Zalonema vicentei

Zalonema vicentei	Contents	Rev: 10/29/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Zalonema Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Desmodoridae Menu	Feeding	References
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Classification:

Chromadorea
Chromadoria
Desmodorida: Desmodorina
Deamodoroidea
Desmodoridae: Desmodorinae
Zalonema vicentei Larrazabal-Filho, Da Silva, & Esteves, 2015

Synonyms:

Morphology and Anatomy:

Body long and cylindrical, yellowish brown, with stout cephalic capsule and conical tail.
Cuticle annulated except on cephalic capsule and final portion of tail.
Short somatic setae in six longitudinal rows; two dorsal, two lateral and two ventral.
Head rounded, triangular, with long cephalic capsule.
Fovea amphidialis spiral (3.5 turns).
Buccal cavity relatively long, with two small teeth (one dorsal and one ventral), six lips with 12 folds.
Anterior sensilla arrangement: six inner labial sensilla, six outer setae, four cephalic setae positioned above the fovea amphidialis; base of cephalic capsule with ring of four
short subcephalic setae.
Pharynx with rounded terminal with cuticularized lumen divided into four distinct regions.
Nerve ring surrounding pharynx, position variable between head and mid pharynx
Cardia inserted in intestine.
Tail conical with elongated non-annulated tail end, and spinneret.

	Females: Similar to male; but lacking ventral ala and lateral alae\ Didelphic, amphidelphic, ovaries reflexed Vulva a transverse slit. Vagina vera short, vagina uterina with sphincter muscle. Ref: Larrazabal-Filho et al., 2015
Zalonema vicentei Female: A: Entire body; B: Anterior; C: Head Drawings from Larrazabal-Filho et al., 2015

Males: Diorchic, testes outstretched Spicules strongly sclerotized, with rounded capitulum and broad velum. Gubernaculum simple, without apophysis. Lateral alae on each side in posterior region, extending one-fifth of total body Ventral ala of 304um Three caudal glands.

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

Marine nematodes, Z. vicentei described from the from the continental shelf in the Potiguar Basin, northeastern Brazil at depths between 45 and 100 m. In sediment: of fine to coarse bioclastic sand.

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Feeding:

Probably epistrate feeders

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Biology and Ecology:

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Life Cycle:

Ecophysiological Parameters:

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

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Ecosystem Functions and Services:

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Management:

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References:

Cobb, N.A. (1920) One hundred new nemas (type species of 100 new genera). Contributions to a Science of Nematology (Cobb), 9: 217-343. http://dx.doi.org/10.2307/3272166

Lrrazabal-Filho, A.L., Da Silvas, M.C., Esteves, A.M. 2015. Four new species of free-living marine nematodes of the family Desmodoridae (Nematoda: Desmodorida) and a redescription of Desmodora nini (Inglis, 1963) from the continental shelf off northeastern Brazil. Zootaxa 4021:063-092. doi.org/10.11646/zootaxa.4021.1.3

Tchesunov, A.V. 2014. Order Chromadorida Chitwood, 1933. In: Schmidt-Rhaesa, A. (Ed.). Handbook of zoology, Gastrotricha, Cyclioneuralia and Gnathifera. Volume 2: Nematoda. Hamburg, Germany, De Gruyter, pp. 374-434.

Verschelde, D. and Vincx, M. 1996.. Four new species of the family Desmodoridae (Nematoda, Desmodoroidea) from Kenya. Zoologica Scripta 25, 1-20. DOI: 10.1111/j.1463- 6409.1996.tb00148.x