Xiphosura


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Related to Xiphosura: Limulidae, Merostomata, Symphyla, Eurypterids

Xiphosura

the group containing the king crabs, aquatic ARACHNIDS that occur as fossils as far back as the Palaeozoic era.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
3.03 Xiphosura Limulus polyphemus 6.06 1.85 Huevos de Xiphosura Amphipoda Gamarideos spp.
Cambios alimenticios en tres especies de Sphoeroides (Tetraodontiformes: Tetraodontidae) posterior al huracan Isidoro en Bocana de la Carbonera, sureste del Golfo de Mexico
Originally, they were regarded as Xiphosura and Gastropods imprints.
Pistas de Notostraceos en ambientes de playa en la Cuenca de Lodeve (Francia)
Marine microalgae as dietary supplements in the culture of juvenile Chinese horseshoe crabs, Tachypleus tridentatus (Xiphosura).
GROWTH PERFORMANCE AND FEED UTILIZATION OF LOW-COST ARTIFICIAL FEEDS FOR JUVENILE ASIAN HORSESHOE CRAB CULTURE
This suggests an expansion of opsins in Xiphosura occurred after their split from the rest of Euchelicerata.
Opsins and Their Expression Patterns in the Xiphosuran Limulus polyphemus
Xiphosura.--Horseshoe crabs are unique among living chelicerates in that there are far more fossil species than the four living ones.
How many species of fossil arachnids are there?
Some debate exists, however, as to whether the relatively large and varied ommatidial units of Xiphosura and Myriapoda are an ancestral trait, from which the more stringently organized insect eyes evolved (Harzsch et al., 2005), or whether they are derived from an ancestor with more precisely regulated ommatidial cell identity (Paulus, 2000), as is known to be the insect-crustacean ancestral state.
Molecular Evolution of Spider Vision: New Opportunities, Familiar Players
Experimentally derived estimates of growth by juvenile Tachypleus tridentatus and Carcinoscorpius rotundicauda (Xiphosura) from nursery beaches in Hong Kong.
Proximate causes of sexual size dimorphism in horseshoe crabs (Limulus polyphemus) of the Delaware Bay
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