11 Questions
How many eyes does the horseshoe crab have on top of its prosoma?
Ten
Which part of the horseshoe crab is often mistaken as a stinger but is actually used for steering and flipping?
Telson
How many pairs of appendages does the horseshoe crab have on the underside of its prosoma for walking?
Five
Which order of Merostomata includes horseshoe crabs like Carcinoscorpius rotundicauda and Tachypleus tridentatus?
Xiphosura
How many fossil species from the Paleozoic Era are included in the extinct order Eurypterida of Merostomata?
200
What is the function of the telson on a horseshoe crab?
To steer and flip the crab
Which body segment of the horseshoe crab is covered by a dorsal carapace?
Prosoma
How many pairs of appendages does the horseshoe crab have on the underside of its prosoma for walking?
Five pairs
Which order of Merostomata includes the extinct Gigantostraca, with 200 fossil species from the Paleozoic Era?
Eurypterida
What is the primary purpose of the chelicera in a horseshoe crab?
Moving food into the mouth
How many body segments are present in a horseshoe crab?
Three
Test your knowledge on the features of Class Merostomata, including large marine chelicerates with book gills, prosoma structure, opisthosoma characteristics, and appendages of horseshoe crabs.
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