Cruznema tripartitum

Cruznema tripartitum	Contents	Rev 12/17/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Cruznema Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Rhabditidae Menu	Feeding	References
Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Rhabditoidea

Rhabditidae

Cruznema tripartitum (Linstow, 1906), Zullini, 1982

Morphology and Anatomy:

Cruznema: Male tail - Spicules and bursa with rays

Cruznema: Male tail - Sperm in vas deferens

Photomicrographs by Howard Ferris

Plump nematodes, 0.6-1.0 mm long
Cuticle with both longitudinal and transverse striations and punctations
Lateral field with four incisures.
Lip region offset, wider than adjacent body; lips well separated by deep grooves
Stoma narrow, tubular, 8-9 times longer than wide; cuticularized, basal portion with three denticles
Esophageal collar surrounds 1/3 of stoma
Esophagus with median swelling and terminal bulb.
Female gonad monovarial, prodelphic, overy reflexed.
Vulva at >70% of body length, a transverse slit with prominent lips
Tail elongate, narrowing to a pinted terminus
Male with gubernaculum and straight spicules.
Testis single, reflexed ventrally
Bursa peloderan, cadal alae meet posterior to tail tip; 8 pairs of bursal papillae.

Ref: Tahseen et al. (2012)

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

Distribution:

Widely distributed, world-wide.

Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters

Ecosystem Functions and Services:

Nitrogen mineralization: excretion of excess N during consumption of bacteria (Ferris et al., 1997)..

Ferris, H., M. Eyre, R. C. Venette and S. S. Lau. 1996. Population energetics of bacterial-feeding nematodes: stage-specific development and fecundity rates. Soil Biology and Biochemistry 28:271-280.

Ferris, H., R. C. Venette and S. S. Lau. 1996. Dynamics of nematode communities in tomatoes grown in conventional and organic farming systems, and their impact on soil fertility. Applied Soil Ecology 3:161-175.

Ferris, H., S. Lau and R. Venette. 1995. Population energetics of bacterial-feeding nematodes: respiration and metabolic rates based on carbon dioxide production. Soil Biology and Biochemistry 27:319-330.

Ferris, H., R. C. Venette and S. S. Lau. 1997. Population energetics of bacterial-feeding nematodes: Carbon and Nitrogen budgets. Soil Biology and Biochemistry 29:1183-1194.

Tahseen, Q., Sultana, R. Khan, R. and Hussain, A. 2012. Description of two new and one known species of the closely related genera Cruznema Artigas, 1927 and Rhabpanus Massey, 1971 (Nematode: Rhabditidae) with a discussion on their relationships. Nematology 14:555-570.

Venette, R. C. and H. Ferris. 1997. Thermal constraints to population growth of bacterial-feeding nematodes. Soil Biology and Biochemistry 29:63-74.