Halomonhystera vandoverae

Halomonhystera vandoverae	Contents	Rev: 11/19/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Halomonhystera Menu	Economic Importance	Ecosystem Functions and Services
	Distribution	Management
Return to Monhysteridae Menu	Feeding	References
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Classification:

Chromadorea
Chromadoria
Monhysterida: Monhysterina
Monhysteroidea
Monhysteridae: Diplolaimellinae
Halomonhystera vandoverae (Zekeky, Soreneson & Bright, 2006) Tchesunov, 2015

Synonyms:

Thalassomonhystera vandoverae (Zekeky, Soreneson & Bright, 2006) Tchesunov, Portnova, & van Campenhout, 2015

Morphology and Anatomy:

Very small nematodes.
Body spindle-shaped, slender.
Cuticle thin, smooth. Many small light-refracted grains scattered in the body.
Anterior end and labial region not offset.
Inner labial sensilla not visible; ten very shortouter labial setae and four slightly longer cephalic setae
Amphideal fovea with a cuticular rim.
One or two lateral setae just posterior to the amphideal fovea
Postamphideal and cervical setae slightly longer than the anterior setae.
Buccal cavity small, cylindro-conoid, with weakly sclerotized rhabdions.
Pharynx cylindroid, relatively wide, muscular throughout its length.
Pharyngeal glands nor visible.
Renette cell body posterior to the cardia, to the right of the intestine.

	Females: Monodelphic;gonad to the right of the intestine. Body narrows posterior to vulva. Vulva at a considerable distance anterior to the anus, Uterus may contain one to four fertilized eggs about . Tiny spherical spermatozoa in between fertilized eggs and immature oocytes. Tail conical, terminated with a conical spinneret. Tail is mostly dorsally bent.

Males: Monorchic. Spicules slender, arcuate, distally pointed, proximally with weakly developed knobs. Gubernaculum with short, paired caudal apophyses. Ref. Tchesunov, 2015
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Distribution:

Described from specimens from Snake Pit hydrothermal site, mid-Atlantic Ridge, hydrothermal site Snake Pit at 3420â€“3480 m depth); washed from and aggregate of mussels.

Feeding:

Non-selective deposit feeders, actually bacteria feeders (Heip et al., 1988)

Life Cycle:

Probably sexually reproducing.

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:

References:

Heip, C., Vincx, M., Vranken, G. 1985. The ecology of marine nematodes. Oceanography and marine biology. Ann Rev Lond 23:399-489

Tchesunov, A.V. 2015. Free-living nematode species (Nematoda) in hydrothermal sites of the North Mid-Atlantic Ridge. Helgoland Marine Research 69:343-384.

Tchesunov, A.V., Portnova, D.A,, and van Campenhout, J. 2015 Description of two free-living nematode species of Halomonhystera disjuncta complex (Nematoda: Monhysterida) from two peculiar habitats in the sea. Helgol Mar Res 69:57-85. doi:10.1007/ s10152-014-0416-

Zekely, J,, SÃ¸rensen, M,, Bright, M. 2006 Three new nematode species (Monhysteridae) from deep-sea hydrothermal vents. Meiofauna Marina 15:25-42