From: dinosaur-l-request@usc.edu <dinosaur-l-request@usc.edu> on behalf of Ben Creisler <bcreisler@gmail.com>
Sent: May 31, 2017 1:24:53 AM
To: dinosaur-l@usc.edu
Subject: [dinosaur] Liaoningvenator, new troodontid theropod from Early Cretaceous Yixian Formation, China (free pdf)
Ben Creisler
A new paper with free pdf:
Shen Caizhi, Zhao Bo, Gao Chunling, Lü Junchang & Martin Kundrát (2017)A New Troodontid Dinosaur (Liaoningvenator curriei gen. et sp. nov.) from the Early Cretaceous Yixian Formation in Western Liaoning Province.Acta Geoscientica Sinica,38(3):359-371doi: 10.3975/cagsb.2017.03.06
pdf download link:
A new troodontid, Liaoningvenator curriei gen. et sp. nov., is described based on a complete skeleton from the Early Cretaceous Yixian Formation of Beipiao City, Liaoning Province. It bears the following characteristics of Troodontidae: numerous and more closely appressed maxillary and dentary teeth; the teeth markedly constricted between the roots and crowns; the nutrient foramina in groove on the external surface of dentary; distal caudal vertebrae having a sulcus on the dorsal midline rather than a neural spine. Unlike other troodontids, Liaoningvenator exhibits a sub-triangular ischial boot in lateral view and slender ischial obturator process; transition point in caudal vertebrae starts from the seventh caudal vertebra. A phylogenetic analysis recovers Liaoningvenator and Eosinopteryx as sister taxa that belong to the same clade. These two taxa share the following three characteristics: (1) anterior maxillary and dentary teeth lack serrations along the anterior carina; (2) shafts of cervical ribs are longer than vertebral centra with which they articulate; and (3) anterior margin of ilium is straight. The histological study indicates that Liaoningvenator was attaining skeletal maturity and at least four years old when it perished. Liaoningvenator represents the fifth troodontid taxon from the Lower Cretaceous equivalent strata of western Liaoning. It provides much new anatomical information on basal troodontid dinosaurs in this region. It also enhances the diversity of the troodontids in Early Cretaceous of China currently known.
=
[NOTE:If the pdf link above does not work, the article pdf download is the first set of four Chinese characters on the left end of the sets of characters near the bottom of the page under the citation.
[chákàn quánwén]
查看全文
(DONT click the third item on the line containing the letters PDF--it's to download to pdf reader, not the article!)]
Thomas R. Holtz, Jr.
Email: tholtz@umd.edu Phone: 301-405-4084
Principal Lecturer, Vertebrate Paleontology
Office: Geology 4106, 8000 Regents Dr., College Park MD 20742
Dept. of Geology, University of Maryland
http://www.geol.umd.edu/~tholtz/
Phone: 301-405-6965
Fax: 301-314-9661
Faculty Director, Science & Global Change Program, College Park Scholars
Office: Centreville 1216, 4243 Valley Dr., College Park MD 20742
http://www.geol.umd.edu/sgc
Fax: 301-314-9843
Mailing Address: Thomas R. Holtz, Jr.
Department of Geology
Building 237, Room 1117
8000 Regents Drive
University of Maryland
College Park, MD 20742-4211 USA