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Felix Schlagintweit - One of the best experts on this subject based on the ideXlab platform.
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some microfossils Dasycladales benthic foraminifera sponges from the upper jurassic mozduran formation ne iran kopet dagh and their biostratigraphic and palaeobiogeographic importance
Rivista Italiana Di Paleontologia E Stratigrafia, 2019Co-Authors: Felix Schlagintweit, Zohreh Kadivar, Koorosh RashidiAbstract:The Mozduran Formation represents mainly carbonatic shallow-water deposits from the Kopet-Dagh basin of northeast Iran. Longtime considered to be of exclusively Late Jurassic (Oxfordian-Kimmeridgian) age, its ranging into the Early Cretaceous has been demonstrated in recent times. The micropalaeontological inventory and biostratigraphic data however, are still poorly constrained. In the present contribution, some taxa of Dasycladales [Campbelliella striata (Carozzi), Montenegrella florifera Bernier, Petrascula bugesiaca Bernier, Petrascula cf. bursiformis (Ettalon), Triploporella sp.], benthic foraminifera [Neokilianina rahonensis (Foury & Vincent), Spiraloconulus suprajurassicus Schlagintweit], and sponges (Paronadella? sp., Neuropora lusitanica G. Termier & H. Termier, Thalamopora sp.) are reported. Some taxa are reported for the first time from this formation, some even for the first time from Iran. The identified assemblage is assigned to the Tithonian, although a late Kimmeridgian age for the lowermost part of the section studied is possible. A palaeobiogeographic restriction to the former Neotethysian margin might be possible for the two Petrascula species.
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SOME MICROFOSSILS (Dasycladales, BENTHIC FORAMINIFERA, SPONGES) FROM THE UPPER JURASSIC MOZDURAN FORMATION (NE IRAN, KOPET-DAGH) AND THEIR BIOSTRATIGRAPHIC AND PALAEOBIOGEOGRAPHIC IMPORTANCE
Università degli Studi di Milano, 2019Co-Authors: Felix Schlagintweit, Zohreh Kadivar, Koorosh RashidiAbstract:The Mozduran Formation represents mainly carbonatic shallow-water deposits from the Kopet-Dagh basin of northeast Iran. Longtime considered to be of exclusively Late Jurassic (Oxfordian-Kimmeridgian) age, its ranging into the Early Cretaceous has been demonstrated in recent times. The micropalaeontological inventory and biostratigraphic data however, are still poorly constrained. In the present contribution, some taxa of Dasycladales [Campbelliella striata (Carozzi), Montenegrella florifera Bernier, Petrascula bugesiaca Bernier, Petrascula cf. bursiformis (Éttalon), Triploporella sp.], benthic foraminifera [Neokilianina rahonensis (Foury & Vincent), Spiraloconulus suprajurassicus Schlagintweit], and sponges (Paronadella? sp., Neuropora lusitanica G. Termier & H. Termier, Thalamopora sp.) are reported. Some taxa are reported for the first time from this formation, some even for the first time from Iran. The identified assemblage is assigned to the Tithonian, although a late Kimmeridgian age for the lowermost part of the section studied is possible. A palaeobiogeographic restriction to the former Neotethysian margin might be possible for the two Petrascula species
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morelletpora turgida radoicic 1975 non 1965 a tethyan calcareous green alga Dasycladales taxonomy stratigraphy and paleogeography
Cretaceous Research, 2016Co-Authors: Ioan I Bucur, Felix Schlagintweit, Koorosh Rashidi, Behnam SaberzadehAbstract:Abstract Pianella turgida , originally described from Cenomanian limestones of the external Dinarids, was subsequently transferred to the genus Salpingoporella . In the middle of the last century, Varma described the genus Morelletpora with Morelletpora nammalensis as type species from the Paleocene of India. Varma considered the new alga to be articulated, with club-shaped segments and only first order laterals. This foundation of Morelletpora was questioned for a long time. Attribution of a second species to Morelletpora , Morelletpora dienii , from the uppermost Cretaceous of southern Italy by Parente, reopened discussion of the genus. Subsequently, Barattolo attributed Salpingoporella turgida to Morelletpora , as Morelletpora turgida nov. comb., and considered the species as being “structurally similar to M. dienii ”. Recent studies of Lower Cretaceous deposits from Iran revealed the existence of numerous, well-preserved specimens of Morelletpora turgida in the upper Barremian-Aptian Taft Formation of the Ardekan–Hersisht and Anarak areas of central Iran. These specimens allow a thorough morphological re-description of this alga and provide clear evidence for both the segmented character of the thallus and the characteristic shape of the laterals. These new data reinforce the assignment of this alga to Morelletpora , adding observations that support emendation of the diagnosis. Morelletpora turgida has been identified in limestones of Barremian-Cenomanian age from numerous regions representing the southern and central part of the Tethyan Domain.
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calcareous algae Dasycladales udoteaceae from the cenomanian altamira formation of northern cantabria spain
2014Co-Authors: Felix Schlagintweit, Markus WilmsenAbstract:An assemblage of calcareous algae (Dasycladales, Udoteaceae) is described from the upper Lower to Middle Cenomanian Altamira Formation of the North Cantabrian Basin, northern Spain. The algae occur in bioclastic for-algal grain-/packstones and near-reefal rudstones of an external carbonate platform facies. An equivalent assemblage is known from the late Albian of the Pyrenees and the Basco-Cantabrian Chains. One new species is introduced as Boueina iberica n. sp.
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Acicularia? weisswasserensis n. sp. and Terquemella? microsphaera n. sp., two new Dasycladales from the Upper Cretaceous (Late Turonian-Santonian) of the Northern Calcareous Alps (Gosau Group, Austria)
Facies, 2011Co-Authors: Felix Schlagintweit, Diethard SandersAbstract:Two new dasycladalean algae are described from the Gosau Group of the Northern Calcareous Alps in Austria. The tiny spicules of Acicularia ? weisswasserensis n. sp. were found in foraminiferal wacke- to packstones associated with rudist limestones of the Weisswasser locality (Middle Coniacian), Lower Austria. The small globulous Terquemella ? microsphaera n. sp. occurs in marls to marly limestones of the Pletzachalm locality (Upper Turonian), Tyrol, and Russbach locality (Upper Santonian), Lower Austria. The Terquemella - Acicularia group requires taxonomic revision; the two forms described herein, however, are clearly distinct from other species, and belong to the smallest representatives of these genera. In addition, Acicularia ? aff. magnapora Kuss and morphologically similar forms interpreted as gametophores of unknown larger Dasycladales are described.
Ioan I Bucur - One of the best experts on this subject based on the ideXlab platform.
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selliporella johnsonii praturlon nov comb and selliporella neocomiensis radoicic green algae Dasycladales taxonomic reconsideration and chronostratigraphic calibration
Cretaceous Research, 2021Co-Authors: Filippo Barattolo, Ioan I Bucur, Sabrina Amodio, Mariarosaria MartinoAbstract:Abstract Diplopora johnsoni and Selliporella neocomiensis are often considered synonymous. The two taxa share the same pattern consisting in a cylindrical, articulated biomineralised skeleton bearing whorls of short primary laterals followed by numerous long, trichophorous, secondary laterals. An exhaustive study, entailing a review of Praturlon's type-material of Diplopora johnsoni, displays the different framework and biometry between them. Therefore, the two species are considered separate taxa. Moreover, a controversial generic attribution of the two taxa is highlighted in literature: Selliporella neocomiensis has been attributed to both the genus Pseudoclypeina and to the genus Selliporella, while Diplopora johnsoni has been assigned to the genus Pseudoclypeina. Regarding the comparison between the genera Selliporella and Pseudoclypeina, and their respective type species, there is no doubt that Diplopora johnsoni and Selliporella neocomiensis display the closest affinity with Selliporella (short primary laterals and trichophorous secondary laterals) and not with Pseudoclypeina (long phloiophorous primary laterals and phloiophorous secondary laterals). Thus, the two taxa are ascribed to the genus Selliporella. The former species is named Selliporella johnsonii n.comb. Further relevant results show that Selliporella johnsonii and Selliporella neocomiensis display a different chronostratigraphic distribution. In the Apennine Carbonate Platform (southern Apennines, Italy), Selli-porella johnsonii has been well calibrated through high-resolution C-isotope stratigraphy and biostratigraphy as revealed in previous studies. This taxon constitutes a peculiar bioevent set between the end of the Weissert event and the Valanginian−Hauterivian boundary, thus may serve as a possible instrument in locating the Weissert event in the field. On the other hand, Selliporella neocomiensis found in the Getic Carbonate Platform (South Carpathians, Romania), appears to characterise the Berriasian stage.
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morelletpora turgida radoicic 1975 non 1965 a tethyan calcareous green alga Dasycladales taxonomy stratigraphy and paleogeography
Cretaceous Research, 2016Co-Authors: Ioan I Bucur, Felix Schlagintweit, Koorosh Rashidi, Behnam SaberzadehAbstract:Abstract Pianella turgida , originally described from Cenomanian limestones of the external Dinarids, was subsequently transferred to the genus Salpingoporella . In the middle of the last century, Varma described the genus Morelletpora with Morelletpora nammalensis as type species from the Paleocene of India. Varma considered the new alga to be articulated, with club-shaped segments and only first order laterals. This foundation of Morelletpora was questioned for a long time. Attribution of a second species to Morelletpora , Morelletpora dienii , from the uppermost Cretaceous of southern Italy by Parente, reopened discussion of the genus. Subsequently, Barattolo attributed Salpingoporella turgida to Morelletpora , as Morelletpora turgida nov. comb., and considered the species as being “structurally similar to M. dienii ”. Recent studies of Lower Cretaceous deposits from Iran revealed the existence of numerous, well-preserved specimens of Morelletpora turgida in the upper Barremian-Aptian Taft Formation of the Ardekan–Hersisht and Anarak areas of central Iran. These specimens allow a thorough morphological re-description of this alga and provide clear evidence for both the segmented character of the thallus and the characteristic shape of the laterals. These new data reinforce the assignment of this alga to Morelletpora , adding observations that support emendation of the diagnosis. Morelletpora turgida has been identified in limestones of Barremian-Cenomanian age from numerous regions representing the southern and central part of the Tethyan Domain.
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representatives of the genus triploporella Dasycladales calcareous algae in the lower cretaceous limestones of romania
Facies, 2013Co-Authors: Ioan I Bucur, Bruno Granier, Călin Bruchental, Ioan Cociuba, Ancamariana Hebristean, Danielflorin Lazar, Alexandru Vlad Marian, Emanoil SăsăranAbstract:Recent studies on the Lower Cretaceous deposits located in various areas of the Romanian Carpathians resulted in the identification of several specimens of dasycladalean algae assigned to the genus Triploporella including Triploporella carpatica Bucur, Triploporella cf. praturlonii Barattolo, Triploporella cf. steinmannii Barattolo, Triploporella sp. 1, Triploporella sp. 2, and Triploporella n. sp. This paper provides arguments on their taxonomic assignment, together with discussions on the Triploporella species described in the literature and their paleobiogeographic significance.
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nouvelles especes de Dasycladales du cretace inferieur de provence s e france
Revue de Micropaléontologie, 1999Co-Authors: Jeanpierre Masse, Ioan I Bucur, Aurelien Virgone, Helene DalmassoAbstract:Resume Dans le Cretace inferieur de Provence Cylindroporella faronensis n. sp. et Cylindroporella massiliana n. sp. sont des especes de petite taille et a petit nombre de ramifications. La premiere va du Berriasien moyen (inferieur p.p.?) au Valanginien inferieur, la seconde est presente dans l'Hauterivien inferieur mais pourrait apparaitre plus tot dans d'autres regions. Clypeina isabellae n. sp. est egalement une forme de petite taille, a microstructure fibreuse jaunâtre, proche de Clypeina sulcata, elle est cantonnee dans le Berriasien moyen (inferieur p.p. ?) et superieur. Outre leur potentiel biostratigraphique et paleobiogeographique ces especes provencales sont interessantes par leur niveau d'evolution. Elles presentent au plan generique des comportements distinets vis-a-vis de la « loi de Cope .
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some new or poorly known calcareous algae Dasycladales gymnocodiaceae in the lower cretaceous deposits from the resita moldova noua zone southern carpathians romania
Revista española de micropaleontología, 1993Co-Authors: Ioan I BucurAbstract:The algal assemblages identified in the Lower Cretaceous deposits lying in The Resita-Moldova Noua zone have revealed the presence of new species and genera. The present paper describes three new genera and eight new species. Most of them belong to the order Dasycladales: Heteroporella tominae n. Sp., Dissocladella pulcherrima n. Sp., Cymopolia? dubia n. Sp., Zalmoxisiella ciclovensis n. Gen., n. Sp., Triploporella carpatica n. Sp., Similictpeina conradi n. Gen., n. Sp., Similiclypeina? iustiniani n. Sp., and Bakalovaella n. Gen., with the type species Cylindroporella elitzae Bakalova. A new species may be assigned to the Gymnocodiaceae: Permocalculus (Pyrulites) deceneii n. Sp. Besides the new taxa, mention is also made of several Dasycladales that are less known and have a more restricted distribution area: Dissocladella aff. Intercedens Bakalova, Praturlonella nerae (Dragastan, Bucur et Demeter) nov. Comb. And Similiclypeina aff. Somalica (Conrad, Peybernes et Masse) nov. Comb.
Georg Pohnert - One of the best experts on this subject based on the ideXlab platform.
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sulfated phenolic acids from Dasycladales siphonous green algae
Phytochemistry, 2015Co-Authors: Caroline Kurth, Matthew Welling, Georg PohnertAbstract:Sulfated aromatic acids play a central role as mediators of chemical interactions and physiological processes in marine algae and seagrass. Among others, Dasycladus vermicularis (Scopoli) Krasser 1898 uses a sulfated hydroxylated coumarin derivative as storage metabolite for a protein cross linker that can be activated upon mechanical disruption of the alga. We introduce a comprehensive monitoring technique for sulfated metabolites based on fragmentation patterns in liquid chromatography/mass spectrometry and applied it to Dasycladales. This allowed the identification of two new aromatic sulfate esters 4-(sulfooxy)phenylacetic acid and 4-(sulfooxy)benzoic acid. The two metabolites were synthesized to prove the mass spectrometry-based structure elucidation in co-injections. We show that both metabolites are transformed to the corresponding desulfated phenols by sulfatases of bacteria. In biofouling experiments with Escherichia coli and Vibrio natriegens the desulfated forms were more active than the sulfated ones. Sulfatation might thus represent a measure of detoxification that enables the algae to store inactive forms of metabolites that are activated by settling organisms and then act as defense.
Branko Sokac - One of the best experts on this subject based on the ideXlab platform.
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montenegrella gracilis n sp a new calcareous alga Dasycladales from the upper barremian of mt biokovo dinarides mts croatia
Geologia Croatica, 2015Co-Authors: Branko Sokac, Tonci GrgasovicAbstract:Montegrella? gracilis n.sp. (Dasycladales) is characterized by thick calcareous envelope and narrow central cavity. Bipartite branches are arranged alternately in consecutive whorls. The primaries are visibly differentiated into a thin, tendril-like stalk in the proximal part and a club-shaped or ellipsoidal inflated swelling in the distal part. The secondaries are poorly visible, of unclear shape and number, with a supposedly common starting point. On the type-locality, the alga occurs within a rich, typically Upper Barremian, algal assemblage. The validity of the genus Montenegrella , being disputed by BARATTOLO (1983), is commented upon by showing the generic attribution of the same or different species either to Suppiluliumaella or to Montenegrella by different authors.
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on some peri mediterranean lower cretaceous dasyclad species calcareous algae Dasycladales previously assigned to different genera
Geologia Croatica, 2004Co-Authors: Branko SokacAbstract:The taxonomic position of some dasyclad species which were previously assigned to the same taxon or, alternatively, were assigned to different genera by different authors, is discussed and revised, respectively. The material described and figured as Cylindroporella lyrata MASSE & LUPERTO-SINNI is shown to be heterogeneous (also partly described as Salpingoporella robusta SOKAC) and some figured sections are shown to possess new characteristic features. These forms are therefore singled out and described as Biokoviella n.gen. with two species: B. robusta (SOKAC) n.comb. and B. gusici n.sp. Macroporella aptiensis SOKAC is shown to represent the infertile (sterile) forms of Neomeris cretacea STEINMANN and, consequently, has to be regarded as the younger objective synonym of the latter. New material, with clearly visible morphological characteristics, has enabled the “resurrection” of the controversial genus Korkyrella SOKAC & VELIC, 1981, and its species, K. texana (JOHNSON), which was originally invalidly described.
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scinderella scopuliformis nov gen nov sp Dasycladales green algae from the middle triassic of croatia
Geobios, 2002Co-Authors: Tonci Grgasovic, Branko Sokac, Josip HalamicAbstract:Scinderella scopuliformis nov. gen., nov. sp. is identified in the Anisian (Middle Triassic) reef limestones from the Belski dol quarry (Ivanscica Mt., NW Croatia). The new alga is characterised by claviform thallus, curved in the basal part, and very narrow central cavity. Thallus is often disintegrated into fragments. Laterals swell from a thin basal part, and have uniform (rarely slightly increasing) diameter along most of their length. Distally, they are flattened and probably touch each other, forming an irregular cortex. Laterals are arranged densely in close whorls and oblique to the longitudinal axis. Euspondyl arrangement is readily visible in the proximal part of the laterals, but distally, the arrangement seems more or less irregular, i.e. ruffled (Lat. scindere = ruffle, dishevel) and resembling a broom (Lat. scopulae = small broom; forma = form, shape).
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salpingoporella donatae n sp Dasycladales from upper cretaceous limestone of the environs of primosten dalmatia croatia
Geologia Croatica, 2000Co-Authors: Branko SokacAbstract:A new species of the dasyclad genus Salpingoporella, S. donatae, is characterized by wavy primary ramifications, which makes it easily distinguishable from other species of the genus. It derives from platy algal pelletal packstones and grainstones from the Lower Coniacian to Campanian deposits of the environs of Primosten, Dalmatia. Uragiella matzi SOKAC & VELIC has already been described from the same deposits.
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triassic Dasycladales from croatia a review
Seventh International Symposium on Fossil Algae, 1999Co-Authors: Tonci Grgasovic, Branko SokacAbstract:The new Dasycladalean species Salpingoporella scopuliformis n. sp. was identified in the Anisian limestones from the Belski dol quarry (Ivancica Mt.).
Bruno Granier - One of the best experts on this subject based on the ideXlab platform.
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a new and unique bodyplan in fossil bryopsidales with description of jaffrezocodium bipennatus n gen n sp an albian cenomanian calcareous green alga
Cretaceous Research, 2018Co-Authors: Bruno GranierAbstract:Abstract This short contribution deals with a fossil calcareous alga found in (?) Albian and Cenomanian strata of N Spain and S France. This taxon is characterized by its uncommon and previously misinterpreted bodyplan. Its rhombic sections were first ascribed to a puzzling form of Dasycladales, but they prove to belong to Bryopsidales.
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Anisian Dasycladales from Upper Silesia and adjacent regions
Carnets de géologie (Notebooks on geology), 2013Co-Authors: Zbigniew Kotański, Bruno Granier, Tadeusz PerytAbstract:Anisian Dasycladales (calcareous algae) from the Diplopora Dolomite of the Upper Silesia and adjacent regions of S Poland are revised. All previously reported taxa are critically reviewed and illustrated. New paleontological samples were collected from 74 outcrops and from 45 boreholes. The abundant material includes both specimens visible on fractured rock surfaces and thin-sectioned ones; 24 species of Dasycladales are identified, including three new species: Oligoporella chrzanowensis n.sp., Physoporella polonoandalusica n.sp., and Salpingoporella krupkaensis n.sp. Best-preserved specimens are illustrated in 39 plates. The identified species were compared with Alpine and Carpathian forms of stratigraphic importance. Six Dasycladalean local horizons are defined. The Pelsonian-Illyrian boundary occurs in the middle part of the Diplopora Dolomite. Its uppermost part, despite the presence of Diplopora annulata, belongs to the Illyrian, not to the Fassanian, as also corroborated by conodont correlations. The peculiar state of preservation (internal moulds and double tubes) is discussed; it is due to early syngenetic dolomitisation. The palaeoenvironment of the algae is determined as sublittoral. Dasycladales flourished upon a peri-Tethyan carbonate platform, widely connected with the Alpine-Carpathian seas. Five palaeoecological assemblages are recognized, differing in their bathymetric and turbulence conditions, and living in marine shoals and shallow basins separating them. The Upper Silesian platform was separated from the hypersaline Germanic Basin of the Middle Muschelkalk by banks and oolite and bioclastic barriers, blocking dispersal of marine biota. A wide connection existed with the Alpine-Carpathian seas, allowing immigration of High-Tatric, Križna and even South Alpine flora to the Upper Silesian Carbonate Platform.
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Revision of the Jesse Harlan Johnson Collection. Part 1. Some fossil Dasycladales from Guatemala
Carnets de Geologie, 2013Co-Authors: Bruno Granier, Rajka Radoičić, Katica DrobneAbstract:This first report is a revision of fossil calcareous green algae (Dasycladales) described from the Upper Cretaceous and Paleocene series of Guatemala. Among other things in their 1965 paper J.H. Johnson and H.V. Kaska introduced three new species originally referred to the genera Acroporella, Cylindroporella, and Cymopolia. One species, which has previously been referred to the genus Cylindroporella, is a foraminifer.
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representatives of the genus triploporella Dasycladales calcareous algae in the lower cretaceous limestones of romania
Facies, 2013Co-Authors: Ioan I Bucur, Bruno Granier, Călin Bruchental, Ioan Cociuba, Ancamariana Hebristean, Danielflorin Lazar, Alexandru Vlad Marian, Emanoil SăsăranAbstract:Recent studies on the Lower Cretaceous deposits located in various areas of the Romanian Carpathians resulted in the identification of several specimens of dasycladalean algae assigned to the genus Triploporella including Triploporella carpatica Bucur, Triploporella cf. praturlonii Barattolo, Triploporella cf. steinmannii Barattolo, Triploporella sp. 1, Triploporella sp. 2, and Triploporella n. sp. This paper provides arguments on their taxonomic assignment, together with discussions on the Triploporella species described in the literature and their paleobiogeographic significance.
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cenozoic Dasycladales a photo atlas of thanetian ypresian and bartonian species from the paris basin
Carnets de Géologie, 2011Co-Authors: Patrick Genot, Bruno GranierAbstract:Cenozoic Dasycladales of the French sedimentary basins are noteworthy for the exceptional quality of their preservation. Although most fossil Dasycladales are known only in thin sections often difficult to interpret, the coatings of the Dasycladales in these basins, particularly in the Paris basin, are easy to extract from sandy sediments and then are examined under the electron microscope. This method of investigation facilitates greatly the identification of the external and internal features of each species.
