Redescription of Orthopristis ruber and Orthopristis scapularis (Haemulidae: Perciformes), with a hybridization zone off the Atlantic coast of South America

Zootaxa ◽  
2019 ◽  
Vol 4576 (1) ◽  
pp. 109 ◽  
Author(s):  
ALEXANDRE PIRES MARCENIUK ◽  
RODRIGO ANTUNES CAIRES ◽  
LEONARDO MACHADO ◽  
NAJILA NOLIE CATARINE DANTAS CERQUEIRA ◽  
RAYLA ROBERTA M. DE S. SERRA ◽  
...  
Keyword(s):  
South America ◽  
Nuclear Dna ◽  
Atlantic Coast ◽  
Morphological Characteristics ◽  
Distinct Species ◽  
Valid Species ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Western Atlantic ◽  
Coloration Patterns

The genus Orthopristis includes seven valid species, three from the western Atlantic and five from eastern Pacific, while the available identification guides and taxonomic keys incorrectly recognize Orthopristis ruber as the only valid species found on the Atlantic coast of South America. Efforts to expand the inventory of fish species from the northern coast of Brazil led to the identification of two distinct species of Orthopristis from Atlantic South America, based on the analysis of coloration patterns and meristic data, as well as DNA. In the present study, the limits of Orthopristis ruber are reviewed, while Orthopristis scapularis is recognized as a valid species for the northern and northeastern coasts of South America. Based on intermediate morphological characteristics and nuclear DNA markers, a hybrid zone was identified off the state of Espírito Santo, on the eastern Brazilian coast. Additionally, considerations are made on the diversity and biogeography of the coastal marine and estuarine fishes found on the Brazilian coast. 

scholarly journals Morphological description of six species of Suberitida (Porifera: Demospongiae) from the unexplored north-eastern coast of Brazil, with emphasis on two new species

2020 ◽  
Vol 100 (3) ◽  
pp. 389-400
Author(s):  
Humberto F. M. Fortunato ◽  
Thierry Pérez ◽  
Gisele Lôbo-Hajdu
Keyword(s):  
Current Knowledge ◽  
Atlantic Coast ◽  
Marine Sponges ◽  
Eastern Coast ◽  
Morphological Description ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Western Atlantic ◽  
The North ◽  
North Eastern

AbstractThe Order Suberitida is defined as a group of marine sponges without an obvious cortex, a skeleton devoid of microscleres, and with a deletion of a small loop of 15 base pairs in the secondary structure of the 28S rDNA as a molecular synapomorphy. Suberitida comprises three families and 26 genera distributed worldwide, but mostly in temperate and polar waters. Twenty species were reported along the entire Brazilian coast, and although the north-eastern coast of Brazil seems to harbour a rich sponge fauna, our current knowledge is concentrated along the south-eastern Atlantic coast. A survey was implemented along the northern coast of Brazil, and the collection allowed the identification of six species belonging to the Order Suberitida. Two of them are considered new to science: Suberites purpura sp. nov., Hymeniacidon upaonassu sp. nov., and four, Halichondria (Halichondria) marianae Santos, Nascimento & Pinheiro, 2018, Halichondria (H.) melanadocia de Laubenfels, 1936, Suberites aurantiacus (Duchassaing & Michelotti, 1864), and Terpios fugax Duchassaing & Michelotti, 1864, are re-described. Taxonomic comparisons are made for Tropical Western Atlantic species and type species of the four genera. Finally, an identification key for the Western Atlantic Suberites species is provided.

scholarly journals Early Pleistocene lineages of Bagre bagre (Linnaeus, 1766) (Siluriformes: Ariidae), from the Atlantic coast of South America, with insights into the demography and biogeography of the species

2016 ◽  
Vol 14 (2) ◽  
Author(s):  
Wemerson C. da Silva ◽  
Alexandre P. Marceniuk ◽  
João Braullio L. Sales ◽  
Juliana Araripe
Keyword(s):  
South America ◽  
Atlantic Coast ◽  
Early Pleistocene ◽  
Eastern Coast ◽  
Distribution Area ◽  
Northern Coast ◽  
Marine Environments ◽  
Larval Stages ◽  
Physical Barriers ◽  
Northeast Coast

ABSTRACT Coastal and marine environments are characterized by a lack of evident physical barriers or geographic isolation, and it may be difficult to understand how divergence can arise and be sustained in marine environments. The identification of 'soft' barriers is a crucial step towards the understanding of gene flow in marine environments. The marine catfishes of the family Ariidae are a demersal group with restricted migratory behavior, no pelagic larval stages, and mechanisms of larval retention, representing a potentially useful model for the understanding of historical processes of allopatric speciation in the marine environment. In the present study, two lineages of the Coco sea catfish, Bagre bagre , were recognized from their complete segregation at both mitochondrial and morphological levels. One lineage is distributed between Venezuela and the northern coast of Brazil, including the semiarid northeast coast, while the second lineage is found on the eastern coast of Brazil, including the humid northeast coast. Based on distribution area, habitats preference, and genetic variability, inferences are made in relation to biogeography and demography of lineages in Atlantic coast of South America.

A new species of Gastrophanella from central western Atlantic, with a discussion of the family Siphonidiidae (Demospongiae: Lithistida)

2000 ◽  
Vol 80 (4) ◽  
pp. 599-605 ◽  
Author(s):  
G. Muricy ◽  
J.V. Minervino
Keyword(s):  
New Species ◽  
New Caledonia ◽  
Valid Species ◽  
Brazilian Coast ◽  
Western Atlantic ◽  
North East ◽  
The Family ◽  
Fernando De Noronha ◽  
The Caribbean ◽  
A New Species

A new species of Gastrophanella, G. cavernicola sp. nov. (Demospongiae: Siphonidiidae), is described from submarine caves in Fernando de Noronha Island (north-east Brazil), Carrie Bow Cay and Columbus Cay, Belize (central Western Atlantic), at depths of 5-30 m. It differs from all other species of the genus by its lobate shape with thin superficial canals and centrotylote tylostrongyles. Gastrophanella cavernicola sp. nov. is the second record of the genus Gastrophanella from both Brazil and the Caribbean. It is the sixth ‘lithistid’ sponge reported from the Brazilian coast, whereas at least 32 other desma-bearing sponges are known from the Caribbean. The genus now includes five valid species, G. implexa Schmidt from the West Indies (type species), G. mammilliformis Burton from South Africa, G. primore Gómez from the Pacific Coast of Mexico, G. stylifera Mothes & Silva from south Brazil, and G. cavernicola sp. nov. from north-east Brazil and Belize. Aciculites oxytylota Lévi & Lévi from New Caledonia is transferred to Siphonidium Schmidt. The family Siphonidiidae Lendenfeld, which is probably related to order Hadromerida, is redefined to contain only Siphonidium and Gastrophanella, both with fused rhizoclone desmas associated to microspined exotyles.

scholarly journals Multiloci analyses suggest synonymy among Rhomboplites, Ocyurus and Lutjanus and reveal the phylogenetic position of Lutjanus alexandrei (Lutjanidae: Perciformes)

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Ivana Veneza ◽  
Raimundo da Silva ◽  
Danillo da Silva ◽  
Grazielle Gomes ◽  
Iracilda Sampaio ◽  
...  
Keyword(s):  
Coastal Zone ◽  
Dna Sequences ◽  
Endemic Species ◽  
Phylogenetic Relationships ◽  
Nuclear Dna ◽  
Genetic Identity ◽  
Phylogenetic Position ◽  
Brazilian Coast ◽  
Western Atlantic ◽  
Phylogenetic Hypotheses

ABSTRACT Lutjanidae comprises 21 genera and 135 species widespread throughout Atlantic, Indian and Pacific oceans. Nonetheless, the phylogenetic relationships of Lutjaninae remain uncertain. Furthermore, phylogenetic hypotheses for Lutjanus alexandrei, an endemic species from northeastern Brazilian coast, in Lutjanidae are absent so far. Therefore, we carried out multiloci analyses, combining both mitochondrial and nuclear DNA sequences in Lutjaninae species from Western Atlantic focusing on the controversial relationships among Lutjanus, Rhomboplites, and Ocyurus. Besides, we determined the phylogenetic position and dated the origin of L. alexandrei. The phylogenetics trees based on the 4.4 kb for 11 species corroborated the synonym among Lutjanus and the putative monotypic genera. For the dating of L. alexandrei, another nucleotide dataset (3.0 kb; 40 species) validated the genetic identity of this species that diverged from the sister taxon L. apodus between 2.5 - 6.5 Mya, probably as a result of the barrier caused by the muddy outflow from Orinoco and Amazon rivers along the coastal zone. This report is the most robust multiloci analysis to confirm the synonymy of the three genera of Lutjaninae from Western Atlantic and the first reliable inference about the phylogenetic relationships and origin of L. alexandrei.

First record of the genusOnchidoris(Gastropoda: Nudibranchia: Onchidorididae) from the South Atlantic Ocean, with the description of a new species from Brazil

2011 ◽  
Vol 91 (2) ◽  
pp. 505-511 ◽  
Author(s):  
Juliana Alvim ◽  
Vinicius Padula ◽  
Alexandre Dias Pimenta
Keyword(s):  
New Species ◽  
Atlantic Coast ◽  
First Record ◽  
Egg Mass ◽  
Northern Coast ◽  
The South ◽  
Western Atlantic ◽  
The Family ◽  
Lecithotrophic Development ◽  
A New Species

A new species of the genusOnchidorisis described from the south-western Atlantic, on the coast of Brazil, in the States of Rio de Janeiro and São Paulo. To date, the genusOnchidorisis known almost exclusively from the northern hemisphere, especially the Atlantic coast of Europe and the Mediterranean Sea. The single previous record from the southern hemisphere isOnchidoris maugeansis, described from Australia. This is the first record of the family Onchidorididae from the coast of Brazil.Onchidoris brasiliensissp. nov. is very similar toOnchidoris depressa, from England and the northern coast of Spain, but is distinguished by the presence of a triangular protuberance on the edge of the inner lateral radular tooth and a wide closed branchial circle with tubercles inside. Furthermore, the egg mass of O.brasiliensissp. nov. contains a single row of eggs, whereas that ofO. depressahas multiple rows.Onchidoris brasiliensissp. nov. has lecithotrophic development, the first record of this type of development in the genus. There is a relationship betweenO. brasiliensissp. nov. and the bryozoanParasmittina protecta.

Phylogeny and systematics of the Crocidura suaveolens species group: corroboration and controversy between nuclear and mitochondrial DNA markers / Phylogénie et systématique du groupe d'espèces Crocidura suaveolens: coordination et contradiction des marqueurs nucléaire et mitochondriaux de l'ADN

Mammalia ◽  
2006 ◽  
Vol 70 (1-2) ◽  
Author(s):  
Anna A. Bannikova ◽  
Vladimir S. Lebedev ◽  
Dmitri A. Kramerov ◽  
Mikhail V. Zaitsev
Keyword(s):  
Phylogenetic Relationships ◽  
Western Europe ◽  
Nuclear Dna ◽  
Sequence Data ◽  
Morphological Characteristics ◽  
Distinct Species ◽  
Species Group ◽  
Systematic Research ◽  
Cyt B ◽  
Cyt B Gene

AbstractDespite obvious advances in systematic research on Palaearctic white-toothed shrews ( Crocidura ), phylogenetic relationships and species diagnosis of 40-chromosome species ( suaveolens sp. group) remain poorly understood. Phylogenetic relationships of these shrews were analyzed on the basis of two independent molecular markers: interspersed repeat PCR fingerprints (inter-SINE-PCR) and complete (1140 bp) or partial (∼400 bp) sequences of the mtDNA cyt b gene. According to these data, C. suaveolens from Western Europe (Italy) appeared distinct from samples of C. suaveolens from Eastern Europe and Mongolia, as well as a Siberian sample. mtDNA introgression of Eastern European C. suaveolens with C. gueldenstaedtii in their contact zone in the Tuapse region was revealed. Hybrydization between C. gueldenstaedtii and C. suaveolens resulted in the formation of a population, nuclear DNA and morphological characteristics typical for C. gueldenstaedtii , while the mitochondrial genome is assimilated from C. suaveolens . The population of the Talysh region of the Caucasus ( C. caspica ) represents a separate entity that is clearly distinguished from the populations of Georgia and Tuapse ( C. gueldenstaedtii ) and C. suaveolens . Therefore, the position of C. caspica as a full species is supported. The present analysis of both inter-SINE-PCR and cyt b sequence data revealed two major clades in Palaearctic 40-chromosome Crocidura . The eastern clade is formed by true C. suaveolens/C. sibirica , together with C. caspica , and the western clade is formed by Western European C. suaveolens , which should be treated as a distinct species, C. mimula and the closely related C. gueldenstaedtii.

Phylogeny and systematics of the Crocidura suaveolens species group: corroboration and controversy between nuclear and mitochondrial DNA markers / Phylogénie et systématique du groupe d'espèces Crocidura suaveolens: coordination et contradiction des marqueurs nucléaire et mitochondriaux de l'ADN

Mammalia ◽  
2006 ◽  
Vol 70 (1-2) ◽  
Author(s):  
Anna A. Bannikova ◽  
Vladimir S. Lebedev ◽  
Dmitri A. Kramerov ◽  
Mikhail V. Zaitsev
Keyword(s):  
Phylogenetic Relationships ◽  
Western Europe ◽  
Nuclear Dna ◽  
Sequence Data ◽  
Morphological Characteristics ◽  
Distinct Species ◽  
Species Group ◽  
Systematic Research ◽  
Cyt B ◽  
Cyt B Gene

AbstractDespite obvious advances in systematic research on Palaearctic white-toothed shrews ( Crocidura ), phylogenetic relationships and species diagnosis of 40-chromosome species ( suaveolens sp. group) remain poorly understood. Phylogenetic relationships of these shrews were analyzed on the basis of two independent molecular markers: interspersed repeat PCR fingerprints (inter-SINE-PCR) and complete (1140 bp) or partial (∼400 bp) sequences of the mtDNA cyt b gene. According to these data, C. suaveolens from Western Europe (Italy) appeared distinct from samples of C. suaveolens from Eastern Europe and Mongolia, as well as a Siberian sample. mtDNA introgression of Eastern European C. suaveolens with C. gueldenstaedtii in their contact zone in the Tuapse region was revealed. Hybrydization between C. gueldenstaedtii and C. suaveolens resulted in the formation of a population, nuclear DNA and morphological characteristics typical for C. gueldenstaedtii , while the mitochondrial genome is assimilated from C. suaveolens . The population of the Talysh region of the Caucasus ( C. caspica ) represents a separate entity that is clearly distinguished from the populations of Georgia and Tuapse ( C. gueldenstaedtii ) and C. suaveolens . Therefore, the position of C. caspica as a full species is supported. The present analysis of both inter-SINE-PCR and cyt b sequence data revealed two major clades in Palaearctic 40-chromosome Crocidura . The eastern clade is formed by true C. suaveolens/C. sibirica , together with C. caspica , and the western clade is formed by Western European C. suaveolens , which should be treated as a distinct species, C. mimula and the closely related C. gueldenstaedtii.

Taxonomic status of the amphi-Atlantic species Plesionika acanthonotus (Caridea: Pandalidae): a multi-locus and morphological approach

Zootaxa ◽  
2019 ◽  
Vol 4590 (4) ◽  
pp. 457
Author(s):  
IRENE A. CARDOSO ◽  
GHENNIE T. RODRÍGUEZ-REY ◽  
MARIANA TEROSSI ◽  
CÁTIA BARTILOTTI ◽  
CRISTIANA S. SEREJO
Keyword(s):  
Dna Sequences ◽  
Nuclear Gene ◽  
Taxonomic Status ◽  
Distinct Species ◽  
Mitochondrial Genes ◽  
Valid Species ◽  
Western Atlantic ◽  
Morphological Studies ◽  
Histone 3 ◽  
Two Populations

Deep-sea shrimps of the species Plesionika acanthonotus (Smith, 1882) and P. holthuisi Crosnier & Forest, 1968 are morphologically similar and exhibit overlapping amphi-Atlantic distributions. In the literature, through morphological studies, there are reports of doubts about the validity of P. holthuisi and some authors believe that the eastern and western Atlantic populations of P. acanthonothus could represent two distinct species. The objective of the present study was to use molecular data to elucidate the taxonomic status of the two populations of P. acanthonothus. DNA sequences of two mitochondrial genes (16S rDNA and Cytochrome Oxidase subunit I) and a nuclear gene (Histone 3) were obtained for both species and for both populations of P. acanthonotus. The sequences were also obtained from Genbank for comparison. The trees (separate and multi-locus/partitioned genes) were generated by Bayesian Inference analyzes, and genetic divergence (Kimura-2-parameters) was also calculated. All specimens that had their DNA sequenced were examined morphologically to confirm their identification; morphological variations were noted. The genetic data showed that Plesionika holthuisi is closely related to P. acanthonotus, but clearly separated, indicating that P. holthuisi is a valid species. In the multi-locus analysis, the P. acanthonothus specimens were divided into two clades, one with the eastern Atlantic specimens and another with the western Atlantic specimens. However, this genetic separation was considered to be a population structuring for three reasons: (1) the genetic divergences of the two mitochondrial genes between these two groups (eastern Atlantic X western Atlantic) were smaller than the interspecific divergence for Plesionika; (2) the P. acanthonothus sequences of the Histone 3 gene showed no genetic variation; (3) in the analyzed individuals, no valid morphological character was found to support this separation. Thus, the conclusion of this study is that P. holthuisi probably is a valid species and P. acanthonothus presents two populations with mitochondrial divergences that could be in the process of speciation, but which currently represent only one species.

scholarly journals First record of Pallenopsis fluminensis (Krøyer, 1844) (Pycnogonida: Pallenopsidae) for the coast of the state of Paraíba (northeastern Brazil)

2017 ◽  
Vol 1 (1) ◽  
pp. 19
Author(s):  
Rudá Amorim Lucena ◽  
Silvio Felipe B. Lima ◽  
Martin Lindsey Christoffersen
Keyword(s):  
South America ◽  
Atlantic Coast ◽  
First Record ◽  
The State ◽  
Northeastern Brazil ◽  
Tropical Region ◽  
Western Atlantic ◽  
The Family ◽  
Fourth Species ◽  
Distal Border

<p align="justify">Uma espécie de picnogonídeo classificada na família Pallenopsidae Fry, 1978 e no gênero Pallenopsis Wilson, 1881 é registrada neste estudo para a costa do estado da Paraíba (nordeste do Brasil), com base na identificação de três espécimes fêmeas coletadas na zona infralitoral em profundidades de 12 a 34 metros. Pallenopsis fluminensis (Krøyer, 1844) é a quarta espécie de Pycnogonida registrada para a região. Até então, apenas Anoplodactylus batangensis (Helfer, 1938), A. eroticus Stock, 1968 e A. mirim Lucena, Araújo &amp; Christoffersen, 2015 haviam sido registradas para a costa da Paraíba. Pallenopsis fluminensis é diagnosticada pelo tronco com setas pequenas na borda distal de cada segmento; probóscide com setas terminais; processos laterais com pequenas setas dorsais; palpos sem setas e reduzidos a um pequeno tubérculo; quela com muitas setas, palma 1.5 vezes mais longa que larga; ovígeros com oito artículos nas fêmeas, sendo os artículos 5 e 6 subiguais, e o 8 pouco menor que o 7; e a tíbia 1 sem uma cobertura densa de setas. Até o momento, P. fluminensis é a única congênere proveniente da costa Atlântica da América do Sul sem uma densa cobertura de setas sobre a tíbia 1.</p><p align="justify"><strong>Palavras chave</strong>: Arthropoda, Chelicerata, Pantopoda, Atlântico oeste, região tropical, zona costeira.</p><p align="justify"><strong>Abstract</strong>: A pycnogonid species classified in the family Pallenopsidae Fry, 1978 and the genus Pallenopsis Wilson, 1881 is recorded in this study for the coast of the state of Paraíba in northeastern Brazil based on the identification of three female specimens collected from the infralittoral zone at depths of 12 to 34 meters. Pallenopsis fluminensis (Krøyer, 1844) is the fourth species of Pycnogonida recorded for the region. To date, only Anoplodactylus batangensis (Helfer, 1938), A. eroticus Stock, 1968 and A. mirim Lucena, Araújo &amp; Christoffersen, 2015 have been recorded for the coast of the state of Paraíba. Pallenopsis fluminensis is diagnosed by a trunk with small setae on the distal border of each segment; proboscis with terminal setae; lateral processes with small setae; palps without setae and reduced to a small knob; chela with many setae, palm 1.5 times longer than wide; ovigers with eight articles on females, articles 5 and 6 subequal and article 8 not much smaller than 7; and tibia 1 without dense cover of the setae. To date, P. fluminensis is the only congener from the Atlantic coast of South America without a dense cover of setae on tibia 1.</p><p align="justify"><strong>Key words</strong>: Arthropoda, Chelicerata, Pantopoda, Western Atlantic, tropical region, coastal zone.</p>

scholarly journals Description and distribution of Nemacystus howei (W.R. Taylor) Kylin (Chordariaceae) from the northern coast of the Yucatán peninsula

2020 ◽  
Vol 99 (1) ◽  
pp. 161-168
Author(s):  
Ileana Ortegón-Aznar ◽  
Ana M. Suárez ◽  
María del Carmen Galindo-de Santiago ◽  
Michael J. Wynne
Keyword(s):  
Sea Water ◽  
Yucatan Peninsula ◽  
Atlantic Coast ◽  
Morphological Characteristics ◽  
Small Mass ◽  
North Coast ◽  
Northern Coast ◽  
Yucatán Peninsula ◽  
Dry And Rainy Seasons ◽  
Light Brown Color

Background: There are few studies about Nemacystus on the Atlantic coast, and N. howei has been reported only once for Mexico; that record, however, did not provide a description of this species. Question: What are the morphological characteristics of Nemacystus howei and its distribution on the Yucatan coast? Species study: Macroalgae, Phaeophyceae, Nemacystus howei. Study site and year of study: North coast of Yucatán Peninsula of Mexico. Dry and rainy seasons from 2017 to 2019. Methods: Sampling was carried out at five localities, at 5 and 10 m depths, with scuba equipment. Specimens were preserved in diluted formalin in sea water; silica gel and dried-pressed vouchers are housed at the UADY Results: Six samples were collected at the five localities. Each one contains a small mass of filamentous of specimens of Nemacystus howei, that were found only during dry season, at both depths sampled. This alga has a thallus of an entangled filamentous mass of cylindrical, mucilaginous axes, of a light brown color. Younger branches have a solid central axis. Branching is abundant. The main, older axes are hollow. The assimilatory filaments are branched a few times, producing uniseriate colorless hairs and with plurilocular sporangia arising from the base. Nemacystus howei is easily confused with Cladosiphon occidentalis Kylin due to their similar morphology, branching pattern, and size. Conclusion: The significant morphological similarities between these species as well as the paucity of specific works on the Phaeophyceae of the Yucatan Peninsula may explain why Nemacystus howei had not been previously reported.

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