Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

Journal of Paleontology

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by HUA-ZHANG, P. Articles by XIANG-SHUI, Z. Search for Related Content GeoRef GeoRef Citation

JIANGXISPIRA, A NEW GASTROPOD GENUS FROM THE EARLY TRIASSIC OF CHINA WITH REMARKS ON THE PHYLOGENY OF THE HETEROSTROPHA AT THE PERMIAN/TRIASSIC BOUNDARY

¹ Nanjing Institute of Geology and Palaeontology, Academia Sinica, Nanjing, People's Republic of China 210008
² Department of Paleobiology, MRC-121, National Museum of Natural History, Washington, D. C. 20560
³ Paläontologisches Institut, Universität Erlangen, Loewenichstr. 28, D-91054 Erlangen, Germany
⁴ Department of Environment and Resource Science, Jiangxi Normal University, Nanchang, Republic of China 330027

New heterostrophic gastropods are reported from the lowermost part of the Dayie Formation (Early Triassic, Leping, Jiangxi province, China). A new genus Jiangxispira (Streptacididae) is described. Jiangxispira yangouensis new genus and new species has an almost discoidal, heterostrophic protoconch that is typical of the largely Paleozoic Streptacididae, yet the teleoconch resembles that of certain Mesozoic opisthobranchs belonging to the Superfamily Cylindrobullinoidea. This character combination in Jiangxispira may indicate a phylogenetic link between the Paleozoic Streptacididae (Allogastropoda) and the Mesozoic Cylindrobullinoidea (Opisthobranchia). Small opisthobranchs form an important component of Early Triassic gastropod faunas. The opisthobranchs seemingly benefited from selective processes operating during the Permo-Triassic mass extinction and the reorganization of gastropod faunas during the subsequent recovery period.