Marine centres of origin as evolutionary engines

Briggs, John C.

doi:10.1046/j.1365-2699.2003.00810.x

Cited by 247 publications

(208 citation statements)

References 62 publications

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“…Moreover, there is evidence from mollusc fossil discoveries (Crame 1999) and phylogenetic variations in fishes (Bargelloni et al 2000) of the dispersion and evolution of the Antarctic species being displaced outwards by gradations in diversity. These facts have caused Antarctica to be proposed as a marine centre of diversity (Briggs 2003). In this way, Antarctica will produce a regular pool of successful ancestral species capable of spreading to the nearest areas and becoming widely distributed outward in contrast to the derived species that will form the local populations (Briggs 2003).…”

Section: Taxonomic Remarksmentioning

confidence: 99%

“…These facts have caused Antarctica to be proposed as a marine centre of diversity (Briggs 2003). In this way, Antarctica will produce a regular pool of successful ancestral species capable of spreading to the nearest areas and becoming widely distributed outward in contrast to the derived species that will form the local populations (Briggs 2003). Strong similarities have been reported between South America and Antarctic regions for some invertebrate taxa (Rodriguez et al 2007, Griffiths et al 2009), but the direction of the linkage is uncertain.…”

Section: Taxonomic Remarksmentioning

confidence: 99%

“…Strong similarities have been reported between South America and Antarctic regions for some invertebrate taxa (Rodriguez et al 2007, Griffiths et al 2009), but the direction of the linkage is uncertain. Antarctica has also been proposed as an immigrant receptor for opportunistic colonists, being able to combine both behaviours (drain and donor) at the same time (Briggs 2003, Griffiths et al 2009). Primnoids are highly represented in the Southern Ocean and further biogeographical and population genetic analyses are required to confirm and define those connections, and to confirm Antarctica as a hotspot for primnoid biodiversity.…”

Section: Taxonomic Remarksmentioning

confidence: 99%

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Revision and redescription of the species previously included in the genus <i>Amphilaphis</i> Studer and Wright in Studer, 1887 (Octocorallia: Primnoidae)

Zapata-Guardiola¹,

López–González²

2012

Sci. Mar.

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SUMMARY: The taxonomy of the primnoid genus Amphilaphis Studer and Wright in Studer, 1887 has been in a confused state for a long time and a revision of the species included in that genus has become a necessity. We have revised and redescribed the species previously included in the genus using up-to-date technology, such as polyp and sclerite images obtained with scanning electron microscopy (SEM). As a result of this study, because the type species of Amphilaphis is actually a Thouarella species, we consider the genus Amphilaphis to be no longer valid. One of the species previously considered in Amphilaphis has a set of morphological characters that are not recognizable in any of the current primnoid genera. Primnocapsa n. gen. has a dichotomous branching pattern, polyps placed singly, in spirals around the branchlets, 8 opercular scales with the inner surface keeled and with 2 mounds basally and 8 marginal scales offset from the operculars. The new genus is described and illustrated. Moreover, one of the re-examined species has been included in a new subgenus, Faxiella n. subgen. of Plumarella Gray, 1870 because it has polyps placed in pairs. Finally, the remaining re-examined species have been included in the genus Thouarella Gray, 1870, one of the most specious primnoid genera.Keywords: Cnidaria, new genus, new subgenus, Faxiella, Primnocapsa, Thouarella.RESUMEN: Revisión y redescripción de las especies incluidas previamente en el género AmphilAphis Studer y Wright en Studer, 1887 (Octocorallia: Primnoidae). -Durante mucho tiempo, el género de primnoido Amphilaphis Studer y Wright en Studer, 1887, ha sido un cajón de sastre y la revisión de las especies incluidas en este género se ha convertido en algo indispensable. Mediante el uso de la tecnología más actual, como es la microscopía electrónica de barrido (SEM), para la obtención de imágenes de pólipos y escleritos, hemos revisado y redescrito todas las especies previamente incluidas en el género. Como resultado de este estudio, y dado que la especie tipo de Amphilaphis es de hecho una especie perteneciente al género Thouarella, concluimos que el género Amphilaphis no debería considerarse válido. Una de las especies previamente consideradas en este género presenta un conjunto de caracteres morfológicos no reconocibles en ningún género de primnoido. Primnocapsa n. gen. se caracteriza por tener un patrón de ramificación dicotómico, pólipos aislados dispuestos en espiral alrededor de las ramas, ocho escamas operculares con quilla y con dos protuberancias basales y ocho escamas marginales dispuestas de forma alterna con las operculares. El nuevo género es descrito e ilustrado. Además, una de las especies re-examinadas ha sido incluida en un nuevo subgénero, Faxiella n. subgen. de Plumarella Gray, 1870 por poseer pólipos dispuestos en pares. Por último, las restantes especies re-examinadas han sido incluidas en el género Thouarella Gray, 1870, uno de los géneros de primnoidos con más especies.

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Section: Taxonomic Remarksmentioning

confidence: 99%

Section: Taxonomic Remarksmentioning

confidence: 99%

Section: Taxonomic Remarksmentioning

confidence: 99%

See 1 more Smart Citation

Revision and redescription of the species previously included in the genus <i>Amphilaphis</i> Studer and Wright in Studer, 1887 (Octocorallia: Primnoidae)

Zapata-Guardiola¹,

López–González²

2012

Sci. Mar.

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“…), with climatic conditions that varied gradually, causing migration more than extinction (Clarke 1990). This would provide new adaptative zones, creating the opportunity for a spectacular independent radiation for many Antarctic benthic taxa (Brandt 2000) like ascidians, so the Antarctic Region has been described as an "evolutionary incubator" (Briggs 2003). The expansion of the ocean basins and the development of the Polar Front and a circumpolar current maintained the isolation of the Antarctic continent and gave it much stability.…”

Section: Comparison With Other Faunamentioning

confidence: 99%

Zoogeography of the Antarctic ascidian fauna in relation to the sub-Antarctic and South America

Primo

Vázquez

2007

Antarctic Science

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This study of the relationships between the Antarctic, sub-Antarctic and South America biogeographical regions used both existing and new data. We constructed a presence/absence matrix of 237 species for 27 biogeographical divisions which included the Amsterdam-Saint Paul and Tristan da Cunha islands. Species and areas were classified using cluster analysis combined with MDS ordination. Six main groups were obtained from the species classification: 1) Amsterdam-Saint Paul, and 2) Tristan da Cunha species, 3) species from the Macquarie Province, 4) species from the sub-Antarctic Region, 5) Antarctic species and species distributed in the cold regions, 6) South American species. The biogeographical components were dominated by the endemic (although it is not as high as in other groups), Antarctic-South America and Southern Hemisphere elements. Except for Amsterdam-Saint Paul, Tristan da Cunha and Bouvet, the areas considered were grouped together with Macquarie being rather related to New Zealand regions. We speculate that the Antarctic Region may have acted as an "evolutionary incubator", providing a centre of origin for sub-Antarctic and South American ascidians.

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“…A potential explanation for this result may be found in the unusual patterns of geographic range size and endemism for tropical marine fishes. While tropical reefs represent biodiversity hotspots (Briggs 2003, Renema et al 2008, Bellwood et al 2012, Briggs and Bowen 2012, Dornburg et al 2015b, many reef-associated species possess large geographic ranges (Hughes et al 2002, Connolly et al 2003, Bellwood and Meyer 2009. Therefore, unlike terrestrial biodiversity hotspots, fine scale patterns of endemism are less common while range overlap is common Meyer 2009, Bellwood et al 2012), so that diel data collected in one locality can represent species with ranges over thousands of miles.…”

Section: Discussionmentioning

confidence: 99%

An assessment of sampling biases across studies of diel activity patterns in marine ray-finned fishes (Actinopterygii)

Dornburg

Forrestel

Moore

et al. 2017

bms

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ABSTRACT.-Understanding the promotion and regulation of circadian rhythms in marine fishes is important for studies spanning conservation, evolutionary biology, and physiology. Given numerous challenges inherent to quantifying behavioral activity across the full spectrum of marine environments and fish biodiversity, case studies offer a tractable means of gaining insights or forecasting broad patterns of diel activity. As these studies continue to accumulate, assessing whether, and to what extent, the cumulatively collected data are biased in terms of geography, habitat, or taxa represents a fundamentally important step in the development of a broad overview of circadian rhythms in marine fish. As such investigations require a phylogenetic framework, general trends in the phylogenetic sampling of marine fishes should be simultaneously assessed for biases in the sampling of taxa and trait data. Here, we compile diel activity data for more than 800 marine species from more than five decades of scientific studies to assess general patterns of bias. We found significant geographic biases that largely reflect a preference toward sampling warm tropical waters. Additionally, taxonomic biases likewise reflect a tendency toward conspicuous reef associated clades. Placing these data into a phylogenetic framework that includes all known marine fishes revealed significant under-dispersion of behavioral data and taxon sampling across the whole tree, with a few subclades exhibiting significant overdispersion. In total, our study illuminates substantial gaps in our understanding of diel activity patterns and highlights significant sampling biases that have the potential to mislead evolutionary or ecological analyses.

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Marine centres of origin as evolutionary engines

Cited by 247 publications

References 62 publications

Revision and redescription of the species previously included in the genus <i>Amphilaphis</i> Studer and Wright in Studer, 1887 (Octocorallia: Primnoidae)

Revision and redescription of the species previously included in the genus <i>Amphilaphis</i> Studer and Wright in Studer, 1887 (Octocorallia: Primnoidae)

Zoogeography of the Antarctic ascidian fauna in relation to the sub-Antarctic and South America

An assessment of sampling biases across studies of diel activity patterns in marine ray-finned fishes (Actinopterygii)

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