Publication Date:
2022-05-26
Description:
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Gale, A. S., Little, C. T. S., Johnson, J. E., & Giosan, L. A new neolepadid cirripede from a Pleistocene cold seep, Krishna-Godavari Basin, offshore India. Acta Palaeontologica Polonica, 65(2), (2020): 351-362, doi:10.4202/app.00705.2019.
Description:
alves of a thoracican cirripede belonging to a new species of the Neolepadidae, Ashinkailepas indica Gale sp. nov. are described from a Late Pleistocene cold seep (52.6 ka), cored in the Krishna-Godavari Basin, offshore from the eastern coast of India. This constitutes the first fossil record of the genus, and its first occurrence in the Indian Ocean. Other fossil records of the Neolepadidae (here elevated to full family status) are discussed, and it is concluded that only Stipilepas molerensis from the Eocene of Denmark, is correctly referred to the family. Cladistic analysis of the Neolepadidae supports a basal position for Ashinkailepas, as deduced independently from molecular studies, and the Lower Cretaceous brachylepadid genus Pedupycnolepas is identified as sister taxon to Neolepadidae. Neolepadids are not Mesozoic relics as claimed, preserved in association with the highly specialised environments of cold seeps and hydrothermal vents, but are rather an early Cenozoic offshoot from the clade which also gave rise to the sessile cirripedes.
Description:
We would like to thank Claire Mellish (NHMUK) for assistance with registration of the material in the NHMUK. We would like to thank John Buckeridge (RMIT, Melbourne, Australia) and an anonymous reviewer for their most useful comments. We greatly appreciate the efforts of the NGHP-01 shipboard scientific party for the collection and initial interpretation of these cores. The authors wish to thank those that contributed to the success of the National Gas Hydrate Program Expedition 01 (NGHP-01). NGHP-01 was planned and managed through collaboration between the Directorate General of Hydrocarbons (DGH) under
the Ministry of Petroleum and Natural Gas (India), the US Geological Survey (USGS), and the Consortium for Scientific Methane Hydrate Investigations (CSMHI) led by Overseas Drilling Limited (ODL) and FUGRO McClelland Marine Geosciences (FUGRO). The platform for the drilling operation was the research drill ship JOIDES Resolution, operated by ODL. Much of the drilling/coring equipment used was provided by the Integrated Ocean Drilling Program (IODP) through a loan agreement with the US National Science Foundation. Wireline pressure coring systems and supporting laboratories were provided by IODP/Texas A&M University (TAMU), FUGRO, USGS, US Department of Energy (USDOE) and HYACINTH/GeoTek. Downhole logging operational and technical support was provided by Lamont-Doherty Earth Observatory (LDEO) of Columbia University. The financial support
for the NGHP-01, from the Oil Industry Development Board, Oil and Natural Gas Corporation Ltd., GAIL (India) Ltd. and Oil India Ltd. is gratefully acknowledged. We also acknowledge the support extended by all the participating organizations of the NGHP: MoP&NG, DGH, ONGC, GAIL, OIL, NIO, NIOT, and RIL.
Keywords:
Cirripedia
;
Thoracica
;
Neolepadidae
;
cold seep
;
Pleistocene
;
Indian Ocean
Repository Name:
Woods Hole Open Access Server
Type:
Article
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