Rev 03/10/2020

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Morphology and Anatomy Life Cycle

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          Caloosia Siddiqi & Goodey, 1964

      Raski and Luc (1987) considered Hemicaloosia a junior synonym of Caloosia.  However, Siddiqi (2000) returned Hemicaloosia to genus status (Inserra et al., 2013).

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Morphology and Anatomy:


Female: Cuticle without an extra-cuticular layer. 

Lateral field absent in female.

Labial annules separated, usually modified.  

Vulva transversely oval, less than half body diameter long, depressed and flush with body contour (no discontinuity of body contour near vulva).  Anterior vulva lip modified, partly overhanging vulva.  

Vagina sigmoid.  

Tail elongate, filiform.

Male: Labial region continuous, framework not as "spectacle mark."

Spicules straight.  

No penial tube.  

A single hypoptygma projecting ventrally.  

Caudal alae covering more than one-third of the tail.  

Tail shorter than that of female.

Juvenile: Cuticle and labial area as in corresponding female.

Fourth-stage male juvenile with stylet.

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


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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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Inserra, R. N., Stanley, J.D., Troccoli, A., Chitambar, J., Subbotin, S.A. 2013. Hemicaloosia vagisclera n. sp. (Nematoda: Caloosiidae) from Bermuda grass in Florida and its phylogenetic relationships with other criconematids. Nematology 15: 23-39.

Raski, D.J. & Luc, M. (1987). A reappraisal of Tylenchina (Nematoda) 10. The superfamily Criconematoidea Taylor, 1936. Revue de Nµmatologie 10, 409-444.

Ray, S. & Das, S.N. (1978). Hemicaloosia americanae n. gen. n. sp. (Nematoda: Hemicycliophoridae) from Orissa, India. Journal of Research, OUAT, Bhubaneswar, India 8, 131-138.

Siddiqi, M.R. (2000). Tylenchida parasites of plants and insects, 2nd edition. Wallingford, UK, CABI Publishing, 833 pp.

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Copyright © 1999 by Howard Ferris.
Revised: March 10, 2020.