Thada

  

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Rev 03/31/2025

  Classification Hosts
Morphology and Anatomy Life Cycle
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Distribution Management
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Classification:

      Chromadorea
       Rhabditida
       Tylenchina
        Tylenchoidea
         Tylenchidae

           Boleodorinae

          Thada Thorne, 1941

Type species of the genus: Thada striata Thorne, 1941

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Morphology and Anatomy:

.

  • Similar to Ditylenchus. 

  • Cephalic region flattened; amphid slits longitudinal

  • Wide (2.5-3.1 um) well marked body annules. 

  • Stylet delicate, knobs as small swellings at the end of the shaft. 

  • Dorsal esophageal gland opening more than 4 µm from stylet base. 

  • Median bulb  slightly swolen without valve. 

  • Deirids present. 

  • Vulva membrane laching.

  • Spicules cephalated.


Ref: Fortuner and Maggenti, 1987; Hosseinvand et al., 2020
. Thada populus Female (A) entire body; (B) anterior end and pharynx; (C) amphidial slit; (D) cephalic region and stylet; (E) reproductive system; (F) cross section of body; (G-I) tail.
Drawings from Hosseinvand et al., 2020
Body size range for the species of this genus in the database - Click:
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Distribution:

Species have been repored from North America and the Middle East.

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Economic Importance:

 

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Feeding:
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Hosts:
For an extensive host range list for this genus, click
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Life Cycle:

For Ecophysiological Parameters for this genus, click 
 
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Damage:

 

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Management:

 

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References:

Fortruner, R., Maggenti, A.R. 1987. A reappraisal of Tylenchina (Nemata). 4. The family Anguinidae Nicoll, 1935. Revue de N�matologie 10: 163-176.

Geraert, E. 2008. The Tylenchidae of the world: identification of the family Tylenchidae (Nematoda). Gent, Academia Press: 540 pp

Hosseinvand M, Eskandari A, Ghaderi R, Karegar A. 2020. Morphological and molecular data of two species of the rare genera Thada Thorne, 1941 and Tenunemellus Siddiqi, 1986 (Nematoda: Tylenchidae) from Iran. Journal of Helminthology. 94:e149. doi:10.1017/S0022149X20000279

Thorne G. 1941. Some nematodes of the family Tylenchidae, which do not possess a valvular median oesophageal bulb. Great Basin Naturalist 2, 37�85.

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Copyright © 1999 by Howard Ferris.
Revised: March 31, 2025.