How many kinds of sclerite? Towards a morphometric classification of gorgoniid microskeletal components

Vargas, Sergio; Breedy, Odalisca; Siles, F.; Guzmán, Héctor M.

doi:10.1016/j.micron.2009.08.009

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…Due to this limitation, the current trend in phylogenetic analysis is based on the idea of "more is better" (Winkler et al, 2015). In previous studies, mtMutS, both alone and in combination with other mitochondrial genes, has been used to examine inter-and intrageneric relationships among shallow-water Caribbean holaxonians Vargas et al, 2010b;Wirshing and Baker, 2015), Indo-Pacific alcyoniid soft corals (McFadden et al, 2006) and deep-sea gorgonians (France, 2007;Thoma et al, 2009). Indeed, mtMutS and ITS2 are two of the most commonly used and variable regions for analysis.…”

Section: Molecular Markersmentioning

confidence: 99%

Molecular phylogenetic relationships reveal contrasting evolutionary patterns in Gorgoniidae (Octocorallia) in the Eastern Pacific

Soler-Hurtado

López–González

2017

Molecular Phylogenetics and Evolution

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The description and delimitation of species in an evolutionary framework is essential for understanding patterns of biodiversity and distribution, and in the assessment of conservation strategies for natural resources. This study seeks to clarify the evolutionary history and genetic variation within and between closely related octocoral species that are fundamental to benthic marine ecosystems for harbouring a high diversity of associated fauna. For our study system, we focused on members of the Gorgoniidae family in the Eastern Pacific, particularly of the Ecuadorian littoral, a less studied marine ecosystem. According to our results, the diagnosis of the genus Pacifigorgia is here amended to include species previously considered in the genus Leptogorgia. The genera Leptogorgia and Eugorgia are included within a single clade, and neither are recovered as monophyletic. In this case, according to the priority rule of the International Code of Zoological Nomenclature (ICZN), our proposal is to include the species considered in these two genera in Leptogorgia. In addition, we found evidence of interesting speciation patterns: morphological differentiation with no apparent genetic differentiation (in Pacifigorgia), and inconsistencies between mitochondrial and nuclear data that suggest a hybridisation phenomenon (in Leptogorgia). In the first case, recent radiation, ancient hybridisation, sympatric speciation, and in the second, reticulate evolution may have contributed to the evolutionary history of the studied taxa. Therefore, incongruences observed between morphological and molecular evidences in these octocorals, and in corals in general, may reveal the types of events/patterns that have influenced their evolution.

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Section: Molecular Markersmentioning

confidence: 99%

Molecular phylogenetic relationships reveal contrasting evolutionary patterns in Gorgoniidae (Octocorallia) in the Eastern Pacific

Soler-Hurtado

López–González

2017

Molecular Phylogenetics and Evolution

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“…Sclerites are suggested to provide structural support (7) and may have a potential role of physical defense against predation (8, 9). Sclerites are also a main source of information for systematic studies because their morphology and morphometry are species-specific (10, 11). …”

Section: Introductionmentioning

confidence: 99%

Molecular Cloning and Characterization of First Organic Matrix Protein from Sclerites of Red Coral, Corallium rubrum

Debreuil

Tambutté

Zoccola

et al. 2012

Journal of Biological Chemistry

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Background: Sclerites of alcyonarian species are biominerals formed of organic matrix molecules trapped inside a mineral inorganic fraction. Results: Scleritin is a small basic organic matrix protein, synthetized by scleroblasts and incorporated into sclerites. Conclusion: Scleritin is the first organic matrix protein fully characterized and localized in the sclerites of C. rubrum . Significance: Scleritin provides information on the biomineralization pathway in C. rubrum .

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“…Some coenenchymal sclerites have been considered here as elongated capstans instead of blunt spindles, as commonly described. The morphology of some sclerites are not always easy to define in this taxon, and they can also be considered transitional forms of blunt spindles, depending on the development of the two opposite distal processes on the longitudinal axis with respect to the two central whorls with alternate tubercles (Vargas et al 2010a). In any case, if these sclerites are considered blunt spindles, they would have equivalent forms with respect to the original description of this species.…”

Section: Pacifigorgia Irenementioning

confidence: 99%

“…However, the often unwieldy older literature with no or neglected illustrations and lost or badly preserved type material have played a major role in the taxonomic confusion around octocoral systematics (Sánchez 2004, Soler-Hurtado andLópez-González 2012). Currently, variation in sclerite size, sculpture, and coloration and the relative proportion of the different sclerite types are the main criteria for species delimitation in Gorgoniidae (Williams and Lindo 1997, Breedy 2001, Sánchez et al 2007, Vargas et al 2010a). These characters vary widely and the ranges of variation have not been established for all gorgoniid taxa, hindering a robust taxonomy for the group.…”

Section: Eugorgia Danianamentioning

confidence: 99%

“…The description of sclerite type can sometimes be difficult, because of continuous variation in size and ornamentation within and between species (Williams and Lindo 1997, Sánchez et al 2003, Vargas et al 2010a. This continuum represents a major obstacle to the assignment of size intervals or ranges that could be used to define and separate possible species.…”

Section: Eugorgia Danianamentioning

confidence: 99%

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New records of the genera <em>Leptogorgia, Pacifigorgia</em> and <em>Eugorgia</em> (Octocorallia: Gorgoniidae) from Ecuador, with a description of a new species

et al. 2016

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Summary: New records of the genera Leptogorgia, Pacifigorgia and Eugorgia (Octocorallia: Gorgoniidae) on the coast of Ecuador are reported. These new records redefine the current known limit of distribution of these species on the eastern Pacific coast (from southern California to Chile). Some of these species are reported for the first time since their original description. The newly collected specimens allow for the measurement of the variability of several morphological characters, from colonial to sclerite levels. Additionally, Pacifigorgia machalilla n. sp. is described and compared with its closest relatives. Morphological differentiation among related species is supported by genetic divergence estimated from an extended barcode of MutS + Igr + COI.Keywords: Gorgoniidae; eastern Pacific; distribution; mtMutS; COI; barcode; Igr.Nuevos registros de los géneros Leptogorgia, Pacifigorgia y Eugorgia (Octocorallia: Gorgoniidae) en Ecuador, con la descripción de una especie nueva Resumen: Se han obtenido nuevos registros para los géneros Leptogorgia, Pacifigorgia y Eugorgia (Octocorallia: Gorgoniidae) en la costa de Ecuador. Estos nuevos registros redefinen el límite actual conocido en la distribución de estas especies en la costa del Pacífico Oriental (desde el sur de California hasta Chile). Algunas de estas especies han sido registradas por primera vez desde su descripción original. Las nuevas muestras recogidas permiten medir la variabilidad de los caracteres morfológicos, desde el nivel de colonia hasta el de esclerito. Además, se describe la especie Pacifigorgia machalilla n. sp., y se compara con sus congéneres más relacionados. Las diferenciaciones morfológicas encontradas entre estas especies, están apoyadas por la divergencia genética estimada a partir del "código de barras" ampliado, formado por los genes MutS + Igr + COI.Palabras clave: Gorgoniidae; este del Pacífico; distribución; mtMutS; COI; "código de barras"; Igr.

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How many kinds of sclerite? Towards a morphometric classification of gorgoniid microskeletal components

Cited by 8 publications

References 11 publications

Molecular phylogenetic relationships reveal contrasting evolutionary patterns in Gorgoniidae (Octocorallia) in the Eastern Pacific

Molecular phylogenetic relationships reveal contrasting evolutionary patterns in Gorgoniidae (Octocorallia) in the Eastern Pacific

Molecular Cloning and Characterization of First Organic Matrix Protein from Sclerites of Red Coral, Corallium rubrum

New records of the genera <em>Leptogorgia, Pacifigorgia</em> and <em>Eugorgia</em> (Octocorallia: Gorgoniidae) from Ecuador, with a description of a new species

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