scholarly journals Description of the family Padaungiellidae and morphological variability of Padaungiella lageniformis (Amoebozoides: Arcellinida) from the Vlasina Lake area, Serbia

2015 ◽  
Vol 67 (4) ◽  
pp. 1331-1337
Author(s):  
Stefan Luketa
Keyword(s):  
Morphological Variability ◽  
Testate Amoebae ◽  
Common Species ◽  
Lake Area ◽  
Qualitative And Quantitative ◽  
New Family ◽  
Quantitative Characters ◽  
Coefficients Of Variation ◽  
The Family ◽  
Aberrant Form

Based on theoretical conclusions, a new family of testate amoebae, Padaungiellidae, is described. It includes three genera: Alocodera, Apodera and Padaungiella. The most striking characteristic of the members of this family is an elongated neck, and absence of sets of teeth and septa along the oral-aboral axis on the inner side of the neck. The most common species of this family is Padaungiella lageniformis. Morphometrically, this species is not analyzed yet, so the qualitative and quantitative characters of a sphagnicolous population of P. lageniformis from the Vlasina Lake area (Serbia) are reported here. Quantitative characters were analyzed by univariate statistical methods. Coefficients of variation were moderately low for all the measured characters (range from 4.37 to 10.71%). Frequency distribution of only seven of sixteen variables showed approximately zero level of kurtosis, which indicated that specimens with average measurements were not predominant in the studied population. This paper provides evidence of the presence of an aberrant form of P. lageniformis.

scholarly journals Phenotypic and Genetic Study on Native Pigeonpea Germplasm of Chhattisgarh for Yield Attributing Traits

2021 ◽  
pp. 201-212
Author(s):  
Vipin Kumar Pandey ◽  
M. K. Singh ◽  
Prakriti Meshram ◽  
Vishal Kumar Gupta ◽  
Namita Singh ◽  
...  
Keyword(s):  
Seed Protein ◽  
Pigeon Pea ◽  
Morphological Characters ◽  
Flowering Plant ◽  
P Value ◽  
College Of Agriculture ◽  
Qualitative And Quantitative ◽  
Quantitative Characters ◽  
Coefficients Of Variation ◽  
The Mean

Aims: To find out genetic variation of pigeon pea Germplasms population on Chhattisgarh, with H. armigera, M. vitrata Larvae Population. Study Design: Augmented RBD Design in 4 block with 3 check varieties. Place and Duration of Study: College of Agriculture Raipur, IGKVV, Chhattisgarh. During Kharif 2019-2020. Methodology: The experimental materials were used 100 local landraces of Pigeonpea and three popular standard checks. The Morphological observations on various agro-morphological characters including qualitative and quantitative characters and Incidence of major insects of Pigeonpea were recorded. Results: outcome of the study reviled that Incidence of major insect of Pigeonpea 10 genotypes of pigeonpea are resistant and 10 are susceptible occurred. Analysis of variance indicated that the mean sum of squares due to genotypes were highly significant for all the characters with p-value of 0.001 and some traits check varieties 0.001. Results of genetic variability analysis state that’s highest genetic advance as percent of the mean for traits are days to fifty percent flowering, plant height, seed protein content, and days to maturity. Conclusion: The Pigeonpea accession used in the study revealed significant variability for most of the morphological traits. Amongst the genotypes studied, high coefficients of variation were observed for most of the characters studied indicating the existence of sufficient variability.

Untangling the Echiniscus Gordian knot: Stellariscus gen. nov. (Heterotardigrada : Echiniscidae) from Far East Asia

2018 ◽  
Vol 32 (5) ◽  
pp. 1234 ◽  
Author(s):  
Piotr Gąsiorek ◽  
Atsushi C. Suzuki ◽  
Reinhardt M. Kristensen ◽  
Dorota Lachowska-Cierlik ◽  
Łukasz Michalczyk
Keyword(s):  
Sexual Dimorphism ◽  
Quantitative Traits ◽  
New Genus ◽  
Morphological Variability ◽  
Far East ◽  
Dorsal Plate ◽  
Taxonomic Significance ◽  
Qualitative And Quantitative ◽  
The Family ◽  
Terrestrial Habitats

Species constituting the family Echiniscidae are highly derived, armoured and inhabit terrestrial habitats, in contrast to other heterotardigrades that are predominantly marine. The genus Echiniscus C.A.S. Schultze, 1840, nominal for the family Echiniscidae, is currently the most speciose tardigrade genus. However, the great morphological variability, in comparison with other heterotardigrade genera, suggests the polyphyletic character of the genus. Here, we analyse new specimens of Echiniscus pseudelegans Séméria, 1994 collected in Japan and conclude that the species as well as two other related taxa, E. elegans Richters, 1907 and E. latifasciatus Dudichev and Biserov, 2000, represent a new genus, Stellariscus, gen. nov. The new genus is characterised by a mixture of peculiar morphological apomorphies: black eyes, star-like dorsal plate sculpturing, no trunk appendages (only cephalic cirri present), two types of ventral plates, and striking sexual dimorphism in both qualitative and quantitative traits. Morphological phylogeny of the family Echiniscidae suggests a close affinity between Stellariscus, Hypechiniscus Thulin, 1928 and Pseudechiniscus Thulin, 1911. The polyphyletic status of both Echiniscus and Testechiniscus Kristensen, 1987 is also inferred. The taxonomic significance of ventral armature in echiniscid phylogeny and taxonomy is discussed.

scholarly journals Micromorphological Studies of the Genus Ipomoea L. (Convolvulaceae) in Nepal

2017 ◽  
Vol 5 (1) ◽  
pp. 16-23
Author(s):  
Saugat Shrestha ◽  
Nawal Shrestha ◽  
Sangeeta Rajbhandary
Keyword(s):  
Pollen Grains ◽  
Morphological Characters ◽  
Stomatal Frequency ◽  
Qualitative And Quantitative ◽  
Quantitative Characters ◽  
Pollen Characters ◽  
The Family ◽  
Ecological Implications ◽  
Structural Differences ◽  
The Tropics

Ipomoea is a large and complex genus, which comprises the largest number of species within the family Convolvulaceae. Globally, the genus consists of about 600 species of vines and shrubs, which are widely distributed throughout the tropics and the subtropics. In Nepal, the genus comprises 15 species, which are distributed throughout the tropical, subtropical and temperate region of the country. Besides few enumerations and floristic surveys, no comprehensive anatomy and pollen characters of 16 species of Ipomoea occurring in Nepal to evaluate the qualitative and quantitative differences in these characters. We found that the all species of Ipomoea have paracytic type stomata. However, there is considerable variation in the size and frequency of the stomata. The size and shape of the epidermal cells also varies from species to species. Ipomoea nil has the highest stomatal frequency, while I. purpurea has the lowest frequency. All species of Ipomoea have globose, isopolar, echinate, pentoporate and radially symmetrical pollen grains. I. quamoclit has the largest pollen, while I. aquatica has the smallest pollen. The anatomy of stem shows no distinct structural differences among species. Although no qualitative differences in the studied characters are found among species, there is considerable variation in the quantitative characters, such as the size of stomata, frequency of stomata and pollen size. These characters could have important taxonomic and ecological implications and therefore, are as valuable as the morphological characters.

QUALITATIVE AND QUANTITATIVE PHYTOCHEMICAL SCREENING AND IN VITRO ANTIOXIDANT EVALUATION OF PERGULARIA DAEMIA

2018 ◽  
Vol 24 (2) ◽  
Author(s):  
GITA MISHRA ◽  
HEMESHWER KUMAR CHANDRA ◽  
NISHA SAHU ◽  
SATENDRA KUMAR NIRALA ◽  
MONIKA BHADAURIA
Keyword(s):  
Reducing Sugars ◽  
Antioxidant Properties ◽  
Phytochemical Analysis ◽  
Phytochemical Screening ◽  
Qualitative And Quantitative ◽  
The Family ◽  
Ethanolic Extracts ◽  
Antioxidant Evaluation ◽  
In Vitro Antioxidant Activity

Pergularia daemia belongs to the family Asclepiadaceae, known to have anticancer, anti-inflammatory activity. Aim of the present study was to evaluate qualitative and quantitative phytochemical and antioxidant properties of ethanolic extracts of leaf, stem and root parts of P. daemia . Preliminary phytochemical analysis and in vitro antioxidant properties were evaluated by standard methods. The qualitative phytochemical analysis of P. daemia showed presence of flavonoids, tannins, alkaloid, phytosterol, carbohydrate, phenol, saponin, glycosides, terpenoids, steroids proteins and reducing sugars. Quantitative analysis showed polyphenol, flavonoid, flavonone, flavone and flavonol in P. daemia leaves, stem and root in considerable quantity. The in vitro antioxidant activity of P. daemia clearly demonstrated that leaf, stem and root parts have prominent antioxidant properties and was effective in scavenging free radicals.

Three new species, two new genera, and new family Biphragmosagittidae (Сhaetognatha) from Southwest Pacific Ocean

2011 ◽  
Vol 20 (1) ◽  
pp. 161-173
Author(s):  
A.P. Kassatkina
Keyword(s):  
New Species ◽  
Type Species ◽  
Morphological Characters ◽  
The Body ◽  
New Order ◽  
New Genera ◽  
New Family ◽  
The Family ◽  
Three New Species

Resuming published and own data, a revision of classification of Chaetognatha is presented. The family Sagittidae Claus & Grobben, 1905 is given a rank of subclass, Sagittiones, characterised, in particular, by the presence of two pairs of sac-like gelatinous structures or two pairs of fins. Besides the order Aphragmophora Tokioka, 1965, it contains the new order Biphragmosagittiformes ord. nov., which is a unique group of Chaetognatha with an unusual combination of morphological characters: the transverse muscles present in both the trunk and the tail sections of the body; the seminal vesicles simple, without internal complex compartments; the presence of two pairs of lateral fins. The only family assigned to the new order, Biphragmosagittidae fam. nov., contains two genera. Diagnoses of the two new genera, Biphragmosagitta gen. nov. (type species B. tarasovi sp. nov. and B. angusticephala sp. nov.) and Biphragmofastigata gen. nov. (type species B. fastigata sp. nov.), detailed descriptions and pictures of the three new species are presented.

Correcting a 135-year error: Limulidae Leach, 1819 (Chelicerata, Xiphosura) is the proper authority, not Limulidae Zittel, 1885

2021 ◽  
pp. 1-2
Author(s):  
Philip M. Novack-Gottshall ◽  
Roy E. Plotnick
Keyword(s):  
Horseshoe Crab ◽  
Marine Species ◽  
Limulus Polyphemus ◽  
Junior Synonym ◽  
Living Fossil ◽  
New Family ◽  
The Family ◽  
The World ◽  
Modern Genus

The horseshoe crab Limulus polyphemus (Linnaeus, 1758) is a famous species, renowned as a ‘living fossil’ (Owen, 1873; Barthel, 1974; Kin and Błażejowski, 2014) for its apparently little-changed morphology for many millions of years. The genus Limulus Müller, 1785 was used by Leach (1819, p. 536) as the basis of a new family Limulidae and synonymized it with Polyphemus Lamarck, 1801 (Lamarck's proposed but later unaccepted replacement for Limulus, as discussed by Van der Hoeven, 1838, p. 8) and Xyphotheca Gronovius, 1764 (later changed to Xiphosura Gronovius, 1764, another junior synonym of Limulus). He also included the valid modern genus Tachypleus Leach, 1819 in the family. The primary authority of Leach (1819) is widely recognized in the neontological literature (e.g., Dunlop et al., 2012; Smith et al., 2017). It is also the authority recognized in the World Register of Marine Species (WoRMS Editorial Board, 2021).

Early Paleozoic Hyolitha from North America: reexamination of Walcott's and Resser's type specimens

1988 ◽  
Vol 62 (2) ◽  
pp. 218-233 ◽  
Author(s):  
John Mark Malinky
Keyword(s):  
North America ◽  
Lower Cambrian ◽  
Type Species ◽  
New Genus ◽  
Early Paleozoic ◽  
Type Specimens ◽  
Middle Cambrian ◽  
Upper Cambrian ◽  
New Family ◽  
The Family

Concepts of the family Hyolithidae Nicholson fide Fisher and the genera Hyolithes Eichwald and Orthotheca Novak have been expanded through time to encompass a variety of morphologically dissimilar shells. The Hyolithidae is here considered to include only those hyolithid species which have a rounded (convex) dorsum; slopes on the dorsum are inflated, and the venter may be flat or slightly inflated. Hyolithes encompasses species which possess a low dorsum and a prominent longitudinal sulcus along each edge of the dorsum; the ligula is short and the apertural rim is flared. The emended concept of Orthotheca includes only those species of orthothecid hyoliths which have a subtriangular transverse outline and longitudinal lirae covering the shell on both dorsum and venter.Eighteen species of Hyolithes and one species of Orthotheca from the Appalachian region and Western Interior were reexamined in light of more modern taxonomic concepts and standards of quality for type material. Reexamination of type specimens of H. similis Walcott from the Lower Cambrian of Newfoundland, H. whitei Resser from the Lower Cambrian of Nevada, H. billingsi Walcott from the Lower Cambrian of Nevada, H. gallatinensis Resser from the Upper Cambrian of Wyoming, and H. partitus Resser from the Middle Cambrian of Alabama indicates that none of these species represents Hyolithes. Hyolithes similis is here included under the new genus Similotheca, in the new family Similothecidae. Hyolithes whitei is designated as the type species of the new genus Nevadotheca, to which H. billingsi may also belong. Hyolithes gallatinensis is referred to Burithes Missarzhevsky with question, and H. partitus may represent Joachimilites Marek. The type or types of H. attenuatus Walcott, H. cecrops Walcott, H. comptus Howell, H. cowanensis Resser, H. curticei Resser, H. idahoensis Resser, H. prolixus Resser, H. resseri Howell, H. shaleri Walcott, H. terranovicus Walcott, and H. wanneri Resser and Howell lack shells and/or other taxonomically important features such as a complete aperture, rendering the diagnoses of these species incomplete. Their names should only be used for the type specimens until better preserved topotypes become available for study. Morphology of the types of H.? corrugatus Walcott and “Orthotheca” sola Resser does not support placement in the Hyolitha; the affinities of these species are uncertain.

scholarly journals Amino acid residues modulating the activities of staphylococcal glutamyl endopeptidases

2010 ◽  
Vol 391 (10) ◽  
Author(s):  
Toshio Ono ◽  
Yuko Ohara-Nemoto ◽  
Yu Shimoyama ◽  
Hisami Okawara ◽  
Takeshi Kobayakawa ◽  
...  
Keyword(s):  
Family Members ◽  
Glutamyl Endopeptidase ◽  
Peptidase Activity ◽  
Amino Acid Residues ◽  
Virulence Determinants ◽  
Cloning And Sequencing ◽  
New Family ◽  
The Family ◽  
N Terminus ◽  
Staphylococcus Epidermis

AbstractThe glutamyl endopeptidase family of enzymes from staphylococci has been shown to be important virulence determinants of pathogenic family members, such asStaphylococcus aureus. Previous studies have identified the N-terminus and residues from positions 185–195 as potentially important regions that determine the activity of three members of the family. Cloning and sequencing of the new family members fromStaphylococcus caprae(GluScpr) andStaphylococcus cohnii(GluScoh) revealed that the N-terminal Val residue is maintained in all family members. Mutants of the GluV8 enzyme fromS. aureuswith altered N-terminal residues, including amino acids with similar properties, were inactive, indicating that the Val residue is specifically required at the N-terminus of this enzyme family in order for them to function correctly. Recombinant GluScpr was found to have peptidase activity intermediate between GluV8 and GluSE fromStaphylococcus epidermisand to be somewhat less specific in its substrate requirements than other family members. The 185–195 region was found to contribute to the activity of GluScpr, although other regions of the enzyme must also play a role in defining the activity. Our results strongly indicate the importance of the N-terminal and the 185–195 region in the activity of the glutamyl endopeptidases of staphylococci.

Palaeonema phyticum gen. n., sp. n. (Nematoda: Palaeonematidae fam. n.), a Devonian nematode associated with early land plants

Nematology ◽  
2008 ◽  
Vol 10 (1) ◽  
pp. 9-14 ◽  
Author(s):  
George Poinar Jr ◽  
Hans Kerp ◽  
Hagen Hass
Keyword(s):  
Early Stage ◽  
Land Plant ◽  
Terrestrial Plants ◽  
Early Devonian ◽  
Plant Parasitism ◽  
New Family ◽  
The Earth ◽  
The Family ◽  
The Face ◽  
Early Land

AbstractNematodes are one of the most abundant groups of invertebrates on the face of the earth. Their extremely poor fossil record hinders our ability to assess just when members of this group invaded land and first became associated with plants. This study reports fossil nematodes from the stomatal chambers of the Early Devonian (396 mya) land plant, Aglaophyton major. These nematodes, which are tentatively assigned to the order Enoplia, are described as Palaeonema phyticum gen. n., sp. n. in the new family Palaeonematidae fam. n. Diagnostic characters of the family are: i) cuticular striations; ii) uniform, cylindrical pharynx with the terminal portion only slightly set off from the remainder; and iii) a two-portioned buccal cavity with the upper portion bearing protuberances. The presence of eggs, juveniles and adults in family clusters within the plant tissues provide the earliest evidence of an association between terrestrial plants and animals and may represent an early stage in the evolution of plant parasitism by nematodes.

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