Hoffmann, 1974
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9 Mile Prairie, NE Holotype female Kalsow Prairie, IA |
(16 Female paratypes): L = 422 um (354-486); a = 9.1 (7.1 - 11.3); b = 4.2 (3.6 - 5.6); c = ?; stylet = 55 um (51 - 61);V = 92% (91 - 94); Rv = 9 (8 - 9); R = 93 (77 - 100); Rex = 26 (25-26); Ran = 6; Rvan = 2. [R = total number of annules (including head annules); Rv = number of annules from vulva to tail terminus; Rex = number of annules from anterior end to excretory pore; Ran = number of annules from anus to tail terminus; Rvan = number of annules between vulva and anus].
Description: Only females were found. The ventrally curved body is widest in the anterior one-third. The head is comprised of a single offset disk-shaped anteriorly directed annule. The head annule may be complete or discontinuous. Sublateral lobes are absent. The body annules are retrorse with smooth posterior edges and occasional anastomoses. A typical criconematoid esophagus is present. The tip of the single, outstretched ovary often extends anterior to the basal bulb. A spermatheca, usually containing sperm, is located in the anterior portion of the uterus. The anterior vulva lip is bilobed. The vagina is sigmoid and the vulva is open.
Type habitat and locality: Holotype-female collected 6 June 1970 in the Kalsow Prairie, Pocahontas Co., Iowa, near roots of unidentified grass.
Paratypes-16 females collected in the same habitat and locality as the holotype.
Specimens: Holotype on slide T-222t, 16 female paratypes on slides T-1525p to T-1532p, one female vulva view on slide T-1535p and two females en face view on slides Y-1533p and T-1534p, U.S. Department of Agriculture Nematode Collection, Beltsville, MD, USA.
Diagnosis: Discocriconemella inaratus is most closely related to D. glabrannulata De Grisse, 1967, D. macramphida De Grisse, 1967, and Criconemoides colbrani Luc, 1970. It differs from D. glabrannulata by having a longer stylet, longer length, broken head annules, and the sigmoid vagina. It differs from D. macramphida by having smaller amphids, longer body length, and a sigmoid vagina. It differs from C. colbrani by its longer length, sigmoid vagina, broken head annules, and bilobed anterior vulva lip. Criconemoides lamottei Luc, 1970 exhibits similar en face characteristics of the broken head annules, but differs from D. inaratus by having a conoid tail, a straight vagina, crenated body annules, and no bilobed anterior vulval lip.
Measurements of a second population (7 females): L = 427
um
(378 - 499); a = 10 (9.2 - 10.8); b = 4.2 (3.8 - 4.8); C = ?; stylet =
55 um (52 - 58); v = 93% (93 - 94);Rv = 8 (7 - 9); R = 90 (88 -
93); Rex = 25.
Habitat and locality: These specimens were collected from
soil around roots of Lathyrus venosus Muhl. in the Sheeder Prairie
in Guthrie Co., Iowa on 14 June 1971. They are in the nematode collection
of the Department of Botany and Plant Pathology, Iowa State Unversity,
Ames, Iowa.
(Description- Hoffmann, 1974)
This species included in the Criconematid Project
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