寐猎龙属
寐猎龙属![]() | |
---|---|
![]() | |
正模标本化石遗骸及骨骼图示 | |
科学分类 ![]() | |
界: | 动物界 Animalia |
门: | 脊索动物门 Chordata |
纲: | 蜥形纲 Sauropsida |
总目: | 恐龙总目 Dinosauria |
目: | 蜥臀目 Saurischia |
亚目: | 兽脚亚目 Theropoda |
演化支: | 真手盗龙类 Eumaniraptora |
科: | †伤齿龙科 Troodontidae |
亚科: | †伤齿龙亚科 Troodontinae |
属: | †寐猎龙属 Hypnovenator Kubota, Kobayashi & Ikeda, 2024 |
模式种 | |
†松大氏寐猎龙 Hypnovenator matsubaraetoheorum Kubota, Kobayashi & Ikeda, 2024
|
寐猎龙(学名:Hypnovenator,意为“沉睡的猎人”)是伤齿龙科兽脚类恐龙已灭绝的一个属,来自日本早白垩世(阿尔布阶)大山下组。属下包括单一物种松大氏寐猎龙(H. matsubaraetoheorum),所知于一具不完整骨骼。寐猎龙是日本目前唯一已知的伤齿龙科,代表该演化支可确认的最古老成员。
发现与命名
![](http://images.weserv.nl/?url=//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Locality_maps_and_geology_in_Tambasasayama.webp/220px-Locality_maps_and_geology_in_Tambasasayama.webp.png)
寐猎龙正模标本MNHAH D1033340发现于日本兵库县丹波篠山市西古佐的大山下组(下篠山群)沉积物。大部分已知材料是由一群业余化石猎人于2010年9月丹波并木道中央公园建设期间发现。次年由该县兵库县立人与自然博物馆组织的后续考察发现一块属于同一个体的含化石石板。标本略微破碎,由中轴骨及附肢骨骼组成,包括两节带有人字骨的尾椎、两根肋骨、几根腹肋骨、大部分左臂(包括肱骨、桡骨、尺骨、腕骨、掌骨及大部分指骨和手爪骨)及部分腿骨(包括部分左股骨、胫骨及腓骨、右胫骨、两个距骨、几个部分跖骨及脚趾骨)。[1]
正式描述之前,化石材料曾在2012及2023年的会议摘要中提及。[2][3]其亦于2024年初在《Research Square》上发表的一份预印本中以篠山寐猎龙("Hypnovenator sasayamaensis")之名提及。[4]
2024年中旬,久保田胜弘(Katsuhiro Kubota)、小林快次(Yoshitsugu Kobayashi)及池田忠弘(Tadahiro Ikeda)根据此化石遗骸描述了伤齿龙科恐龙新属新种松大氏寐猎龙(Hypnovenator matsubaraetoheorum)。属名组合古希腊语词汇“hypnos”(意为“睡眠”)及拉丁语词汇“venator”(意为“猎人”),指正模标本所保存的类似寐龙、中国鸟脚龙等某些中国伤齿龙科的睡眠姿势。种名致敬寐猎龙正模标本发现者松原薰(Kaoru Matsubara)与大和隆治(Takaharu Ohe)。[1]寐猎龙代表日本第十二种有效命名的非鸟翼类恐龙。[5]
分类
久保田等人(2024年)将寐猎龙化石材料纳入塞里斯等人(2021年)的系统发育数据集,[6]后者本身是一项旨在检测手盗龙形态类所有主要类群的大型系统发育分析的衍生物。[7]久保田等人将其恢复为原始伤齿龙亚科成员,并作为较年轻的蒙古戈壁猎龙的姐妹群,使寐猎龙成为已知最古老的伤齿龙亚科。结果如以下分支图所示:[1]
伤齿龙科 Troodontidae |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
古生态学
![](http://images.weserv.nl/?url=//upload.wikimedia.org/wikipedia/commons/thumb/f/f3/Tambatitanis_amicitiae.jpg/220px-Tambatitanis_amicitiae.jpg)
寐猎龙发现于早白垩世末阿尔布阶早期至中期的大山下组(篠山群)。[1]这些层位主要由砂岩、泥岩及砾岩组成。沉积环境代表拥有半湿润至半干旱气候的河流系统。[10]恐龙牙齿在该层各地都很常见,包括属于其它兽脚类(驰龙科、镰刀龙下目及暴龙超科)及蜥脚类、甲龙类和禽龙类的牙齿。[11]已描述了几个蛋化石类群,包括姬蛋属、纤长蛋属、日本蛋属及棱柱形蛋属。[12]该地层其它少数根据躯干化石命名的爬行类包括怪蜥类的双刃齿蜥及巨龙形类蜥脚下目丹波巨龙。[13][14]地层中还发现了包括几块颅骨骨骼在内的未命名新角龙类化石。[15]
参考资料
参考资料
- ^ 1.0 1.1 1.2 1.3 Kubota, K.; Kobayashi, Y.; Ikeda, T. Early Cretaceous troodontine troodontid (Dinosauria: Theropoda) from the Ohyamashimo Formation of Japan reveals the early evolution of Troodontinae. Scientific Reports. 2024, 14. 16392. doi:10.1038/s41598-024-66815-2
.
- ^ Saegusa, Haruo; Ikeda, Tadahiro; Handa, Kumiko. Additional dinosaur materials from the Sasayama Group of Hyogo Prefecture, SW Japan (PDF). The Palaeontological Society of Japan. 2012 [2024-07-26]. (原始内容存档 (PDF)于2024-04-29).
- ^ Tanaka, Tomonori; Chiba, Kentaro; Ikeda, Tadahiro; Kubota, Katsuhiro. Examination on the newly identified elements and phylogenetic position of a theropod dinosaur from the Ohyamashimo Formation of the Sasayama Group in Tambasasayama City, Hyogo, Japan (PDF). The Palaeontological Society of Japan. 2023 [2024-07-26]. (原始内容存档 (PDF)于2024-04-19).
- ^ Kubota, Katsuhiro; Kobayashi, Yoshitsugu; Ikeda, Tadahiro. Early Cretaceous Troodontine Troodontid (Dinosauria: Theropoda) from the Ohyamashimo Formation of Japan Reveals the Early Evolution of Troodontinae. Research Square (preprint). 2024-06-07. doi:10.21203/rs.3.rs-4459611/v1.
- ^ 丹波篠山市の恐竜化石を 新属新種「ヒプノヴェナトル・マツバラエトオオエオルム」と命名 [Dinosaur fossil from Tamba-Sasayama City named new genus and species "Hypnovenator matsubaraetoheorum"] (新闻稿). Museum of Nature and Human Activities, Hyogo. 2024-07-25. (原始内容存档于2024-07-25).
- ^ Sellés, A. G.; Vila, B.; Brusatte, S. L.; Currie, P. J.; Galobart, A. A fast-growing basal troodontid (Dinosauria: Theropoda) from the latest Cretaceous of Europe. Scientific Reports. 2021, 11: 4855. PMC 7921422
. doi:10.1038/s41598-021-83745-5
.
- ^ Hartman, Scott; Mortimer, Mickey; Wahl, William R.; Lomax, Dean R.; Lippincott, Jessica; Lovelace, David M. A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight. PeerJ. 2019, 7: e7247. PMC 6626525
. PMID 31333906. doi:10.7717/peerj.7247
.
- ^ Norell, Mark A.; Clark, James M.; Demberelyin, Dashzeveg; Rhinchen, Barsbold; Chiappe, Luis M.; Davidson, Amy R.; McKenna, Malcolm C.; Altangerel, Perle; Novacek, Michael J. A Theropod Dinosaur Embryo and the Affinities of the Flaming Cliffs Dinosaur Eggs. Science. 1994-11-04, 266 (5186): 779–782 [2024-07-26]. ISSN 0036-8075. doi:10.1126/science.266.5186.779. (原始内容存档于2023-12-15) (英语).
- ^ Tsuihiji, Takanobu; Barsbold, Rinchen; Watabe, Mahito; Tsogtbaatar, Khishigjav; Suzuki, Shigeru; Hattori, Soki. New material of a troodontid theropod (Dinosauria: Saurischia) from the Lower Cretaceous of Mongolia. Historical Biology. 2015-10-01, 28 (1-2): 128–138 [2024-07-26]. ISSN 0891-2963. doi:10.1080/08912963.2015.1005086. (原始内容存档于2020-07-23) (英语).
- ^ Hayashi, Keiichi; Fujita, Saki; Koarai, Kazuto; Matsukawa, Masaki. Stratigraphy and paleoenvironment of the Cretaceous Sasayama Group in the Sasayama area, Hyogo Prefecture, western Japan. The Journal of the Geological Society of Japan. 2017-09-15, 123 (9): 747–764. ISSN 0016-7630. doi:10.5575/geosoc.2017.0016 (英语).
- ^ Kubota, Katsuhiro. 日本産の中生代恐竜化石目録 2022年版 [A list of Mesozoic dinosaur fossils from Japan in 2022] (PDF). Bulletin of the Gunma Museum of Natural History: 157–170. [2024-07-26]. (原始内容存档 (PDF)于2024-08-01).
- ^ Tanaka, Kohei; Zelenitsky, Darla K.; Therrien, François; Ikeda, Tadahiro; Kubota, Katsuhiro; Saegusa, Haruo; Tanaka, Tomonori; Ikuno, Kenji. Exceptionally small theropod eggs from the Lower Cretaceous Ohyamashimo Formation of Tamba, Hyogo Prefecture, Japan. Cretaceous Research. 2020, 114: Article 104519. Bibcode:2020CrRes.11404519T. S2CID 219449961. doi:10.1016/j.cretres.2020.104519.
- ^ Ikeda, T.; Ota, H.; Tanaka, T.; Ikuno, K.; Kubota, K.; Tanaka, K.; Saegusa, H. A fossil Monstersauria (Squamata: Anguimorpha) from the Lower Cretaceous Ohyamashimo Formation of the Sasayama Group in Tamba City, Hyogo Prefecture, Japan. Cretaceous Research. 2021, 130: Article 105063 [2024-07-26]. S2CID 239230916. doi:10.1016/j.cretres.2021.105063
. (原始内容存档于2024-04-15).
- ^ Saegusa, H.; Ikeda, T. A new titanosauriform sauropod (Dinosauria: Saurischia) from the Lower Cretaceous of Hyogo, Japan. Zootaxa. 2014, 3848 (1): 1–66. PMID 25112425. doi:10.11646/zootaxa.3848.1.1
.
- ^ Tanaka, Tomonori; Chiba, Kentaro; Ikeda, Tadahiro; Kubota, Katsuhiro. Phylogenetic position of a ceratopsian dinosaur from the Lower Cretaceous Ohyamashimo Formation (Albian) of the Sasayama Group in Tambasasayama City, Hyogo, Japan (PDF). The Palaeontological Society of Japan. 2023.
|