Neotylenchidae

Family Neotylenchidae

Revised 01/20/26

Classification:

                  Suborder Tylenchina
                Superfamily Iotonchoidea

                 Neotylenchidae Thorne, 1941

    Synonyms:

Characteristics:

Usually slender, elongate, small species.
Sexes similar.
Stylet usually small, delicate.
Esophagus with slender procorpus, median bulb and isthmus absent. Esophageal glands as long lobes free in the body cavity.
Esophago-intestinal junction close to nerve ring.
One female genital branch, anteriorly developed.
Tail long, conoid to filiform.

Key to Neotylenchidae based on non-entomophagous forms (from Yu et al., 2018)

1. Juveniles and adults obese……….……………… …………………….Fergusobia

Juveniles and young adults not obese, mature adults obese………………Delatylus

Juveniles and adults not obese……………… ………………………………….2

2. Males without bursa or gubernaculum………… ……………………….Gymnotylenchus

Males if present with bursa and gubernaculum…..………………...…………….3

3. Spermatheca present in female. ……………… ………………………………4

Female without spermatheca…………………… ……………… ……..Hexatylus

4. Vulva position over 93% ……………………… …………………..….Deladenus

Vulva position between 83.3 and 92.5%………… ……………….……Rubzovinema

Life Cycle:

Some species have alternative life cycles, one as insect parasitic nematodes and another that feeds on fungi, algae, or root hairs of higher plants. Examples: Fergusobia, Deladenus (Siddiqi, 2000; Yeates et al., 1993).

Go To Dictionary of Terminology

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

References

Siddiqi, M. R. 2000. Tylenchida: Parasites of plants and insects, 2nd ed. Wallingford: CABI Publishing.

Yeates, G.W., T. Bongers, R.G.M. de Goede, D.W.Freckman and S.S. Georgieva. 1993. Feeding habits in soil nematode families - an outline for ecologists. Journal of Nematology 25:315-331.

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