Actinca

  

Contents

  

Rev 02/27/2023

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
Return to Actinca Menu Ecosystem Functions and Services
Distribution Management
Return to Actinolaimidae Menu Feeding  References
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Classification:

Enoplea
Dorylaimia
     Dorylaimida
Actinolaimidae
Brittonematinae

Actinca Andrássy, 1964

Type species of the genus: Actinca gracillima Andrassy, 1964

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Morphology and Anatomy:

Nematodes in the genus Actinca (and in the subfamily Brittonematinae of the Actinolaimidae) are cosidered to have a triprtite esophagus which consists of a very long (nonmuscular) section, a short, more msucular, middle section that tapers into an enlarged posterior region (Commans and Loof, 1986)..

Actinca and Afractinca are closely related genera with a few relaible distinguishing characters:

Actinca: Afractinca
  • Labial field with internal (sunken) sclerotized ring
  • Six inner labial papillae behind the labial ring
  • Cuticle with 24-32 longitudinal ridges
  • Cuticle between ridges smooth (under light microscope)
  • Vulva levelling with body surface, ventro-medial longitudinal ridge(s) continuous at vulva
  • One species inhabiting East Africa, the other five Central and South America
  • Labial field with external (protruded) cuticular ring
  • Six inner labial papillae on the labial ring
  • Cuticle with 14-22 longitudinal ridges
  • Cuticle between ridges transversely striated (under ligtht microscope)
  • Vulva sunk in body contour, ventro-medial longitudinal ridge interrupted at vulva
  • All the five species inhabiting West Africa

Ref: Andrassy, 2010

 

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 Female:  
Males:


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

 

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Feeding:

 Categorized by Yeates et al (1993) as omnivore and predator.    

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Biology and Ecology:
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Life Cycle:

For Ecophysiological Parameters for this genus, click 
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Ecosystem Functions and Services:

 

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Management:

 

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References:

Andrassy, I. 2009. Free-living Nematodes of Hungary III.  Hungarian Natural History Museum, Budapest. 608p.

Andrassy, I. 2010. Two new nematode species of the subfamily Brittonematinae (Dorylaimida: Actinolaimidae). Opusc. Zool. Budapest, 2010, 41(2): 175�190

Coomans, A. and Loof, P.A.A. 1986. Redescription of Actinolaimus costatus Schneider, 1935 (Nematoda : Actinolaimidae), with observations on its pharyngosomatic muscles and discussion of its taxonornic position. Revue Nematol. 9:221-231.

Pena-Santiago, R. 2021. Dorylaimida Mundi (Nematoda); checklist of genera and species, with their records. UJA Editorial. 957p.

Yeates, G.W., T. Bongers, R. G. M. De Goede, D. W. Freckman, and S. S. Georgieva. 1993. Feeding habits in soil nematode families and genera—An outline for soil ecologists. Journal of Nematology 25:315-331

 

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Copyright © 1999 by Howard Ferris.
Revised: February 27, 2023.