A diverse assemblage of Permian echinoids (Echinodermata, Echinoidea) and implications for character evolution in early crown group echinoids

AbstractThe Permian is regarded as one of the most crucial intervals during echinoid evolution because crown group echinoids are first widely known from the Permian. New faunas provide important information regarding the diversity of echinoids during this significant interval as well as the morphological characterization of the earliest crown group and latest stem group echinoids. A new fauna from the Capitanian Lamar Member of the Bell Canyon Formation in the Guadalupe Mountains of West Texas comprises at least three new taxa, includingEotiaris guadalupensisThompson n. sp. an indeterminate archaeocidarid, andPronechinus? sp. All specimens represented are silicified and known from disarticulated or semiarticulated interambulacral and ambulacral plates and spines. This assemblage is one of the most diverse echinoid assemblages known from the Permian and, as such, informs the paleoecological setting in which the earliest crown group echinoids lived. This new fauna indicates that crown group echinoids occupied the same environments as stem group echinoids of the Archaeocidaridae and Proterocidaridae. Furthermore, the echinoids described herein begin to elucidate the order of character transitions that likely took place between stem group and crown group echinoids. At least one of the morphological innovations once thought to be characteristic of early crown group echinoids, crenulate tubercles, was in fact widespread in a number of stem group taxa from the Permian as well. Crenulate tubercles are reported from two taxa, and putative cidaroid style U-shaped teeth are present in the fauna. The presence of crenulate tubercles in the archaeocidarid indicates that crenulate tubercles were present in stem group echinoids, and thus the evolution of this character likely preceded the evolution of many of the synapomorphies that define the echinoid crown group.

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Phylogenetic and morphological characterization of Byssosphaeria macarangae sp. nov., and B. taiwanense sp. nov. from Macaranga tanarius

Phytotaxa ◽

10.11646/phytotaxa.364.3.1 ◽

2018 ◽

Vol 364 (3) ◽

pp. 211 ◽

Cited By ~ 2

Author(s):

DANUSHKA SANDARUWAN TENNAKOON ◽

RAJESH JEEWON ◽

CHANG HSIN KUO ◽

KEVIN DAVID HYDE

Keyword(s):

New Species ◽

Dna Sequence ◽

New Taxa ◽

Sequence Data ◽

Morphological Characterization ◽

Sequence Analyses ◽

Morphological Examination ◽

Dna Sequence Data ◽

Macaranga Tanarius

Byssosphaeria species were collected from Macaranga tanarius (Euphorbiaceae) in Shihnong forest area in Chiayi, Taiwan and subjected to morphological examination and DNA sequence analyses. Two new taxa, Byssosphaeria macarangae sp. nov and B. taiwanense sp. nov are herein described. Both species can be distinguished from other Byssosphaeria species based on distinct size differences in asci, ascospores and DNA sequence data. Detailed descriptions, micrographs and phylogenetic data of the new species are provided.

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Morphological Characterization of Mycobacteriophage R1

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100051281 ◽

1974 ◽

Vol 32 ◽

pp. 254-255

Author(s):

B. L. Soloff ◽

T. A. Rado

Keyword(s):

Carbon Source ◽

Stationary Phase ◽

Growth Phase ◽

Minimal Medium ◽

Morphological Characterization ◽

Logarithmic Growth Phase ◽

Complete Lysis ◽

Lysogenic Culture ◽

Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

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Morphological Characterization of Rhinacanthus Species of Sri Lanka

Planta Medica ◽

10.1055/s-0030-1251769 ◽

2010 ◽

Vol 76 (05) ◽

Author(s):

APPR Amarasinghe ◽

RP Karunagoda ◽

DSA Wijesundara

Keyword(s):

Sri Lanka ◽

Morphological Characterization

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Density and morphological characterization of bacteria in integrated and exclusive production systems

Scientific Electronic Archives ◽

10.36560/13920201194 ◽

2020 ◽

Vol 13 (11) ◽

pp. 1

Author(s):

A. R. B. Zanco ◽

A. Ferreira ◽

G. C. M. Berber ◽

E. N. Gonzaga ◽

D. C. C. Sabino

Keyword(s):

Bacterial Community ◽

Rainy Season ◽

Production Systems ◽

Cropping System ◽

Morphological Characterization ◽

Native Forest ◽

Exclusive Production ◽

Colony Forming Units

The different integrated production systems can directly interfere with its bacterial community. The present study aimed to assess density, bacterial diversity and the influence of dry and rainy season in different integrated and an exclusive production system. The fallow and a native forest area was assessed to. Samples were collected in 2012 March and September. The isolation were carried out into Petri dishes containing DYGS medium. The number of colony forming units (CFU) was counted after 48 hours and. The bacterial density ranged between 106 and 107 CFU g-1 soil. The crop system affected the dynamics of the bacterial community only in the rainy season. The rainy season showed greater density of total bacteria when compared to the dry period regardless of the cropping system. The dendrograms with 80 % similarity showed thirteen and fourteen groups in the rainy and dry seasons. Isolates with the capacity to solubilize phosphate in vitro were obtained from all areas in the two seasons, but this feature has been prevalent in bacteria isolated during the rainy season

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Characterization of Antibacterial-Producing Endophytic Fungi of Syzygiumpolyanthum Leaves

Infectious Disorders - Drug Targets ◽

10.2174/1871526519666181226123541 ◽

2020 ◽

Vol 20 (4) ◽

pp. 448-454

Author(s):

Rahmita Burhamzah ◽

Gemini Alam ◽

Herlina Rante

Keyword(s):

Molecular Characterization ◽

Endophytic Fungi ◽

Morphological Characterization ◽

Test Method ◽

Analysis Method ◽

Nitrogen Base ◽

Rdna Genes ◽

Antibacterial Screening ◽

Planting Method

Background: Endophytic fungi live in plants’ tissue and can produce the same bioactive compounds as its host plant produces. Syzygiumpolyanthum leaves have known to be one of the antibacterial compound producers. Aim and Objective: This study aimed to characterize morphologically, microscopically, and molecularly the antibacterial-producing endophytic fungi of Syzygiumpolyanthum leaves. Methods: The isolation of endophytic fungi was done by fragment planting method on PDA medium. The antibacterial screening was performed using the antagonistic test as the first screening followed by the disc diffusion test method. The morphological characterization was based on isolate’s mycelia color, growth pattern, margin, and surface texture of the colony, while the microscopic characterization was based on its hyphae characteristics. The molecular characterization of the isolate was done by nitrogen base sequence analysis method on nucleotide constituent of ITS rDNA genes of the isolate. Results: The results found that isolate DF1 has antibacterial activity against E.coli, S.aureus, P.acne, and P.aeruginosa, with the greatest inhibition at 10% concentration of broth fermentation extract on S.aureus with a diameter of inhibition of 13.77 mm. Conclusion: Based on macroscopic, microscopic, and molecular characterization, DF1 isolate is similar to Ceriporialacerate.

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GEOPHYSICAL CHARACTERIZATION OF GYPSUM KARST GEOHAZARDS IN THE DELAWARE BASIN, WEST TEXAS

10.1130/abs/2019am-331966 ◽

2019 ◽

Author(s):

Kevin W. Stafford ◽

◽

Wesley Brown

Keyword(s):

Gypsum Karst ◽

Delaware Basin ◽

West Texas ◽

Geophysical Characterization

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Microscopic Image Segmentation and Morphological Characterization of Novel Chitosan/Silica Nanoparticle/Nisin Films Using Antimicrobial Technique for Blueberry Preservation

Membranes ◽

10.3390/membranes11050303 ◽

2021 ◽

Vol 11 (5) ◽

pp. 303

Author(s):

Rokayya Sami ◽

Schahrazad Soltane ◽

Mahmoud Helal

Keyword(s):

Ph Value ◽

Silica Nanoparticle ◽

Morphological Characterization ◽

Aerobic Bacteria ◽

Nano Materials ◽

Elongation At Break ◽

Stable Suspension ◽

Average Size ◽

Material Ductility

In the current work, the characterization of novel chitosan/silica nanoparticle/nisin films with the addition of nisin as an antimicrobial technique for blueberry preservation during storage is investigated. Chitosan/Silica Nanoparticle/N (CH-SN-N) films presented a stable suspension as the surface loads (45.9 mV) and the distribution was considered broad (0.62). The result shows that the pH value was increased gradually with the addition of nisin to 4.12, while the turbidity was the highest at 0.39. The content of the insoluble matter and contact angle were the highest for the Chitosan/Silica Nanoparticle (CH-SN) film at 5.68%. The use of nano-materials in chitosan films decreased the material ductility, reduced the tensile strength and elongation-at-break of the membrane. The coated blueberries with Chitosan/Silica Nanoparticle/N films reported the lowest microbial contamination counts at 2.82 log CFU/g followed by Chitosan/Silica Nanoparticle at 3.73 and 3.58 log CFU/g for the aerobic bacteria, molds, and yeasts population, respectively. It was observed that (CH) film extracted 94 regions with an average size of 449.10, at the same time (CH-SN) film extracted 169 regions with an average size of 130.53. The (CH-SN-N) film presented the best result at 5.19%. It could be observed that the size of the total region of the fruit for the (CH) case was the smallest (1663 pixels), which implied that the fruit lost moisture content. As a conclusion, (CH-SN-N) film is recommended for blueberry preservation to prolong the shelf-life during storage.

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