Dolichodorus miradvulvus		Contents		Rev 11/19/2019
Awl Nematode		Classification		Hosts
		Morphology and Anatomy		Life Cycle
Return to Dolichodorus Menu		Economic Importance		Damage
		Distribution		Management
Return to Dolichodoridae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

 Classification:  

Rhabditida
       Tylenchina
        Tylenchoidea
         Dolichodoridae

            Dolichodorinae

         Dolichodorus miradvulvus Smart & Khoung, 1985

Synonyms:
      None.

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Morphology and Anatomy:

	Dolichodorus miradvulvus A) Anterior portion of female. B) Anterior portion of male. C) End of male gonad. D) Enlargement of apparent seminal vesicle portion of male gonad. E) Male tail showing sclerotized-appearing junction of bursa and body. F) Male tail showing spicules and gubernaculum.
Female: Median bulb well-developed.   Excretory pore level with center of median bulb. Basal esophageal bulb elongate-pyriform. Not overlapping to slight ventral overlap of intestine. Vulva a transverse slit in an oval depression which has anterior and posterior pouches that appear to be sclerotized. Cuticle on ventral surface anterior and posterior to vulva with up to 10 deep grooves separated by two or three annules. (miradvulvus = unusual near vulva).  Interior of vagina with strengthening ridges. Ovaries paired, outstretched, spermathecae present. Tail tapering abruptly then conoid.     Male: Similar to female. Spicules and gubernaculum slightly arcuate. Gubernaculum with reflexed distal tip. Males have unique caudal alae, well-developed. Tail tip not bifurcate.	Dolichodorus miradvulvus  A) Female gonad. B) Spermatheca C) Vulval region with grooves and pouches anterior and posterior to vulva, strengthening ridges in the vagina and muscles attached to the vaginal wall and body wall. D) Female tail, ventral view. E) Female tail, lateral view. F) Juvenile tail withgradual tapering. G) Juvenile tail with abrupt tapering. Drawings and photographs from Smart and Khoung, 1985
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

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Distribution:

Recorded soil and plant samples of Anubias nana Engler from a commercial aquarium plant nursery in Florida. Can be cultured on Zea mays.

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Economic Importance:

Causes damage to Anubias nana.

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Feeding:

Ectoparasite mainly at root tip; nematode has long stylet.

Feeding of D. miradvulvus at root initials of the aquatic plant Anubias nana can result in complete destruction of the root system (Smart and Khuong, 1984, 1985; Smart and Nguyen, 1991).

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Hosts:

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Life Cycle:

Ecophysiological Parameters:

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Damage:

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Management:

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

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References:

Smart G.C. Jr. and N.B. Khoung. 1984. A new awl nematode inhibits rooting of the aquarium plant Anubias nana.  Proceedings of the First International Congress of Nematology, Guelph, Ontario, Canada Aug 5-10, 1984. 

Smart, G.C., Khoung, N.B. 1985. Dolichodorus miradvulvus n. sp. (Nematoda, Tylenchida) with a key to the species. Journal of Nematology 17:29-37.

Smart G.C. and K.B. Nguyen. 1991. Sting and awl nematodes. Pp. 627-668 In Nickle W.R. (ed.), Manual of Agricultural Nematology. Marcel Dekker Inc., NY.

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Copyright © 1999 by Howard Ferris.
Revised: November 19, 2019.