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Search Results: 1 - 10 of 16 matches for " Dasycladales "
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Linoporella buseri Radoi i , 1975, revisited: A Liassic dasycladalean alga from the Dinarides and continental Italy
Radoi?i? Rajka,Conrad André Marc,Carras Nicolaos
Geolo?ki Anali Balkanskog Poluostrva , 2009, DOI: 10.2298/gabp0970061r
Abstract: The Liassic Linoporella buseri is re-examined, on the basis of an abundant material of reefal origin, originating from the newly described type-locality in Slovenia. It is compared with the Berriasian-Valanginian type-species L. capriotica, studied by BARATTOLO & ROMANO (2005). Both species have three orders of laterals. In L. buseri, however, apart of other, clear cut differences, the tertiary laterals are usually hair-like, occasionally phloiophorous at tip, forming a distal cortex such as in L. capriotica. Consequently, the genus Linoporella is slightly emended, to fit observations made on the two species.
The occurrence of Salpingoporella milovanovici Radoi i (Dasycladales) in the Cenomanian of south Apenninies and Dinarides
Andrea Sgrosso,Paola Esposito
Geologija , 1997,
Abstract:
The Imam case. Additional investigation of a micropaleontological fraud
Granier Bruno,Feist Monique,Hennessey Edward,Bucur Ioan I.
Carnets de Géologie , 2009,
Abstract: Starting in 1996 and for almost a decade, M.M. Imam contributed to twelve papers published in international geological journals. These papers dealt with the micropaleontology and biostratigraphy of Cretaceous to Miocene series from Egypt and Libya. They were abundantly illustrated in order to support the author's findings and interpretations. However most photographic illustrations (189 at least) were fabricated with material lifted from the publications of other authors, commonly from localities or stratigraphic intervals other than those indicated by M.M. Imam.
Bucurella, a new genus of the Thyrsoporelleae (fossil Dasycladalean algae)
Granier Bruno
Carnets de Géologie , 2010,
Abstract: A new genus, Bucurella, is described and figured; it is based on Macroporella espichelensis Deloffre et Ramalho, 1971, a taxon known only from the Late Jurassic. It is characterized by the presence of distinctive whorls, each with three thick and broad (fertile) ramifications. The lateral division formula is 1 F: 3 F: (3x2) F: (3x2x2) F = (1: 3: 6: 12); that is the primary ramification divides into three secondaries which in turn branch dichotomously into tertiaries and again into quaternaries. It and its descendant, Zergabriella, are assigned to the Tribe Thyrsoporelleae.
Note on Paleocene algae in the Dubrovnik coast - Adriatic carbonate platform
Radoi?i? Rajka
Geolo?ki Anali Balkanskog Poluostrva , 2003, DOI: 10.2298/gabp0301029r
Abstract: The presence of Paleocene in the Dubrovnik Coast (Adriatic Carbonate Platform) is documented by algal flora in the locality Plo ice, Konavli. The algal assemblage includes more than 20 species. Ten taxa present in the Paleocene of the Karst (NE Italy-Slovenia) occur in Plo ice: Acroporella chiapasensis DELOFFRE, FOURCADE & MICHAUD, Decastroporella tergestina BARATTOLO, Drobnella slovenica BARATTOLO, Dissocladella gracilis RADOI I Hamulusella? liburnica (RADOI I ), Cymopolia elongata (DEFRANCE) MUNIER-CHALMAS, Cymopolia paronai RAINERI, Cymopolia satyavanti (PIA) Cymopolia cf. barberae ELLIOTT and Microsporangiella buseri BARATTOLO. The stratigraphy of the Konavli carbonate belt has been revised in this study.
Observations on Dissocladella annulata (Elliott, 1993) nov. comb. (Calcareous algae, Dasycladales) from the Cenomanian of west Serbia
Radoi?i? Rajka,Schlagintweit Felix
Geolo?ki Anali Balkanskog Poluostrva , 2010, DOI: 10.2298/gabp1071053r
Abstract: Based on material from the type area at Tetrebovo in the Zlatibor massif of WSerbia, the Cenomanian dasycladalean alga originally described as Harlanjohnsonella annulata by ELLIOTT (1968, typified 1993 in: GRANIER & DELOFFRE), is emended and revisited as Dissocladella annulata (ELLIOTT) nov. comb. The evidence of tufts of short secondaries arising at the top of the drop-like primaries allows its transfer to the genus Dissocladella PIA, 1936. This species displays a different degree of skeleton calcification which is described in detail. The monospecific genus Harlanjohnsonella ELLIOTT becomes invalid, as being a junior synonym of Dissocladella.
Barremian-Aptian Dasycladalean algae, new and revisited from the Tirgan Formation in the Kopet Dagh, NE Iran
Taherpour Khalil Abad Morteza,Conrad Marc André,Aryaei Ali Asghar,Ashouri Ali Reza
Carnets de Géologie , 2010,
Abstract: Abundant, diversified algal assemblages comprising more than 25 species of Dasycladales are described from Barremian-Aptian limestone deposits of the Tirgan Formation in NE Iran. New species are described: one of them possibly belongs to a new endosporate genus, tentatively assigned the Triploporellaceae; two others, Clypeina ? sp. 1 and Rajkaella ? sp. 1, are left in open nomenclature. The widely distributed, locally abundant Montiella ? elitzae is revisited, because of the presence of a complete, exceptionally well preserved specimen. Yet to be demonstrated, the species is a junior synonym of Turkmenaria adducta Maslov, also originally described from the Kopet Dagh. Other species found in the Arkan section have already been reported from remote locations, primarily in Europe, in areas corresponding to the Northern and/or Southern Tethyan domains. Some of them are known only from the Hauterivian and/or the Barremian, excluding the Aptian, thus dating the lower part of the Arkan section as Barremian, but not excluding the Late Hauterivian.
Dasycladalean green algae and some problematic algae from the Upper Triassic of the Nayband Formation (northeast Iran)
Baba Senowbari-Daryan, Koorosh Rashidi, Behnam Saberzadeh
Geologica Carpathica , 2011, DOI: 10.2478/v10096-011-0036-5
Abstract: This paper describes the dasycladales green algae from two sections of the Rhaetian Howz-e Khan Member of the Nayband Formation, northwest of the Dig-e Rostam motorway service area (south of the type locality of the Formation near the town Naybandan). Both sections are composed of bedded fine-grained limestones containing partly abundant dasycladales algae associated with foraminifers, which are mainly aulotortid types. Additionally scattered samples were collected from several beds of the Howz-e Khan Member in this area. The following dasycladalean taxa are described: Chinianella carpatica (Bystricky), Griphoporella curvata (Gümbel), Griphoporella lutensis nov. sp., some undetermined dasycladacean taxa, problematic algae like Lithocodium aggregatum Elliott, Bacinella irregularis Radoicic, and Thaumatoporella parvovesiculifera (Raineri). While Chinianella carpatica is not numerous and the other described algae are rare, Griphoporella curvata is extremely abundant in the investigated material. This paper describes Ch. carpatica for the first time from the Triassic of Iran and also includes a discussion of the strong variability of G. curvata. Additionally we include an informal description of a problematic fossil (animal: shell fragment?; plant: alga?).
Trinocladus divnae and montiella filipovici: A new species (Dasycladales, green algae) from the Upper Cretaceous of the Mountain Pa trik (Mirdita Zone)
Radoi?i? Rajka
Geolo?ki Anali Balkanskog Poluostrva , 2006, DOI: 10.2298/gabp0667065r
Abstract: Two new dasycladalean species from the Upper Cretaceous of the Mountain Pa trik, Kukes Cretaceous Unit of the Mirdita Zone are described: Trinocladus divnae sp. nov. is characterized by variable size of the thallus, relatively narrow main axis, typical Trinocladus organization of the laterals and thin calcification limited to the distal part of the thallus which includes a swollen part of secondaries and short tertiaries. Often, the internal portion of the whorls (except sometimes the main stem membrane), tends to dissolve and form dissolution cavities filled with cement. Montiella filipovici sp. nov. is characterized by a primary skeleton made of a thin individual sheath around a fertile ampullae, often obliterated by recrystallization. Four to six laterals, each giving one secondary and one fertile ampulla located on the upper side of the relatively thick short primary lateral. Upper Cenomanian limestone with Cisalveolina fraasi and Trinocladus divnae sp. nov. was deposited immediately before the events that resulted in sea level rising. The middle and upper Cenomanian eustatic-tectonic processes had different effects in the Pa trik shallow water areas, depending on the distance from the basinal part of the Unit. Bathymetric changes in a part of the Pa trik sedimentary area were not significant, even negligible. Montiella filipovici is found in the post-fraasi shallow water sequence, assigned to the ?uppermost Cenomanian-lowermost Turonian (= Whiteinella archaeocretacea Zone p. p.; a short stratigraphic gap, in a part of the area, is noted). Shallow water limestone with Turonian taxa, corresponding to the helvetca Zone, occurs a few meters upward. Supplementary note: the species Cylindroporella parva RADOI I is transferred in the genus Montiella, the species Permocalculus elliotti JOHNSON is transferred in the genus Trinocladus, while the species Trinocladus bellus YU JING is transferred in the genus Belzungia.
New Dasycladalean Alga from the Upper Cretaceous of the Island Pa man, Croatia
Radoi?i? Rajka
Geolo?ki Anali Balkanskog Poluostrva , 2002, DOI: 10.2298/gabp0264083r
Abstract: The minute Salpingoporella - S. pasmanica n. sp. - is described. It was found in hemipelagics limestone of the Dalmatian island Pa man, Adriatic Carbonate Platform.
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