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Synthesis Of Some New Biheterocyclic Triazole Derivatives And Evaluation Of Their Antimicrobial Activity, Hakan Bektaş, Ahmet Demi̇rbaş, Nesli̇han Demi̇rbaş, Şengül Alpay Karaoğlu
Synthesis Of Some New Biheterocyclic Triazole Derivatives And Evaluation Of Their Antimicrobial Activity, Hakan Bektaş, Ahmet Demi̇rbaş, Nesli̇han Demi̇rbaş, Şengül Alpay Karaoğlu
Turkish Journal of Chemistry
2-{3-(4-Substitutedbenzyl)-4-[2-(1H-indol-3-yl)ethyl]-5-oxo-4,5- dihydro-1H-1,2,4-triazol-1-yl}-N'-(aryl-methylene)acetohydrazides (5a-g), 4-amino-2-{-(4-substitutedbenzyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol- 1-yl}-N'-(arylmethylene)acetohydrazides (6a,b), and 4-[2-(1H-indol- 3-yl)ethyl]-5-(4-substitutedbenzyl)-2-{5-(phenylamino)-1,3,4-thiadiazol- 2-yl]methyl}-2,4-dihydro-3H-1,2,4-triazol-3-ones (8a,b) were synthesized starting from 4-alkyl-5-(4-substitutedbenzyl)-2,4-dihydro- 3H-1,2,4-triazol-3-ones (2a-c) by several steps and their structures were well characterized by elemental analyses, IR, ^1H-NMR, ^{13}C-NMR, and mass spectral studies. They were also screened for their microbial activities. The obtained antimicrobial activity results revealed that 12 among the 24 compounds tested displayed variable growth inhibition effects on the tested gram-positive and gram-negative bacterial strains. None of the compounds showed antifungal activity against yeast-like fungi.
Chelating Agent Free Solid Phase Extraction (Caf-Spe) Method For Separation And/Or Preconcentration Of Iron(Iii) Ions, Özcan Yalçinkaya, Orhan Murat Kalfa, Ali̇ Rehber Türker
Chelating Agent Free Solid Phase Extraction (Caf-Spe) Method For Separation And/Or Preconcentration Of Iron(Iii) Ions, Özcan Yalçinkaya, Orhan Murat Kalfa, Ali̇ Rehber Türker
Turkish Journal of Chemistry
This paper presents a chelating agent free solid phase extraction (CAF-SPE) method for the separation and/or preconcentration of trace iron(III) ions. This method is based on the sorption of Fe(III) ions without using any chelating agent onto Amberlyst 36 resin. A good relative standard deviation (3%), high recovery (>95%), high enrichment factor (100), and low detection limit (0.32 \mu g L^{-1}) were obtained. The adsorption capacity of resin was 117 mg g^{-1} for iron(III). The method was applied for the determination of iron various in water and commercial tea bag samples. The accuracy of the method was confirmed by …
Sulfonic Acid-Functionalized Silica: A Remarkably Efficient Heterogeneous Reusable Catalyst For The One-Pot Synthesis Of 1,4-Dihydropyridines, Behzad Mohammadi, Sayyed Mohammad Hosseini Jamkarani, Taghi A. Kamali, Mahmoud Nasrollahzadeh, Ali Mohajeri
Sulfonic Acid-Functionalized Silica: A Remarkably Efficient Heterogeneous Reusable Catalyst For The One-Pot Synthesis Of 1,4-Dihydropyridines, Behzad Mohammadi, Sayyed Mohammad Hosseini Jamkarani, Taghi A. Kamali, Mahmoud Nasrollahzadeh, Ali Mohajeri
Turkish Journal of Chemistry
An efficient one-pot method for the synthesis of 1,4-dihydropyridines from \beta-dicarbonyl compounds, aldehyde, and ammonium acetate is reported using sulfonic acid-functionalized silica at 90 °C under solvent-free conditions with good to excellent yields. The catalyst is easily prepared, stable (up to 300 °C), reusable, and efficiently used under reaction conditions.
Synthesis And Surfactant Properties Of N-Acylation Compounds Derived From Hydrolysis Degradation Products Of N-(\Beta-Cianoethyl)-\Epsilon-Caprolactam, Andreea Bondarev
Synthesis And Surfactant Properties Of N-Acylation Compounds Derived From Hydrolysis Degradation Products Of N-(\Beta-Cianoethyl)-\Epsilon-Caprolactam, Andreea Bondarev
Turkish Journal of Chemistry
N-acyl amino acids can be used as active surface agents in the detergents industry, as well as in the pharmaceutical industry and cosmetics. Properties of these compounds are superior to those of fatty acids soaps and they are not toxic to the environment and have low Kraft points, because of peptide bonds (CO-NH). Acylation at the nitrogen atom can be performed with good yields without catalysts, for strong nucleophilic derivatives. The synthesis of some derivatives of 4-azasebacic acid, which are hydrolysis degradation products from N-(\beta -cianoethyl)-\epsilon -caprolactam, has been described and the N-acylation processes for these compounds are also presented. …
Impact Of Soil Drought Stress On Photochemical Efficiency Of Photosystem Ii And Antioxidant Enzyme Activities Of Phaseolus Vulgaris Cultivars, Rabi̇ye Terzi̇, Aykut Sağlam, Ni̇hal Kutlu, Hati̇ce Nar, Asim Kadioğlu
Impact Of Soil Drought Stress On Photochemical Efficiency Of Photosystem Ii And Antioxidant Enzyme Activities Of Phaseolus Vulgaris Cultivars, Rabi̇ye Terzi̇, Aykut Sağlam, Ni̇hal Kutlu, Hati̇ce Nar, Asim Kadioğlu
Turkish Journal of Botany
Common bean (Phaseolus vulgaris L.) cultivars (cvs) (Göynük 98, Karacaşehir 90, Şehirali 90, ES 855, and Yunus 90) were subjected to drought stress in order to assess the levels of drought tolerance through the analysis of growth parameters, leaf water potential (\psi_{leaf}), stomatal conductance (g_s), chlorophyll (chl) content, and lipid peroxidation. Significant differences were recorded among cultivars in most traits. Yunus 90 was identified as the most tolerant, and Karacaşehir 90 was the most sensitive. Furthermore, the changes in antioxidant enzyme activities, H_2O_2 content, and Photosystem II were investigated under drought stress, where Antioxidant enzyme activities increased while H_2O_2 contents …
Enhanced Adventitious Shoot Regeneration From Aerial Stem Explants Of Ginger Using Tdz And Its Histological Studies, Adinkudikuyyal Lincy, Bhaskaran Sasikumar
Enhanced Adventitious Shoot Regeneration From Aerial Stem Explants Of Ginger Using Tdz And Its Histological Studies, Adinkudikuyyal Lincy, Bhaskaran Sasikumar
Turkish Journal of Botany
A protocol for direct plantlet regeneration from aerial stem explants of ginger (Zingiber officinale Rosc.) has been developed. Adventitious shoots and roots were regenerated from in planta aerial stem explants of 2 ginger varieties viz. var. 'Jamaica' and var. 'Varada'. Maximum shoot and root regeneration were observed in the cultures containing TDZ and IBA (1:1; 1:0.1 mg L-1) in both varieties. Cultures containing TDZ alone showed poor shoot and root formation. Histological studies revealed that the shoot initials originated from the primary thickening meristem and apical meristem, while the root primordial originated from the primary thickening meristem present in the …
The Genotoxic Potential Of Two Heavy Metals In Inbred Lines Of Maize (Zea Mays L.), Girjesh Kumar, Prashant Kumar Rai
The Genotoxic Potential Of Two Heavy Metals In Inbred Lines Of Maize (Zea Mays L.), Girjesh Kumar, Prashant Kumar Rai
Turkish Journal of Botany
The genotoxic effects of 2 heavy metals (mercury chloride and cadmium chloride) on the gametic cells of 6 inbred lines of maize were tested in terms of cytological abnormalities. Meiosis was normal under control conditions. During the treatments with mercury and cadmium there was a concentration-dependent increase in meiotic abnormalities in all the inbred lines. A wide spectrum of chromosomal aberrations in the treated sets was stickiness, followed by laggards, bridges, scattering, precocious movement, fragments, etc. Maximum chromosomal anomalies were observed in inbred line CM-142 in both the treatment sets of heavy metals. Compared to CdCl_2, HgCl_2 induced more chromosomal …
A New Species Of Onosma (Boraginaceae) From Eastern Turkey, Ali̇ Kandemi̇r, Zafer Türkmen
A New Species Of Onosma (Boraginaceae) From Eastern Turkey, Ali̇ Kandemi̇r, Zafer Türkmen
Turkish Journal of Botany
Onosma beyazoglui Kandemir & Z. Türkmen sp. nov. (Boraginaceae) is described as a new species from the province of Erzincan in Turkey. Diagnostic morphological characters of this new species from the related species are discussed.
Nitrogen And Phosphorus Resorption In A Salt Marsh In Northern Turkey, Yasemi̇n Çakir, Tuğba Özbucak, Hamdi̇ Güray Kutbay, Dudu Duygu Kiliç, Ali̇ Bi̇lgi̇n, Rena Huseyinova
Nitrogen And Phosphorus Resorption In A Salt Marsh In Northern Turkey, Yasemi̇n Çakir, Tuğba Özbucak, Hamdi̇ Güray Kutbay, Dudu Duygu Kiliç, Ali̇ Bi̇lgi̇n, Rena Huseyinova
Turkish Journal of Botany
This study was conducted to investigate foliar nitrogen and phosphorus dynamics, nitrogen and phosphorus resorption, and some leaf traits (i.e. SLA=specific leaf area) in some coastal salt marsh plants located in northern Turkey. The study area is located on the east bank of the Kızılırmak River in the central Black Sea Region. There were statistically significant differences among months (from June to October) in terms of SLA in all species except for Artemisia santonicum. However, no significant differences were found with respect to P in all species. The highest N and P resorption efficiencies were found in Salicornia prostrata, whereas …
Development Of A Highly Responsive Leaf-Based Regeneration System For Peperomia Species, Mohammad Ahmadabadi, Ralph Bock
Development Of A Highly Responsive Leaf-Based Regeneration System For Peperomia Species, Mohammad Ahmadabadi, Ralph Bock
Turkish Journal of Botany
Several species in the genus Peperomia Ruiz & Pav. have giant chloroplasts in the palisade parenchyma of their leaves. Because of this unique feature, Peperomia metallica L. Linden & Rodigas has become a valuable model plant for studying plastid biology. However, the use of Peperomia for molecular studies has been limited by the lack of efficient regeneration and transformation protocols. In this work, we aimed to develop a reliable regeneration system for Peperomia from leaf explants. Using MS medium complemented with different combinations of phytohormones, a highly efficient in vitro regeneration protocol was developed for P. metallica and P. peduncularis, …
Macrofungi Of Derebucak District (Konya, Turkey), Si̇nan Alkan, Giyasetti̇n Kaşik, Si̇nan Aktaş
Macrofungi Of Derebucak District (Konya, Turkey), Si̇nan Alkan, Giyasetti̇n Kaşik, Si̇nan Aktaş
Turkish Journal of Botany
Macrofungi specimens were collected from different localities in Derebucak district (Konya province) between 2005 and 2007, particularly during the autumn and spring. As a result 134 species were identified. Thirteen of them belong to Ascomycota, and the other 121 belong to the division Basidiomycota. According to the present literature about the macrofungi of Turkey, 6 taxa are new records for Turkey. These are Lachnellula calyciformis (Willd.) Dharne of the division Ascomycota, and Hebeloma stenocystis J.Favre, Cortinarius calochrous var. coniferarum (M.M.Moser) Nezdojm., Cortinarius cupreorufus Brandrud, Inocybe ayeri Furrer-Ziogas, and Calocera pallidospathulata D.A.Reid of the division Basidiomycota.
Male Individuals In Cultivated Fritillaria Persica L. (Liliaceae): Real Androdioecy Or Gender Disphasy?, Elisa Mancuso, Lorenzo Peruzzi
Male Individuals In Cultivated Fritillaria Persica L. (Liliaceae): Real Androdioecy Or Gender Disphasy?, Elisa Mancuso, Lorenzo Peruzzi
Turkish Journal of Botany
In the last twenty years the growing number of studies about the reproductive biology in angiosperms has brought to light new cases of andromonoecy and androdioecy, the rarest sexual models among flowering plants. Female-sterile sexual systems, especially within order Liliales and family Liliaceae, often seem to occur in the particular form of size/age dependent sex allocation, known as "gender disphasy". The presence of male individuals of Fritillaria persica (Liliaceae) is here documented. Comparative morphological and functional sexual expression of this species, among males and hermaphrodites, was investigated by means of flowers counting, morphometric measurements of plants and pollen-grains, pollen viability …
A New Species Of Echinops (Asteraceae) From Turkey, Cem Vural, Mustafa Kemal Bi̇ter, Mehmet Yaşar Dadandi
A New Species Of Echinops (Asteraceae) From Turkey, Cem Vural, Mustafa Kemal Bi̇ter, Mehmet Yaşar Dadandi
Turkish Journal of Botany
Echinops dumanii C.Vural is described and illustrated from Adana province, South Anatolia, Turkey. It is considered to be endemic to Turkey. The morphological differences from the closely related species Echinops phaeocephalus Hand.-Mazz. are discussed. The International Union for Conservation of Nature (IUCN) threat category and observations on the ecology of the populations are noted. The geographical distribution of the new species is mapped.
Morphological Analyses Of Some Palaearctic Stenopogon Loew, 1847 (Diptera: Asilidae: Stenopogoninae) Based On The Spermatheca Structure, Abdullah Hasbenli̇, Fatma Bayrakdar, Selami̇ Candan, Üzeyi̇r Çağlar
Morphological Analyses Of Some Palaearctic Stenopogon Loew, 1847 (Diptera: Asilidae: Stenopogoninae) Based On The Spermatheca Structure, Abdullah Hasbenli̇, Fatma Bayrakdar, Selami̇ Candan, Üzeyi̇r Çağlar
Turkish Journal of Zoology
Females of some Stenopogon species were compared both systematically and phylogenetically utilizing spermatheca morphology. The spermathecae of 8 species and 2 subspecies of Stenopogon (S. coracinus, S. elongatus S. flavibarbis, S. junceus, S. laevigatus, S. nigriventris, S. schisticolor, S. strateagus, S. sabaudus harpax, and S. xanthotrichus xanthomelas) were examined using a scanning electron microscope and subsequently analyzed with cluster analysis. Taxa of evaluated Stenopogon were found to be separated into 2 primary groups, A and B, based on the number of spirals and the diameter of the reservoir. Group A further separated into the sub-groups A1, A2, and A3, while …
Dolichophis Caspius (Serpentes: Colubridae) In Romania: New Distribution Records From The Northern Limit Of Its Range, Severus Daniel Covaciu Marcov, Anamaria David
Dolichophis Caspius (Serpentes: Colubridae) In Romania: New Distribution Records From The Northern Limit Of Its Range, Severus Daniel Covaciu Marcov, Anamaria David
Turkish Journal of Zoology
Herein we present 2 new localities for Dolichophis caspius in southern Romania: Draganeşti Olt and Cascioarele.
Predatory Mite Fauna Of Phytoseiidae Of Northwest Iran (Acari: Mesostigmata), Hasan Rahmani, Karim Kamali, Farid Faraji
Predatory Mite Fauna Of Phytoseiidae Of Northwest Iran (Acari: Mesostigmata), Hasan Rahmani, Karim Kamali, Farid Faraji
Turkish Journal of Zoology
To determine the predatory mite family Phytoseiidae associated with spider mites in northwest Iran, a survey was carried out during 2006-2007. Nineteen species from 7 genera of the family Phytoseiidae were collected and identified. Measurements are given and some morphological characters are discussed. A key is provided to identify the adult females of the known 27 species of Phytoseiidae of that area. The following new synonymies are proposed: Neoseiulus vardgesi (Arutunjan, 1968) as a junior synonym of N. zwoelferi (Dosse, 1957); Transeius caspiansis (Denmark and Daneshvar, 1982) and T. patellae (Karg, 1982) as junior synonyms of T. wainsteini (Gomelauri, 1968); …
Effects Of Moist Chilling, Gibberellic Acid, And Scarification On Seed Dormancy In The Rare Endemic Pedicularis Olympica (Scrophulariaceae), Serap Kirmizi, Gürcan Güleryüz, Hülya Arslan, Fatma Selcen Sakar
Effects Of Moist Chilling, Gibberellic Acid, And Scarification On Seed Dormancy In The Rare Endemic Pedicularis Olympica (Scrophulariaceae), Serap Kirmizi, Gürcan Güleryüz, Hülya Arslan, Fatma Selcen Sakar
Turkish Journal of Botany
We investigated the germination requirements of a rare endemic plant species, Pedicularis olympica Boiss. (Scrophulariaceae), which grows in wet habitats on Uludağ Mountain, Turkey. We studied the effects of scarification, moist chilling (+4 °C) for 15 days, different doses of gibberellic acid (GA_{3}; 100, 150, and 250 ppm) and combined hormone and moist chilling treatments under dark (20 °C) and photoperiod (20/10 °C; 12/12 h, respectively) conditions. GA_{3} was able to break dormancy. The highest germination rate was found in the seeds treated with 250 ppm GA_{3}; 64% of these seeds germinated when treated with moist chilling and incubated in …
Seed Morphology Of Ebenus L. Species Endemic To Turkey, Fatma Bayrakdar, Zeki̇ Aytaç, Zeki̇ye Suludere, Selami̇ Candan
Seed Morphology Of Ebenus L. Species Endemic To Turkey, Fatma Bayrakdar, Zeki̇ Aytaç, Zeki̇ye Suludere, Selami̇ Candan
Turkish Journal of Botany
In the present study, seed surface morphology of species of the genus Ebenus L. in Turkey, all of which are endemic, was studied. E. plumosa var. speciosa has the biggest and E. laguroides var. laguroides has the smallest seeds. The seed shapes are spheroid in E. reesei, orbiculate in E. pisidica, and oblong-spheroid in others. Ornamentation is striate in E. macrophylla, rugose in E. haussknechtii, and reticulate or multi-reticulate in others. Microphylle is subterminal in all Turkish Ebenus species.
Pollen Morphology Of The Genus Fritillaria L. (Liliaceae) In Turkey, Mehtap Tekşen, Zeki̇ Aytaç, Nur Münevver Pinar
Pollen Morphology Of The Genus Fritillaria L. (Liliaceae) In Turkey, Mehtap Tekşen, Zeki̇ Aytaç, Nur Münevver Pinar
Turkish Journal of Botany
Pollen grains of 39 taxa of the genus Fritillaria L. in Turkey were examined by light and scanning electron microscopy. Detailed pollen morphological characteristics are given for these taxa. Our investigation shows that the sculpturing of the exine provides valuable characters for separating species. In particular, sculpturing of the exine at the proximal face turned out to be taxonomically important. Six types of ornamentation were determined: reticulate, reticulate-perforate, suprareticulate, rugulate-reticulate, psilate-perforate, and perforate. On the basis of exine sculpturing, the sulcus membrane, and the apex sulcus, 5 main pollen types are recognised.
Numerical Ages Of Selected Rudist Bivalvia: Preliminary Results, Robert W. Scott
Numerical Ages Of Selected Rudist Bivalvia: Preliminary Results, Robert W. Scott
Turkish Journal of Earth Sciences
The ranges of most biostratigraphically diagnostic fossils have been calibrated to the geologic time scale in mega-annums. Five methods for integrating fossil ranges with the numerical geologic time scale are currently used: (1) species in stratigraphic positions with radiometrically dated beds; (2) strontium isotopes of unaltered shell material; (3) cyclostratigraphic frequencies of enclosing strata; (4) integration with zones and sequence stratigraphy; and (5) graphic correlation. Preliminary studies show that rudist occurrences have been calibrated in numerical ages by Sr isotopes, zonal integration and graphic correlation. Where the same species are dated by two methods, a more complete range is the …
Classification Of Some Plant Species According To Grime’S Strategies In A Quercus Cerris L. Var. Cerris Woodland In Samsun, Northern Turkey, Mahmut Kilinç, Nesli̇han Karavi̇n, Hamdi̇ Güray Kutbay
Classification Of Some Plant Species According To Grime’S Strategies In A Quercus Cerris L. Var. Cerris Woodland In Samsun, Northern Turkey, Mahmut Kilinç, Nesli̇han Karavi̇n, Hamdi̇ Güray Kutbay
Turkish Journal of Botany
This study was carried out on 2 permanent plots of Quercus cerris L. var. cerris woodland in the Kurupelit region of Samsun, northern Turkey. Grime's CSR strategies were determined for 85 plant species from the 2 study plots (61 and 50 species from plot 1 and plot 2, respectively) according to the method that was applied. Most of the plant species in both plots had secondary and tertiary strategies, and this suggests that plants were exposed to more than one pressure factor. In both plots, CR (competitor-ruderal) was the most common strategy.
The Diatoms Of Asartepe Dam Lake (Ankara), With Environmental And Some Physicochemical Properties, Tahi̇r Atici, Emi̇ne Olcay Obali
The Diatoms Of Asartepe Dam Lake (Ankara), With Environmental And Some Physicochemical Properties, Tahi̇r Atici, Emi̇ne Olcay Obali
Turkish Journal of Botany
The shoreline benthic diatoms of Asartepe Dam Lake were identified from different habitats (epipelic, epiphytic, and epilithic) at 7 sampling stations between April 2003 and June 2004. In the investigation, a total of 93 taxa were identified. Of those, Cymbella affinis Kütz., Navicula radiosa Kütz., Ulnaria ulna (Nitzsch) Compère, Pinnularia borealis Ehrenb., Amphora ovalis (Kütz.) Kütz., Cyclotella ocellata Pant. and Nitzschia dissipata (Kütz.) Grunow were observed and abundant at all stations. Some physical and chemical water quality parameters were measured and correlated with biological parameters.
Petrography And Geochemistry Of The Jajarm Bauxite Ore Deposit, Northeast Iran: Implications For Source Rock Material And Ore Genesis, Dariush Esmaeily, Hosein Rahimpour-Bonab, Amir Esna-Ashari, Ali Kananian
Petrography And Geochemistry Of The Jajarm Bauxite Ore Deposit, Northeast Iran: Implications For Source Rock Material And Ore Genesis, Dariush Esmaeily, Hosein Rahimpour-Bonab, Amir Esna-Ashari, Ali Kananian
Turkish Journal of Earth Sciences
The Jajarm bauxite deposit, northeast Iran, is the largest such deposit in Iran. The deposit is sandwiched between the Triassic Elika formation and the Jurassic Shemshak formation, housed within karstic features developed within the former unit. The deposit generally shows an internal layering defined by the following four distinct horizons (from bottom to top): (a) a lower argillaceous horizon, approximately 50-80 cm thick, is mainly composed of clay minerals that directly overlies the carbonate footwall (Elika formation); (b) a bauxitic clay layer approximately 2-3 m thick that consists mainly of hematite, kaolinite, anatase, and diaspore; (c) a red bauxite layer …
Ontogeny And Funtional Morphology Of A Lower Cretaceous Carpinid Rudist (Bivalvia, Hippuritoida), Robert W. Scott, Meghan Weaver
Ontogeny And Funtional Morphology Of A Lower Cretaceous Carpinid Rudist (Bivalvia, Hippuritoida), Robert W. Scott, Meghan Weaver
Turkish Journal of Earth Sciences
Caprinuloidea rudists are locally abundant and widespread in Lower Cretaceous (Albian Stage) Edwards Formation in Texas. Landward of the shelf margin on the shallow marine Comanche Shelf rudists built circular and elongate bioherms with coarse-grained flank deposits. Two caprinid morphotypes suggest that some lived as elevators above the substrate and others were recumbent upon mobile grain flats. Elevators have elongated attached valves and weakly coiled free valves and recumbents have arcuate attached valves and strongly coiled free valves. Detailed morphologic studies are not possible on the many molds and casts, but a few specimens are silicified. Their internal structures can …
A New Species Of Polyconites From The Lower Aptian Of Iberia And The Early Evolution Of Polyconitid Rudists, Peter W. Skelton, Eulàlia Gili, Telm Bover-Arnal, Ramon Salas, Josep Anton Moreno-Bedmar
A New Species Of Polyconites From The Lower Aptian Of Iberia And The Early Evolution Of Polyconitid Rudists, Peter W. Skelton, Eulàlia Gili, Telm Bover-Arnal, Ramon Salas, Josep Anton Moreno-Bedmar
Turkish Journal of Earth Sciences
The main diagnostic character of polyconitid rudists is a distinctive ectomyophoral cavity inserted behind a reflexed posterior myophoral plate in the left valve. The only pre-Aptian Old World polyconitid taxon recognized in the current literature is Horiopleura dumortieri (Matheron): this species clearly shows the prominent posterior myophoral shelf in the right valve that is diagnostic of the genus, which continues into the Albian. Polyconites, by contrast, has a more depressed (operculiform) left valve and its posterior adductor was inserted on an inward-sloping swelling on the right valve inner wall, with no projecting shelf. Hitherto, the earliest known species of Polyconites …
Debrunia Occitanica Nov. Sp. (Monopleuridae) From The Early Aptian Of Se France, Mükerrem Fenerci̇-Masse, Jean-Pierre Masse
Debrunia Occitanica Nov. Sp. (Monopleuridae) From The Early Aptian Of Se France, Mükerrem Fenerci̇-Masse, Jean-Pierre Masse
Turkish Journal of Earth Sciences
Debrunia occitanica nov. sp., described from the early Aptian platform limestones of SE France, is characterized by: a moderately convex left valve, inconspicuous radial bands and a ligament groove in a depression flanked by two longitudinal rounded edges. Debrunia occitanica nov. sp. is considered as a chronospecies belonging to a single lineage rooted in the Barremian, and including Debrunia bruni and Debrunia mutabilis. Evolutionary trends in the three species include flattening of the left valve, development of the corresponding myophores, and reduction of the radial bands. This new species has the potential to be a stratigraphic marker for the early …