4. Draw and label a compound eye. What arthropod groups possess these? How do appositional and superpositional eyes differ? How do these differences affect their performance? What is special about the eyes of stomatopods? (see Crustacean videos on class Moodle site).

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**Discussion Topic: Compound Eyes in Arthropods**

**Question:**

4. Draw and label a compound eye. What arthropod groups possess these? How do appositional and superpositional eyes differ? How do these differences affect their performance? What is special about the eyes of stomatopods? (see Crustacean videos on class Moodle site). 

---

**Explanation:**

- **Compound Eyes**: These are a type of visual organ found in arthropods, composed of multiple small visual units called ommatidia. Each ommatidium captures a part of the field of view, and collectively, they provide a broad visual perspective.

- **Arthropod Groups with Compound Eyes**: Common arthropods with compound eyes include insects, crustaceans, and some myriapods.

- **Appositional vs. Superpositional Eyes**:
  - **Appositional Eyes**: Common in diurnal arthropods, these eyes have ommatidia that function individually with little light crossover between them. This results in high-resolution images but requires more light.
  - **Superpositional Eyes**: Typical in nocturnal arthropods, these eyes allow for light crossover between ommatidia, enabling vision in low-light conditions but at the cost of image resolution.

- **Performance Differences**:
  - Appositional eyes are better suited for environments with abundant light and for detailed vision.
  - Superpositional eyes are adapted for low-light environments, offering enhanced sensitivity.

- **Unique Features of Stomatopod Eyes**: Stomatopods, commonly known as mantis shrimp, have highly advanced compound eyes capable of complex color vision, including ultraviolet light detection, and even polarized light vision. This sophisticated vision enables them to identify prey and predators effectively.

For further visual understanding, refer to the Crustacean videos available on the class Moodle site.
Transcribed Image Text:**Discussion Topic: Compound Eyes in Arthropods** **Question:** 4. Draw and label a compound eye. What arthropod groups possess these? How do appositional and superpositional eyes differ? How do these differences affect their performance? What is special about the eyes of stomatopods? (see Crustacean videos on class Moodle site). --- **Explanation:** - **Compound Eyes**: These are a type of visual organ found in arthropods, composed of multiple small visual units called ommatidia. Each ommatidium captures a part of the field of view, and collectively, they provide a broad visual perspective. - **Arthropod Groups with Compound Eyes**: Common arthropods with compound eyes include insects, crustaceans, and some myriapods. - **Appositional vs. Superpositional Eyes**: - **Appositional Eyes**: Common in diurnal arthropods, these eyes have ommatidia that function individually with little light crossover between them. This results in high-resolution images but requires more light. - **Superpositional Eyes**: Typical in nocturnal arthropods, these eyes allow for light crossover between ommatidia, enabling vision in low-light conditions but at the cost of image resolution. - **Performance Differences**: - Appositional eyes are better suited for environments with abundant light and for detailed vision. - Superpositional eyes are adapted for low-light environments, offering enhanced sensitivity. - **Unique Features of Stomatopod Eyes**: Stomatopods, commonly known as mantis shrimp, have highly advanced compound eyes capable of complex color vision, including ultraviolet light detection, and even polarized light vision. This sophisticated vision enables them to identify prey and predators effectively. For further visual understanding, refer to the Crustacean videos available on the class Moodle site.
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compound eye is a organ found in arthropods like insects and crustaceans which are meant for vision.

* Compound eye consist of thousands of tiny photoreception units that consist of a cornea and lens and photoreceptor cell to distinguish brightness and color called ommatidia

 

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