A re-appraisal of the systematic status of selected genera in Palaemoninae (Crustacea: Decapoda: Palaemonidae)

Grave, Sammy De; Ashelby, Christopher W.

doi:10.11646/zootaxa.3734.3.3

Cited by 50 publications

(42 citation statements)

References 30 publications

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“…The genus Palaemon Weber, 1795 comprises 84 marine, estuarine and freshwater species in tropical and subtropical regions, including Palaemonetes Heller, 1869, which was recently considered to be a junior synonym of Palaemon by De Grave and Ashelby (2013), and the new species described here. Four strictly freshwater species occur in South America, distributed in the Amazon, Orinoco and Paraguay/lower Paraná River basins: Palaemon carteri (Gordon, 1935), Palaemon ivonicus (Holthuis, 1950) Palaemon mercedae (Pereira, 1986) and a new species described herein.…”

Section: Introductionmentioning

confidence: 90%

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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Section: Introductionmentioning

confidence: 90%

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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“…Thus, De Grave and Ashelby (2013) proposed the replacement name now in use. All members of the genus Palaemonetes were transferred to Palaemon by these authors based on morphological, cladistic and genetic evidence (Pereira 1997, Ashelby et al 2012, De Grave and Ashelby 2013, concluding that the presence/absence of mandibular palp can no longer be used as the sole character that separates both genera. Furthermore, larval development studies comparing 3 coastal Palaemonetes species with 3 species of Palaemon concluded that the differences within the genera are more pronounced that between genera, which suggests a close evolutionary relationship (Knowlton and Vargo 2004).…”

Section: Palaemon Mundusnovusmentioning

confidence: 99%

Updated checklist of estuarine caridean shrimps (Decapoda: Caridea) from the southern region of Laguna Madre, Tamaulipas, Mexico, with new records and a key for taxonomic identification

Herrera-Barquín¹,

Leija-Tristán²,

Lara³

2018

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We provide an updated list of the caridean shrimp species from the southern region of the Laguna Madre, Tamaulipas, Mexico, along with a key for taxonomic identification. The survey was conducted in 3 sites during 3 temporal seasons. A total of 2,989 specimens were collected belonging to 12 species, 6 genera, and to the following 4 families: Alpheidae, Hippolytidae, Palaemonidae, and Processidae. Hippolytidae was the most abundant family, followed by Palaemonidae, Alpheidae, and Processidae. The hippolytid Hippolyte obliquimanus Dana, 1852, the palaemonids Palaemon floridanus Chace, 1942, and P. northropi (Rankin, 1898), and the alpheid Alpheus cf. packardii Kingsley, 1880 represent new records for the Laguna Madre and selected areas of the Gulf of Mexico.

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“…1) We performed prior identification of the material based on diagnostic morphological characteristics of the species (Holthuis, 1952;Melo, 2003). Morphological analyses for clade differentiation within M. jelskii were performed based on diagnostic characters traditionally used for the family (Holthuis, 1952;Pereira, 1997;De Grave and Ashelby, 2013;Carvalho et al, 2014). Fig.…”

Section: Sampling and Morphological Analysismentioning

confidence: 99%

Distribution and genetic differentiation of Macrobrachium jelskii (Miers, 1877) (Natantia: Palaemonidae) in Brazil reveal evidence of non-natural introduction and cryptic allopatric speciation

Vera-Silva

Carvalho

Mantelatto

2016

Journal of Crustacean Biology

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A B S T R A C TMacrobrachium jelskii (Miers, 1877) occurs in all major Brazilian drainage basins. Considering its wide distribution and the supposed isolation of certain populations, we evaluated phylogenetic relationships among populations from several river basins. Analyses of molecular data using the mitochondrial COI and 16S genes suggest the division of the species into two clades, "Amazonian" and "coastal." The genetic divergence between these two groups is greater than the genetic divergence within the respective groups. Based on the time of divergence and the probable natural distribution of the species, we suggest two evolutionary scenarios to explain the origin of the coastal clade. The first scenario considers the capacity of M. jelskii to tolerate saline environments. The second is based on Pliocene climate changes that would have caused river confluence from sea level regression. The two clades occur sympatrically but this is a recent condition. The wide geographic distribution and low genetic divergence of the Amazonian clade allows us to propose that the current distribution of M. jelskii is partly due to human activity. Pending future analysis, the absence of a consistent morphological synapomorphy precludes the description of a new cryptic taxonomic entity for M. jelskii.

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A re-appraisal of the systematic status of selected genera in Palaemoninae (Crustacea: Decapoda: Palaemonidae)

Cited by 50 publications

References 30 publications

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

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

Updated checklist of estuarine caridean shrimps (Decapoda: Caridea) from the southern region of Laguna Madre, Tamaulipas, Mexico, with new records and a key for taxonomic identification

Distribution and genetic differentiation of Macrobrachium jelskii (Miers, 1877) (Natantia: Palaemonidae) in Brazil reveal evidence of non-natural introduction and cryptic allopatric speciation

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