Amphi-Atlantic distribution of the subterranean amphipod family Metacrangonyctidae (Crustacea, Gammaridea)
Members of the strictly stygobiont, continental subterranean amphipod family Metacrangonyctidae are reported for the first time outside the Old World. Two new species of Metacrangonyx are described from two widely separated localities in the Dominican Republic (Hispaniola), one facing the Caribbean...
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ftcsic:oai:digital.csic.es:10261/54292 2024-02-11T10:06:30+01:00 Amphi-Atlantic distribution of the subterranean amphipod family Metacrangonyctidae (Crustacea, Gammaridea) Jaume, Damià Christenson, K. 2001 http://hdl.handle.net/10261/54292 en eng SPB Academic Publishing issn: 1383-4517 Contributions to Zoology 70(2): 99- 125 (2001) http://hdl.handle.net/10261/54292 none artículo http://purl.org/coar/resource_type/c_6501 2001 ftcsic 2024-01-16T09:39:50Z Members of the strictly stygobiont, continental subterranean amphipod family Metacrangonyctidae are reported for the first time outside the Old World. Two new species of Metacrangonyx are described from two widely separated localities in the Dominican Republic (Hispaniola), one facing the Caribbean and the other the Atlantic ocean. The discovery of metacrangonyctids in the western Atlantic suggests that they are an ancient subterranean lineage tied to the shores of the Tethys belt, and thus weakens previous biogeographic arguments raised to favour their separate and independent family status with respect to the Hadziidae. The discovery in the Mediterranean of marine populations of metacrangonyctids is reported as well, and both findings are used to test the reliability of the scenario currently held for the origin and evolution of this peculiar group of stygobiont amphipods. It is concluded that Metacrangonyx is a thalassoid lineage already present in the shores of the western Tethys before the complete aperture of the central North Atlantic (circa 110 Myr BP), and with marine populations persisting at both shores of this ocean until some time in the Quaternary, in case they have not yet disappeared. Evidence derived from Hispaniolan and Balearic Metacrangonyx does not support the correspondence between species-groups and the time at which precise waves of colonization of continental ground waters took place (after Turonian and Senonian marine regressions, respectively) as is assumed to occur for Old World taxa. Peer Reviewed Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
Members of the strictly stygobiont, continental subterranean amphipod family Metacrangonyctidae are reported for the first time outside the Old World. Two new species of Metacrangonyx are described from two widely separated localities in the Dominican Republic (Hispaniola), one facing the Caribbean and the other the Atlantic ocean. The discovery of metacrangonyctids in the western Atlantic suggests that they are an ancient subterranean lineage tied to the shores of the Tethys belt, and thus weakens previous biogeographic arguments raised to favour their separate and independent family status with respect to the Hadziidae. The discovery in the Mediterranean of marine populations of metacrangonyctids is reported as well, and both findings are used to test the reliability of the scenario currently held for the origin and evolution of this peculiar group of stygobiont amphipods. It is concluded that Metacrangonyx is a thalassoid lineage already present in the shores of the western Tethys before the complete aperture of the central North Atlantic (circa 110 Myr BP), and with marine populations persisting at both shores of this ocean until some time in the Quaternary, in case they have not yet disappeared. Evidence derived from Hispaniolan and Balearic Metacrangonyx does not support the correspondence between species-groups and the time at which precise waves of colonization of continental ground waters took place (after Turonian and Senonian marine regressions, respectively) as is assumed to occur for Old World taxa. Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Jaume, Damià Christenson, K. |
spellingShingle |
Jaume, Damià Christenson, K. Amphi-Atlantic distribution of the subterranean amphipod family Metacrangonyctidae (Crustacea, Gammaridea) |
author_facet |
Jaume, Damià Christenson, K. |
author_sort |
Jaume, Damià |
title |
Amphi-Atlantic distribution of the subterranean amphipod family Metacrangonyctidae (Crustacea, Gammaridea) |
title_short |
Amphi-Atlantic distribution of the subterranean amphipod family Metacrangonyctidae (Crustacea, Gammaridea) |
title_full |
Amphi-Atlantic distribution of the subterranean amphipod family Metacrangonyctidae (Crustacea, Gammaridea) |
title_fullStr |
Amphi-Atlantic distribution of the subterranean amphipod family Metacrangonyctidae (Crustacea, Gammaridea) |
title_full_unstemmed |
Amphi-Atlantic distribution of the subterranean amphipod family Metacrangonyctidae (Crustacea, Gammaridea) |
title_sort |
amphi-atlantic distribution of the subterranean amphipod family metacrangonyctidae (crustacea, gammaridea) |
publisher |
SPB Academic Publishing |
publishDate |
2001 |
url |
http://hdl.handle.net/10261/54292 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
issn: 1383-4517 Contributions to Zoology 70(2): 99- 125 (2001) http://hdl.handle.net/10261/54292 |
op_rights |
none |
_version_ |
1790604274957287424 |