Symplocostoma brasiliensis

Symplocostoma brasiliensis	Contents	Rev: 08/24/2026
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Symplocostoma Menu	Economic Importance	Damage
	Distribution	Management
Return to Enchelidiidae Menu	Feeding	References
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Classification:

Enoplida
Oncholaimoidea
Enchelidiidae

Symplocostoma brasiliensis Neres, Fonseca-Genevois & Morgado, 2113

Synonyms:

Morphology and Anatomy:

Anterior region narrow, head diameter 18 27% of pharynx diameter.
Cuticle smooth. Cervical setae arranged in 8 longitudinal rows. Six inner labial papillae Outer labial setae (6) and cephalic setea (4) in a single circle.
Ocelli in two parts, one with granular pigment and the other sclerotized; located about 1.4 x head diameter from anteror.
Buccal cavity sexually dimorphic: absent in male, narrow in female and divided into four portions by three cuticular rings (denticles in first portion), with three teeth (right ventrosublateral teeth larger, 74 8% of buccal cavity length).
Amphidial fovea pocket-shaped in both sexes
Secretory excretory pore , 2-3.5 x head diam behind anterior end.
Pharynx in female with inner wall strongly sclerotized and lumen slightly dilated, but not in male
Tail conical with spinneret; caudal setae present.

Ref: Neres et al., 2013

	Females: Didelphic, amphidelphic, ovaries reflexed. Vulva at about 60% of body length. Three precaudal glands.

Males: Dioorchic, testes outretched anteriorly Spicules 3.6-4 cbd long, about 1.3 x tail length. Gubernaculum simple, without apophysis Ten pairs of precloacal papillae arranged. Ventral and subventral precloacal setae. Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Distribution:

Collected at depths between 6 and 37 m from the continental shelf of the Potiguar Basin off the coast of the states of Rio Grande do Norte and Ceara, Braxil.

Feeding:

Free-living freshwater (estuarine?) nematodes, probably omnivores.

Life Cycle:

Ecophysiological Parameters:

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

Neres, P.F., Fonseca-Genevois, G.V. and Esteves, A.M. 2013. New records and species of Enchelidiidae (Nematoda): Symplocostoma
brasiliensis sp. nov. and a first description of the female of Calyptronema pigmentatum Gerlach, 1957), Marine Biology Research, 9:10: 990-1004,