ORDER TYLENCHIDA
Constructed and maintained by KHUONG
B. NGUYEN
University of Florida
The illustrations (collected from different
sources mentioned in the text), the key and
the diagnoses in
this document were prepared for students in the course Nematode
Taxonomy and Systematics. Other users are welcome.
Diagnosis:
- Dorsal esophago opening between stylet knobs and median bulb
- Stylet with knobs
- Female gonads single or double, when single postvulva sac not well
developed
- Esophagus with procorpus, metacorpus, isthmus and glandular portion
- Male mostly with bursa
- Mostly plant parasites.
SUBORDER: TYLENCHINA
- As in order
SUPERFAMILY:
CRICONEMATOIDEA
- Lip region poorly developed
- Esophagus criconematoid (Fig)
- Bodywith large annules, ring, sometimes with sheath, striation exists
in one group, Tylenchulidae
- Gonad single.
There are two families:
- Criconematidae
- Tylenchulidae
SUPERFAMILY ATYLENCHOIDEA
SUPERFAMILY:
TYLENCHOIDEA
- Lip region pronounced distinguishing from body
- Esophagus tylenchoid (Fig)
- Males usually with bursa
- Gonads one or 2.
There are 8 families:
- Anguinidae
- Belonolaimidae
- Dolichodoridae
- Ecphyadophoridae
- Hoplolaimidae
- Heteroderidae
- Pratylenchidae
- Tylenchidae
SUBORDER : SPHAERULARIINA (insect
parasitic nematodes)
- As in order
- Nematodes in this suborder have 3 forms: 2 freeliving foms, male and
female found in the nature and
parasitic female found in the body of insects.
There are 5 families:
- Allantonematidae
- Fergusobiidae
- Iotonchidae
- Parasitylenchidae
- Sphaerulariidae
Updated 14 February 2003
