5ANDERSON L I. A new specimen of the Silurian synziphosurine arthropod Cyamocephalus[J]. Proceedings of the Geologists Association, 1999, 110: 211-216.
6SIEGFRIED P. A horseshoe crab from the upper Carboniferous of Ibbenbueren, Westphalia[J]. German Palaeontologische Zeitschrift, 1972, 46 (3-4): 180-185 (in German).
7EWINGTON D L, CLARKE M J, BANKS M R. A late permian fossil horseshoe crab (Paleolimulus: Xiphosura)from Poatina, Great Western Tiers, Tasmania[J]. Papers and Proceedings of the Royal Society of Tasmania, 1989,123: 127-131.
8WALLS E A, BERKSON J, SMITH S A. The horseshoe crab, limulus polyphemus: 200 million years of existence,100 years of study[J]. Reviews in Fisheries Science, 9002,10 (1): 39-73.
9KANCHANAPONGKUL J, KRITTAYAPOOSITPOT P.An epidemic of tetrodotoxin poisoning following ingestion of the horseshoe crab Carcinoscorpius rotundicauda [J].Southeast Asian Journal of Tropical Medicine & Public Health. 1995, 26 (2): 364-367.