Radopholus bridgei

Radopholus bridgei	Contents	Rev 10/29/2008
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Radopholus Menu	Economic Importance	Damage
	Distribution	Management
Return to Pratylenchidae Menu	Feeding	References
Go to Nemaplex Home Page

Classification:

      Tylenchida
       Tylenchina
        Tylenchoidea
         Pratylenchidae
          Pratylenchinae
           Radopholus bridgei Siddiqi & Hahn, 1995

Back to Top

Morphology and Anatomy:

Similar to Pratylenchus in general shape and size, but female has two ovaries.

Sexual dimorphism is marked in this genus.

Female: The female burrowing nematode is 650-800 µm long and 20-24 µm in diameter.

R. bridgei female lip region. Source: Paul de Ley, UC Riverside.

R. bridgei female metacorpus region. Source: Paul de Ley, UC Riverside.

The head is rounded and slightly flattened, offset by a slight constriction.
The esophageal glands overlap the intestine dorsally.
There are two ovaries outstretched anterior and posterior.
The spermatheca is spherical, usually packed with rod-shaped sperm.
The tail shape is elongate conoid ending in a narrowly rounded terminus. The posterior end of the tail has a characteristic hyaline region.

Males: Males do not resemble females in appearance. They are 500-600 µm long and more slender than the females.

R. bridgei male lip region. Source: Paul de Ley, UC Riverside.

The head is rounded, non-sclerotized and off-set by a conspicuous constriction
The stylet of the male is slender and indistinctand has small knobs which are difficult to see.
Lip region is conical.
Long dorsal overlap.
Male has a bursa.
Tail tip is acute and rounded.