Merostomoidea

Merostomoidea; Temporal range: Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata?
Class:	Merostomoidea†; Størmer, 1944
Orders
	Limulavida; Emeraldellida;

Merostomoidea is a paraphyletic group of fossil arthropods. They have been described as a transitional form between trilobites and true chelicerates.

Sources

https://web.archive.org/web/20101221002449/http://palaeos.com/Invertebrates/Arthropods/Arachnomorpha.html#Merostomoidea

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