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Article: Morphological diversification of ampullariid gastropods (Nsungwe Formation, Late Oligocene, Rukwa Rift Basin, Tanzania) is coincident with onset of East African rifting

Papers in Palaeontology - Volume 4 Part 3 - Cover Image
Publication: Palaeontology
Volume: 4
Part: 3
Publication Date: August 2018
Page(s): 327 348
Author(s): Y. Ranjeev Epa, Alycia L. Stigall, Eric M. Roberts, Haley D. O'Brien, and Nancy J. Stevens
DOI: 10.1002/spp2.1108
Addition Information

How to Cite

EPA, Y.R., STIGALL, A.L., ROBERTS, E.M., O'BRIEN, H.D., STEVENS, N.J. 2018. Morphological diversification of ampullariid gastropods (Nsungwe Formation, Late Oligocene, Rukwa Rift Basin, Tanzania) is coincident with onset of East African rifting. Papers in Palaeontology, 4, 3, 327-348. DOI: /doi/10.1002/spp2.1108

Author Information

  • Y. Ranjeev Epa - Department of Geological Sciences Ohio University 316 Clippinger Laboratories Athens OH 45701 USA
  • Alycia L. Stigall - Department of Geological Sciences Ohio University 316 Clippinger Laboratories Athens OH 45701 USA
  • Alycia L. Stigall - Center for Ecology & Evolutionary Studies Ohio University Athens OH 45701 USA
  • Eric M. Roberts - Geosciences, College of Science & Engineering James Cook University Townsville Qld Austraila
  • Haley D. O'Brien - Department of Anatomy & Cell Biology Oklahoma State University Center for Health Sciences 1111 W 17th St Tulsa OK 74107 USA
  • Nancy J. Stevens - Center for Ecology & Evolutionary Studies Ohio University Athens OH 45701 USA
  • Nancy J. Stevens - Department of Biomedical Sciences Ohio University Heritage College of Osteopathic Medicine Athens OH 45701 USA

Publication History

  • Issue published online: 03 August 2018
  • Manuscript Accepted: 14 December 2017
  • Manuscript Received: 29 September 2017

Funded By

Paleontological Society Student Research Award
Ohio University Graduate Alumni Research Grant
National Geographic Society (CRE)
LSB Leakey Foundation
Ohio University Research Council
National Science Foundation. Grant Numbers: BCS 1127164, BCS‐ 1313679, BCS‐ 1638796, EAR 0617561, EAR/IF 0933619, EAR‐ 1349825

Online Version Hosted By

Wiley Online Library
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Abstract

A new freshwater gastropod fauna is described from the late Oligocene Nsungwe Formation of the Rukwa Rift Basin, Tanzania. Six new species of ampullariids are established including five species of Lanistes (L. microovum, L. nsungwensis, L. rukwaensis, L. songwellipticus and L. songweovum) and one species of Carnevalea (C. santiapillaii). These taxa occupy a morphospace region comparable to nearly half of extant Lanistes, a common and widespread genus in Africa and Madagascar. Palaeoecological evidence indicates that Nsungwe ampullariids inhabited fluvial, pond and paludal environments. Among these species are the oldest high‐spired and fluvially adapated Lanistes taxa. We suggest that Nsungwe Lanistes rapidly diversified in concert with habitat heterogeneity associated with the initiation of rifting along the western branch of the East African Rift System (EARS). Taxonomy, evolution and the biogeographical affinities of Nsungwe Formation freshwater gastropods contributes significantly to expanding the undersampled Palaeogene invertebrate fossil record of continental Africa.

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