蒙古Baruungoyot和Nemegt组晚白垩世甲龙科恐龙 Zaraapelta nomadis游牧 猬甲龙（新属、新种） The ankylosaurid dinosaurs of the Upper Cretaceous Baruungoyot and Nemegt formations of MongoliaVICTORIAM. ARBOUR, PHILIP J. CURRIE and DEMCHIG BADAMGARAV AbstractThe discovery of a new ankylosaurid skull withsome unusual features from the Baruungoyot Formation of Mongolia prompted asystematic review of ankylosaurid specimens from the Baruungoyot and Nemegtformations. Dyoplosaurus giganteus was found to possess no diagnostic featuresand is regarded as a nomen dubium. The holotype of Tarchia kielanae (previouslysynonymized with Tarchia gigantea) has one autapomorphy, an accessorypostorbital ossification with surrounding furrow, and Tar.kielanae is hereconsidered a valid species, making the combination Tar.gigantea unnecessary.An accessory postorbital ossification is also found in the holotype ofMinotaurasaurus ramachandrani, and this species is here considered a juniorsynonym of Tar.kielanae. The newly described skull from the BaruungoyotFormation forms the holotype of a new genus and species, Zaraapelta nomadisgen. et sp. nov., diagnosed by unusual bilayered ornamentation on the squamosalhorn and extensive postocular ornamentation. Two distinct tail club handlemorphotypes are present in the Nemegt Formation and probably represent two differentspecies. However, it is impossible to assign either tail club morphotype to thesingle valid species from the formation, Saichania chulsanensis, because of alack of overlapping material. A revised phylogenetic analysis including newlyidentified characters found Zaraapelta nomadis to be most closely related toTar.kielanae.

美国新墨西哥州的晚白垩世新甲龙科恐龙和对北美西部晚白垩世甲龙科多样性的含意 Ziapelta sanjuanensis圣胡安 齐亚甲龙（新属、新种） A New Ankylosaurid Dinosaur from the Upper Cretaceous (Kirtlandian) of New Mexico with Implications for Ankylosaurid Diversity in the Upper Cretaceous of Western North AmericaVictoriaM. Arbour, Michael E. Burns, Robert M. Sullivan, Spencer G. Lucas, Amanda K.Cantrell,JoshuaFry, Thomas L. Suazo
AbstractA new ankylosaurid (Ankylosauria: Dinosauria),Ziapelta sanjuanensis, gen. et sp. nov., is based on a complete skull, anincomplete first cervical half ring, a possible fragment of the second cervicalhalf ring, and additional fragmentary osteoderms. The holotype specimen is fromthe Upper Cretaceous (Upper Campanian, Kirtlandian Land-Vertebrate Age) KirtlandFormation (De-na-zin Member) at Hunter Wash, San Juan Basin, in northwesternNew Mexico, USA. Diagnostic characters of Ziapelta include: a large, prominenttriangular median nasal caputegulum; a mixture of flat and bulbous frontonasalcaputegulae; ventrolaterally oriented squamosal horns with a sharp, prominentdorsal keel; and the ventral surface of basicranium with three prominentanteroposteriorly oriented fossae. A phylogenetic analysis suggests thatZiapelta is not closely related to the other ankylosaurid from the De-na-zinMember, Nodocephalosaurus, but allies it to the northern North Americanankylosaurids Ankylosaurus, Anodontosaurus, Euoplocephalus, Dyoplosaurus, andScolosaurus.

远隔大洋的兄弟

明明没发现尾巴，那个尾槌是怎么出来的