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)

Limulus moluccanus (Clusius) = Tachypleus gigas (Müller, 1785), adult from above (left) / below (right)
Date 1904
Source Kunstformen der Natur (1904), plate 47: Aspidonia
Author Ernst Haeckel (1834–1919)
Source: https://commons.wikimedia.org/wiki/File:Haeckel-Tachypleus_gigas-1024.jpg

Indo-Pacific horseshoe crab (Tachypleus gigas), also known as the Indonesian horseshoe crab, Indian horseshoe crab, or southern horseshoe crab, is one of the four extant species of horseshoe crabs. It is found in coastal water in South and Southeast Asia at depths to 40 m.

Order: Xiphosura
Family: Limulidae
Genus: Tachypleus
Species: Tachypleus gigas (Müller, 1785)
Synonyms
- Limulus gigas Müller, 1785
- Limulus moluccanus Latreille, 1802