| 词条 | Bradycneme |
| 释义 |
| name = Bradycneme | fossil_range = Late Cretaceous, {{fossilrange|70|66}} | parent_authority = Harrison & Walker, 1975 | genus = Bradycneme | authority = Harrison & Walker, 1975 | species = draculae }} Bradycneme is a genus of theropod dinosaur from the Maastrichtian-age Upper Cretaceous Sânpetru Formation of the Hațeg Basin, Transylvania, Romania. It is known only from a partial right lower leg (specimen BMNH A1588), which its original describers believed came from a giant owl. HistoryHarrison and Walker described two "bradycnemids" from Romania in 1975: B. draculae and Heptasteornis andrewsi. These specimens had initially been assigned to the supposed pelecaniform bird Elopteryx nopcsai. Bradycneme means "ponderous leg", from Ancient Greek bradys (βραδύς) "slow, ponderous" + kneme (κνήμη) "leg", as the holotype, BMNH A1588, a 37.8 millimetres wide distal tibiotarsus found by Maud Eleanora Seeley, would be very stout if the animal had been an owl, indicating a body height of two metres.[1] The specific name draculae is derived from Romanian dracul, "the dragon" and refers to Dracula.[1] Starting with Pierce Brodkorb,[2] the specimens were soon compared to small theropod dinosaurs. These three genera Bradycneme, Elopteryx and Heptasteornis have been synonymized, split, and reassessed numerous times since then[3] in part because of the fragmentary nature of the remains; there exist three proximal femora and three distal tibiotarsi, which may belong to one, two or three species. Usually, at least one of them is considered to be a troodontid. In the most recent assessments, Bradycneme and Heptasteornis were found to be the same and most likely basal members of the Tetanurae in one study,[4] but Darren Naish did not follow the synonymy and found Heptasteornis to be an alvarezsaurid, while classifying Bradycneme as an indeterminate maniraptoran.[5] In a 2011 classification, Tom Holtz assigned Bradycneme to the Alvareszauridae along with Heptasteornis.[6] Footnotes1. ^1 Harrison & Walker (1975) 2. ^Brodkorb (1978): pp.223-224 3. ^Paul (1988), Weishampel et al. (1991), Le Loeuff et al. (1992), Csiki & Grigorescu (1998), Naish & Dyke (2004) 4. ^Csiki & Grigorescu (1998) 5. ^Naish & Dyke (2004) 6. ^Holtz, Thomas R. Jr. (2011) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages, Winter 2010 Appendix. References
8 : Alvarezsaurids|Late Cretaceous dinosaurs of Europe|Fossil taxa described in 1975|Taxa named by Colin Harrison|Taxa named by Cyril Walker|Maastrichtian life|Paleontology in Romania|Hațeg fauna |
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