| 词条 | Boreonykus |
| 释义 |
| fossil_range = Late Cretaceous {{fossil range|73}} | image = | image_caption = | taxon = Boreonykus | authority = Bell & Currie, 2015 | type_species = Boreonykus certekorum | type_species_authority = Bell & Currie, 2015 }}Boreonykus is an extinct genus of dromaeosaurid dinosaur, that lived during the Late Cretaceous in the area of present Canada.[1] Fragmentary dromaeosaurid remains were discovered in the eighties at the Pipestone Creek site in central Alberta during excavations of a bonebed containing at least twenty-seven individuals of the ceratopsid Pachyrhinosaurus lakustai.[1] They were initially partly referred to a Saurornitholestes sp.[1] The type species Boreonykus certekorum was named and described by Phil Bell and Philip John Currie in 2015.[2] The genus name is a variation of "Boreonychus", "northern claw". The specific name certekorum honors the Certek Heating Solutions company, that works in the oil industry, and provided financial support for the excavations.[2] The holotype specimen of Boreonykus, TMP 1989.055.0047, was found in a layer of the Wapiti Formation in central Alberta, which dates from the late Campanian, 73.27 ± 0.25 million years ago. It consists of a right frontal bone. Fourteen loose teeth have been referred to the species, as well as several postcranial bones, perhaps of the same individual: the specimen TMP 1988.055.0129, a rear caudal vertebra; UALVP 53597, a claw of the second finger, and the specimen TMP 1986.055.0184.1, a sicle claw of the foot.[2] A single autapomorphy, unique derived trait, was indicated: the ridges bordering the fronts of the depressions around the supratemporal fenestrae form an acute angle of 55° together, pointing to the rear.[2] Boreonykus was, within the Dromaeosauridae, placed in the Velociraptorinae. It was seen as both an indication of faunal provincialism and a quick species turn-over rate.[2]References1. ^Ryan M.J. and Russell, A.P., 2001, "The dinosaurs of Alberta (exclusive of Aves)", In: Tanke and Carpenter (eds.), Mesozoic Vertebrate Life: New Research Inspired by the Paleontology of Philip J. Currie, Indiana University Press, pp 279-297 {{Dromaeosauridae|E.}}{{Taxonbar|from=Q21977554}}2. ^1 2 3 4 5 6 Bell, P. R., and P. J. Currie. 2015. A high-latitude dromaeosaurid, Boreonykus certekorum, gen. et sp. nov. (Theropoda), from the upper Campanian Wapiti Formation, west-central Alberta. Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2015.1034359. 6 : Eudromaeosaurs|Late Cretaceous dinosaurs of North America|Taxa named by Philip J. Currie|Paleontology in Alberta|Campanian genus first appearances|Campanian genus extinctions |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。