Sigmolenchus sinuosus		Contents		Rev 12/17/2024
		Classification		Hosts
		Morphology and Anatomy		Life Cycle
Return to Sigmolenchus Menu		Economic Importance		Damage
		Distribution		Management
Return to Tylenchidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea
       Rhabditida
       Tylenchina
        Tylenchoidea
         Tylenchidae  

            Ecphyadophorinae

              Sigmolenchus sinuosus Gharahkhani, Pourjam, Abolafia, Catillo & Pedram, 2020

Type species of the genus.

Synonyms:
      

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Morphology and Anatomy:

The species name refers to the sinuous shape of the amphid openings.

Female::

• Slender nematodes with short body, narrowing toward both extremities and posteriorly to filiform tail.
• Cuticle smooth under light microscopy (LM), but finely annulated under SEM, lacking longitudinal lines.
•  Lateral line a simple band with smooth margins.
• Anterior end rounded in LM but four cephalic papillae  and 6 inner labial papillae visible in SEM.
• Amphidial openings are long wavy sinuous slits  originating close to labial plate, extending laterally posteriorly, reaching and passing first body annulus, amphidial fovea spacious.
• Stylet  with three knobs, slightly directed posteriorly, conus comprising ca one-third of total stylet length.
•  Pharynx tylenchoid, metacorpus ovate with small valve, pharyngeal bulb pyriform to saccate.
• Secretory-excretory pore at metacorpus level.
• Intestine simple, rectum and anus functional.
• Reproductive system monodelphic-prodelphic,ovary outstretched, oviduct barely visible, spermatheca rectangular with rounded corners to ovate in shape, crustaformeria quadricolumellate, uterus simple,
• .Vulva with small lateral flaps under SEM and short post-vulval uterine sac (PUS).
•  Tail filiform with pointed tip.

Male:

• Similar to female in general morphology except for sexual characters.
• Bursa simple, spicules small and slender, tylenchoid.

Ref: Gharahkhani et al., 2020

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

Key to the Family Tylenchidae

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Distribution:

Described from 2m deep in saline sediments in a mangrove (Avicennia marina (Forssk.) Vierh) swamp in southern Iran.

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Economic Importance:

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Feeding:

Unknown. Based on stylet length and esophageal configuration, probably an ectoparasite of epidermal cells and root hair cells and/or of hyphae.

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Hosts:

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Life Cycle:

Ecophysiological Parameters:

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Damage:

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Management:

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

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References:

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Copyright © 1999 by Howard Ferris.
Revised: December 17, 2024.