Paleozoic Foraminifera Research Articles

PALEOZOIC FORAMINIFERA: CURRENT STATE OF THE CLASSIFICATION AND PERSPECTIVES

An updated classification of Paleozoic foraminifera is proposed, consisting of three classes. Calcareous Paleozoic foraminifera are mainly included in the class Fusulinata but also represented in the classes Miliolata and Nodosariata. The current classification includes in the Fusulinata: 2 subclasses, 5 orders, 25 superfamilies, 65 families, 51 subfamilies, 572 genera, 14 subgenera, in the Miliolata: 1 order, 2 suborders, 2 superfamilies, 8 families, 9 subfamilies, 89 genera, and in the Nodosariata: 1 order, 2 superfamilies, 10 families, 2 subfamilies, 56 genera. Three other classes remain elusive: Allogromiata, Astrorhizata, and Textulariata. Four new replacement names are introduced: Leveniranella pro Iranella Leven in Leven and Vaziri Mohaddam, 2004, Tianshanellites pro Triticites (Tianshanella) Da in Da & Sun, 1983, Gublerites pro Gublerina Minato & Honjo, 1959 and Qinglongella pro Qinglongia Zhang & Dong in Xiao et al., 1986. The family Globoendothyridae is formally described as new.

Test structure in some pioneer multichambered Paleozoic foraminifera

Foraminiferal wall microstructures, consistent with the molecular-based high-rank classification, are critical to understanding foraminiferal evolution and advanced taxonomic relationships. Although test structures are well documented for recent, Cenozoic, and some Mesozoic foraminifera, the diagnostic characteristics of Paleozoic taxa are largely unexplored. The majority of calcareous Paleozoic foraminifera have been assigned to the Fusulinata based on questionable homogeneously "microgranular" test wall microstructures, which have never been sufficiently documented for most taxa. We investigated the test structures of exceptionally well-preserved Devonian (Eifelian) Semitextularia thomasi, representing the first calcareous true multichambered (serial) foraminifera, and compared this species with a large fusiform Permian representative of "true" fusulinids (Neoschwagerinidae). The tests of Semitextularia thomasi display lamellar structures that are not observed in any other fossil or recent foraminiferal group. The Paleozoic foraminifera, traditionally referred to one taxon (the class Fusulinata), possess at least three contrasting test wall microstructures, representing separate high-rank taxonomic groups. Fusulinata is most likely a highly polyphyletic group that is in need of taxonomic revision. The term Fusulinata, defined as including all Paleozoic calcareous forms except Miliolida and Lagenata, is not phylogenetically meaningful and should no longer be used or should be restricted to true complex fusulinids with microgranular test structures, which appeared in the Carboniferous.

Unlocking the biomineralization style and affinity of Paleozoic fusulinid foraminifera

Fusulinids are the most diverse, abundant and geographically widespread Paleozoic foraminifera which are widely considered to possess a “homogeneously microgranular” test microstructure composed of subangular grains of several micrometers in size. However, this texture appears to be a diagenetic artifact. Here we describe well-preserved Devonian calcareous fusulinids (Nanicella) from the Holy Cross Mountains (HCM) in central Poland. Foraminifera from Poland in which the primary nature of tests have not been masked by diagenesis are composed of low magnesium calcite spherical grains up to about 100 nanometers in diameter, identical to those observed in Recent and fossil hyaline foraminifera (Rotaliida, Globothalamea). These data call the paradigm of microgranular test microstructure of Foraminifera into question, and suggest a possible phylogenetic relationship between globothalamids and some fusulinids.

THE RESEARCH HISTORY OF PALEOZOIC FORAMINIFERA OF UKRAINE AND THEIR STRATIGRAPHICAL VALUE

In the history of Ukrainian Paleozoic foraminifera research three periods can be clearly defined. First one – the 30’s till the end of the 40’s – beginning of the 50’s of the last century. At this time the research of Late Paleozoic foraminifera of Ukraine and their usage for the purposes of stratigraphy started.The second period is directly associated with the fast growth of drilling activity caused by fossil fuels exploration in the Devonian and Carboniferous deposits. It lasted almost till the end of 90’s of the last century. This period was the most productive for foraminifera and stratigraphic research. It is characterized by construction and ratification of the detailed stratigraphical schemes of the Upper Paleozoic and especially Carboniferous deposits of Donbas, Dnipro-Donetsk, Lviv and Dobrudja Foredeep. In the biostratigraphic part of these schemes foraminifera played the leading role. Significant number of major joint works with description of foraminifera is characteristic of this period.The third period is connected with the substantial diminish of exploration of Upper Paleozoic deposits of Ukraine. This led to the decreasing of research activities on stratigraphy and foraminifera of these rocks. Thus, while at the beginning the number of experts in Paleozoic foraminifera didn’t exceed 7-8 and then grew up to almost 30, at the present time there are no more that 3-4 of them. Biostratigraphic research nowadays is mostly focused on the modernization of existing stratigraphical schemes.

NEW SEM OBSERVATIONS OF KERIOTHECAL WALLS: IMPLICATIONS FOR THE EVOLUTION OF FUSULINIDA

This study presents new scanning electron microscopy (SEM) observations of Paleozoic foraminifera. It focuses especially on the wall of three Fusulinida, Sakmarella moelleri, Paraskinnerella skinneri, and Taiyuanella furoni, that belong to the Schwagerinoidea, which are fusulinids with keriothecal test walls. In addition, Eostaffella sp. is investigated as an example of the microstructure of the microgranular imperforate tectum. The fillings of the keriothecal alveoles of Sakmarella, Paraskinnerella, and Taiyuanella yield diverse, characteristic flower-like structures that indicate a gradual evolution of the microstucture of the tests. Sakmarella and Paraskinnerella have flowers with a narrow center, and Taiyuanella has a larger center. The true keriothecal structure, described, for example, in Triticites, is distinguished from these structures by simply filled alveoles. The term ‘‘anthotheca’’ is introduced for the structure with narrow-centered flowers. It can be distinguished from the large-centered flower structure identified as Zhuang’s (1989) stalactotheca. Following a literature review of previous work on keriothecal structures, several morphofunctional hypotheses are discussed, including the housing of symbiotic algae or cyanobacteria, which leads to the new interpretation that the flowers of the antho- and stalactothecal structures are induced by algal endosymbionts. In addition, we discuss the monophyly of keriothecal fusulinids. The transition from diaphanothecal to keriothecal forms recognized since Thompson (1964) is reinterpreted in terms of relationships with symbiotic algae or cyanobacteria. The Schwagerinoidea constitute an important group in understanding the evolution of larger foraminifera in the late Paleozoic.

DONATION OF AMOCO FOSSIL COLLECTIONS

BP Amoco, plc, recently donated several large fossil collections to a number of North American universities. The donated fossils come from the collections of the former Amoco Production Company, having been assembled and curated by Amoco personnel prior to the December, 1998 merger of British Petroleum with Amoco. The purpose of this announcement is to briefly describe the various collections and identify their recipients. Insofar as the donated fossils now are housed in public institutions, they and associated records are accessible to the greater scientific community. We encourage the use of these fossils in scholarly research. The donated fossils include sizable collections of conodonts, Paleozoic foraminifera (thin sections), palynomorphs, calcareous nannoplankton, Mesozoic-Cenozoic foraminifera (picked slides), and megafossils, with subordinate numbers of diatoms, radiolaria, and ostracods. The bulk of the donated material is from surface locations and research boreholes (e.g., JOIDES, DSDP, ODP, state and federal survey cores), whereas most specimens from oil and gas wells have been retained to protect confidentiality and competitive advantage. The donated fossil collections are accompanied by two types of paper records, as follows: #### Taxon folders Within the former Amoco nomenclatural system, each taxon was assigned a unique number to facilitate record keeping and the digital manipulation of biostratigraphic data. The morphologic concept behind each unique taxon, whether an informal Amoco entity or a validly published name, is anchored by taxonomic information contained within a taxon folder. Such information typically includes a taxonomic description, illustrations, and reference to an Amoco …

A MEMORIAL TO DAGMARA MAKSIMILIANOVNA RAUZER-CHERNOUSOVA

Research Article| April 01, 2000 A MEMORIAL TO DAGMARA MAKSIMILIANOVNA RAUZER-CHERNOUSOVA Charles A. Ross; Charles A. Ross 1Department of Geology, MS 9080, Western Washington University, Bellingham, WA 98225. Search for other works by this author on: GSW Google Scholar Paul L. Brenckle Paul L. Brenckle 2Whistler Point Road. Westport, MA 02790. Search for other works by this author on: GSW Google Scholar Author and Article Information Charles A. Ross 1Department of Geology, MS 9080, Western Washington University, Bellingham, WA 98225. Paul L. Brenckle 2Whistler Point Road. Westport, MA 02790. Publisher: Cushman Foundation for Foraminiferal Research First Online: 03 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2000 Journal of Foraminiferal Research Journal of Foraminiferal Research (2000) 30 (2): 81–82. https://doi.org/10.2113/0300081 Article history First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Charles A. Ross, Paul L. Brenckle; A MEMORIAL TO DAGMARA MAKSIMILIANOVNA RAUZER-CHERNOUSOVA. Journal of Foraminiferal Research 2000;; 30 (2): 81–82. doi: https://doi.org/10.2113/0300081 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search Dagmara Maksimilianovna Rauzer-Chernousova, The Joseph A. Cushman Awardee for 1985, passed away on June 12, 1995 at the age of 101. She was an outstanding micropaleontologist, Professor of the Russian Academy of Sciences, Honorable Soros Professor, Sci. D. in Geology and Mineralogy, and was internationaly known for her studies of late Paleozoic Foraminifera. She also received the ‘Fighting Order of the Red Star’, the ‘A. P. Karpinski Medal’, the ‘Lenin Medal’, and the ‘Red Star for Labor’. Dr. Rauzer-Chernousova graduated in 1918 from the St. Petersburg Higher School for Girl Students where she majored in Geology. She joined a geological... You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Classification of small (non-endothyrid) Paleozoic foraminifera as a class, with ranges of the genera

Other| October 01, 1994 Classification of small (non-endothyrid) Paleozoic foraminifera as a class, with ranges of the genera Charles A. Ross Charles A. Ross GeoBioStrat, Bellingham, WA, United States Search for other works by this author on: GSW Google Scholar Journal of Foraminiferal Research (1994) 24 (4): 305–311. https://doi.org/10.2113/gsjfr.24.4.305 Article history first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Charles A. Ross; Classification of small (non-endothyrid) Paleozoic foraminifera as a class, with ranges of the genera. Journal of Foraminiferal Research 1994;; 24 (4): 305–311. doi: https://doi.org/10.2113/gsjfr.24.4.305 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

The taxonomic status of two Paleozoic foraminiferal genera from the Russian platform

Zadorozhnyi and Yuferev (1984) presented a systematic account of Russian platform Paleozoic foraminifera. They documented 19 genera and subgenera of which five genera and four subgenera were established as new taxa. Two of the new genera require that their systematic status be correctly defined and this is done herein.

Late Paleozoic Foraminifera as Depth Indicators: ABSTRACT

Many late Paleozoic foraminifera consistently occur in particular rock types for which depths of deposition may be inferred. A few genera appear randomly in many different rock types and were possibly pelagic. Textulariina: In the Ammodiscacea, most genera of Hippocrepininae (Astrorhizidae) and Ammodiscidae are widespread and End_Page 542------------------------------ common in dark gray shales, siltstones, fine to very fine sandstones, and silty, calcareous mudstones deposited in basinal, slope, and deeper shelf setting below effective wave base. In the Lituolacea, the Hormosinidae, Lituolidae, Textulariidae, Trochamminidae, and Ataxophragmiidae include only a few late Paleozoic genera, which locally are abundant in dark to medium gray, silty shales, siltstones, silty sandstones, and carbonate wackestones and packstones; all deposited near wave base. Miliolina: Late Paleozoic representatives are primitive (tubular, nonseptate) genera of Hemigordiopsidae, Fischerinidae, and Nubeculariidae. These occur mainly in shallow, warm water calcareous wackestones. Fusulinina: These were the most taxonomically diverse of the late Paleozoic foraminifera and were adapted to a wide range of depth habitats. Parathuramminacea locally were very abundant in deeper water, dark gray calcareous wackestones formed in basins and slopes below wave base. Endothyracea (s.l.) included many genera and families that dominated most of the Early Carboniferous shallow water, calcareous depositional environments. Nodosinellidae preferred open shelf facies and may have extended to depths below wave base. Colaniellidae, Ptychocladiidae, Paleotextulariidae, Tetrataxidae, Tournayellidae, Endothyridae, Loeblichiidae, and Lasiodiscidae locally were common in shallow shelf, shoal, and lagoonal carbonate wackestones, packstones, and as displaced fossils in some grainstones, uch as oolites. Bradyinidae were globose, had pseudoalveolar walls, and were widely scattered in a number of different lithologies suggesting a pelagic or planktonic habitat. Archaediscidae, which have recrystallized wall structure, were common in shallow water, carbonates and calcareous shales. Fusulinacea, most of which probably had photosynthetic symbionts, were adapted to shallow carbonate depositional habitat at depths less than 15 to 20 m (49 to 66 ft). Carboniferous Fusulinidae and Ozawainellidae apparently occupied most of this depth range because of their adaptation to Middle Carboniferous cool surface waters. Permian Schubertellidae and Oazawainellidae became adapted to shallow, warm water lagoons and shelves. Verbeekinidae and Neoschwagerinidae were common in reef cores and upper flank deposits of Permian Tethyan reefs. Schwagerinidae also adapted to shallow to very shallow water carbonate environments, such as reef edges, shallow lagoons, tidal flat channels, margins of algal shoals and banks, and other shallow nearshore areas. For example, Eoparafusulina formed e tensive skeletal grainstones in many cross-bedded, subtidal deposits. Several globose lineages within the Fusulinacea possibly were pelagic, such as Robustoschwagerina, Pseudoschwagerina, Verbeekina, and many of the Permian Staffellidae. End_of_Article - Last_Page 543------------

Ocorrências de Foraminíferos Fósseis no Brasil

São descritos pela primeira vez alguns foraminiferos fósseis do Brasil. O artigo inicia com um breve apanhado das informações pré¬ vias sobre ocorrências de foraminiferos fósseis do Brasil. Discute-se material com foraminiferos procedente de Caraparú, Estado do Pará, provavelmente referivel à formação Pirabas de idade miocenica. Não foram atingidas, porém, determinações sistemáticas. Segue-se a descrição de alguns foraminiferos do Paleozoico Superior, procedentes do Rio Parauarí (formação Itaituba). dentre os quais foram genericamente reconhecidos Endothyra e Plectogyra. São considerados, então, foraminiferos cretácicos vindos do Rio Gramane, Estado de Paraiba do Norte e Ponta dos Barcos, Estado de Sergipe. Detem-se o autor mais demoradamente sobre fósseis coletados na Ponta de Pirabas (formação P irabas), cuja idade é considerada miocenica. Descreve: Quinqueloculina sp. a, Q. sp. b., Q. sp. c, Pytgo sp. a, P. sp. b., Peneroplis sp., Discovbis? sp.., “Rotalia ’ sp., Gyroidina? sp., Eponides sp., Nonion sp. a, N . sp. b