Geocenamus angelescresti  

 

Contents

 

Rev 11/19/2019

  Classification Hosts
Morphology and Anatomy Life Cycle

Return to Geocenamus  Menu

Economic Importance Damage
Distribution Management
Return to Merliniidae Menu Feeding  References
    Go to Nemaplex Main Menu   Go to Dictionary of Terminology

 

Classification:

Rhabditida
       Tylenchina
        Tylenchoidea
           Merliniidae
             Merliniinae

                     Geocenamus angelescresti Chitambar and Ferris, 2005

 

Back to Top

Morphology and Anatomy:

.

Characterized by a round to hexagonal labial disc with six bulging sectors, lateral sectors of first labial annule smaller than the submedian sectors, six to eight labial annules.

Distinct deirids.

Stylet length 45-57 µm, cone greater than half the length.

Body length 666-996 µm.

Lateral field with or without areolation of outer bands on tail, and a rounded.

Smooth tail terminus. 

Labial region bulbous.  SEM face view with well-marked, round labial disc.  First lip annule divided into six sectors, lateral sectors smaller.  Labial framework weakly developed.  


 

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

 

   
Photographs by John Chitambar, CDFA
Male: Similar to female but more ventrally arcuate. 

Spicules proximally straight, distal quarter ventrally curved. 

Gubernaculum crescent-shaped, not protruding from cloaca, thickened distally, tapered, narrow proximally.

Bursa peloderan, finely annulated.

[Ref: Chitambar and Ferris (2005).]

Back to Top

Distribution:

San Gabriel Mountains of southern California

 

Back to Top

Economic Importance:

 

Back to Top

Feeding:

Migratory ectoparasite

Back to Top

Hosts:

 Pinus ponderosa (western yellow pine) and Arcotostaphylos patula (greenleaf manzanita).
 
For an extensive host range list for this species, click

 


 
Back to Top

Life Cycle:

Ecophysiological Parameters:

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

 

Back to Top

Damage:

 

Back to Top

Management:

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

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

 

Back to Top

References:

Chitambar, J.J. and H. Ferris. 2005. Geocenamus angelescresti n. sp., a diagnostic key and compendium to the species of the genus Geocenamus Thorne and Malek, 1968 (Nematode Belonolaimidae) Journal of Nematology 37:429-437.

 

 

 

Back to Top

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