Nannolaimoides decoratus

Nannolaimoides decoratus	Contents	Rev: 08/26/2025
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
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Chromadorida

Chromadorina

Chromadoroidea

Cyatholaimidae

Pomponematinae

Nannolaimoides decoratus Ott, 1972

Synonyms:

Morphology and Anatomy:

Body slender, tapering slightly towards anterior end,
Cuticle with transverse row of dots from level of amphid; alternating pattern of one, two or three rows of simple dots or two fused dots;
Lateral differentiation consists of larger irregularly spaccd dots along the lateral fields from end of esophagus to tail.
Head with one circle of six conical setae and one circle of ten cephalic setae,
One circle of 9- 11 um long cervical setae shortly posterior to amphids, followed by a circle of four 3.5 to 5 um long setae.
Tail with several long setae in submedian position,
Amphids spiral, formed by two parallel ridges very close together: 4 3/4 to 5 1/4 turns in males, 4 1/4-41/2 turns in females, 147-59% of corresp. body diam, located opposite to conical part of stoma.
Stoma with shallow, cup-shaped vestibulum, chcilorhabdions poorly developed, with a weak rectangular dorsal tooth and two to four sublateral projections of the cuticular lining in the conical part of the stoma,
Esophagus well-developed; the part surrounding the stoma set off by a slight constriction, dilated at posterior end to a long ovoid bulb
Intestine with large cells, no cardia.
Ventral gland small, postesophageal. Excretory pore probably at the level of the cephalic setae.
Tail in males always conical, 3.6-4.4 cbd long, in females conical or posterior half more or less cylindrical, 5-5.6 abd long.

Nannolaimoides decoratus 1. Male; 2. Female; 3. Male anterior; 4. Male posterior; 5. Female head; 6. Female tail 7. Male; head 8. Spicular apparatus
Drawings from Ott, 1972

Males:

Diorchic; anterior teste outstretched, 36-50% of body length
Spicula strongly cuticularized, arcuate
Gubernaculum with strong median piecc and relatively weak lateral flanges
16-18 preanal supplements, consisting of' an outer plate-shaped piece and an inner cup-shaped piece with a pore through both.

Females:

Didelphic, amphidelphic, ovaries reflexed.
Vulva at 50-54% of body length, strongly cuticularized.

Ref: Ott, 1972

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Collected in ecological investigations of the nematode fauna of a fine sand flat at Wrightsville Beach, north of Wilmington, North Carolina. Samples taken at various depths in the sediment at about the midtide level (Ott, 1972)