflexed.  Excretory pore at about 40th annule.  Male unknown, none among 60 specimens.
Habitat:  In small numbers in leaf mould from woods near Alexandria, Virginia, U.S.A.
(Description- Taylor, 1936)

Measurements (14 Females):  L = 268 um (238-311); stylet = 96 um (82-105); V = 91.3% (89.9-92.1); Rv = 13 (11-14); R = 105 (101-111); Rex = ?
Associated plants and localities:   Soil around roots of Quercus velutina in the Donnelson Unit of the Shimek State Forest, Iowa; Quercus alba in the Wapello State Park, Iowa; Pinus strobus in White Pine Hollow, Luxemborg, Iowa; and Quercus alba in Pammel Woods, Ames, Iowa.
This species has been well-documented throughout the United States (Raski and Golden, 1965).  The specimens from Iowa agree closely with the original description.
The best features to identify Criconemoides macrodorum are the long stylet, which extends through 30 to 40% of the body length, the two narrow offset head annules, and the short body length.
(Description- Hoffman, 1974)