Anophtalmic and epigean? Description of an intriguing new species of Hyalella (Amphipoda, Hyalellidae) from Brazil

Zootaxa ◽  
2018 ◽  
Vol 4407 (2) ◽  
pp. 254 ◽  
Author(s):  
RAFAELA BASTOS-PEREIRA ◽  
MARCUS PAULO ALVES DE OLIVEIRA ◽  
RODRIGO L. FERREIRA
Keyword(s):  
New Species ◽  
Water Flow ◽  
Posterior Margin ◽  
High Water ◽  
Minas Gerais ◽  
Predation Avoidance ◽  
Iron Quadrangle ◽  
Different Types ◽  
Subterranean Environment

The absence of eyes in Hyalella (Hyalellidae, Amphipoda) is typical of obligate groundwater-dwelling species. However, a new intriguing blind amphipod of this genus was found in epigean streams from the Iron Quadrangle (state of Minas Gerais, Brazil). Hyalella troglofugia sp nov. presents antenna 1 shorter than antenna 2, gnathopod 1 propodus inner face with four setae, gnathopod 2 propodus posterior margin longer than palm, dactylus slightly longer than palm, pereopod 5 shorter than others and uropod 3 shorter than telson. The absence of eyes and presence of reduced U3 and pereopods of H. troglofugia sp nov. may suggest that such species also inhabits interstitial subterranean spaces. Moreover, the presence of the new species on streams associated to distinct hydrological zones indicates that this species may be present in different types of subterranean habitats of the region. We hypothesize that at least part of the population of this species may have left the subterranean environment looking for food and when out of this habitat it preferentially inhabits high water flow stretches of the stream in function of predation avoidance. 

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.

Seven new species of the spider genus Matta Crosby from caves in the State of Minas Gerais, Brazil (Araneae, Tetrablemmidae)

Zootaxa ◽  
2019 ◽  
Vol 4559 (3) ◽  
pp. 401
Author(s):  
ANTONIO D. BRESCOVIT ◽  
IGOR CIZAUSKAS
Keyword(s):  
New Species ◽  
Minas Gerais ◽  
The State ◽  
Morphological Features ◽  
Subterranean Environment

Seven new species of the spider genus Matta are described from caves in the State of Minas Gerais, Brazil: M. zuiuda sp. n., Matta pititinha sp. n., Matta humhum sp. n., Matta cambito sp. n., Matta humrrum sp. n., Matta nuusga sp. n., and Matta teteia sp. n. Among these seven species, six have morphological features consistent with specialization to the subterranean environment and we hypothesize that they are troglobites. One species, Matta zuiuda sp. n., shares morphology similar to M. hambletoni Crosby and M. angelomachadoi Brescovit which are known from surface populations in the State of Minas Gerais. 

scholarly journals Two new Critically Endangered species of Ditassa (Apocynaceae) from the threatened cangas of the Iron Quadrangle, Minas Gerais, Brazil

2020 ◽  
Vol 153 (2) ◽  
pp. 246-256
Author(s):  
Cássia Bitencourt ◽  
Moabe Ferreira Fernandes ◽  
Fábio Da Silva do Espírito Santo ◽  
Alessandro Rapini
Keyword(s):  
New Species ◽  
Species Recognition ◽  
Conservation Status ◽  
The United States ◽  
Minas Gerais ◽  
Critically Endangered ◽  
Anthropogenic Pressure ◽  
Iron Quadrangle ◽  
Two New Species ◽  
The Impact

Background and aims – Vegetation on ironstone outcrops is highly threatened, particularly due to the impact of mining. In this study, two new species of Ditassa (Metastelmatinae, Asclepiadoideae, Apocynaceae) from the cangas of the Iron Quadrangle (Minas Gerais, Brazil) are described and illustrated, and their conservation status is discussed.Material and methods – Species recognition is based on a morphological and molecular study of recent and historical collections, including a survey of the main herbaria of Brazil, Europe and the United States. Conservation status assessments are based on the evaluation of areas of occupancy and the impact of iron mining in the region.Key results – The two new species are morphologically similar to species in the “Hemipogon from the Espinhaço” clade, which includes Morilloa. Nevertheless, they exhibit flowers with a double corona and are described in Ditassa here, following preliminary phylogenetic analyses with 73 plastid-coding regions. These species are known from only two highly disturbed locations each and are Critically Endangered. A key to identify the 14 species of Metastelmatinae currently recorded in cangas of the Iron Quadrangle is provided.Conclusion – The Critically Endangered Ditassa cangae and D. ferricola are examples of poorly known, nearly extinct species under strong anthropogenic pressure caused by intense mining activities and the lack of adequate legislation for the protection of canga landscapes.

scholarly journals Description of a new species of Pareiorhaphis (Loricariidae: Neoplecostominae) from the rio Jequitinhonha basin, Minas Gerais, eastern Brazil

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
Edson H. L. Pereira ◽  
Tiago C. Pessali ◽  
Francisco de Andrade ◽  
Roberto E. Reis
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Color Pattern ◽  
Minas Gerais ◽  
Caudal Peduncle ◽  
Brown Stripe ◽  
Eastern Brazil ◽  
Minas Gerais State ◽  
A New Species ◽  
Lateral Plates

ABSTRACT A new species of the loricariid genus Pareiorhaphis is described based on specimens from several tributaries of the upper and middle rio Jequitinhonha basin, Minas Gerais State, eastern Brazil. The new species increases the number of known species of Pareiorhaphis to 25 and, at the same time, represents the second member of the subfamily Neoplecostominae reported from the rio Jequitinhonha basin. The new species is diagnosed from all remaining congeners by a putative autapomorphic feature related to the color pattern: a well-defined, dark brown stripe on the median series of lateral plates that extends along the flank from the posterior margin of compound pterotic to the caudal-fin base. The shallow caudal peduncle and the comparatively larger number of dentary teeth also distinguish the new species from most congeners. The new species is also compared to Pareiorhaphis stephanus, a syntopic congener with similar traits.

Hermesorchestia alastairi gen. et sp. nov. from Australia (Talitridae: Senticaudata: Amphipoda: Crustacea)

Zootaxa ◽  
2017 ◽  
Vol 4311 (4) ◽  
pp. 491
Author(s):  
LAUREN ELIZABETH HUGHES ◽  
JAMES KENNETH LOWRY
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Sand Dunes ◽  
Three Dimensional ◽  
High Water ◽  
Sexually Dimorphic ◽  
High Water Mark ◽  
One New Species

The new talitrid amphipod genus Hermesorchestia is established for one new species from Australia, H. alastairi, common to the beaches of Tasmania. Hermesorchestia gen. nov. is typified by the sexually dimorphic males which have palmate lobes on the carpus and propodus of gnathopod 1, a three dimensional merus article on pereopod 7 and expanded posterior margin of pereopod 7 carpus. Other characters which define H. alastairi gen. et sp. nov. are the male pereopod 6 expanded merus and carpus, pereopod 7 basis posterior expansion, merus shape both medial and facial, carpus posterior expansion and the shape and setation of the telson. Hermesorchestia alastairi gen. et sp. nov. is a documented burrower (sand-hopper), living in sand dunes above the high water mark. 

scholarly journals Chaimowiczia: a new Iuiuniscinae genus from Brazil (Oniscidea, Synocheta, Styloniscidae) with the description of two new troglobitic species

2021 ◽  
Vol 39 ◽  
pp. 45-62
Author(s):  
Giovanna Monticelli Cardoso ◽  
Rafaela Bastos-Pereira ◽  
Leila Aparecida Souza ◽  
Rodrigo L. Ferreira
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
New Genus ◽  
Dorsal Surface ◽  
Minas Gerais ◽  
New Genus And Species ◽  
Antennal Lobes ◽  
Two New Species ◽  
Smooth Body

A new genus of Styloniscidae, Chaimowicziagen. nov., is described with two new species: Chaimowiczia tatussp. nov. from Gruta do Padre cave (Santana, Bahia) and Chaimowiczia uaisp. nov. from Lapa d’água do Zezé cave (Itacarambi, Minas Gerais). The new genus and species were allocated into the subfamily Iuiuniscinae, hitherto monotypic, by the pronounced rectangular-shaped lateral pereonites epimera, dorsal surface smooth, body outline continuous without a gap between pereon and pleon, and pleonites 3 to 5 developed forming tips. The two species of Chaimowiczia gen. nov. differ in the shape of cephalon antennal lobes, pereonite 1 epimera, pleonite 5 posterior margin and uropod exopod and endopod proportion.

A new cestode, Neoskrjabinolepis gvosdevi (Cyclophyllidea: Hymenolepididae) from the shrew Sorex tundrensis Merriam, 1900, in Kazakhstan

2010 ◽  
Vol 19 (1) ◽  
pp. 13-17
Author(s):  
S.A. Kornienko ◽  
V.D. Gulyaev ◽  
N.T. Erzhanov
Keyword(s):  
New Species ◽  
Middle Part ◽  
Basal Part ◽  
Fine Needle ◽  
Different Types

A cestode, Neoskrjabinolepis (Neoskrjabinolepidoides) gvosdevi sp. nov., is described from the tundra shrew Sorex tundrensis Merriam, 1900 in Kazakhstan. The new species has ten rostellar hooks, 0.40-0.43 mm long, with claw-liked blade with crooked middle part. It can be distinguished from other species in the subgenus by the cylindrical cirrus short, 0.45-0.50 mm long, and armed with different types of spines; the basal part covered with numerous small, rosethornshaped spines, and the middle and distal parts armed with fine, needle-shaped spines.

Taxonomy of Neomuscina Townsend (Diptera, Muscidae) from Brazil

Zootaxa ◽  
2012 ◽  
Vol 3504 (1) ◽  
pp. 1 ◽  
Author(s):  
ALESSANDRE PEREIRA-COLAVITE ◽  
CLAUDIO J. B. DE CARVALHO
Keyword(s):  
New Species ◽  
Species Distributions ◽  
Morphological Characters ◽  
Minas Gerais ◽  
Identification Key ◽  
Male And Female ◽  
Number Of Species ◽  
Three New Species ◽  
New Distribution

Neomuscina Townsend includes 41 species distributed throughout the Nearctic and Neotropical Regions. Although the genus has a large number of species, it has been ignored and its taxonomy is confusing and has many flaws. In this work we analyzed the following species recorded for Brazil: Neomuscina atincta Snyder, N. atincticosta Snyder, N. capalta Snyder, N. currani Snyder, N. douradensis Lopes & Khouri, N. goianensis Lopes & Khouri, N. inflexa (Stein), N. instabilis Snyder, N. mediana Snyder, N. mimosa Lopes & Khouri, N. neosimilis Snyder, N. nigricosta Snyder, N. paramediana Lopes & Khouri, N. pictipennis pictipennis (Bigot), N. ponti Lopes & Khouri, N. sanespra Snyder, N. schadei Snyder, N. similata Snyder, N. stabilis (Stein), N. transporta Snyder, N. vitoriae Lopes & Khouri and N. zosteris (Shannon & Del Ponte). Neomuscina nigricosta and N. transporta are new distribution records for Brazil. Three new species are described: Neomuscina anajeensis sp. nov. from Anagé (Bahia), Neomuscina maculata sp. nov. from Botelhos (Minas Gerais) and Neomuscina snyderi sp. nov. from Mata de São João (Bahia). An identification key based on the morphological characters of both male and female is provided. Species distributions are discussed and updated, and the number of species now recorded for Brazil is 29.

PU composites based on different types of textile fibers

2021 ◽  
pp. 002199832110316
Author(s):  
Nuno Gama ◽  
B Godinho ◽  
Ana Barros-Timmons ◽  
Artur Ferreira
Keyword(s):  
Thermal Conductivity ◽  
Raw Materials ◽  
Natural Fibers ◽  
Tensile Modulus ◽  
High Water ◽  
Textile Fibers ◽  
Synthetic Fibers ◽  
Hydrophilic Nature ◽  
Different Types ◽  
Recycled Composites

In this study polyurethane (PU) residues were mixed with residues of textile fibers (cotton, wool and synthetic fibers up to 70 wt/wt) to produce 100% recycled composites. In addition, the effect of the type of fiber on the performance of the ensuing composites was evaluated. The presence of fibers showed similar effect on the density, reducing the density in the 5.5-9.0% range. In a similar manner, the addition of fillers decreased their thermal conductivity. The 70 wt/wt wool composite presented 38.1% lower thermal conductivity when compared to the neat matrix, a reduction that was similar for the other type of fibers. Moreover, the presence of fillers yields stiffer materials, especially in the case of the Wool based composites, which with 70 wt/wt of filler content increased the tensile modulus of the ensuing material 3.4 times. This was attributed to the aspect ratio and stiffness of this type of fiber. Finally, the high-water absorption and lower thermal stability observed, especially in the case of the natural fibers, was associated with the hydrophilic nature of fibers and porosity of composites. Overall, the results suggest that these textile-based composites are suitable for construction and automotive applications, with the advantage of being produced from 100% recycled raw-materials, without compromised performance.

scholarly journals A new species of leaffish Polycentrus Müller & Troschel, 1849 (Percomorpha: Polycentridae) from the rio Negro, Brazil

2014 ◽  
Vol 12 (4) ◽  
pp. 747-753 ◽  
Author(s):  
Daniel Pires Coutinho ◽  
Wolmar Benjamin Wosiacki
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Lower Edge ◽  
Posterior Edge ◽  
Pectoral Fin ◽  
Dorsal Fin ◽  
Rio Negro ◽  
Ventral Edge ◽  
A New Species

A new species of Polycentrusis described from the rio Negro, in Brazil. It is distinguished from P. schomburgkii by the presence of two dark postocular and one subocular band, all smaller than orbital diameter, blunt snout, isognathous mouth, reduction of the serrations on the lower edge of the lacrimal-spines ranging from zero to two tiny spines at the posterior end, intensely serrated edge of the interopercle, fully serrated posterior edge of the vertical arm of the preopercle, presence of five pungent opercular spines, subopercle broadly serrated along most of its posterior ventral edge, presence of serrations dorsally on the posterior margin of the cleithrum, fourth ray of pectoral fin reaching the vertical through the anal-fin origin, 19-21 predorsal scales, 19-20 scales on dorsal-fin base, 12-14 scales on anal-fin base, and absence of a median opercular blotch.

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