Journal
PALAEONTOLOGY
Volume 63, Issue 5, Pages 775-789Publisher
WILEY
DOI: 10.1111/pala.12483
Keywords
Cnidarian; cubozoan; oral lip; Kuanchuanpu Formation; early Cambrian
Categories
Funding
- Scientific and Technological Innovation Project of Qingdao National Laboratory for Marine Science and Technology [QNLM201708, 2017ASKJ01, 2016ASKJ13]
- China-ASEAN Maritime Cooperation Fund Project [12120100500017001]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB26000000]
- Natural Science Foundation of China [41621003, 41772010, 41672009, 41720104002, 41911530236]
- Ministry of Science of China [D17013]
- 111 project of Ministry of Education of China [D17013]
- Most Special Fund from the State Key Laboratory of Continental Dynamics, Northwest University, China [BJ11060]
Ask authors/readers for more resources
The tetraradial or pentaradial fossil embryos and related hatched individuals from the early Cambrian Kuanchuanpu Formation are of great interest for understanding the early evolution of medusozoans. The phylogenetic and evolutionary significance of their external and internal characters (e.g. manubrium, tentacles, septa and claustra) is still controversial. Here we describe a new pentamerous medusozoan, Hanagyroia orientalis gen. et sp. nov., characterized by five well-developed perradial oral lips around a remarkably large manubrium, a conspicuous equatorial groove, and five short interradial pairs of extensile tentacles at the bell margin. Internally, five broad and stout interradial septa join horizontally to form the claustra. Hanagyroia orientalis lacks the frenula, apertural lappet and velarium seen in coeval microfossils and extant cubozoans. Although H. orientalis resembles extant coronate scyphozoans in its round medusa-like bell margin and equatorial groove, cladistic analysis suggests close affinity with cubozoans. Hanagyroia may represent an intermediate morphological type between scyphozoans and cubozoans. The well-developed oral lips and paired short strong tentacles of Hanagyroia suggest direct development.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available