Greeffiella		Contents		Rev: 01/07/2023
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Greeffiella Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Desmoscolecidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

  Chromadoria

       Desmoscolecida

Desmoscolecoidea

            Desmoscolecidae

Subfamily Desmoscolecinae

Tribe: Greeffiellini

  

       Greeffiella Cobb, 1922

Type genus of the Tribe: Greeffiella Filipjev, 1929

 Type species of the genus: Greeffiella oxycaudata (Greeff, 1869) Cobb, 1922

   Synonyms:

    

Back to Top

Morphology and Anatomy:

• Small nematodes, usually < 450um, with entire body covered with spinous hairs.
• Body composed of 67-70 annules, (3-6um wide).
• Cuticle transparent along the entire length of body transparent, with large numbers of hair-like setae of different length arranged in transverse rows.
•  Head short, rounded, narrower than the first annulus, bearing large, elliptical, thick-rimmed amphids, that are broader than the head.
• Four thin cephalic sensory setae anterior to amphids.
•  Pharynx short, slightly expanding to the base but without a bulb.
• Ocelli present or absent

Females:

• didelphic, amphidelphic

Males:

• Monorchic,
• Paired spicules, no gubernaculum.
• Subventarl pre- and posr-cloacal papillae present or absent

Ref: Decraemer and Rho, 2013; Sergeeva and Revkova, 2021

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

Back to Top

Distribution:

Small to minute, free-living marine nematodes; including from deep sea.

Species of this genus are found in sea sand on beaches, coral reefs, and even at great depths (in the Pacific, Atlantic, Southern, Indian Oceans (southern Australia), Mediterranean Sea (sergeeva and Revkova, 2021)

Back to Top

Feeding:

Back to Top

Biology and Ecology:

Back to Top

Life Cycle:

Back to Top

Ecosystem Functions and Services:

Back to Top

Management:

Back to Top

References:

Cobb, N.A. 1922. Greeffiella. Journal of the Washington Academy of Sciences. 12:209-303 (reprinted in Contrib. to a Science of Nematology (Baltimore),

 Decraemer, W. & Rho, H.S. 2013. 7.11 Order Desmoscolecida. In: Schmidt-Rhaesa A. (Ed.), Handbook of zoology. Gastrotricha, Cycloneuralia and Gnathifera: Volume 2: Nematoda, 351-372.

Filipjev, I. 1929. Les Nematodes libres de la baie de la Neva et de l'extremite orientale du Golfe de Finlande, Premiere partie. Archiv f�r Hydrobiologie, 20: 637-699.

Greef, R. 1869. Untersuchungen �ber einige merkw�rdige Thiergruppen des Arthropen- und Wurm- Typus. Archiv f�r Naturgeschichte., 35:71-121.

Sergeeva, N.G., Revkova, T.N. 2021. First finding of Greeffiella Cobb, 1922 (Nematoda, Desmoscolecida) in the Black Sea. Ecologica Montenegrina 42: 96-102. http://dx.doi.org/10.37828/em.2021.42.5

Copyright © 1999 by Howard Ferris.
Revised: January 07, 2023.