Term
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Definition
Chelicerata
Merostomata (horseshoe crabs)
Limulus |
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Term
| Merostomata Outside Body Structure |
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Definition
Lack antennae and mandibles
First pair of appendages are chelicerae
Second pair of appendages are pedipalps
Four pairs of walking legs
Spiked telson and plate-like gill opercula on abdomen
Marine |
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Term
|
Definition
Cephalothorax (fused head and thorax)
Abdomen |
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Term
| Two Lateral Compound Eyes |
|
Definition
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|
Term
|
Definition
Detects only shadows
Differentiates between light and dark areas |
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Term
|
Definition
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Term
|
Definition
Aids in swimming
Aerates book gills |
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