Prochaetosoma ventriverruca

Prochaetosoma ventriverruca	Contents	Rev 02/22/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Prochaetosoma Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Draconematidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Chromadorea
Chromadoria
Desmodorida: Desmodorina
Desmodoroidea
Draconematidae: Prochaetosomatinae
Prochaetosoma ventriverruca Tchesunov, 2015

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Morphology and Anatomy:

Body short and stout, roughly conical anteriorly, bulging in the region of the nerve ring, narrowing from level of cardia to the anterior gonad, then evenly swollen posteriad to anus.
Cuticle striated from posterior margin of the amphideal fovea
First 6 to 10 striations fine, dense and not quite regular; then becoming broader at the level of cephalic adhesive tubes (CATs),
Four short cephalic setae at the level of the amphideal fovea.
Amphideal fovea a round spiral, ventrally coiled n about 1-2 turns
Somatic setae directly inserted in "cuticular pores":on body cuticle; four rows of somatic setae extended throughout on each lateral body side
Tail rather short, conical. Head (rostral) cuticle smooth or seemingly slightly rough.

Male

Many setae along body rom the head to the subventral adhesive tubes, continued as subventral adhesive tubes to cloaca
Prochaetosoma ventriverruca differs all knownn Prochaetosoma species with males having a midventral preanal wart (cuticular swelling).
Monorchic, testis outstretched
Spermatozoa usually condensed in a vermiculated mass.
Spicules short, arcuate, cephalated and distally pointed.
Gubernaculum an elongate trough without an apophysis.
\Tail elongate-conical, with terminal spinneret. Terminal cuticular cone indistinctly separated from the annulated cuticle.

Female:

Many setae along body rom the head to the subventral adhesive tubes, continued as subventral adhesive tubes toanus.
Pharyngostoma with slightly sclerotized walls; short and widened; with small triangular dorsal tooth . Posterior pharyngostoma narrow.
Pharynx short, with radial muscular striation. Anterior half of the pharynx slightly wider than posteriori and terminaticng in an oval muscular bulb.
Cardia short, hemispherical. Midgut with wavy internal lumen. Rectum relatively long. Large flap covers the anal opening.
Didelphic, amphidelphis with short reflexed ovaries.
Vulva slightly protruded as a small truncate cone.
Tiny spermatozoa may be visible in uterus and vagina lumen.

Ref: Tchesunov, 2015

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

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Distribution:

Described from hydrothermal site Lucky Strike, Mid-Atlantic Ridge, depth 1682 m. Sample washed from a piece of the sulphide tube overgrown with mussels.

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Feeding:

Probably epistrate feeders with scraping tooth in stoma (Heip et al., 1998; Tchesunov, 2015).

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Biology and Ecology:

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Life Cycle:

Apparently sexually reproducing based on sperm in both male and female genital tracts.

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:

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.