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Species delimitation within the genus Porcellana (Anomura, Galatheoidea, Porcellanidae) in the East Atlantic and systematic implications

Authors: Baciu, Miruna B.; Rodríguez Flores, Paula C.; Templado, José; Machordom, Annie;

Species delimitation within the genus Porcellana (Anomura, Galatheoidea, Porcellanidae) in the East Atlantic and systematic implications

Abstract

El cangrejo porcelana, Porcellana africana, fue originalmente identificado como una subespecie de Porcellana platycheles, una especie ampliamente distribuida en el océano Atlántico oriental y el mar Mediterráneo. Sin embargo, un estudio que caracterizaba la reciente invasión de P. africana en Sudáfrica arrojó dudas sobre la identificación y la distribución previamente reportada de las poblaciones de ambas especies de Porcellana, lo que podría tener implicaciones para la conservación y gestión de estas especies. En este estudio, nuestro objetivo fue delinear las especies de Porcellana del Atlántico este para obtener una comprensión más profunda de su distribución. Los análisis moleculares, basados en dos genes mitocondriales y un gen nuclear, confirmaron que P. africana es una especie bien definida y que su distribución se extiende más al norte de lo previamente considerado, incluyendo las Islas Canarias. Una estima de la divergencia temporal indicó que la cladogénesis entre P. platycheles y P. africana ocurrió durante el Neógeno, posiblemente relacionada con los drásticos cambios climáticos y ambientales que ocurrieron durante el Plioceno. Ambas especies son muy similares morfológicamente, pero pueden distinguirse por la forma del tercer esternito torácico.

The porcelain crab Porcellana africana was originally identified as a subspecies of Porcellana platycheles, a species widely distributed in the eastern Atlantic Ocean and the Mediterranean Sea. A study characterizing the recent invasion of P. africana in South Africa places doubts on the identification and previously reported distribution of populations of the two species of Porcellana, which could have implications for the conservation and management of the species. Here, we aimed to delineate the Porcellana species from the East Atlantic to gain a better understanding of their distribution, which will help in conservation decision-making. Molecular analyses based on two mitochondrial genes and a nuclear gene confirmed that P. africana is a well-defined species and that its distribution extends further north, including the Canary Islands. A time divergence estimation indicates the cladogenesis between P. platycheles and P. africana occurred during the Neogene, likely linked to drastic climatic and environmental changes that took place during the Pliocene. Both species are morphologically very close, but can be distinguished by the shape of the third thoracic sternite.

The study was supported by the project of the Spanish Ministry of Economy and Competitiveness of Spain PDI2019-108644GB-I00. PCR-F is supported by a Biodiversity postdoctoral fellowship from the Museum of Comparative Zoology of Harvard University

Peer reviewed

Keywords

Invasive species, Africa, Porcelain crab, Canary Islands, http://metadata.un.org/sdg/14, Conserve and sustainably use the oceans, seas and marine resources for sustainable development, Phylogeny, Taxonomy

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
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