Q199
Two nerve rings are present in
A.
Longidorus sp.
B.
Xiphinema sp.
C.
Ditylenchus sp.
D.
Both A and B
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Two nerve rings are present in Longidorus sp. and Xiphinema sp.Longidorus is a genus of needle nematodes. Some of its species are plant pests. They may also transmit important plant viruses such as the potato virus U or the cacao necrosis virus.
Xiphinema is a genus of ectoparasitic root nematodes commonly known as dagger nematodes.
They have a long protrusible odontostyle, with 3 basal flanges at the posterior end of the stylet and relatively posterior guiding nerve rings. The two nerve rings of the hypostomal nervous system.