Family Osstellidae

                                 Revised 01/20/26

Classification:

Phylum Nematoda

  Class Chromadorea

    Subclass Chromadoria

Order Rhabditida

Suborder Tylenchina
Superfamily Cephaloboidea

Osstellidae (Heyns, 1962) Ali, Suryamwanshi & Chisty, 1973

Heyns originally described Osstellidae as subfamily Osstellinae of the Cephalobidae. Later it was elevated to family Status/

Characteristics:

• Dorsal and ventral pairs of lips modified as two subventral and two subdorsal hooks.
• Rhabdions fused and protrude as a tube above lip level.
• Esophagus cylindricalp; isthmus not well differntiated from corpus
• Basal esophageal bulb wealy developed. without valves
• Ovary panagrolaimoid, prodelphic, reflexed back beyond vulva..

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References

Ali, S.M., Suryamwanshi, M.V. & Chisty, K.Z., 1973. Two new species of Dri/ocephalohus Coomans & Goodey, 1965 (Nematoda : Drilocephalobidae n. fam.) from Marathwada, India, with a revised classification of the superfamily Cephaloboidea (Paramonov, 1956) Paramonov, 1962. Nematologica, 19: 308-317.

 Andrassy, I. 2005. Free-livinmg nematodes of Hungary I. Hungarian Natural History Museum.

Heyns, J., 1962. Osstella hamata n. gen., n. sp. , Zeldia serrata n. sp. and Acrobeles thornei n. sp., three new nematodes from South Africa (Rhabditida : Cephalobidae). Nemarologica, 8:30 1- 306.

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