If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Giant Viviparidae (Gastropoda: Architaenioglossa) from the Early Oligocene of the Nanning Basin (Guangxi, SE China)

$39.00 plus tax (Refund Policy)

Buy Article:

Abstract:

The rich freshwater mollusc fauna from the Lower Oligocene Gongkang Formation (Yongning Group) of the Nanning Basin (Guangxi Province, SE China) has yielded shells of two species of giant viviparid gastropods, which are described as Margarya nanningensis n. sp. and Macromargarya aliena n. gen. n. sp. The genus Margarya Nevill, 1877 has so far been thought to be endemic to the Pleistocene to Recent freshwater lakes of Yunnan Province (SW China), and is first described from the Oligocene of Guangxi herein. With a maximum height of more than 100 mm, Macromargarya aliena is among the largest freshwater gastropods reported to date. Moreover, M. aliena displays a strange ontogeny. An early, very low-trochospiral growth stage is followed by a rapid shift of the coiling axis and whorl proportions, leading to regular viviparid morphology in adulthood.

Keywords: BODY SIZE; EAST ASIA; FRESHWATER; MARGARYA; TAXONOMY

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0077-7749/2012/0298

Publication date: January 1, 2013

More about this publication?
  • Neues Jahrbuch für Geologie und Paläontologie continuously publishes current original contributions from all fields of geology, ever since its foundation in 1807. All published contributions are in the English language.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more