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      Range distribution and contributions to taxonomy of Elops smithi (ELOPIFORMES: ELOPIDAE)

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          Abstract

          Abstract: This study presents the first record of Elops smithi for northern Brazil. The evidence suggests this species is being misidentified incorrectly as Elops saurus in estuaries of the Western Atlantic Ocean. Here, morphological, molecular, and cytogenetic evidence identified all ladyfish specimens from one estuary in the region as E. smithi. Thus, at least Elops smithi occurs in the northern coast of Brazil and it is recommended that specimens from this region identified as E. saurus be further investigated with genetic and cytogenetic tools in order to assure a correct species identification.

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          Most cited references37

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          Global conservation status and research needs for tarpons (Megalopidae), ladyfishes (Elopidae) and bonefishes (Albulidae)

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            Phylogenetic relations among percid fishes as inferred from mitochondrial cytochrome b DNA sequence data.

            Hypotheses of relationship among genera of Percidae have been conflicting. Based on different phylogenetic premises, the evolution of small benthic forms in Percidae has been interpreted as resulting from either convergence or common ancestry. In order to assess various phylogenetic hypotheses of Percidae we collected complete sequences (1140 bp) of mitochondrially encoded cytochrome b for 21 species of percids. Seven species representing four additional families of Perciformes were used as outgroups. Maximum parsimony and minimum evolution analyses both recovered single shortest trees, and the results of these analyses were generally congruent with one another. All analyses consistently recovered three monophyletic groups in Percidae: Etheostomatinae (Ammocrypta, Crystallaria, Etheostoma, and Percina), Percinae (Perca and Gymnocephalus), and Luciopercinae (Stizostedion, Zingel, and Romanichthys). As a result of this analysis we present a revised classification of Percidae and discuss the phylogenetic evidence for the independent evolution of small benthic species within Etheostomatinae and Luciopercinae. Copyright 1998 Academic Press.
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              A new genus of Anostomidae (Ostariophysi: Characiformes): Diversity, phylogeny and biogeography based on cytogenetic, molecular and morphological data.

              A new genus of Anostomidae (Characiformes) is described to include ten valid extant species previously classified in Leporinus or Hypomasticus and distributed throughout most major river basins in South America: L. brinco, L. conirostris, L. elongatus, H. garmani, L. macrocephalus, L. muyscorum, L. obtusidens, L. piavussu, L. reinhardti, and L. trifasciatus. The monophyly of Megaleporinus is well-supported in a phylogenetic analysis based on two mitochondrial and three nuclear genes, as well as its sister group relationship to Abramites. Megaleporinus is diagnosed by having the exclusive combination of three unicuspid teeth on each premaxillary and dentary bone and a color pattern composed of one to four dark midlateral blotches. Additional distinguishing features and possible synapomorphies include a unique ZZ/ZW sex chromosome system confirmed for six congeners and a drumming apparatus wherein the first rib is elongated and associated with hypertrophied intercostal muscles, which was confirmed for three congeners as exclusive to mature males. Furthermore, our study identified at least four undescribed cryptic species, emphasizing the need for further taxonomic work and genetic analyses. A time-calibrated phylogenetic and biogeographical analysis of the new genus suggests that speciation in the proto-Amazon-Orinoco lineage was primarily driven by paleogeographic processes, such as the formation of the Orinoco and Tocantins basins. Dispersal and diversification of the genus in coastal basins draining the Eastern Brazilian Shield appears to have been facilitated by connections between paleo-basins during low sea level periods and headwater captures between coastal and inland watersheds. The present contribution demonstrates the importance of integrating data from morphology, DNA sequences and cytogenetics to advance the taxonomy and systematics of any complex species group.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                aabc
                Anais da Academia Brasileira de Ciências
                An. Acad. Bras. Ciênc.
                Academia Brasileira de Ciências (Rio de Janeiro, RJ, Brazil )
                0001-3765
                1678-2690
                2019
                : 91
                : 4
                : e20181240
                Affiliations
                [3] orgnameUniversidade do Porto orgdiv1CIBIO/InBIO, Centro de Investigacão em Biodiversidade e Recursos Genéticos Portugal
                [5] Ananindeua PA orgnameInstituto Evandro Chagas orgdiv1Laboratório de Cultura de Tecidos e Citogenética Animal Brazil
                [1] Bragança Pará orgnameUniversidade Federal do Pará orgdiv1Laboratório de Evolução Brazil
                [2] Bragança Pará orgnameUniversidade Federal do Pará orgdiv1Laboratório de Genética e Biologia Molecular Brazil
                [4] Bragança PA orgnameLaboratório de Plâncton e Cultivo de Microalgas orgdiv1Universidade Federal do Pará Brazil
                Article
                S0001-37652019000700622
                10.1590/0001-3765201920181240
                31800702
                cd7a1973-32f4-4869-837e-7e1f8faab0f1

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 28 November 2018
                : 29 August 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 41, Pages: 0
                Product

                SciELO Brazil

                Categories
                Biological Sciences

                Elopidae,Karyotype,Ladyfish,Malacho,Mitochondrial DNA
                Elopidae, Karyotype, Ladyfish, Malacho, Mitochondrial DNA

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