scholarly journals Integrative taxonomy reveals disjunct distribution and first record of Hoplias misionera (Characiformes: Erythrinidae) in the Amazon River basin: morphological, DNA barcoding and cytogenetic considerations

2021 ◽  
Vol 19 (2) ◽  
Author(s):  
Karen L. A. Guimarães ◽  
Juan J. Rosso ◽  
Mendelsohn F. B. Souza ◽  
Juan M. Díaz de Astarloa ◽  
Luís R. R. Rodrigues
Keyword(s):  
Dna Barcoding ◽  
Amazon Basin ◽  
First Record ◽  
Morphological Data ◽  
Disjunct Distribution ◽  
Valid Species ◽  
Integrative Approach ◽  
Molecular Evidence ◽  
La Plata ◽  
La Plata Basin

Abstract The Hoplias malabaricus group encompasses six valid species and still is believed to harbors cryptic diversity. In this work, an integrative approach including morphological, DNA barcoding, and cytogenetic considerations was conducted to characterize a population of H. malabaricus from the Amazon basin that was recently allocated in the same mitochondrial lineage with H. misionera, a species originally described from La Plata basin. The DNA barcoding analysis revealed that the Amazon population nested together with H. misionera specimens from the La Plata basin (BIN AAB1732) in the same cluster. The intragroup distance (0.5%) was 12 times lower than the nearest neighbor (6%) distance. The morphometric analysis demonstrated slightly variation between Amazon and La Plata populations, being the former composed by larger specimens. Further morphological data supported the molecular evidence of H. misionera inhabiting Amazon basin. The karyotype characterization of H. misionera in the Amazon population showed 2n=40 and karyotypic formulae 20m+20sm, that added to C-banding, Ag-NOR and 18S results are suggestive of the similarity to karyomorph C of H. malabaricus. This work reveals the first record of H. misionera outside of La Plata basin and expands the species distribution for 2500 km northward until the Marajó Island, estuary of Amazonas River.

The bee Ruizanthedella mutabilis Spinola (Hymenoptera: Halictidae): a very common but poorly known species studied using integrative taxonomy

Zootaxa ◽  
2019 ◽  
Vol 4563 (1) ◽  
pp. 191
Author(s):  
ROCÍO A. GONZÁLEZ-VAQUERO ◽  
ARTURO ROIG-ALSINA
Keyword(s):  
Dna Barcoding ◽  
New Records ◽  
Atlantic Coast ◽  
Abundant Species ◽  
Integrative Taxonomy ◽  
Junior Synonym ◽  
Morphological Data ◽  
Valid Species ◽  
The Andes ◽  
Argentinean Patagonia

Ruizanthedella mutabilis (Spinola) is a very abundant species in Chile and the northwest of Argentinean Patagonia. In this contribution, Halictus nigrocaeruleus Spinola 1851 is established as a junior synonym of R. mutabilis (Spinola 1851), after considering morphological data, DNA barcoding results, and biological observations. The variability in the colouration of the metasoma has been incorrectly used to distinguish these colour forms as valid species. New records enlarge the distribution of the species in Argentina, from the Andes to the Atlantic coast. 

Characterisation of an Iberian population of Rhyssocolpus iuventutis Andrássy, 1971 (Dorylaimida: Nordiidae), with a revised taxonomy of the genus

Nematology ◽  
2015 ◽  
Vol 17 (2) ◽  
pp. 139-153 ◽  
Author(s):  
Reyes Peña-Santiago ◽  
Pablo Guerrero ◽  
Gracia Liébanas ◽  
María del Carmen García ◽  
Teresa Palomeque ◽  
...  
Keyword(s):  
Common Ancestor ◽  
Ssu Rdna ◽  
Morphological Data ◽  
Recent Common Ancestor ◽  
Integrative Approach ◽  
Evolutionary Relationships ◽  
Molecular Evidence ◽  
Rdna Sequences ◽  
Iberian Population ◽  
Emended Diagnosis

The identity and evolutionary relationships of the genus Rhyssocolpus are analysed and discussed using an integrative approach including morphological data and partial SSU-rDNA sequences. An Iberian population of R. iuventutis is characterised in detail, providing the first SEM observations of the genus. New sequences of the genera Enchodelus and Rhyssocolpus are provided for comparative purposes. Both morphological and molecular evidence support a separate status for the aforementioned two genera and Heterodorus, of which the latter and Rhyssocolpus shared a recent common ancestor, whereas Enchodelus did not, as had been traditionally assumed, occupy a close position. The Nordiidae is confirmed to be an artificial taxon. The taxonomy of Rhyssocolpus is revised and an emended diagnosis, updated list of species, key to their identification and compendium of their morphometrics are provided. Some nomenclatorial changes are also proposed: R. alleni and R. paradoxus are retained under Eudorylaimus, their original genus, whereas R. brasiliensis is transferred to Eudorylaimus as E. brasiliensis (Meyl, 1956) comb. n.

INTER-SEASONAL AND INTER-BASINS HYDROLOGICAL COUPLING IN SOUTH AMERICA

2021 ◽  
Author(s):  
Paulo Rodrigo Zanin ◽  
Prakki Satyamurty
Keyword(s):  
Soil Moisture ◽  
Amazon Basin ◽  
Winter Season ◽  
Western Region ◽  
South American ◽  
La Plata ◽  
La Plata Basin ◽  
Precipitation Recycling ◽  
Source Sink ◽  
Southeastern Region

AbstractThe inter-seasonal and inter-basins hydrological couplings between the Amazon and the La Plata basins are obtained with the help of ERA-5 atmospheric reanalysis, MERGE/CPTEC precipitation, GLEAM evapotranspiration and the GLDAS/Noah soil moisture datasets. The hypotheses formulated by Zanin and Satyamurty (2020a) about the hydrological processes interconnecting the Amazon Basin and the La Plata Basin are tested. A new method for finding the source-sink relationships among the boxes (regions) is presented. The precipitation recycling, frequency of source-sink behaviors, the soil moisture memory and the continental moisture transport between remote regions are evaluated. The main result of this study is that the amount of water precipitated over the Southeastern region of the Amazon Basin at the end of the South American Monsoon during autumn season, influences the amount of precipitation during winter season over the Central-western region of the La Plata Basin.

scholarly journals Neither molecular nor morphological data have all the answers; with an example from Macrobrachium (Decapoda: Palaemonidae) from Australia

Zootaxa ◽  
2011 ◽  
Vol 2874 (1) ◽  
pp. 65 ◽  
Author(s):  
TIMOTHY J. PAGE ◽  
JANE M. HUGHES
Keyword(s):  
Dna Barcoding ◽  
Molecular Data ◽  
Morphological Data ◽  
Integrative Approach ◽  
Max Planck ◽  
Call And Response

Much controversy still seems to surround the role of molecular data in general, and DNA barcoding in particular, within the taxonomic community. This has lead to numerous “call and response” pairs of papers, most recently Ebach (2011) and Mitchell (2011), but preceded by many other pairs, such as Packer et al. (2009) and Hołyński (2010). There have been numerous calls for a more “integrative” approach to taxonomy (Mitchell 2011; Stevens et al. 2011), which itself has generated point and counterpoint papers (Dayrat 2005; Valdecasas et al. 2008). This of course is how science progresses (although Max Planck suggested that science advances “one funeral at a time”, en.wikiquote.org/wiki/Max_Planck, accessed 20 March 2011).

Hygrocybe umbilicata sp. nov., with first generic report for Bangladesh and its phylogenetic placement

Phytotaxa ◽  
2016 ◽  
Vol 280 (1) ◽  
pp. 70 ◽  
Author(s):  
MD. IQBAL HOSEN ◽  
TAI-HUI LI ◽  
F. M. AMINUZZAMAN ◽  
MD. RAFIQUL ISLAM
Keyword(s):  
New Species ◽  
Internal Transcribed Spacer ◽  
Its Region ◽  
First Record ◽  
Morphological Data ◽  
Lemon Yellow ◽  
Molecular Evidence ◽  
Phylogenetic Placement

Hygrocybe umbilicata, a new waxcap of Hygrophoraceae, is formally described from Bangladesh based on morphological data and molecular evidence of the nuclear ribosomal internal transcribed spacer (ITS) region. This species represents the first record of the genus Hygrocybe for this country. It can be easily recognized by its brilliantly scarlet red with umbilicate pileus, lemon yellow stipe, white short decurrent and distant lamellae, subglobose basidiospores, and abundant clamp connections in tissues. This species belongs to genus Hygrocybe subg. Pseudohygrocybe sect. Coccineae subsect. Squamulosae. Detailed description, color photographs and illustrations of the new species are presented.

Taxonomic revision of the Cis-Andean species of Mylossoma Eigenmann & Kennedy, 1903 (Teleostei: Characiformes: Serrasalmidae)

Zootaxa ◽  
2018 ◽  
Vol 4387 (2) ◽  
pp. 275 ◽  
Author(s):  
NADAYCA T. B. MATEUSSI ◽  
CLAUDIO OLIVEIRA ◽  
CARLA S. PAVANELLI
Keyword(s):  
Endemic Species ◽  
Dna Barcode ◽  
Taxonomic Revision ◽  
Identification Key ◽  
Valid Species ◽  
La Plata ◽  
La Plata Basin

A revision of the cis-Andean species of Mylossoma is presented. Four species were recognized: M. albiscopum and M. aureum from the rio Amazonas and rio Orinoco basins; M. duriventre, from the rio Paraguai, lower rio Paraná and rio Uruguai basins; and M. unimaculatum, an endemic species from the Tocantins-Araguaia system. Both Mylossoma albiscopum and M. unimaculatum were removed from the synonymy of Mylossoma duriventre, which had its occurrence range restricted to the La Plata basin. The recognition of these four valid species corroborates the results of a previous DNA barcode study. Redescriptions of each species, and an identification key for the genus are provided. 

scholarly journals Biomass burning CCN enhance the dynamics of a mesoscale convective system over the La Plata Basin: a numerical approach

2018 ◽  
Vol 18 (3) ◽  
pp. 2081-2096
Author(s):  
Gláuber Camponogara ◽  
Maria Assunção Faus da Silva Dias ◽  
Gustavo G. Carrió
Keyword(s):  
Biomass Burning ◽  
Amazon Basin ◽  
Cloud Condensation Nuclei ◽  
Mesoscale Convective System ◽  
Mesoscale Convective Systems ◽  
Convective System ◽  
La Plata ◽  
Convective Systems ◽  
La Plata Basin ◽  
Mesoscale Convective

Abstract. High aerosol loadings are discharged into the atmosphere every year by biomass burning in the Amazon and central Brazil during the dry season (July–December). These particles, suspended in the atmosphere, can be carried via a low-level jet toward the La Plata Basin, one of the largest hydrographic basins in the world. Once they reach this region, the aerosols can affect mesoscale convective systems (MCSs), whose frequency is higher during the spring and summer over the basin. The present study is one of the first that seeks to understand the microphysical effects of biomass burning aerosols from the Amazon Basin on mesoscale convective systems over the La Plata Basin. We performed numerical simulations initialized with idealized cloud condensation nuclei (CCN) profiles for an MCS case observed over the La Plata Basin on 21 September 2010. The experiments reveal an important link between CCN number concentration and MCS dynamics, where stronger downdrafts were observed under higher amounts of aerosols, generating more updraft cells in response. Moreover, the simulations show higher amounts of precipitation as the CCN concentration increases. Despite the model's uncertainties and limitations, these results represent an important step toward the understanding of possible impacts on the Amazon biomass burning aerosols over neighboring regions such as the La Plata Basin.

scholarly journals Intense Rainfall Events Affecting the La Plata Basin

2006 ◽  
Vol 7 (4) ◽  
pp. 769-787 ◽  
Author(s):  
Viviane B. S. Silva ◽  
Ernesto H. Berbery
Keyword(s):  
Large Scale ◽  
Amazon Basin ◽  
Level Structure ◽  
Intense Rainfall ◽  
Rainfall Events ◽  
La Plata ◽  
La Plata Basin ◽  
Intense Precipitation ◽  
Eta Model ◽  
Precipitation Events

Abstract The circulation features associated with intense precipitation events over the La Plata Basin (LPB) during the austral summers of 2001/02 and 2002/03 are investigated using the Eta Model runs generated at the University of Maryland. Based on the main mode of variability over LPB, two regions were selected: (i) the region of Brazil that is at the core of the South American summer monsoon system (SAMS) and (ii) the central region of LPB in southeastern South America (SESA). First, a comparison between the 24-h total precipitation in the Eta Model and the 24-h observed precipitation was made. Results show that the Eta Model captures well the temporal variability of precipitation events in both regions, although a positive bias is noticed over SAMS. Likewise, the model reproduces the distribution of precipitation rate over SESA, but not over SAMS. Nevertheless, the distribution of the moisture flux convergence intensity, which represents the dynamical forcing, is closer in shape to the observed precipitation distribution, suggesting that the model can be a useful tool in identifying the forcing for heavy precipitation events over both regions. Composites of atmospheric and surface variables were constructed for intense precipitation events during austral summer over both regions. Intense rainfall over the central La Plata Basin (SESA) is linked to an amplified upper-tropospheric midlatitude wave pattern in which rainfall occurs just east of an enhanced cyclonic circulation. Accompanying this circulation pattern, an enhanced low-level jet (LLJ) transports warm, moist air from the Amazon toward the region, contributing to an increase in the thermal contrast over SESA. The combined patterns of thermal and dynamical variables suggest that large-scale systems, like frontal systems, are important in producing intense rainfall events. The SAMS region events have a similar upper-level structure as in SESA, but they are longer lived. In this case, the moisture fluxes are determined by an eastward shift of the LLJ, but also directly from the Amazon Basin to the north. As expected, precipitation events produce large increases of simulated runoff. The largest impact is on the SESA region, affecting the streamflow of the Paraná, Paraguay, and Uruguay, the three main rivers of the LPB.

scholarly journals Record of Caromiobenella (Copepoda, Monstrilloida) in Brazil and Discovery of the Male of C. brasiliensis: Morphological and Molecular Evidence

Diversity ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 241
Author(s):  
Judson da Cruz Lopes da Rosa ◽  
Cristina de Oliveira Dias ◽  
Eduardo Suárez-Morales ◽  
Laura Isabel Weber ◽  
Luciano Gomes Fischer
Keyword(s):  
Coastal Waters ◽  
First Record ◽  
Complex Life Cycle ◽  
Valid Species ◽  
Molecular Evidence ◽  
Nominal Species ◽  
Free Living ◽  
Western Atlantic ◽  
Local Abundance ◽  
Males And Females

Monstrilloid copepods are protelean parasites with a complex life cycle that includes an endoparasitic juvenile phase and free-living early naupliar and adult phases. The monstrilloid copepod genus Caromiobenella Jeon, Lee and Soh, 2018 is known to contain nine species, each one with a limited distribution; except for two species, members of this widespread genus are known exclusively from males. Hitherto, members of Caromiobenella have not been recorded from tropical waters of the South Western Atlantic (SWA). The nominal species Monstrilla brasiliensis Dias and Suárez-Morales, 2000 was originally described from female specimens collected in coastal waters of Espírito Santo and Rio de Janeiro (Brazil), but the male remained unknown. The failure to reliably link both sexes of monstrilloid species is one of the main problems in the current taxonomy of the group, thus leading to a separate treatment for each sex. New zooplankton collections in coastal waters and intertidal rocky pools of the SWA yielded several male and female monstrilloid copepods tentatively identified as Monstrilla brasiliensis. Our results of both morphologic and molecular (mtCOI) analyses allowed us to confirm that these males and females were conspecific. We also found evidence suggesting that Caromiobenella is not a monophyletic taxon. Our male specimens are morphologically assignable to Caromiobenella, therefore, females of the nominal species Monstrilla brasiliensis, are matched here with the aforementioned males and, thus, the species should be known as C. brasiliensis comb. nov. (Dias and Suárez-Morales, 2000). This finding represents the third documented discovery of a female of Caromiobenella, the first record of the genus in the Southwestern Atlantic, and the first documented record of monstrilloids from coastal tidepools. With the addition of C. brasiliensis, Caromiobenella now includes 10 valid species worldwide. This work represents the second successful use of molecular methods to link both sexes of a monstrilloid copepod. The male of C. brasiliensis is herein described, and a key to the known species of Caromiobenella and data on the habitat and local abundance of C. brasiliensis are also provided.

Bridging the Mozambique Channel: first record of Dombeya rosacea (Dombeyoideae, Malvaceae) for Mayotte (Comoros Archipelago, Indian Ocean)

Phytotaxa ◽  
2020 ◽  
Vol 460 (1) ◽  
pp. 75-88
Author(s):  
TIMOTHÉE LE PÉCHON ◽  
SEBASTIEN TRACLET ◽  
FABIEN BARTHELAT ◽  
ABASSI DIMASSI ◽  
LUC D. B. GIGORD ◽  
...  
Keyword(s):  
Indian Ocean ◽  
First Record ◽  
Molecular Data ◽  
Integrative Approach ◽  
Molecular Evidence ◽  
Ecological Preferences ◽  
Mozambique Channel ◽  
Area Of Occupancy ◽  
Morphological And Molecular Data

In this study, we used an integrative approach combining morphological and molecular data with ecology, in order to clarify the identity of a Dombeya newly recorded as occurring in Mayotte. Morphological and molecular evidence are in agreement and convincingly show that specimens of this newly recorded species can be confidently assigned to D. rosacea, previously known only from four herbarium sheets from Madagascar. The new populations of this species in the Comoros significantly expand the extant area of occupancy of D. rosacea. Ecological preferences are also discussed, as populations of D. rosacea were found in greatly contrasting sub-humid habitats. This newly reported geographical disjunction between the Comoros and Madagascar strengthens the evidence for a biogeographic connection between the floras of these two regions.

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