Mesodolichodera andina 

 

Contents

 

Rev 10/17/2023

  Classification Hosts
Morphology and Anatomy Life Cycle

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Economic Importance Damage
Distribution Management
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Classification:

Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Heteroderinae

Mesodolichoderinae

           Mesodolichodera andina (Golden, Franco, Jatala & Astogaza, 1983) Subbotin & Franco, 2022

Type species of the genu

    Synonyms:

Thecavermiculatus andinus Golden, Franco, Jatala & Astogaza, 1983

Dolichodera andinus (Golden, Franco, Jatala & Astogaza, 1983) Wouts, 1985

 Atalodera andina (Golden, Franco, Jatala & Astogaza, 1983) de Souza & Huang, 1994.

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Morphology and Anatomy:

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

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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

 

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

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Distribution:

Mesodolichodera andina was 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

 
For an extensive host range list for this species, click
 
   
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Life Cycle:

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters

 

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Damage:

 

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Management:

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click

 

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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.

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Copyright © 1999 by Howard Ferris.
Revised: October 17, 2023.