Question:
Which of the following are inornate ticks?
(A) Amblyomma integrum
(B) Rhipicephalus (B.) microplus
(C) Haemaphysalis bispinosa
(D) Ixodes ricinus
Choose the correct answer from the options given below:
Which of the following are inornate ticks?
(A) Amblyomma integrum
(B) Rhipicephalus (B.) microplus
(C) Haemaphysalis bispinosa
(D) Ixodes ricinus
Choose the correct answer from the options given below:
(A) Amblyomma integrum
(B) Rhipicephalus (B.) microplus
(C) Haemaphysalis bispinosa
(D) Ixodes ricinus
Choose the correct answer from the options given below:
Show Hint
Genera like Amblyomma and Dermacentor are classically ornate. Genera like Rhipicephalus, Haemaphysalis, and Ixodes are plain and inornate.
Updated On: Jul 23, 2026
- (A), (B) and (C) only.
- (A), (B) and (D) only.
- (A), (B), (C) and (D).
- (B), (C) and (D) only.
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Hard ticks (family Ixodidae) are morphologically categorized as "ornate" or "inornate" based on the patterns on their scutum (dorsal shield).
- Ornate ticks have colorful, metallic, or white patterns on their scutum.
- Inornate ticks have a plain, dark brown, or solid-colored scutum without any decorative patterns.
Detailed Explanation:
Let us classify the given tick species:
- (A) Amblyomma integrum: Ticks belonging to the genus Amblyomma are highly ornate, showing bright, colored spots or patterns on their scutum. Thus, (A) is an ornate tick.
- (B) Rhipicephalus (Boophilus) microplus: This tick has a plain, unpatterned, dark brown scutum. Thus, (B) is an inornate tick.
- (C) Haemaphysalis bispinosa: Haemaphysalis species are uniformly dark-colored and lack any scutal ornamentation. Thus, (C) is an inornate tick.
- (D) Ixodes ricinus: Ixodes species are plain, dark-colored ticks and are always inornate. Thus, (D) is an inornate tick.
Therefore, the inornate ticks are (B), (C), and (D).
Step 2: Final Answer:
The correct combination is (B), (C) and (D) only, which corresponds to Option (D).
Hard ticks (family Ixodidae) are morphologically categorized as "ornate" or "inornate" based on the patterns on their scutum (dorsal shield).
- Ornate ticks have colorful, metallic, or white patterns on their scutum.
- Inornate ticks have a plain, dark brown, or solid-colored scutum without any decorative patterns.
Detailed Explanation:
Let us classify the given tick species:
- (A) Amblyomma integrum: Ticks belonging to the genus Amblyomma are highly ornate, showing bright, colored spots or patterns on their scutum. Thus, (A) is an ornate tick.
- (B) Rhipicephalus (Boophilus) microplus: This tick has a plain, unpatterned, dark brown scutum. Thus, (B) is an inornate tick.
- (C) Haemaphysalis bispinosa: Haemaphysalis species are uniformly dark-colored and lack any scutal ornamentation. Thus, (C) is an inornate tick.
- (D) Ixodes ricinus: Ixodes species are plain, dark-colored ticks and are always inornate. Thus, (D) is an inornate tick.
Therefore, the inornate ticks are (B), (C), and (D).
Step 2: Final Answer:
The correct combination is (B), (C) and (D) only, which corresponds to Option (D).
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