Mesodolichodera

Mesodolichodera	Contents	Rev 10/17/2023
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
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	Distribution	Management
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Classification:

Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Mesodolichoderinae

Mesodolichodera Subbotin & Franco, 2022

Type species of the genus Mesodolichodera andina (Golden, Franco, Jatala & Astogaza, 1983) Subbotin & Franco, 2022

Synonyms:

Morphology and Anatomy:

Cystoid nematodes in which the body wall of the female does not harden into a cyst.

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

Second-stage 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.

Ref: Subbotin and Franco, 2022

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

Type species of the genus, Mesodolichodera andina, reported from a potato field in Peru in 2020. The nematode was moprphologically identical to a nematode described as Thecavermiculatus andinus by Golden et al (1983), which had been reported Jatala et al (1979) as a Globodera sp from several non-solanaceous plants in the vicinity of Lake Titicaca, Peru. Thecavermiculatus was synonymized with Atalodera by de Souza and Huang (1994). Based on morphological and molecular differences between Thecavermiculatus andinus and nematodes in the genus Atalodera, Subbotin and Franco (2022) thransferred it to a new genus (Mesodolichodera) and a new subfamily of the Heterodeiridae, Mesodolichoderinae.

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Economic Importance:

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Feeding:

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Hosts:

Potato and some non-solanaceous plants

For an extensive host range list for this genus, click

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Life Cycle:

For Ecophysiological Parameters for this genus, click

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Damage:

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Management:

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References:

Jatala, P., Franco, J. and Vilca, A. & Ccornejo, W. 1979. Nonsolanaceous hosts of Globodera in the Andes. Journal of Nematology 11: 210-211.

De Souza, R.M. and Huang, S.P. 1994. Description of Atalodera gibbosa n. sp. and synonymization of Thecavermiculatus Robbins, 1978 to Atalodera Wouts & Sher, 1971 (Nemata: Heteroderidae). Fundamental and Applied Nematology 17: 43-56.

Golden, A.M., Franco, J., Jatala, P. and Astocaza, E., E. 1983. Description of Thecavermiculatus andinus n. sp. (Meloidoderidae), a round cystoid nematode from the Andes mountains of Peru. Journal of Nematology 15: 357-363.

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 Nematology 30:31-42.