A new species of Deltamys Thomas, 1917 (Rodentia: Cricetidae) endemic to the southern Brazilian Araucaria Forest and notes on the expanded phylogeographic scenario of D. kempi 

Zootaxa ◽  
2017 ◽  
Vol 4294 (1) ◽  
pp. 71 ◽  
Author(s):  
FERNANDO MARQUES QUINTELA ◽  
FABRÍCIO BERTUOL ◽  
ENRIQUE MANUEL GONZÁLEZ ◽  
PEDRO CORDEIRO-ESTRELA ◽  
THALES RENATO OCHOTORENA DE FREITAS ◽  
...  
Keyword(s):  
New Species ◽  
South America ◽  
Dna Sequences ◽  
Posterior Margin ◽  
Southeastern Brazil ◽  
Patos Lagoon ◽  
Araucaria Forest ◽  
Phylogeographic Break ◽  
Skull Measurements ◽  
A New Species

Deltamys is a monotypic sigmodontine rodent from the Pampas of South America. In addition to the formally recognized D. kempi that inhabits lowlands, an undescribed form Deltamys sp. 2n=40 was recently found in the highlands of southeastern Brazil. In the present study, we perform a phylogeographic reassessment of Deltamys and describe a third form of the genus, endemic to the Brazilian Araucaria Forest. We describe this new species based on an integrative analysis, using complete cytochrome b DNA sequences, karyology and morphology. Bayesian tree recovered two allopatric clades (lowlands vs. highlands) and three lineages: (i) the lowland D. kempi, (ii) the highland Deltamys sp. 2n=40, and (iii) Deltamys araucaria sp. n. Deltamys araucaria sp. n. is karyotypically (2n=34) and morphologically distinguishable from D. kempi (2n=37-38), showing a tawnier dorsum/flank pelage, presence of a protostyle, M1 alveolus positioned anteriorly to the posterior margin of the zygomatic plate, and several other distinguishing characteristics. A phylogeographic assessment of D. kempi recovered two haplogroups with significant differences in skull measurements. This phylogeographic break seems to have been shaped by the Patos Lagoon estuarine channel. The diversification in Deltamys might have been triggered by dispersal of older lineages over different altitudinal ranges in the Paraná geological basin. 

A new species of the genus Gaucha Mello-Leitão, 1924 from Minas Gerais, Brazil (Solifugae, Mummuciidae)

Zootaxa ◽  
2021 ◽  
Vol 5061 (3) ◽  
pp. 559-572
Author(s):  
MAYSA F.V.R. SOUZA ◽  
RODRIGO L. FERREIRA ◽  
LEONARDO S. CARVALHO
Keyword(s):  
New Species ◽  
South America ◽  
Species Group ◽  
Minas Gerais ◽  
Southeastern Brazil ◽  
Spider Species ◽  
A New Species

A new sun-spider species of the ibirapemussu species-group of the genus Gaucha is described based on males and a female collected in Southeastern Brazil. The newly described species can be readily distinguished from its congeners by the reduction of the cheliceral fixed finger, distal tooth (FD), closely positioned and smaller than the medial tooth (FM); the presence of cheliceral fixed finger profondal subproximal (PFSP) and retrofondal submedial (RFSM) teeth; and by the cheliceral movable finger, medial tooth (MM) well developed, larger than submedial tooth (MSM) and smaller than proximal tooth (MP). This is the thirteenth described species in the genus Gaucha, all known from South America.  

A new species of Phylloicus Müller, 1880 (Trichoptera: Calamoceratidae), from southeastern Brazil, including descriptions of larval and pupal stages

Zootaxa ◽  
2011 ◽  
Vol 2748 (1) ◽  
pp. 38 ◽  
Author(s):  
FABIO B. QUINTEIRO ◽  
ADOLFO R. CALOR ◽  
CLAUDIO G. FROEHLICH
Keyword(s):  
New Species ◽  
Central America ◽  
Posterior Margin ◽  
Southeastern Brazil ◽  
Diagnostic Characters ◽  
A New Species

The cosmopolitan family Calamoceratidae Ulmer, 1906, has 8 living genera, among them Phylloicus Müller, 1880, with species distributed from South to Central America. This genus is characterized by its dark-colored adults (brown to black) with diurnal to crepuscular habits. In this paper, the adults, pupae, and larvae of Phylloicus camargoi n. sp. are described and illustrated. The new species is easily diagnosed by male tergum X bearing a short, digitate, setose, basodorsal process; 2 short, digitate, hairless, lateral processes; and 2 pairs of very short processes on the posterior margin: a pair of digitate, hairless, posterolateral processes, and a pair of posteromesal processes. Additional diagnostic characters are the presence of 3 color bands on the forewings, 2 golden longitudinal bands and a white transversal one.

The presence of Homoeoneuria s.s. (Ephemeroptera: Oligoneuriidae) in South America with the description of a new species

Zootaxa ◽  
2009 ◽  
Vol 2146 (1) ◽  
pp. 53-60 ◽  
Author(s):  
F. F. SALLES ◽  
C. N. FRANCISCHETTI ◽  
E. D. G. SOARES
Keyword(s):  
New Species ◽  
South America ◽  
Anterior Margin ◽  
Adult Stage ◽  
Color Pattern ◽  
The Other ◽  
Southeastern Brazil ◽  
Compound Eyes ◽  
Stage 1 ◽  
A New Species

In the present work a new species of Homoeoneuria is described based on nymphs and adults from Southeastern Brazil. Based on cladistics, the new species belongs to the subgenus Homoeoneuria.s.s. Homoeoneuria (H). watu sp. n., besides being the second species of the genus reported from South America, is the first representative of the subgenus from the region. The new species can be distinguished from the other described species of the genus by the following combination of characters: In the adult stage, (1) pronotum with prominent posteromedian pale yellow spot almost reaching anterior margin; (2) abdominal color pattern; (3) shape of penes. In the nymph, (1) head heavily washed with brownish-orange between compound eyes and ocelli; (2) antennal pedicels with short, thick setae; (3) small paired tubercles present on vertex and anterior margin of pronotum; (4) galea-lacinia of maxillae with submarginal row of 20–21 long, spinous setae; (5) abdominal color pattern. Comments on the biology of the new species are also provided.

New species and new report of Hyalella S. I. Smith, 1874 (Crustacea: Amphipoda: Dogielinotidae) from Minas Gerais state, Southeastern Brazil

Zootaxa ◽  
2012 ◽  
Vol 3350 (1) ◽  
pp. 58 ◽  
Author(s):  
RAFAELA BASTOS-PEREIRA ◽  
ALESSANDRA ANGÉLICA DE PÁDUA BUENO
Keyword(s):  
New Species ◽  
Species Identification ◽  
Posterior Margin ◽  
Minas Gerais ◽  
The State ◽  
Southeastern Brazil ◽  
Diverse Group ◽  
Minas Gerais State ◽  
A New Species ◽  
Janeiro State

At present, 13 species of Hyalella are recorded from Brazilian hydrographic basins. A new species of the genus was foundin the municipality of Arcos, Minas Gerais state and it is described here. Curved seta on inner ramus of male uropod 1,posterior margin of gnathopod 2 propodus shorter than palm, telson longer than wide are some of the diagnostic charatctersof this new species. The articles of maxillipod palp and propodus of gnathopod 2 are elongated as observed in H.longistila,but the new species differs from it because of the curved seta on uropod 1. Despite being large and diverse group, Hyalellais represented only by two species in the state of Minas Gerais (Southeastern Brazil), H. warminig and H. gracilicornis.The distribution of H. longistila, previously recorded in Rio de Janeiro state, was extended to Minas Gerais state. Thiswork, therefore, contributes for the knowledge of Amphipoda fauna from Brazil, describing a new species and providing a key to the species identification. From this work, the number of Hyalella species found in Brazil to 14.

Spelaeogammarus uai (Bogidielloidea: Artesiidae): a new troglobitic amphipod from Brazil 

Zootaxa ◽  
2017 ◽  
Vol 4231 (1) ◽  
pp. 38 ◽  
Author(s):  
RAFAELA BASTOS-PEREIRA ◽  
RODRIGO L. FERREIRA
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Anterior Margin ◽  
Statistical Approach ◽  
Southeastern Brazil ◽  
Apical Margin ◽  
Multivariate Statistical ◽  
Multivariate Statistical Approach ◽  
Length Width ◽  
A New Species

A new species was recently found in a cave from Southeastern Brazil, in the state of Minas Gerais, which is here described. Considering all the species of the genus, Spelaeogammarus uai sp. nov. is very similar to S. santanensis and S. sanctus, although the new species differs mainly in relation to the number of plumose setae in the apical margin of maxilliped inner plate, number of setae in the anterior margin of gnathopod 1 basis and number of setae in the posterior margin of gnathopod 2 basis. Furthermore, the ratio “length/width” of several articles of the new species is higher than in other species. An identification key of the Spelaeogammarus genus is provided, as well as a complemented multivariate statistical approach of the morphometry of the genus based on a previous work of the genus. 

On the taxonomy of southern South American species of the wolf spider genus Allocosa (Araneae: Lycosidae: Allocosinae)

Zootaxa ◽  
2017 ◽  
Vol 4216 (3) ◽  
pp. 261 ◽  
Author(s):  
MIGUEL SIMÓ ◽  
ARNO A. LISE ◽  
GABRIEL POMPOZZI ◽  
ÁLVARO LABORDA
Keyword(s):  
New Species ◽  
South America ◽  
Posterior Margin ◽  
Wolf Spider ◽  
South American ◽  
Southern Brazil ◽  
South American Species ◽  
Southern South America ◽  
First Time ◽  
A New Species

Three species of the genus Allocosa Banks, 1900 from southern South America are redescribed: Allocosa alticeps (Mello-Leitão, 1944), A. brasiliensis (Petrunkevitch, 1910) and A. senex (Mello-Leitão, 1945). The female of A. senex is described for the first time and the species is revalidated. A new species, A. marindia sp. nov. from southern Uruguay and southern Brazil is described. The new species is distinguished by the flattened terminal apophysis of the male bulb and the conspicuous pointed projections on the posterior margin of the female epigynum. The species inhabits in sandy estuarine and oceanic coasts with psammophile vegetation. 

A new species of Campsurus (Ephemeroptera: Polymitarcyidae: Campsurinae) from Argentina and Uruguay and redescription of C. evanidus and C. jorgenseni with new synonymies

Zootaxa ◽  
2011 ◽  
Vol 2965 (1) ◽  
pp. 51 ◽  
Author(s):  
DANIEL EMMERICH ◽  
CARLOS MOLINERI
Keyword(s):  
New Species ◽  
South America ◽  
Posterior Margin ◽  
Adult Stage ◽  
Life Stages ◽  
Large Size ◽  
Pan American ◽  
A New Species

The subfamily Campsurinae (Ephemeroptera: Polymitarcyidae) includes one of the most specious genera of Ephemeroptera, Campsurus (with 40 known species), with a Pan-American distribution and its greatest diversity in South America. The following new synonymies are proposed: C. evanidus Needham & Murphy, 1924 (=C. juradinus Navás, 1930) and C. jorgenseni Esben-Petersen, 1912 (=C. scutellaris Needham & Murphy, 1924). Redescriptions, drawings and photographs are provided for both species. C. vulturorum sp. nov. from Argentina and Uruguay is described and illustrated for all life stages. It is characterized, in the adult stage, by: very large size (male fore wings 15.9–20.5 mm, female fore wings 21.0–28.0 mm), posterior margin of male abdominal sternum IX convex and rounded, pedestals subrectangular with a short projection on outer-posterior margin; penes widely separated distally, each arm formed by two lobes; and in mature nymphs by: mandibular tusks robust with a large submedian tubercle and six subapical rounded and small tubercles, maxilla with a short flat and triangular membranous gill on cardo.

scholarly journals A revision of the Monodelphis glirina group (Didelphidae: Marmosini), with a description of a new species from Roraima, Brazil

2019 ◽  
Vol 100 (1) ◽  
pp. 103-117 ◽  
Author(s):  
Silvia E Pavan
Keyword(s):  
New Species ◽  
South America ◽  
Geographic Variation ◽  
Dna Sequences ◽  
Morphological Characters ◽  
Monophyletic Group ◽  
Formal Description ◽  
Group Information ◽  
A New Species ◽  
Emended Diagnosis

Abstract Short-tailed opossums of the nominotypical subgenus Monodelphis occur throughout most of the cis-Andean lowlands of tropical South America. Among its member species, a monophyletic group that includes M. glirina (Amazonian red-sided opossum), M. sanctaerosae (Santa Rosa short-tailed opossum), and an unnamed taxon, herein referred to as the Monodelphis glirina group, is the focus of this paper. I provide an emended diagnosis for species of the group, information about geographic variation in M. glirina (including M. maraxina [Marajó short-tailed opossum]), and a formal description for the unnamed taxon mentioned above. The new species, known from two savanna localities in northeastern Roraima, is geographically disjunct from its closer relatives, M. glirina and M. sanctaerosae, only known to occur south of the Amazon. The new species differs from other congeneric taxa by a set of morphological characters and by DNA sequences. Cuícas-de-cauda-curta do subgênero nominotípico Monodelphis ocorrem na maior parte das planícies cis-Andinas da América do Sul tropical. Dentre as espécies membro, o grupo monofilético que inclui M. glirina, M. sanctarosae, e um táxon ainda não descrito, referido como grupo Monodelphis glirina, é o foco do presente estudo. Aqui são fornecidas diagnoses emendadas para as espécies do grupo, informações sobre variação geográfica em M. glirina (incluindo M. maraxina), e descrição formal para o novo táxon mencionado acima. A nova espécie, conhecida de duas localidades de savana no nordeste de Roraima, encontra-se geograficamente disjunta das espécies mais proximamente relacionadas, M. glirina e M. sanctaerosae, somente conhecidas para a porção sul da Amazônia. A nova espécie difere das demais espécies congenéricas por um conjunto de características morfológicas e por sequências de DNA.

Kunzeana Oman: first record in South America, with description of a new species (Hemiptera: Cicadellidae: Typhlocybinae)

2014 ◽  
Vol 2 (23) ◽  
pp. 1
Author(s):  
Luci Boa Nova Coelho ◽  
Elidiomar Ribeiro Da-Silva ◽  
Jorge Luiz Nessimian
Keyword(s):  
New Species ◽  
South America ◽  
First Record ◽  
Minas Gerais ◽  
Southeastern Brazil ◽  
A New Species

A new species of Kunzeana Oman, 1949 (Hemiptera: Cicadellidae: Typhlocybinae), Kunzeana zantedeschia sp. nov. is described and illustrated based on specimens from Minas Gerais, southeastern Brazil. The new species differs from its congeners by a membranous sheath surrounding the aedeagal stem and a pair of short dorsal processes at aedeagus base.

First molecular phylogeny of Laevicaudata (Crustacea: Branchiopoda) with description of a new species of Lynceus from Chile and an updated key to species in the Americas

2019 ◽  
Author(s):  
Zandra M. S. Sigvardt ◽  
D. Christopher Rogers ◽  
Patricio De los Ríos ◽  
Ferran Palero ◽  
Jørgen Olesen
Keyword(s):  
New Species ◽  
South America ◽  
Molecular Phylogeny ◽  
Dna Sequences ◽  
Cross Contamination ◽  
Key To Species ◽  
Australian Species ◽  
Morphological Studies ◽  
America South ◽  
A New Species

The first molecular phylogeny of Lynceus (Crustacea: Branchiopoda: Laevicaudata) is presented together with a description of a new species of laevicaudatan branchiopod from Chile, Lynceus huentelauquensis, sp. nov. DNA sequences were obtained from six species of Lynceus using freshly collected specimens from Europe, North America, South America, and Australia and combined with GenBank sequences from previous studies. Specimens of the new species were collected from a pool on the Huentelauquén Plains near Huentelauquén City. Our molecular analyses placed L. huentelauquensis, sp. nov. within Lynceus and close to a cluster of Australian species, and revealed morphological misidentifications, cross-contamination, or incorrect upload in earlier GenBank sequences. L. huentelauquensis, sp. nov. is separated from other Lynceus primarily by the morphology of the rostrum and the male claspers. L. huentelauquensis, sp. nov. is the first described laevicaudatan from Chile, the sixth from South America, and the 13th from the Americas. The morphology of laevicaudatans from the Americas is reviewed and an updated key to the (male) Lynceidae of the region is provided. Our study highlights the necessity of a revision of Laevicaudata using multiple genetic markers as well as thorough morphological studies on a greater number of taxa. urn:lsid:zoobank.org:pub:9A783D96-B270-40DF-8361-11BA063C9A0F

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