Placodira	Contents
				Rev 05/20/2025
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Placodira Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Cephalobidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

  Rhabditia

     Rhabditida

        Tylenchina

        Cephaloboidea

            Cephalobidae   

        

                     Placodira Thorne, 1937

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Morphology and Anatomy:

• Cuticle tessellate over anterior 12 to 16 annules.
• Labial probolae low, thick, rounded. Cephalic probolae lobe-like .
• Length of esophageal isthmus less than neck width; corpus slender, cylindrical.
• Nerve ring far forward surrounding corpus near beginning of its posterior third .
• Excretory pore near nerve ring .

Ref: Thorne, 1937

Thorne (1837) concluded that the genus Placodira appears most closely related to Acrobeloides but differs in the tessellate cuticle of the anterior region, the very slender cylindrical corpus of the esophagus, the exceedingly short isthmus and the positions of nerve ring and excretory pore.

Placodira lobata: tessellate cuticle in anterior, and labial probolae. From Thorne (1937)

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Distribution:

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Feeding:

Food Sources and Feeding strategies for the genus Placodira

  Bacteria

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Biology and Ecology:

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Life Cycle:

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Ecosystem Functions and Services:

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Management:

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References:

DeLey, I.T., S.A.Nadler, S. Bostrom, C. Robinson and  O. Holovachov. 2011. Redescription of Placodira lobata Thorne, 1937 (Rhabditida: Cephalobidae) with a discussion of the systematic position of the genus. Nematology 13:103-114.

Thorne, G. 1937. A revision of the nematode family Cephalobidae Chitwood and Chitwood, 1934. Proc. Helminth Soc. Wash. 4:1-16.

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Copyright © 1999 by Howard Ferris..
Revised: May 20, 2025.