Subfamily Mesodolichoderinae
Classification:
Tylenchida
Tylenchina
Tylenchoidea
Heteroderidae
Mesodolichoderinae Subbotin & Franco, 2022
Synonyms:
Morphology and Anatomy:
- No cyst formed.
- Female body contains eggs and egg sac not observed.
- Anus and vulva are terminal and well separated from each other.
- Vulval slit short.
The subfamily Mesodolichoderinae differs from subfamily
Punctoderinae in the absence of a cyst stage
It differs from subfamily Ataloderinae in the
long vulva-anus distance and short vulval slit.
Female:
- Body round to oval, smooth , rounded posteriorly, with small neck
protruding anteriorly, white, becoming yellowish in some specimens.
- No cyst formed. Eggs retained in body. Egg sac not observed.
- Head offset, with four annuli and a labial disc.
- Stylet strong, with heavy, large knobs sloping posteriorly.
- Cuticular surface in posterior part of body, and especially in the
vulval-anal area, consists of a lace-like pattern overlaying random
punctation.
- Anus and vulva terminal, well separated by 44-91 um from each other.
- Vulval slit short (6-8 um), surrounded by a small smooth area with 4-5
annuli. Inner vulval lips faint, outer vulval lips absent
Male:
- Body not twisted.
- Head region faintly annulated,
- Lateral field with four incisures.
- Tail short, rounded
Juveniles:
- Body short, 362-437 um
- Pharyngeal glands not restricted to ventral side of body.
- Lateral field with four incisures,
- Phasmids in foem of small pits with lens-like structure in the middle
longitudinal band
- Tail short, conically tapering to a rounded terminus.
Biology:
References
Subbotin S,A. and Franco, J. 2022. Molecular characterisation of the
sedentary cystoid nematode, Mesodolichodera andina (Golden, Franco, Jatala &
Astogaza, 1983) gen. n., comb. n. (Tylenchida: Heteroderidae) parasitising
potatoes in the Andes. Russian Journal of Nematology30:31-42.
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