Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachium potiuna (Decapoda, Palaemonidae)

Carvalho, Fabrício Lopes; Pileggi, Leonardo G.; Mantelatto, Fernando L.

doi:10.3856/vol41-issue4-fulltext-7

Cited by 24 publications

(16 citation statements)

References 34 publications

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“…; Carvalho et al . , ; Rossi & Mantelatto ). We therefore discount this relationship, which is ostensibly based on a misidentification in Kou et al .…”

Section: Discussionmentioning

confidence: 98%

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An integrative approach to the evolution of shrimps of the genus Palaemon (Decapoda, Palaemonidae)

Carvalho¹,

Grave

Mantelatto

2016

Zoologica Scripta

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Shrimps of the genus Palaemon Weber, 1795 comprise of 86 species with a wide morphological and ecological variability along the tropical and temperate regions. Studies based on molecular data have indicated that despite a recent taxonomic rearrangement, it may remain not monophyletic. On the other hand, cladistic, morphological analyses have suggested the presence of synapomorphies, implying a natural status for the genus. In this work, a broad taxonomic and molecular sampling is applied to verify whether Palaemon is a monophyletic taxon and, based on the recovered phylogeny, identify geographical and morphological patterns related to the lineages. Partial sequences of 16S rRNA, histone H3 and 18S rRNA from 60 species of Palaemon and 15 species from other genera of Palaemonidae were analysed. In addition, previously used characters as well as novel diagnostic characters were scrutinized. The present phylogeny indicates that the species of Palaemon fall into three distinct lineages and that the colonization of America and Europe likely occurred multiple times. Morphological characters allow for the identification of at least four monophyletic groups in Palaemon; two of which are monospecific at the moment. Based on the present results, it may become necessary to establish two new genera (to accommodate Palaemon concinnus and Palaemon mercedae, respectively), as well as re‐erect the genus Alaocaris Holthuis, 1949 for Palaemon antrorum, potentially including a further six American species.

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“…; Carvalho et al . , ; Rossi & Mantelatto ). We therefore discount this relationship, which is ostensibly based on a misidentification in Kou et al .…”

Section: Discussionmentioning

confidence: 98%

“…), as previously suggested for other palaemonid species (Carvalho et al . ) and fish of the Amazonian region (Cooke et al . ).…”

Section: Discussionmentioning

confidence: 99%

An integrative approach to the evolution of shrimps of the genus Palaemon (Decapoda, Palaemonidae)

Carvalho¹,

Grave

Mantelatto

2016

Zoologica Scripta

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“…The genes concatenated analysis improve the diversity of evolutionary time, consequently revealed a more consistent phylogeny compared to previous morphological and molecular phylogenetics studies (Pereira 1997, Murphy and Austin 2005, Pileggi and Mantelatto 2010). The inclusion of the member of genus Cryphiops within Macrobrachium species was maintained in the phylogeny, and raises the question whether Macrobrachium is a monophyletic group (Pereira 1997, Murphy and Austin 2005, Pileggi and Mantelatto 2010, Carvalho et al 2013, Rossi and Mantelatto 2013). …”

Section: Discussionmentioning

confidence: 99%

“…The molecular analysis was based on partial fragments of the 16S rDNA, 18S nDNA and COI mtDNA genes, which have been effective in solving different levels of relationships among decapod species (Schubart et al 2000, 2001a, b, Porter et al 2005, Pileggi and Mantelatto 2010, Mantelatto et al 2011, Vergamini et al 2011, Carvalho et al 2013, Rossi and Mantelatto 2013). …”

Section: Methodsmentioning

confidence: 99%

Molecular perspective on the American transisthmian species of Macrobrachium (Caridea, Palaemonidae)

Pileggi¹,

Rossi²,

Wehrtmann³

et al. 2014

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The closure of the Isthmus of Panama (about 3.1 million years ago) separated previously continuous populations and created two groups of extant species, which live now in the Pacific and Atlantic drainage systems. This relatively recent event was a trigger to diversification of various species in the Neotropics, nonetheless there are exemplars that do not show sufficient morphologic variability to separate them by traditional morphological tools. About 60 years ago, some freshwater decapod species with high morphological similarity were separate by previous researchers, based on geographical distribution, in Pacific and Atlantic and considered as “sister species”. However, the complete isolation of these prawns by this geographical barrier is questionable, and it has generated doubts about the status of the following transisthmian pairs of sibling species: Macrobrachium occidentale × Macrobrachium heterochirus, Macrobrachium americanum × Macrobrachium carcinus, Macrobrachium digueti × Macrobrachium olfersii, Macrobrachium hancocki × Macrobrachium crenulatum, Macrobrachium tenellum × Macrobrachium acanthurus and Macrobrachium panamense × Macrobrachium amazonicum. Here we evaluated the relation among these pairs of sibling species in a molecular phylogenetic context. We generated 95 new sequences: 26 sequences of 16S rDNA, 25 of COI mtDNA and 44 of 18S nDNA. In total, 181 sequences were analyzed by maximum likelihood phylogenetic method, including 12 Macrobrachium transisthmian species, as well as seven other American Macrobrachium species, and two other palaemonids. Our analysis corroborated the morphological proximity of the sibling species. Despite the high degree of morphological similarities and considerable genetic diversification encountered among the transisthmian sister species, our data support the conclusion that all species included in sibling groups studied herein are valid taxonomic entities, but not all pairs of siblings form natural groups.

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“…Studies with fishes reported a similar pattern, providing evidence for the effect of divergent natural selection associated with the difference in water colour between the Negro River and Solimões-Amazon River (Cooke et al 2012a,b). Genetic divergence between hydrologically different, but interconnected, environments has been reported for other palaemonid species without a conspicuous and consistent morphological differentiation (Carvalho et al 2013). However, the characters described above allow the morphological distinction between Palaemon ivonicus and Palaemon yuna sp.…”

Section: Discussionmentioning

confidence: 73%

Molecular and morphological differentiation between two Miocene-divergent lineages of Amazonian shrimps, with the description of a new species (Decapoda, Palaemonidae, Palaemon)

Carvalho¹,

Magalhães²,

Mantelatto³

2014

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Palaemon carteri (Gordon, 1935) and Palaemon ivonicus (Holthuis, 1950) are morphologically similar species of South American freshwater shrimps. Past studies have questioned the taxonomic status of both species, which are supposed to have partially sympatric geographic distributions in the Amazon basin. We analyzed a 550 bp fragment of the mitochondrial 16S rRNA gene from these Amazonian Palaemon species as well as from 11 palaemonids as the outgroup. Additionally, we checked diagnostic characters of the genus and family as well as other morphological characters that have been little explored before. Palaemon carteri and Palaemon ivonicus are allocated in two sister lineages, with wide genetic divergence and little morphological differentiation. The divergence time between these lineages was estimated as approximately 10 million years ago. Both molecular and morphological data support the taxonomic validity of both Palaemon carteri and Palaemon ivonicus, refuting the hypothesis of synonymy. In addition, a new species, Palaemon yuna sp. n., closely related to Palaemon ivonicus, is described. Our findings indicate that these species can be differentiated using the projection of the anterolateral margin and anterolateral spine of the first antennular segment, shape of the rostrum, and relative size of the appendix masculina.

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Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachium potiuna (Decapoda, Palaemonidae)

Cited by 24 publications

References 34 publications

An integrative approach to the evolution of shrimps of the genus Palaemon (Decapoda, Palaemonidae)

An integrative approach to the evolution of shrimps of the genus Palaemon (Decapoda, Palaemonidae)

Molecular perspective on the American transisthmian species of Macrobrachium (Caridea, Palaemonidae)

Molecular and morphological differentiation between two Miocene-divergent lineages of Amazonian shrimps, with the description of a new species (Decapoda, Palaemonidae, Palaemon)

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