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On the origin and evolution of a new anchialine stygobitic Microceratina species (Crustacea, Ostracoda) from Christmas Island (Indian Ocean)

Tadeusz Namiotko, Karel Wouters, Dan L. Danielopol and William F. Humphreys
On the origin and evolution of a new anchialine stygobitic Microceratina species (Crustacea, Ostracoda) from Christmas Island (Indian Ocean)
Journal of Micropalaeontology (May 2004) 23, Part 1: 49-59

Abstract

Marine species of the ostracod genus Microceratina Swanson (Cytheruridae, Eucytherurinae) were until now known only from their hard parts, the valves and carapaces, as no living animals have been described. Here we report the first living population, from a tropical anchialine cave. The description of the limbs and hard parts of this new taxon, M. martensi sp. nov., enhances our understanding of the origin and evolution of the cave-dwelling Microceratina - the new species and M. pseudoamfibola (Barbeito-Gonzalez) from an anchialine cave in Southern Italy - and clarifies their affinities with other Eucytherurinae species. Microceratina is known from both Recent and fossil species (Quaternary, Tertiary and Late Cretaceous) from shelf and deep-sea habitats and/or sedimentary facies, located in the Pacific Ocean (along the Australian and New Zealand coasts), the Mediterranean (Greece and Italy), the North Atlantic (British Isles) and the Baltic Sea (Ruegen Island). This suggests that the Microceratina group spread through the expanding Tethys Ocean. The morphological traits of the two cave-dwelling species reflect their ecological conditions. Cave-dwelling Microceratina species appear to have originated from epigean shallow water species predisposed to colonize subterranean habitats.


ISSN: 0262-821X
EISSN: 2041-4978
Serial Title: Journal of Micropalaeontology
Serial Volume: 23, Part 1
Title: On the origin and evolution of a new anchialine stygobitic Microceratina species (Crustacea, Ostracoda) from Christmas Island (Indian Ocean)
Affiliation: University of Gdansk, Department of Genetics and Cytology, Gdansk, Poland
Pages: 49-59
Published: 200405
Text Language: English
Publisher: British Micropalaeontological Society, London, United Kingdom
References: 65
Accession Number: 2008-008867
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch maps
S10°25'00" - S10°25'00", E105°42'00" - E105°42'00"
Secondary Affiliation: Royal Belgian Institute of Natural Sciences, BEL, BelgiumAustrian Academy of Sciences, AUT, AustriaWestern Australian Museum, AUS, Australia
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200804
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