PalZ

, Volume 91, Issue 2, pp 171–184

New species of Thylacocephala (Arthropoda) from the Spathian (Lower Triassic) of Chaohu, Anhui Province of China

  • Cheng Ji
  • Andrea Tintori
  • Dayong Jiang
  • Ryosuke Motani
Research Paper

Abstract

We describe a new species of Thylacocephala, Ankitokazocaris chaohuensis sp. nov., from the Upper Spathian (Early Triassic) of Chaohu, Anhui Province, China. It is diagnosed by its unique outline of the carapace, small size, and the narrow and asymmetrical anterior notch. Fine preservation reveals at least 14 posterior appendages, traces of gills and raptorial appendages, and remains of trunk segments and muscles in Ankitokazocaris for the first time. This is the first report of Thylacocephala from the Early Triassic of China, confirming the wide distribution of this group in the Tethys. The new species is closer to the type species of Ankitokazocaris, which is stratigraphically somewhat older, than to a recently described almost coeval species from Japan.

Keywords

Thylacocephala New species Predation Lower Triassic China 

Kurzfassung

Wir beschreiben eine neue Art der Thylacocephala, Ankitokazocaris chaohuensis sp. nov., aus dem Ober-Spathium (frühe Trias) von Chaohu (Provinz Anhui) in China. Diese zeichnet sich durch einen einzigartigen Carapax-Umriss, einer kleinen Größe sowie durch eine enge und asymmetrische vordere Einkerbung aus. Die ausgezeichnete Erhaltung offenbart bei Ankitokazocaris erstmals mindestens 14 posteriore Anhänge, Spuren von Kiemen, zum Greifen geeignete Anhänge sowie Reste von Rumpfsegmenten und Muskeln. Desweiteren handelt es sich bei den vorliegenden Funden um den ersten Nachweis von Thylacocephala aus der frühen Trias Chinas, der somit die weite Verbreitung dieser Gruppe in der Tethys bestätigt. Die neue Art steht der Typusart von Ankitokazocaris nahe, die stratigraphisch ein wenig älter ist, als die kürzlich beschriebene nahezu gleichaltrige Art aus Japan.

Schlüsselwörter

Thylacocephala Neue Art Prädation Unter-Trias China 

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Copyright information

© Paläontologische Gesellschaft 2017

Authors and Affiliations

  • Cheng Ji
    • 1
  • Andrea Tintori
    • 2
  • Dayong Jiang
    • 3
  • Ryosuke Motani
    • 4
  1. 1.CAS Key Laboratory of Economic Stratigraphy and PalaeogeographyNanjing Institute of Geology and PalaeontologyNanjingPeople’s Republic of China
  2. 2.Dipartimento di Scienze della TerraUniversità degli Studi di MilanoMilanItaly
  3. 3.Laboratory of Orogenic Belt and Crustal Evolution, Ministry of Education, and Department of Geology and Geological MuseumPeking UniversityBeijingPeople’s Republic of China
  4. 4.Department of Earth and Planetary SciencesUniversity of CaliforniaDavisUSA

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