Limits...
Biogeography and taxonomy of extinct and endangered monk seals illuminated by ancient DNA and skull morphology.

Scheel DM, Slater GJ, Kolokotronis SO, Potter CW, Rotstein DS, Tsangaras K, Greenwood AD, Helgen KM - Zookeys (2014)

Bottom Line: Molecular, morphological and temporal divergence between the Mediterranean and "New World monk seals" (Hawaiian and Caribbean) is profound, equivalent to or greater than between sister genera of phocids.As a result, we classify the Caribbean and Hawaiian monk seals together in a newly erected genus, Neomonachus.The two genera of extant monk seals (Monachus and Neomonachus) represent old evolutionary lineages each represented by a single critically endangered species, both warranting continuing and concerted conservation attention and investment if they are to avoid the fate of their Caribbean relative.

View Article: PubMed Central - HTML - PubMed

Affiliation: Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315 Berlin, Germany.

ABSTRACT
Extinctions and declines of large marine vertebrates have major ecological impacts and are of critical concern in marine environments. The Caribbean monk seal, Monachus tropicalis, last definitively reported in 1952, was one of the few marine mammal species to become extinct in historical times. Despite its importance for understanding the evolutionary biogeography of southern phocids, the relationships of M. tropicalis to the two living species of critically endangered monk seals have not been resolved. In this study we present the first molecular data for M. tropicalis, derived from museum skins. Phylogenetic analysis of cytochrome b sequences indicates that M. tropicalis was more closely related to the Hawaiian rather than the Mediterranean monk seal. Divergence time estimation implicates the formation of the Panamanian Isthmus in the speciation of Caribbean and Hawaiian monk seals. Molecular, morphological and temporal divergence between the Mediterranean and "New World monk seals" (Hawaiian and Caribbean) is profound, equivalent to or greater than between sister genera of phocids. As a result, we classify the Caribbean and Hawaiian monk seals together in a newly erected genus, Neomonachus. The two genera of extant monk seals (Monachus and Neomonachus) represent old evolutionary lineages each represented by a single critically endangered species, both warranting continuing and concerted conservation attention and investment if they are to avoid the fate of their Caribbean relative.

No MeSH data available.


Related in: MedlinePlus

Genetic distances between currently recognized taxonomic units within Phocidae derived from logdet distances for cytb. Distances within: aPhocabPusacPhoca versus HalichoerusdPusa versus HalichoerusePhoca versus PusafHistriophoca versus PagophilusgPhocinihPhocinaeiMonachusjMiroungakLobodontini, and lMonachini.
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Figure 4: Genetic distances between currently recognized taxonomic units within Phocidae derived from logdet distances for cytb. Distances within: aPhocabPusacPhoca versus HalichoerusdPusa versus HalichoerusePhoca versus PusafHistriophoca versus PagophilusgPhocinihPhocinaeiMonachusjMiroungakLobodontini, and lMonachini.

Mentions: Pairwise genetic distances incorporating the Caribbean monk seal (Figure 4) confirm the findings of Fulton and Strobeck (2010b). Genetic distances between currently recognized generic lineages within the subtribe Phocina (Phoca, Pusa, and Halichoerus) are more similar to species-level, rather than generic-level, distinctions in other phocid lineages (perhaps an indication that this lineage is generically ‘oversplit’). Within Monachus, our analyses reveal that sequence divergence between all three species is of a similar magnitude and equivalent to tribal-level divergence in other phocine and monachine taxa.


Biogeography and taxonomy of extinct and endangered monk seals illuminated by ancient DNA and skull morphology.

Scheel DM, Slater GJ, Kolokotronis SO, Potter CW, Rotstein DS, Tsangaras K, Greenwood AD, Helgen KM - Zookeys (2014)

Genetic distances between currently recognized taxonomic units within Phocidae derived from logdet distances for cytb. Distances within: aPhocabPusacPhoca versus HalichoerusdPusa versus HalichoerusePhoca versus PusafHistriophoca versus PagophilusgPhocinihPhocinaeiMonachusjMiroungakLobodontini, and lMonachini.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4042687&req=5

Figure 4: Genetic distances between currently recognized taxonomic units within Phocidae derived from logdet distances for cytb. Distances within: aPhocabPusacPhoca versus HalichoerusdPusa versus HalichoerusePhoca versus PusafHistriophoca versus PagophilusgPhocinihPhocinaeiMonachusjMiroungakLobodontini, and lMonachini.
Mentions: Pairwise genetic distances incorporating the Caribbean monk seal (Figure 4) confirm the findings of Fulton and Strobeck (2010b). Genetic distances between currently recognized generic lineages within the subtribe Phocina (Phoca, Pusa, and Halichoerus) are more similar to species-level, rather than generic-level, distinctions in other phocid lineages (perhaps an indication that this lineage is generically ‘oversplit’). Within Monachus, our analyses reveal that sequence divergence between all three species is of a similar magnitude and equivalent to tribal-level divergence in other phocine and monachine taxa.

Bottom Line: Molecular, morphological and temporal divergence between the Mediterranean and "New World monk seals" (Hawaiian and Caribbean) is profound, equivalent to or greater than between sister genera of phocids.As a result, we classify the Caribbean and Hawaiian monk seals together in a newly erected genus, Neomonachus.The two genera of extant monk seals (Monachus and Neomonachus) represent old evolutionary lineages each represented by a single critically endangered species, both warranting continuing and concerted conservation attention and investment if they are to avoid the fate of their Caribbean relative.

View Article: PubMed Central - HTML - PubMed

Affiliation: Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315 Berlin, Germany.

ABSTRACT
Extinctions and declines of large marine vertebrates have major ecological impacts and are of critical concern in marine environments. The Caribbean monk seal, Monachus tropicalis, last definitively reported in 1952, was one of the few marine mammal species to become extinct in historical times. Despite its importance for understanding the evolutionary biogeography of southern phocids, the relationships of M. tropicalis to the two living species of critically endangered monk seals have not been resolved. In this study we present the first molecular data for M. tropicalis, derived from museum skins. Phylogenetic analysis of cytochrome b sequences indicates that M. tropicalis was more closely related to the Hawaiian rather than the Mediterranean monk seal. Divergence time estimation implicates the formation of the Panamanian Isthmus in the speciation of Caribbean and Hawaiian monk seals. Molecular, morphological and temporal divergence between the Mediterranean and "New World monk seals" (Hawaiian and Caribbean) is profound, equivalent to or greater than between sister genera of phocids. As a result, we classify the Caribbean and Hawaiian monk seals together in a newly erected genus, Neomonachus. The two genera of extant monk seals (Monachus and Neomonachus) represent old evolutionary lineages each represented by a single critically endangered species, both warranting continuing and concerted conservation attention and investment if they are to avoid the fate of their Caribbean relative.

No MeSH data available.


Related in: MedlinePlus