|Criconema limitaneum Luc,
Criconemoides limitaneus (Luc) Luc & de Guiran, 1960
Neocriconema limitaneum (Luc) Diab & Jenkins, 1965
Mesocriconema limitaneum (Luc) Andrássy, 1965
Discocriconemella barberi Chawla & Samathanam, 1980
Discocriconemella repleta Pinochet & Raski, 1976
Photo Gallery- Las Cruces Biological station, Costa Rica
Holotype (female): L = .27 mm; a = 8; b = 3.1; c = 21;
V = 94; stylet = 66 um; prorhabdion = 56 um; R = 107;
Rv = 10; Ran = 7; Rvan
Female body plump; curved ventrally after fixation. Head set off, with single annule nonretrose. Body annules retrose except for the 7th to 17th on ventral side. Anastomoses present. Annules with crenated margins, 4-5 um wide. Head in en face view of paratype disc-shaped. Stylet robust; knobs anchor-shaped, 7-9 um across. Esophago-intestinal valve lobate. Spermatheca ovoid. Sperm cells 1-2 um in diameter. Body diameter distinctly narrows immediately posterior to vulva. Tail blunt with rounded terminus.
Allotype (male): L = .32 mm; a = 17; c = 21; T =
42; spicules = 25 um; gubernaculum = 5 um.
Body cylindrical. Cephalic region with round protrusion at oral aperture which appears to be an artifact. Stylet absent. Esophagus poorly developed. Lateral field with two faint lines. Excretory pore 99 um from head region; hemizonid four annules anterior to excretory pore. Testis out-stretched; sperm cells about 1.0 - 1.5 um in diameter. Cloacal sheath distinct. Spicules curved ventrad. Caudal alae rudimentary. Tail short, blunt with rounded terminus.
Juveniles ( 3 fourth stage ?); L = .21 mm ( .20 - .22); a = 6;
b = 2.5 ( 2.3-2.8); stylet = 46 um (42-48); prorhabdion = 37 um
(33-39); R = 116 (113-120).
Body plump; curved ventally after fixation. Head similar to adult female. Body annules retrose except for 5th to approximately 15th on ventral side. Anastomoses present. Annules smooth throughout body. Stylet robust with anchor-shaped knobs, 7-8 um across. Developing ovary 72-80 um long. Tail bluntly conoid.
Type habitat and locality: Soil about the roots of cacao, Theobroma cacao L., at Pauso Alegre, Porto Seguro, Brazil.
Diagnosis: Discocriconemella repleta is closely
related to D. colbrani Luc, 1970 and D. limitanea (Luc, 1959)
De Grisse & Loof, 1965. It can be differentiated from D. colbrani
by its larger number of body annules, 110 (107-116) vs. 79 (76-82); greater
Rv, 11 (10-12) vs 6-8; and the location of excretory
pore, (Rex), 39 (37-42) vs 27-28 for D. colbrani.
D. repleta differs from D. limitanea by its larger stylet, 62 um (59-66) vs. 48-55 um. Another population of 20 females measured by M. Luc showed a stylet length of 43 um (38-50). Males of these two species also differ. D. repleta has a shorter tail and a rudimentary bursa vs. longer tail and absence of bursa in D. limitanea.
(Description [Discrocriconemella repleta] Pinochet & Raski, 1976)
This species included in the Criconematid Project