Acrobeloides tricornis

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

Classification:

Chromadorea

Rhabditida
Tylenchina
Cephaloboidea

Cephalobidae

Acrobeloides tricornis (Thorne, 1925) Thorne, 1937

Morphology and Anatomy:

Body cylindrical, about 0.5 mm long
Cuticle annulated. Lateral field prominent with lateral incisures varying in number along body length:
Head region continuous with neck.
Lip region with triradiate symmetry with 6 + 4 papillae. Three pairs of asymmetrical lips; separated by U-shaped primary axils. Secondary axils shallow. Guarding process not seen. Three labial high and sharply-pointed probolae.
Stoma cephaloboid, length 2.1-3.5 times lip region diam. Cheilorhabdions distinct, oval-shaped and strongly cuticularised.
Pharyngeal corpus fusiform and swollen metacorpus. Isthmus narrower than corpus, distinctly demarcated from metacorpus. Basal bulb oval with well-developed valves. Cardia surrounded by intestinal tissue. Nerve ring located at anterior isthmus, excretory pore at posterior isthmus. .
Tail conoid, with truncated terminus. Phasmids located 41-59% of tail length.

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

Female:

Monodelphic-prodelphic.
Vulval lips not protruding. Vagina length about 0.3 times body diam.
Rectum length 0.7-1.8 times anal body diam

. Ref: Bhat et al., 2023

Distribution:

Reported from soils world wide, also in phoretic and other assocaitions with arthropods (see genus description)

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:

Important contributions of Acrobeloides spp. to soil nutrient cycling and mineralization of organic forms of nitrogen are well documented (Anderson et al., 1981; Ferris et al., 1995 1997)

Anderson, R.V., Coleman, D.C., Cole, C.V. & Elliott, E.T. 198). Effect of the nematodes Acrobeloides sp. and Mesodiplogaster lheritieri on substrate utilization and nitrogen and phosphorous mineralization in soil. Ecology 62:549-555/

Bhat, A.H., Loulou, A., Abolafia, J., Machado, R.A.R., Kallel, S. 2023. Comparative morphological and molecular analyses of Acrobeloides bodenheimeri and A. tricornis Cobb, 1924 (Rhabditida, Cephalobidae) from Tunisia. Nematology 25: 207-226

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.

Ferris, H., R. C. Venette, H. R. van der Meulen and S. S. Lau. 1998. Nitrogen mineralization by bacterial-feeding nematodes: verification and measurement. Plant and Soil 203:159-171.

Thorne, G. 1925. The genus Acrobeles von Linstow, 1887. Transactions of the American Microscopical Society 44:171-210.