Tachypleus gigas
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Tachypleus gigas, commonly known as the Indo-Pacific horseshoe crab, Indonesian horseshoe crab, Indian horseshoe crab, or southern horseshoe crab, is one of the four extant species of horseshoe crab.
Tachypleus gigas
Illustrations of male from above and below. Notice that the illustration from below incorrectly shows all walking legs as scissor-like, as in females (in males, the two frontal pairs of walking legs have hooks)
Male found dead in Bako National Park, Malaysia
Individual horseshoe crab found dead on Indonesian shore
Tachypleus
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Tachypleus is a genus of south, southeast and east Asian horseshoe crabs in the family Limulidae.
Tachypleus gigas
…Tachypleus gigas was first described by Otto Friedrich Müller in 1785. It was originally placed in the genus Limulus, but was transferred to the genus Tachypleus by Reginald Innes Pocock in 1902. Tachypleus gigas is estimated to have diverged from the other Asian species of horseshoe crab 52.5 million years ago…
Tachypleus tridentatus