Desmoscolecida

 Specimen of Greeffiella, from here.

Belongs within: Cycloneuralia.

The Desmoscolecida are a group of mostly marine nematodes with a heavily ornamented cuticle and sclerotised head cap.

Characters (from Carlton 2007): Cuticle usually striated, with or without prominent setae on peduncles, spines, scales, wart-like protrusions or desmens; inner and outer labial cephalic sensilla obscure, paralabials setiform, or if outer labials apparent, then often situated on peduncles; amphids vesiculate or circular; stoma very small, unarmed; rugae absent; caudal glands not projected anterior to rectum; female reproductive system didelphic, amphidelphic, gonoducts outstretched or reflexed; male reproductive system monorchic or diorchic.

<==Desmoscolecida [Desmoscolecina, Desmoscolecoidea]
    |--CyartonematidaeLB02
    |--DesmoscolecidaeLB02
    |    |--Greeffiella dasyura Cobb 1922L86
    |    `--Desmoscolex Claparède 1863 [Desmoscolecinae]E86
    |         `--D. aquaedulcis Stammer 1935E86
    `--MeyliidaeLB02
         |--Haptotricoma Lorenzen 1977L86
         |    `--H. arenariaL86
         `--Desmotimmia Freudenhammer 1975L86
              `--D. mirabilisL86

*Type species of generic name indicated

References

Carlton, J. T. 2007. The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon 4th ed. University of California Press.

[E86] Eder, R. 1986. Nematoda from continental subterranean aquatic habitats. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 125–132. E. J. Brill/Dr W. Backhuys: Leiden.

[LB02] Ley, P. de, & M. Blaxter. 2002. Systematic position and phylogeny. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 1–30. Taylor & Francis: Florence (Kentucky).

[L86] Lorenzen, S. 1986. Nematoda: interstitial nematodes from marine brackish and hypersaline environments. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 133–142. E. J. Brill/Dr W. Backhuys: Leiden.

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