Pseudodelphis chilensis

Pseudodelphis chilensis	Contents	Rev 12/29/2022
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Pseudodelphis Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Guyanemidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Chromadorea
Chromadoria
Rhabditida: Spirurina
Dracunculoidea
Guyanemidae

Pseudodelphis chilensis Munoz, 2010

Morphology and Anatomy:

Body length large, females up to 96mm.
Cuticle almost smoothwith tiny striations.
Circular stoma opening directly into esophagus; no buccal cavity
Fourteen cephalic papillae arranged in 2 circlets; the inner circle with 3 pairs of small papillae (2 pairs located ventrolaterally and dorsoventrally, 1 pair anterior to amphids) and the outer circle with 4 duplets of larger papillae located dorsally and ventrally on each side.
A pair of lateral amphids.
Esophagus tubular with muscular and glandular section; muscular section shorter and thinner than glandular section
Nerve ring encircling middle of muscular esophagus
Deirids simple, posterior to nerve ring.
Intestine long and straight.
Tail long pointed in both males and females.



Males: Shorter than females Monorchic, testis outstretched anteriorly Spicules slight arched, well sclerotized; both with similar lengths Gubernaculum not observed. Testis situated from anterior quarter portion of body up to cloaca. Four pairs of preanal and 4 pairs of postanal papillae One pair of preanal papillae close to cloaca. The post-anal papillae pairs in zigzag pattern Area rugosa and caudal alae not present Posterior portion of body coiled Cloacal opening bulky	Female: Both ovigerous and larvigerous specimens. Body length 2-3x male length Vulva in anterior part of body, just behind glandular esophagus; Vagina directed posteriorly Didelphic but nterior uterus ending in blind sac. Ovary ending anterior to anus, Larvigerous eggs with smooth thin shell; Largest females full of larvae. Ref: Munoz, 2010
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Feeding:

Parasites of muscles at base of pectopral fins in the fish Scartichthys viridis (Blenniidae)

Life Cycle:

Oviparous (giving rise to eggs) and larviparouus (giving rise to larvae.

The littoral fish Scartichthys viridis is the known definitive host, but there may be others. The life cycle is unknown; the definitve host is an herbivore but it is possible that invertebrates such as crustacea are involved in the life cycle (Munoz, 2010).

Ecophysiological Parameters:

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

Back to Top

Ecosystem Functions and Services:

Back to Top

Management:

Back to Top

References:

Moravec , F., Chaabane, A. Neifar, L., Gey, D., Justine, J-L. 2016. Descriptions of Pseudodelphis chilensis n. sp. and P. tunisiensis n. sp. (Nematoda: Philometridae) from Epinephelus spp. off Tunisia confirm a high degree of host specificity of gonad-infecting species of Pseudodelphis Costa, 1845 in groupers (Serranidae). Syst. Parasitol. 93:115-128.

Moravec, F., de Buron, I. 2013. A synthesis of our current knowledge of philometrid nematodes, a group of increasingly important ish parasites. Folia Parasitologica 60:81-101.