Rev 09/05/2023

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Thecavermiculatus Robbins, 1978


      None.Thecavermiculatus was synonymized with Atalodera (De Souza and Huang, 1994a)

The genus nname is derived from the Latin; theca - a sack, and vermicularis - of worms.

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Morphology and Anatomy:


Females: No cyst stage.  Body globose, with prominent neck and no terminal cone.  

Cuticle thick, annulated in fore part or on the major part of body, with lace-like pattern on posterior part; D-layer present.  Subcrystalline layer present (very thick in T. crassicrustatus).  

Vulva subterminal, close to anus; vulval lips not protruding; anal-vulval region flush with body contour.  

Eggs retained in female body, together with hatched second-stage juveniles. Hence the genus name - literally "sac of worms".

Males: Body twisted. 

Lateral field with four lines.  

Spicules slightly curved, distally notched; no cloacal tubus.

Tail very short.  

No phasmids

Second-stage juveniles: Lateral field with four lines.  

Esophageal glands not filling body cavity (except T. crassicrustatus).  

Tail pointed, of medium length, with long, hyaline, terminal part.  

Phasmids with lens-like structure.  

[Ref: Luc, Maggenti & Fortuner, (1988).]

Body size range for the species of this genus in the database - Click:
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Economic Importance:


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Nurse cell system: A syncytium.

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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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De Souza, R.M. and Huang, S.P. 1994a. Description of Atalodera gibbosa n. sp. and synonymization of Thecavermiculatus Robbins, 1978 to Atalodera Wouts & Sher, 1971 (Nemata: Heteroderidae). Fundamental and Applied Nematology, 17, 43�56.

De Souza, R.M. and Huang, S.P. 1994.b. Ultrastructure of the body cuticle of Atalodera gibbosa Souza & Huang, 1994 (Tylenchida :Heteroderinae) Fundamental and Applied Nematology 17:479-483.

Ghaderi, R. 2019. An outline on distribution and hosts of the cystoid nematodes of Ataloderinae Wouts, 1973 and Meloidoderinae Golden, 1971. Zootaxa 4664:: 339�350

Luc, Maggenti & Fortuner, Rev. Nematol. 11(2):159-176 (1988).

Robbins, R.T. 1978. A New Ataloderinae (Nematoda: Heteroderidae), Thecavermiculatus gracililancea n. gen., n. sp. J. Nematology 10:250-254.

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Copyright © 1999 by Howard Ferris.
Revised: September 05, 2023.