THE OLDEST HORSESHOE CRAB: A NEW XIPHOSURID FROM LATE ORDOVICIAN KONSERVAT-LAGERSTÄTTEN DEPOSITS, MANITOBA, CANADA
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چکیده
منابع مشابه
Protecting Horseshoe Crab Habitat
Each spring adult horseshoe crabs migrate from deep bay waters and the Atlantic continental shelf to intertidal sandy beaches to spawn. Horseshoe crabs are an important food source for migrating shorebirds that feed on the eggs, for migrating fish that feed on the eggs and larvae and for Atlantic loggerhead turtles that feed on horseshoe crabs while using the Chesapeake Bay as a summer nursery ...
متن کاملOldest Near-Complete Acanthodian: The First Vertebrate from the Silurian Bertie Formation Konservat-Lagerstätte, Ontario
BACKGROUND The relationships between early jawed vertebrates have been much debated, with cladistic analyses yielding little consensus on the position (or positions) of acanthodians with respect to other groups. Whereas one recent analysis showed various acanthodians (classically known as 'spiny sharks') as stem osteichthyans (bony fishes) and others as stem chondrichthyans, another shows the a...
متن کاملBlood Collection from the American Horseshoe Crab, Limulus Polyphemus
The horseshoe crab has the best-characterized immune system of any long-lived invertebrate. The study of immunity in horseshoe crabs has been facilitated by the ease in collecting large volumes of blood and from the simplicity of the blood. Horseshoe crabs show only a single cell type in the general circulation, the granular amebocyte. The plasma has the salt content of sea water and only three...
متن کاملHemocyanin of the Horseshoe Crab, Limzdus polyphemus
The high molecular weight hemocyanin found in the hemolymph of the horseshoe crab, Limulus polyphemus, is composed of at least eight different kinds of subunits. Ion exchange chromatography at high pH in the presence of EDTA yields five major zones, hemocyanins I to V, three of which are electrophoretically heterogeneous. The subunits have similar molecular weights, 65,000 to 70,000, and their ...
متن کاملA new record of Megatoma (Pseudohadrotoma) graeseri (Coleoptera: Dermestidae: Megatominae) from Manitoba, Canada.
Megatoma (Pseudohadrotoma) graeseri (Reitter, 1887), an eastern Palaearctic species, is newly recorded in North America, with specimens reported from Manitoba, Canada.
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ژورنال
عنوان ژورنال: Palaeontology
سال: 2008
ISSN: 0031-0239
DOI: 10.1111/j.1475-4983.2007.00746.x