1
Which of the following nematode has “cephalic setae’?
(A) . Atylenchus
(B) . Tylenchus
(C) . Eutylenchus
(D) . Malenchus
Choose the correct answer from the options given below:
EXPLANATION
Nematode Cuticle, Integument, Hypodermis, Sen
- Cephalic Setae in Tylenchida:
- Sensory Setae: Cephalic setae are elongated, hair-like sensory projections on the head (cephalic region). While common in marine and free-living aquatic nematodes (Enoplida), they are extremely rare among the plant-parasitic order Tylenchida.
- Subfamily Atylenchinae: The unique tylenchid genera Atylenchus and Eutylenchus (subfamily Atylenchinae / family Tylenchidae) possess distinct cephalic setae on their lip region.
- Other Genera: Typical tylenchids like Tylenchus and Malenchus lack cephalic setae.
- Conclusion: Genera (A) and (C) only possess cephalic setae (Option 1).
Correct option: (1) (A), and (C) only,
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