Neotrileptium ribeirensis

Neotrileptium ribeirensis	Contents	Rev: 06/09/2026
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Neotrileptium Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Thoracostomopsidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Neotrileptium ribeirensis Vilas-Boas, da Silva, de Souza Alves, de Castro & Pinheiro-Junior, 2015.

Note: the species was transferred to the genus Neotrileptium by Zograf et al., 2025

    Synonyms:

Morphology and Anatomy:

Slightly striated cuticle, visible in the anterior region and through the tail.
Three lips.
Cephalic sensilla arrangement in three rings, the 6 outer-labial setae larger than the four cephalic setae.
Males with two pairs of sub-cephalic setae.
Narrow buccal cavity with three jaws and three isometric teeth, all on the same level and across the transverse mandibular bar.
Cylindrical pharynx with crenated contour and without a terminal bulb Triangular cardia inserted into intestine.
Males diorchic, testes opposed, left of the intestine.
Simple shaped spicules. Laminar gubernaculum with a dorsal-caudal apophysis.
Tubular pre-cloacal supplement.
Conical tail tapering at the terminal portion with terminal spinneret.

	Females: Similar to the description of the male, except for the sub cephalic setae which are present only in males. Didelphic-amphidelphic with ovaries reflexed. Vulva is located at 63% of the body length. from anterior end.. Ref Vilas-Boas et al., 2015


Males: Two pairs of sub-cephalic setae. Diorchic, diorchic, testes opposed, left of the intestine. Simple shaped spicules. Laminar gubernaculum with a dorsal-caudal apophysis. Tubular pre-cloacal supplement.

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

Distribution:

Described from sandy sediment in intertidal zone of Ribeira Beach, Bahia, Brazil,

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:

Vilas-Boas, A.C., da Silva, M.C., de Souza Alves, O.F., de Castro, F.J.V., Pinheiro-Junior, E.P. 2015. A new species of Trileptium (Nematoda: Thoracostomopsidae) from Bahia, Brazil. Zoologia 33(1): e20150043 | DOI: 10.1590/S1984-4689zool-20150043

Zograf, J.K., Efimova, K.V., Mordukhovich, V.V. 2025. Integrative descriptions of two new Thoracostomopsidae species (Nematoda, Enoplida) with the brief discussion on nematode spicules origin. Zoologischer Anzeiger 319: 50-69.