Gourt > Science > Biology > Flora and Fauna > Animalia > Arthropoda > Merostomata
Merostomata is a class of marine Chelicerata which includes horseshoe crabs and eurypterids. It includes only four living species but dozens of fossil species mainly from the Paleozoic. The class Merostomata is slowly being abandoned in favour of splitting it into two classes, Xiphosura and Eurypterida. This is because Merostomata is thought to be paraphyletic, with the Eurypterida more closely related to the Arachnida, forming the group Cryptopneustida (Boudreaux, 1979). Inertia, however, has prevented this change from being incorporated in textbooks, which continue to use the traditional "Merostomata".
The Merostomata are the only chelicerates to possess compound eyes; the arachnids have lost the ancestral arthropods' fully developed latero-anterior compound eyes.
References
More on [ Merostomata ]
Arthropoda Chelicerata Crustacea Uniramia Malacostraca Merostomata วà¸à¹à¸§à¸µà¸¢à¸à¹à¸à¸«à¸±à¸§à¹à¸à¹à¸¡à¹à¸à¸«à¸¡à¸à¹à¸¥à¹à¸§!!!!
Gothix51 (Gothix Mumu) Sun, 20 Dec 2009 16:28:54 -0000
Arthropoda Chelicerata Crustacea Uniramia Malacostraca Merostomata วนเวียนในหัวเต็มไปหมดแล้ว!!!!
Merostomata - Brief description of the class, from the Animal Diversity Web.
The Horseshoe Crab - Limulus polyphemus - Promotes public awareness of the four remaining species. Natural history, conservation, medical uses, education, sightings, stories, images, glossary, and bibliography.
Meta Description: [ A comprehensive exploration of horseshoe crab natural history, anatomy and conservation: contains research and educational material, plus collections of poems, images and activities. ]
The Horseshoe Crab - Limulus polyphemus - Brief profile of species biology and ongoing research, with a photo.
Meta Description: [ The Maryland Fisheries Resource Office (MFRO),
located in Annapolis, coordinates fish tagging programs in cooperation with
federal and state agencies along the eastern seaboard. ]
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