Desmodora marci

Desmodora marci	Contents	Rev: 10/31/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Desmodora Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Desmodoridae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Chromadorea
Chromadoria
Desmodorida: Desmodorina
Deamodoroidea
Desmodoridae: Desmodorinae
Desmodora marci Verschelde, Gourbault & Vincx 1998

    Synonyms:

Morphology and Anatomy:

Body elongate spindle-shaped to nearly cylindrical apart from tail.
Body yellowish to brownish, with epidermal inclusions more densely pigmented .
Body cuticle finely annulated,fused and split in different areas; no apparent laterl fields..
Cephalic cuticle non-annulated and modified into a hemispherical and slightly convex cephalic capsule. Cephalic without striation, wrinkled around mouth opening,
Six inner labia, six outer labial short peg-like papillae, and four slender cylindrical cephalic setae .
Somatic setae slender, cylindrical, truncated apically; fairly numerous, arranged in irregular longitudinal rows.
Amphideal fovea spirally coiled in 1.5 turns, in the middle of the cephalic capsule.
Cheilostoma tight, pharyngostoma narrow with a small slightly sclerotized triangular tooth.
Pharynx evenly muscular throughout its length and terminated in a rounded bulb.
Cardia not surrounded by intestine, trapezoidal,
Tail elongate conical,, with terminal cone devoid of cuticular annulation

Females:

Didelphic, amphidelphic, ovaries reflexed.

Ref: Tchesunov, 2015

Desmodora marci Male anterior; bar = 100 um
From Tschesunov, 2015

Males:

Monorchic, testis outstretched
Spermatozoa rather large, oval, with slightly radially striated cortex.
Spicules short, flat, arcuate.
Gubernaculum paired short bars parallel to distal parts of the spicules.
No supplements; short midventral setae.

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

Distribution:

Collected from Lucky Strike hydrothermal site in mid-Atlantic Ridge at depth 1682 m. Nematodes washed from sulphide tube overgrown with mussels.

Initial collection described by Verschelde et al. (1998) was from hydrothermal vents in the Lau Basin in the South-West Pacific atabout 1700 m depth at temperatures < 20C.

Feeding:

Free-living marine nematodes from ocean depths. Probably epistrate feeders with scraping tooth in stoma (Heip et al., 1998; Tchesunov, 2015)

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:

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.

Verschelde, D,, Gourbault, N,, Vincx, M. 1998. Revision of Desmodora with description of new desmodorids (Nematoda) from hydrothermal vents of the Pacific. J Marine Biol Assoc UK 78:75-112

Desmodora marci

Contents

Classification:

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Morphology and Anatomy:

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Distribution:

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Feeding:

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Biology and Ecology:

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Life Cycle:

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Ecosystem Functions and Services:

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Management:

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References:

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Copyright 1999 by Howard Ferris.
Revised: October 31, 2024.

Desmodora marci

Copyright 1999 by Howard Ferris. Revised: October 31, 2024.

Copyright 1999 by Howard Ferris.
Revised: October 31, 2024.