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Tentaculitids and their evolutionary significance in the Early Devonian Dashatian section, South China
Tentaculitids and their evolutionary significance in the Early Devonian Dashatian section, South China
- Source :
- Palaeobiodiversity and Palaeoenvironments. 99:7-28
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- Tentaculitoids have long been recognised as an enigmatic group of marine invertebrates that are widely distributed and highly diversified in the Silurian and Devonian strata. A tentaculitid assemblage is described herein from the Nagaoling Formation spanning the Lochkovian–Pragian boundary in Nanning, South China. Six new species are recognised: Tentaculitesbrevitenui n. sp., Lonchidium cylicus n. sp., Bicingulites nanningensis n. sp., Odessites aurisites n. sp., O. nahongensis n. sp. and Volynites nagaolingensis n. sp. are diagnosed. Two species Podolites sp. and Seretites sp. and one population Uniconus spp. are described in open nomenclature. All above tentaculitid genera can be detected in the Silurian strata from Sweden. The tentaculitids from South China allow transitional skeletal characters between benthic and planktonic tentaculitoids to be described, including conch size, conch wall thickness, septum number and the relationship between external and internal wall sculptures. The fossil assemblage, sedimentary rocks and taphonomic characters indicate that tentaculitids of Nagaoling Formation in South China were deposited in an outer shelf region with weak hydrodynamic condition.
- Subjects :
- 010506 paleontology
Global and Planetary Change
education.field_of_study
Taphonomy
Ecology
Population
Paleontology
Geology
Marine invertebrates
010502 geochemistry & geophysics
01 natural sciences
Devonian
Conch
Benthic zone
Group (stratigraphy)
Sedimentary rock
education
Ecology, Evolution, Behavior and Systematics
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 18671608 and 18671594
- Volume :
- 99
- Database :
- OpenAIRE
- Journal :
- Palaeobiodiversity and Palaeoenvironments
- Accession number :
- edsair.doi...........2f35c5caa1ec797b7674eab852ae856e
- Full Text :
- https://doi.org/10.1007/s12549-018-0367-7