Genus Aphelenchoides

To view images go to: Image List

 

ORDER RHABDITIDA
INFRAORDER TYLENCHOMORPHA
            Family Aphelenchoididae
                        Genus Aphelenchoides

 

Genus Aphelenchoides
Fischer, 1894

"Diagnosis: Habitus of females straight to ventrally arcuate. Habitus of males 'walking stick'-shaped: tail region sharply curved ventrally. Cuticula finely annulated. Lateral field often with four incisures, sometimes with two or three. Cephalic region usually rounded and slightly offset, cephalic framework weak, six equal-sized lips. Stylet slender, usually with basal knobs or swellings, about 10-12 micrometers long. Vulva usually at 60-75% of the body length, only exceptionally more posterior. Tail conoid with a variable terminus, which may be bluntly or finely rounded, digitate or bifurcate or with ventral projection. One or more mucrons of various shapes may be present. Spicules thorn-shaped Typically three pairs of caudal papillae, one pair adanal, one pair subterminal and the other in between. Bursa absent (diagnosis modified after Hunt, 1993)." From Bert and Borgonie 2006

 “Diagnosis: Aphelenchoididae. Lip region continuous or slightly set off.  Lateral fields usually with 4 incisures.  Spear slender, with or without weak knobs.  Median bulb spheroid, usually about as wide as neck cavity.  Basal part of esophagus extended back in a long lobe. Hemizonid posterior to excretory pore.  Ovary outstretched. Posterior uterine branch usually present.  Males without bursa or gubernaculum. Terminus bluntly rounded, often bearing a mucro. Phasmids usually obscure, located near terminus.”Type species: Aphelenchoides kuehnii  Fischer, 1894.”  Description- Thorne and Malek, 1968 and Powers and Mullin website http://nematode.unl.edu/


Aphelenchoides bicaudatus was found in Dececember 12, 2007 in KBS T7-6.  Description in http://nematode.unl.edu/aphelbic.htm, and many pictures in both computers.

References:

Bert, W. and G. Borgonie. Order Rhabditida: Suborder Tylenchina.  2006.  In: Eyualem Abebe, Traunspurger W., and Andrassy I. (eds) Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing, Cambridge, MA, pp. 648-695

Powers T. and P. Mullin. Plant and Insect Parasitic Nematodes. University of Nebraska Nematology Website. http://nematode.unl.edu/

Michigan State University
  • Spartans Will.
  • © Michigan State University

MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential.

Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Quentin Tyler, Director, MSU Extension, East Lansing, MI 48824. This information is for educational purposes only. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.

The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707.

We comply with the Federal Trade Commission 1998 Children’s Online Privacy Protection Act (COPPA).