<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Robison, R. A.</style></author><author><style face="normal" font="default" size="100%">E.O. Wiley III</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A new arthropod, Meristosoma: More fallout from the Cambrian explosion</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Paleontology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Anatomy and Histology - Gross anatomy 62800</style></keyword><keyword><style  face="normal" font="default" size="100%">Animal distribution - 63000</style></keyword><keyword><style  face="normal" font="default" size="100%">Arthropoda [75000] Population Studies Biogeography Evolution and Adaptation General Life Studies Morphology Paleobiology Physiology Systematics and Taxonomy Invertebrata Animalia 00504</style></keyword><keyword><style  face="normal" font="default" size="100%">Evolution 11102</style></keyword><keyword><style  face="normal" font="default" size="100%">General biology - Taxonomy</style></keyword><keyword><style  face="normal" font="default" size="100%">I</style></keyword><keyword><style  face="normal" font="default" size="100%">Invertebrata: general and systematic - Arthropoda: general 64052</style></keyword><keyword><style  face="normal" font="default" size="100%">nomenclature and terminology 01500</style></keyword><keyword><style  face="normal" font="default" size="100%">Paleozoology - 63552</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1995</style></year></dates><number><style face="normal" font="default" size="100%">3</style></number><volume><style face="normal" font="default" size="100%">69</style></volume><pages><style face="normal" font="default" size="100%">447-459</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">New Middle Cambrian fossils demonstrate unusual tagmosis within the Arthropoda. Rare specimens from the Spence Shale of northern Utah are assigned to Meristosoma paradoxum n. gen. and sp. One specimen from the Marjum Formation of west-central Utah is assigned to Meristosoma sp. These taxa are further assigned to the new family Meristosomatidae. Meristosoma, which reached 17 cm in length, is characterized by a short anterior shield, a long thorax with 36 or more articulating segments, and a posterior shield with as many as 11 fused segments. Its short anterior shield and long, multisegmented thorax have a myriapodan aspect, but Meristosoma differs from all myriapods by its posterior tagmosis. In dorsal view, its posterior shield is most like that of some macropygous trilobites, but Meristosoma differs from all trilobites by having a shorter anterior shield, ringed thoracic segments without trilobation, and no ventral doublure. Phylogenetic analysis indicates that Meristosoma is a primitive and basal arthropod. A more precise taxonomic assignment is hampered by a lack of information about its limb morphology.</style></abstract><notes><style face="normal" font="default" size="100%">Article</style></notes></record></records></xml>