Post-parasitic juvenile of Hexamermis sp., copyright S. Patricia Stock.

Belongs within: Dorylaimia.

The Mermithida are a group of often large nematodes that are parasitic on insects and other invertebrates, often emerging as adults to breed.

Characters (from Khuong B. Nguyen): Parasites of invertebrates. Stichosome (longitudinal series of glandular cells arranged along the esophagus) present. Early juvenile stages with protrusible stylet that is absent in adults. Amphids dorylaimoid.

<==Mermithida [Mermithina, Mermithoidea]
    |--Tetradonematidae LB02
    `--Mermithidae LB02
         |--Agamomermis phalangii (Haldeman 1851) [=Filaria phalangii] PC00
         |--Aranimermis gigantea PC00
         |--Heydonius Taylor 1935 H62
         |    `--*H. matutinus (Menge 1866) [=Mermis matutina] H62
         |--Mermis Dujardin 1842 H62
         |    |--*M. nigrescens Dujardin 1842 H62
         |    `--M. subnigrescens MM02
         |--Agamermis G02
         |    |--A. decaudata G02
         |    `--A. unka KH02
         `--Hexamermis PC00
              |--H. albicans P93
              |--H. brevis J02
              `--H. cavicola NC91

Mermithida incertae sedis:
  Gastromermis MM02
    |--G. boophthorae MM02
    |--G. hibernalis H02
    `--G. interstitialis Kaiser & Kirchengast 1979 E86
  Pheromermis cornicularis J02
  Amphimermis J02
    |--A. bogongae NC91
    `--A. elegans J02
  Daubaylia MM02
  Romanomermis culicivorax [incl. Reesimermis nielseni] KH02
  Heleidomermis libani KH02
  Ovomermis sinensis KH02

Nomina nuda: Agamermis incerta Steiner in Stipperger 1928 PC00
             Filaria truncata Rudolphi 1819 [=Mermis truncata] PC00
             Filaria truncatula Rudolphi 1819 [=Agamomermis truncatula, Gordius truncatula, Mermis truncatula] PC00

*Type species of generic name indicated


[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.

[G02] Gems, D. 2002. Ageing. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 413–455. Taylor & Francis: Florence (Kentucky).

[H02] Hope, I. A. 2002. Embryology, developmental biology and the genome. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 121–145. Taylor & Francis: Florence (Kentucky).

[H62] Howell, B. F. 1962. Worms. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt W. Miscellanea: Conodonts, Conoidal Shells of Uncertain Affinities, Worms, Trace Fossils and Problematica pp. W144–W177. Geological Society of America, and University of Kansas Press.

[J02] Justine, J.-L. 2002. Male and female gametes and fertilisation. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 73–119. Taylor & Francis: Florence (Kentucky).

[KH02] Kerry, B. R., & W. M. Hominick. 2002. Biological control. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 483–509. Taylor & Francis: Florence (Kentucky).

[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).

[MM02] Munn, E. A., & P. D. Munn. 2002. Feeding and digestion. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 211–232. Taylor & Francis: Florence (Kentucky).

[NC91] Nielsen, E. S., & I. F. B. Common. 1991. Lepidoptera (moths and butterflies). In: CSIRO. The Insects of Australia: A textbook for students and research workers vol. 2 pp. 817–915. Melbourne University Press: Carlton (Victoria).

[P93] Pittaway, A. R. 1993. The Hawkmoths of the Western Palaearctic. Harley Books: Colchester.

[PC00] Poinar, G. O., Jr., B. P. M. Čurčic, I. V. Karaman, J. C. Cokendolpher & P. G. Mitov. 2000. Nematode parasitism of harvestmen (Opiliones: Arachnida). Nematology 2 (6): 587–590.

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