True's beaked whale (Mesoplodon mirus) in Macaronesia (original) (raw)
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Latin American Journal of …, 2005
A male True's Beaked Whale (Mesoplodon mirus) stranded alive on 04 May 2004, on the northern coast of São Paulo State, southeastern Brazil, and died twenty minutes later. To date, this species has only been recorded from the North Atlantic, southeast Africa and southern Australia. The complete skeleton was saved and the heart, stomach, testis, epizoites, samples of tissues, and blood were collected. This is the first record of M. mirus for the Western Tropical Atlantic (south of the Equator) and for South America. The record provides important information on this poorly known species. Resumen: Un varamiento de un macho vivo de Zifio de True (Mesoplodon mirus) ha ocurrido en la costa norte de la Provincia de São Paulo, en el 4 de Mayo de 2004. El animal se ha muerto veinte minutos después de varado. Esta especie ha sido registrada solamente en el Atlántico Norte, sureste de África, y sur de Australia. El esqueleto completo ha sido colectado así como el corazón, estómago, testículos, epizoicos, muestras de tejidos y sangre. Este registro es el primer de M. mirus para el Atlántico Sur-Occidental y para la América del Sur, aportándonos importantes informaciones para esta especie poco conocida.
Latin American Journal of Aquatic Mammals
A male True's Beaked Whale (Mesoplodon mirus) stranded alive on 04 May 2004, on the northern coast of São Paulo State, southeastern Brazil, and died twenty minutes later. To date, this species has only been recorded from the North Atlantic, southeast Africa and southern Australia. The complete skeleton was saved and the heart, stomach, testis, epizoites, samples of tissues, and blood were collected. This is the first record of M. mirus for the Western Tropical Atlantic (south of the Equator) and for South America. The record provides important information on this poorly known species. Resumen: Un varamiento de un macho vivo de Zifio de True (Mesoplodon mirus) ha ocurrido en la costa norte de la Provincia de São Paulo, en el 4 de Mayo de 2004. El animal se ha muerto veinte minutos después de varado. Esta especie ha sido registrada solamente en el Atlántico Norte, sureste de África, y sur de Australia. El esqueleto completo ha sido colectado así como el corazón, estómago, testículos, epizoicos, muestras de tejidos y sangre. Este registro es el primer de M. mirus para el Atlántico Sur-Occidental y para la América del Sur, aportándonos importantes informaciones para esta especie poco conocida.
A Comprehensive and Validated Molecular Taxonomy of Beaked Whales, Family Ziphiidae
Journal of Heredity, 2004
DNA sequences from orthologous loci can provide universal characters for taxonomic identification. Molecular taxonomy is of particular value for groups in which distinctive morphological features are difficult to observe or compare. To assist in species identification for the little known family Ziphiidae (beaked whales), we compiled a reference database of mitochondrial DNA (mtDNA) control region (437 bp) and cytochrome b (384 bp) sequences for all 21 described species in this group. This mtDNA database is complemented by a nuclear database of actin intron sequences (925 bp) for 17 of the 21 species. All reference sequences were derived from specimens validated by diagnostic skeletal material or other documentation, and included four holotypes. Phylogenetic analyses of mtDNA sequences confirmed the genetic distinctiveness of all beaked whale species currently recognized. Both mitochondrial loci were well suited for species identification, with reference sequences for all known ziphiids forming robust species-specific clades in phylogenetic reconstructions. The majority of species were also distinguished by nuclear alleles. Phylogenetic comparison of sequence data from ''test'' specimens to these reference databases resulted in three major taxonomic discoveries involving animals previously misclassified from morphology. Based on our experience with this family and the order Cetacea as a whole, we suggest that a molecular taxonomy should consider the following components: comprehensiveness, validation, locus sensitivity, genetic distinctiveness and exclusivity, concordance, and universal accessibility and curation.
Marine Mammal Science, 2002
Mesoplodon perrini, a new species of beaked whale is described on the basis of five animals stranded on the coast of California (between 32Њ55ЈN, 117Њ15ЈW and 36Њ37ЈN, 121Њ55ЈW) from May 1975 to September 1997. Four of these animals were initially identified as Hector's beaked whales M. hectori based on cranial morphology (Mead 1981). A fifth specimen was initially identified as a neonate Cuvier's beaked whale Ziphius cavirostris based on external features. These specimens were first recognized as representatives of an undescribed species through phylogenetic analysis of mitochondrial (mt) DNA control region and cytochrome b sequence data. Although similar morphologically, the genetic data do not support a close evolutionary relationship between M. perrini and M. hectori. Instead, these data suggest a possible sister-
Speciation in the deep: genomics and morphology reveal a new species of beaked whale Mesoplodon eueu
Proceedings of the Royal Society B: Biological Sciences
The deep sea has been described as the last major ecological frontier, as much of its biodiversity is yet to be discovered and described. Beaked whales (ziphiids) are among the most visible inhabitants of the deep sea, due to their large size and worldwide distribution, and their taxonomic diversity and much about their natural history remain poorly understood. We combine genomic and morphometric analyses to reveal a new Southern Hemisphere ziphiid species, Ramari's beaked whale, Mesoplodon eueu , whose name is linked to the Indigenous peoples of the lands from which the species holotype and paratypes were recovered. Mitogenome and ddRAD-derived phylogenies demonstrate reciprocally monophyletic divergence between M. eueu and True's beaked whale ( M. mirus ) from the North Atlantic, with which it was previously subsumed. Morphometric analyses of skulls also distinguish the two species. A time-calibrated mitogenome phylogeny and analysis of two nuclear genomes indicate diverge...
Review of Gray's beaked whale (Mesoplodon grayi) in the South East Pacific
Therya, 2022
Information collected from a complete female juvenile individual of Gray's beaked whale (Mesoplodon grayi) stranded on the Guanaqueros coast, Coquimbo Region in Chile (30°S) is provided. Difficulties to differentiate specimens of Gray's beaked whale and Hector's beaked whale (M. hectori) are discussed based on the use of diagnostic phenotypic characters, such as differences in color patterns and position of teeth on the lower jaw. The identification of the studied specimen as Gray's beaked whale was supported by a detailed review of cranial characters and molecular analyses. Finally, we provide an updated list containing all known Chilean records for this species. Se proporciona información del registro más completo de Mesoplodon grayi (Ziphiidae) que se conoce para Chile y que corresponde a una hembra juvenil varada en la costa de Guanaqueros, Región de Coquimbo (30°S). Se discuten los problemas de determinación de Mesoplodon grayi con respecto a M. hectori en base a la utilización de caracteres fenotipicos generales como patrones de coloración. La asignación a Mesoplodon grayi se apoyó en la revisión detallada de caracteres craneales y un análisis molecular. Además, se presenta un listado actualizado con todos los registros conocidos para esta especie en las costas de Chile.
First stranding record of a True’s beaked whale, Mesoplodon mirus in Mozambique
True's Beaked Whales are found in cool temperate, deep oceanic waters. This species has a uniquely disjunct distribution, occurring in the northern North Atlantic Ocean, as well as the southern regions of the Atlantic, Indian and Pacific Oceans. Sightings of the species are very rare and it is mainly known from strandings. In the southern hemisphere a stranding hot spot is South Africa. Here we report two records from Mozambique, including the first stranding record for this country.