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https://www.readbyqxmd.com/read/28438699/cryptic-diversity-in-amazonian-frogs-integrative-taxonomy-of-the-genus-anomaloglossus-amphibia-anura-aromobatidae-reveals-a-unique-case-of-diversification-within-the-guiana-shield
#1
Jean-Pierre Vacher, Philippe J R Kok, Miguel T Rodrigues, Jucivaldo Dias Lima, Andy Lorenzini, Quentin Martinez, Manon Fallet, Elodie A Courtois, Michel Blanc, Philippe Gaucher, Maël Dewynter, Rawien Jairam, Paul Ouboter, Christophe Thébaud, Antoine Fouquet
Lack of resolution on species boundaries and distribution can hamper inferences in many fields of biology, notably biogeography and conservation biology. This is particularly true in megadiverse and under-surveyed regions such as Amazonia, where species richness remains vastly underestimated. Recently, integrative approaches using a combination of phenotypic and molecular phylogenetics evidence have proved extremely successful in reducing knowledge gaps, especially in animal groups displaying high levels of cryptic diversity like amphibians...
April 21, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28432510/epilithic-diatom-assemblages-and-their-relationships-with-environmental-variables-in-the-nil%C3%A3-fer-stream-basin-bursa-turkey
#2
Didem Karacaoğlu, Nurhayat Dalkıran
Patterns of epilithic diatom species distribution in relation to environmental variables from 12 sampling sites on the main stream and some of its tributaries in the Nilüfer Stream Basin were determined using multivariate statistical techniques. The stream basin has been heavily influenced by anthropogenic effects. The upper part of the basin that is distant from pollution sources mostly has a spring water quality, while the lower part where the stream flows through the urban area and receives domestic and industrial wastewater has a quite low quality...
May 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28426400/morphological-description-of-cosmocerca-sp-nematoda-cosmocerdidae-from-the-mascarene-grass-frog-ptychadena-cf-mascareniensis-amphibia-ptychadenidae-a-light-and-scanning-electron-microscopic-studies
#3
Rewaida Abdel-Gaber, Fathy Abdel-Ghaffar, Reem Kamel, Sherein Maher, Nashwa El Deeb, Saleh Al Quraishy, Heinz Mehlhorn
The Mascarene grass frog Ptychadena cf. mascareniensis is a species of frog with a vast area of distribution in Africa. A total of 300 frog specimens were collected from different localities at El-Giza province, Egypt; then dissected and examined for the presence of parasitic infection. Only eighty six (28.66%) specimens were found to be naturally infected with nematode parasite. Seasonally, the prevalence of infection was reached its maximum value of 74.66% during summer and minimum values of 26.66% (20/75), 13...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28419728/temporal-changes-in-cutaneous-bacterial-communities-of-terrestrial-and-aquatic-phase-newts-amphibia
#4
Joana Sabino-Pinto, Pedro Galán, Silvia Rodríguez, Molly C Bletz, Sabin Bhuju, Robert Geffers, Michael Jarek, Miguel Vences
Animal-associated bacterial communities play essential roles for their host's ecology, physiology and health. Temporal dynamics of these communities are poorly understood, but might be of high relevance particularly for amphibians with a well-expressed biphasic biology of adults where the structure of their skin changes drastically between the aquatic and terrestrial phases. Here, we investigated the temporal dynamics of cutaneous bacterial communities of Lissotriton boscai and Triturus marmoratus by monthly sampling populations from a pond and surrounding terrestrial habitat near A Coruña, Spain...
April 17, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28412536/molecular-phylogenetics-and-dating-of-the-problematic-new-guinea-microhylid-frogs-amphibia-anura-reveals-elevated-speciation-rates-and-need-for-taxonomic-reclassification
#5
Julio A Rivera, Fred Kraus, Allen Allison, Marguerite A Butler
Asterophryinae is a large monophyletic subfamily of Anurans containing over 300 species distributed across one of the world's most geologically active areas - New Guinea and its satellite islands, Australia and the Philippines. The tremendous ecological and morphological diversity of this clade, with apparent specializations for burrowing, terrestrial, semi-aquatic, and arboreal lifestyle, suggests an evolutionary process of adaptive radiation. Despite this spectacular diversity, this and many other questions of evolutionary processes have received little formal study because until now the phylogeny of this spececies-rich clade has remained uncertain...
April 13, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28384420/not-good-but-not-all-bad-dehydration-effects-on-body-fluids-organ-masses-and-water-flux-through-the-skin-of-rhinella-schneideri-amphibia-bufonidae
#6
Rodolfo C O Anderson, Rafael P Bovo, Carlos E Eismann, Amauri A Menegario, Denis V Andrade
Because of their permeable skin, terrestrial amphibians are constantly challenged by the potential risk of dehydration. However, some of the physiological consequences associated with dehydration may affect aspects that are themselves relevant to the regulation of water balance. Accordingly, we examined the effects of graded levels of dehydration on the rates of evaporative water loss and water absorption through the skin in the terrestrial Neotropical toad, Rhinella schneideri. Concomitantly, we monitored the effects of dehydration on the mass of visceral organs; hematocrit and hemoglobin content; plasma osmolality; and plasma concentration of urea, sodium, chloride, and potassium...
May 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28369819/feeding-biomechanics-of-late-triassic-metoposaurids-amphibia-temnospondyli-a-3d-finite-element-analysis-approach
#7
Josep Fortuny, Jordi Marcé-Nogué, Dorota Konietzko-Meier
The Late Triassic freshwater ecosystems were occupied by different tetrapod groups including large-sized anamniotes, such as metoposaurids. Most members of this group of temnospondyls acquired gigantic sizes (up to 5 m long) with a nearly worldwide distribution. The paleoecology of metoposaurids is controversial; they have been historically considered passive, bottom-dwelling animals, waiting for prey on the bottom of rivers and lakes, or they have been suggested to be active mid-water feeders. The present study aims to expand upon the paleoecological interpretations of these animals using 3D finite element analyses (FEA)...
March 29, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28295311/molecular-phylogeny-and-taxonomic-revision-of-the-genus-wittrockiella-pithophoraceae-cladophorales-including-the-descriptions-of-w-australis-sp-nov-and-w-zosterae-sp-nov
#8
Christian Boedeker, Charles J O'Kelly, John A West, Takeaki Hanyuda, Adele Neale, Isamu Wakana, Mike D Wilcox, Ulf Karsten, Giuseppe C Zuccarello
Wittrockiella is a small genus of filamentous green algae that occurs in habitats with reduced or fluctuating salinities. Many aspects of the basic biology of these algae are still unknown and the phylogenetic relationships within the genus have not been fully explored. We provide a phylogeny based on three ribosomal markers (ITS, LSU and SSU rDNA) of the genus, including broad intraspecific sampling for W. lyallii and W. salina, recommendations for the use of existing names are made, and highlight aspects of their physiology and life cycle...
March 12, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28278693/dna-barcoding-revises-a-misidentification-on-mossy-frog-new-record-and-distribution-extension-of-theloderma-corticale-boulenger-1903-amphibia-anura-rhacophoridae
#9
Huayuan Huang, Zening Chen, Zhonghui Wei, Rongping Bu, Zhengjun Wu
As an endangered animal group, mossy frog (genus Theloderma) has attracted the attention of biologists and wildlife conservationists. Clarifying the taxonomic status and distribution of each species in Theloderma is important to determine the conservation status for each species, establish appropriate conservation strategies and probe the speciation process. Recently, we discovered a medium-sized species of mossy frog of the genus Theloderma in April 2015 during municipal surveys of amphibians in Dayao Mountain of Jinxiu...
February 16, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28273092/the-100th-an-appealing-new-species-of-dendropsophus-amphibia-anura-hylidae-from-northeastern-brazil
#10
Iuri Ribeiro Dias, Célio Fernando Baptista Haddad, Antônio Jorge Suzart Argôlo, Victor Goyannes Dill Orrico
We describe a new species of the Dendropsophus leucophyllatus Group from the Atlantic Forest of the southern region of State of Bahia, Brazil. It can be distinguished from all species of the D. leucophyllatus Group on the basis of morphological characters (especially its unique dorsal pattern and snout in dorsal view), advertisement calls and divergence in mitochondrial DNA gene sequences. The inclusion of D. anceps on the group remains controversial but our phylogenetic analyses do not recover the new species as sister to syntopic species of the D...
2017: PloS One
https://www.readbyqxmd.com/read/28228669/a-new-species-of-pristimantis-amphibia-anura-craugastoridae-from-a-montane-forest-of-the-pui-pui-protected-forest-in-central-peru-regi%C3%A3-n-jun%C3%A3-n
#11
Edgar Lehr, Jiří Moravec
A new species of frog of the genus Pristimantis is described from a montane forest between 1700 and 1800 m a.s.l. of the Pui Pui Protected Forest (Región Junín) in central Peru. Pristimantis ashaninkasp. n. is described based on five adult females (snout-vent length 23.1-26.7 mm) and ten juveniles (snout-vent length 10.6-13.4). It differs from its congeners by having the skin on dorsum shagreen with many conical tubercles giving it a spinose appearance, lacking a tympanum, having groin, anterior and posterior surfaces of thighs uniformly grayish brown, and a pale bronze iris with fine black reticulations, a median reddish hint horizontally across iris, and a black narrow vertical streak from pupil across lower and upper half of iris...
2017: ZooKeys
https://www.readbyqxmd.com/read/28183129/the-type-localities-of-i-anolis-i-i-aequatorialis-i-werner-1894-sauria-iguania-dactyloidae-and-i-pristimantis-i-i-appendiculatus-i-werner-1894-amphibia-anura-craugastoridae
#12
Diego F Cisneros-Heredia
The eminent Austrian zoologist Franz Werner described several new species of amphibians and reptiles from America, including Anolis aequatorialis Werner, 1894 and Hylodes appendiculatus Werner, 1894. Both species were described based on single specimens, with no more specific type localities than "Ecuador" (Werner 1894a,b). After its description, A. aequatorialis remained unreported until Peters (1967) and Fitch et al. (1976) published information on its distribution and natural history. Anolis aequatorialis is currently known to inhabit low montane and cloud forest on the western slopes of the Andes from extreme southern Colombia to central Ecuador, between 1300 and 2300 m elevation (Ayala-Varela & Velasco 2010; Ayala-Varela et al...
January 4, 2017: Zootaxa
https://www.readbyqxmd.com/read/28179071/the-bh4-domain-of-bcl-2-orthologues-from-different-classes-of-vertebrates-can-act-as-an-evolutionary-conserved-inhibitor-of-ip3-receptor-channels
#13
Hristina Ivanova, Tomas Luyten, Elke Decrock, Tim Vervliet, Luc Leybaert, Jan B Parys, Geert Bultynck
Ca(2+) signalling plays an important role in various physiological processes in vertebrates. In mammals, the highly conserved anti-apoptotic B-cell lymphoma-2 (Bcl-2) protein is an important modulator of the inositol 1,4,5-trisphosphate receptor (IP3R), i.e. the main intracellular Ca(2+) - release channel located at the endoplasmic reticulum (ER). The Bcl-2 Homology (BH) 4 domain of Bcl-2 (BH4-Bcl-2) is a critical determinant for inhibiting IP3Rs, by directly targeting a region in the modulatory domain of the receptor (domain 3)...
January 25, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28148215/historical-demography-of-an-endangered-salamander-ranodon-sibiricus-amphibia-urodela-hynobiidae-a-reassessment
#14
Kanto Nishikawa, Tatjana Dujsebayeva, Masafumi Matsui, Natsuhiko Yoshikawa, Atsushi Tominaga
Chinese populations of the endangered Siberian salamander Ranodon sibiricus are reported to have diverged only about 120 years ago, and to have the lowest genetic diversity of any amphibian. However, these conclusions require verification, as the main range of the species is in Kazakhstan. Moreover, the generation time used for estimating divergence time has a weak ground. In order to clarify these problems, we investigated the molecular phylogenetic relationship and historical demography of the species covering its whole distribution range using the mitochondrial DNA region reported for Chinese population (1072 bp sequences of the control region), while conducting skeletochronological analysis to estimate accurate generation time...
February 2017: Zoological Science
https://www.readbyqxmd.com/read/28145573/static-osteogenesis-does-not-precede-dynamic-osteogenesis-in-periosteal-ossification-of-pleurodeles-caudata-amphibia-and-pogona-squamata-lepidosauria
#15
Jorge Cubo, Mylaine Hui, François Clarac, Alexandra Quilhac
Two successive mechanisms have been described in perichondral ossification: (1) in static osteogenesis, mesenchymal cells differentiate into stationary osteoblasts oriented randomly, which differentiate into osteocytes in the same site; (2) in dynamic osteogenesis, mesenchymal cells differentiate into osteoblasts that are all oriented in the same direction and move back as they secrete collagen fibers. This study is aimed at testing the hypothesis that the ontogenetic sequence static then dynamic osteogenesis observed in the chicken and in the rabbit is homologous and was acquired by the last common ancestor of amniotes or at a more inclusive node...
February 1, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28145223/light-and-transmission-electron-microscopy-of-cepedea-longa-opalinidae-from-fejervarya-limnocharis
#16
Can Li, Xiao Jin, Ming Li, Guitang Wang, Hong Zou, Wenxiang Li, Shangong Wu
Cepedea longa Bezzenberger, 1904, collected from Fejervarya limnocharis (Amphibia, Anura, Ranidae) from Honghu Lake, Hubei Province, China in May-July 2016, is described at both light and transmission electron microscope levels. This is the first electron microscopic study of this species. Cepedea longa possesses a developed fibrillar skeletal system, composed of longitudinal fibrillar bands and transversal fibrils as well as numerous thin microfibrils dispersed in the endoplasm, which may play an important role in morphogenesis and offer some resilience to deformations of the cell...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28099011/montagnuphilones-a-g-azaphilones-from-montagnulaceae-sp-dm0194-a-fungal-endophyte-of-submerged-roots-of-persicaria-amphibia
#17
Jian-Guang Luo, Ya-Ming Xu, Dustin C Sandberg, A Elizabeth Arnold, A A Leslie Gunatilaka
Seven azaphilones, montagnuphilones A-G (1-7), together with previously known azaphilones 8-11, were encountered in Montagnulaceae sp. DM0194, an endophytic fungus isolated from submerged roots of Persicaria amphibia. The structures of 1-7 were elucidated on the basis of their MS and NMR spectroscopic analysis. Compounds 1-8 were evaluated for their cytotoxicity and ability to inhibit nitric oxide (NO) production in lipopolysaccharide-activated RAW264.7 macrophage cells. Among these, none were found to be cytotoxic to RAW264...
January 27, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28034659/toxins-and-pharmacologically-active-compounds-from-species-of-the-family-bufonidae-amphibia-anura
#18
REVIEW
Candelario Rodríguez, Louise Rollins-Smith, Roberto Ibáñez, Armando A Durant-Archibold, Marcelino Gutiérrez
ETHNOPHARMACOLOGICAL RELEVANCE: Among amphibians, 15 of the 47 species reported to be used in traditional medicines belong to the family Bufonidae, which demonstrates their potential in pharmacological and natural products research. For example, Asian and American tribes use the skin and the parotoid gland secretions of some common toads in the treatment of hemorrhages, bites and stings from venomous animals, skin and stomach disorders, as well as several types of cancers. OVERARCHING OBJECTIVE: In addition to reviewing the occurrence of chemical constituents present in the family Bufonidae, the cytotoxic and biomedical potential of the active compounds produced by different taxa are presented...
December 26, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28025499/patterns-of-apoptosis-and-proliferation-throughout-the-biennial-reproductive-cycle-of-viviparous-female-typhlonectes-compressicauda-amphibia-gymnophiona
#19
Michel Raquet, Claire Brun, Jean-Marie Exbrayat
Typhlonectes compressicauda is an aquatic gymnophionan amphibian living in South America. Its breeding cycle is linked to seasons, characterized by a regular alternation of rainy and dry seasons. During a complex biennial cycle, the female genital tract undergoes a series of alternations of increasing and decreasing, governed by equilibrium of proliferation and apoptotic phenomena. Immunohistochemical methods were used to visualize cell proliferation with the detection of Ki67 antibody, a protein present in proliferative cells; terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) and Apostain were performed to detect apoptotic cells on sections of ovaries and oviducts...
December 22, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28006797/redescription-and-range-extension-of-i-microhyla-i-i-sholigari-i-dutta-amp-ray-amphibia-anura-microhylidae-from-south-west-india
#20
Kadaba Shamanna Seshadri, H Priti, G Ravikanth, M K Vidisha, K K Vineeth, Ramit Singal, R R Sarma, N A Aravind, Kotambylu Vasudeva Gururaja
Microhyla sholigari is an endangered frog described in the year 2000. The original description was based on non-adult types and lacked information on several morphological characters, call structure, genetic material and photographs of the animal in life. The absence of such information posed challenges in field identification of this species. Since the original description, there is one other reported sighting of this species from Kerala in 2001. We encountered specimens that we confer to this species based on morphological similarity to the subadult holotype, from several new localities within and outside the Western Ghats of Karnataka...
December 21, 2016: Zootaxa
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