scholarly journals The Danian-Selandian boundary at Svejstrup with remarks on the biostratigraphy of the boundary in western Denmark

1985 ◽  
Vol 33 ◽  
pp. 341-362
Author(s):  
E. Thomsen ◽  
C. Heilmann Clausen
Keyword(s):  
New Species ◽  
Calcareous Nannofossils ◽  
Two New Species ◽  
Different Ages ◽  
Facies Change

The Danian-Selandian boundary at Svejstrup is characterized by an abrupt facies change from a pure li­mestone to a terrigeneous marl. The top of the Danian limestone is an intensively burrowed abrasion sur­face. The Sel:indian deposits are initiated by a conglomerate of glauconitized and phosphatized limestone pebbles. Although the boundary at Svejstrup is very similar to the nearby section at Hvalklse, the time in­terval included in the hiatus at Svejstrup is greater than at Hvall0se. The coccoliths and dinoflagellates in­dicate different ages for the top of the Danian. It is also shown that the Danian sequences in the Harre and the Viborg 1 borings include strata younger than in any previously described Danian sections. At both of these localities a number of coccoliths and a dinoflagellate, Spinidinium densispinatum, hitherto only re­corded from the Selandian, occur in the Danian limestone. The top of the Danian at Harre and Viborg 1 is of upper NP4 or lower NP5 age. The calcareous nannofossils of the lower Selandian are completely domi­nated by reworked Cretaceous forms, whereas reworked dinoflagellates are extremely rare. This dif­ference is probably due to oxidation of the Cretaceous dinoflagellates during reworking. Two new species of dinoflagellates from the Paleocene are described.

scholarly journals Albian calcareous nannofossils from the Gault Clay of Munday’s Hill (Bedfordshire, England)

1991 ◽  
Vol 10 (2) ◽  
pp. 203-221 ◽  
Author(s):  
Jason A. Crux
Keyword(s):  
New Species ◽  
High Latitude ◽  
Lower Half ◽  
Calcareous Nannofossils ◽  
New Genera ◽  
Low Latitude ◽  
North West ◽  
Two New Species ◽  
Hill Area ◽  
West European

Abstract. Abundant and diverse Middle and Upper Albian nannofossil assemblages are present in the Gault Clay exposed at Munday’s Hill, Bedfordshire, England. The section was deposited between the first appearance datums of Tranolithus orionatus and Eiffellithus turriseiffeli. This interval can be further subdivided, using the last appearance of Braloweria boletiformis and the first appearances of Axopodorhabdus albianus, Owenia hilli sp. nov. and Eiffellithus monechiae sp. nov.The presence of Braloweria boletiformis, Ceratolithina hamata and Gaarderella granulifera, only at this and other north-west European localities, defines a unique endemic nannofloral province. Low latitude species are present throughout the studied section and first and last appearance datums of species are nearly synchronous, both at Munday’s Hill and in other areas. This indicates continuous marine connections between Munday’s Hill and low latitude areas through the Mid and Late Albian.Abundance patterns of high latitude nannofossils, primarily Repagulum parvidentatum and Seribiscutum primitivum, suggest that relatively cold waters dominated in the Munday’s Hill area near the base of the Middle Albian. The abundance of high latitude taxa gradually decreased towards the end of the Middle Albian, but temporarily increased at the base of the Upper Albian. The abundance of high latitude taxa was relatively low throughout the lower half of the Upper Albian and intermediate to low in the upper half of the Upper Albian.Two new genera, Braloweria gen. nov. and Owenia gen. nov., and two new species, Owenia hilli sp. nov. and Eiffellithus monechiae sp. nov., are described.

A Synopsis of Dicliptera (Acanthaceae) in Brazil, with the Description of Two New Species

2020 ◽  
Vol 45 (2) ◽  
pp. 340-348
Author(s):  
James Lucas da Costa-Lima ◽  
Earl Celestino de Oliveira Chagas
Keyword(s):  
New Species ◽  
South America ◽  
The State ◽  
Northeastern Brazil ◽  
Mato Grosso ◽  
The North ◽  
New Synonyms ◽  
Two New Species ◽  
Mato Grosso Do Sul ◽  
A New Species

Abstract—A synopsis of Dicliptera (Acanthaceae) for Brazil is presented. Six species are recognized: Dicliptera ciliaris, D. sexangularis, and D. squarrosa, widely distributed in South America; D. purpurascens, which ranges from the North Region of Brazil (in the state of Acre) to eastern Bolivia; D. gracilirama, a new species from the Atlantic Forest of northeastern Brazil; and D. granchaquenha, a new species recorded in dry and semideciduous forests in Bolivia and western Brazil, in the state of Mato Grosso do Sul. Furthermore, we propose new synonyms and designate lectotypes for eleven names. An identification key to the six accepted Dicliptera species in Brazil is provided.

Two New Species of Aira (Poaceae) from the Iberian Peninsula and the Balearic Islands

2020 ◽  
Vol 45 (1) ◽  
pp. 75-84
Author(s):  
Llorenç Sáez ◽  
Javier López-Alvarado ◽  
Pere Fraga ◽  
Regina Berjano ◽  
M. Ángeles Ortiz ◽  
...  
Keyword(s):  
Risk Assessment ◽  
New Species ◽  
Iberian Peninsula ◽  
Diploid Species ◽  
Balearic Islands ◽  
Similar Species ◽  
Chromosome Counts ◽  
Two New Species

Abstract—Two new diploid species, Aira minoricensis and Aira hercynica, are described and illustrated, along with chromosome counts, risk assessment, distribution and habitat, phenology, and comparisons with morphologically similar species. A comparative table and a key for the species of Aira for the Iberian Peninsula and the Balearic Islands are provided to assist in the identification of these overlooked species, and their relationships to other taxa are discussed.

Palaeontology, taxonomic revision and variability of some species of the genus Gassendiceras Bert et al., 2006 (Ammonitina, Upper Barremian) from southeastern Franc

2013 ◽  
Vol 63 (3) ◽  
pp. 355-429 ◽  
Author(s):  
Didier Bert ◽  
Stéphane Bersac ◽  
Gérard Delanoy ◽  
Léon Canut
Keyword(s):  
New Species ◽  
Intraspecific Variability ◽  
Taxonomic Revision ◽  
Two New Species

Abstract Bed-by-bed sampling of twelve Barremian sections in southeastern France from pelagic basin (Vocontian Basin) to neritic platforms (Arc of Castellane, Arc of Nice and Provencal Domain) has enabled the collection of isochronous samples of the ammonite genus Gassendiceras. Three poorly known species of the Toxancyloceras vandenheckei Zone (Upper Barremian) are revised: G. alpinum, G. multicostatum and G. hoheneggeri; two new species are described (G. rebouleti nov. sp. and G. bosellii nov. sp.). The intraspecific variability of particular species was recognised. This variability is between slender peramorphic and robust paedomorphic extreme morphologies, with the presence of all intermediates.

New orchid species (Orchidaceae) in the flora of Laos

2019 ◽  
pp. 25-40
Author(s):  
L. V. Averyanov ◽  
Khang Sinh Nguyen ◽  
T. V. Maisak ◽  
Hiep Tien Nguyen ◽  
N. L. Orlov ◽  
...  
Keyword(s):  
New Species ◽  
Related Species ◽  
Field Studies ◽  
Regional Literature ◽  
Orchid Species ◽  
Two New Species

This paper continues the publication of new data obtained during field studies in remote and poorly studied regions of Laos in 2015–2018. It provides descriptions of two new species (Bulbophyllum brachyscapum Aver. and Sunipia saccata Aver.), emended descriptions of two previously published but insufficiently known species (Cleisostoma verrucosum Aver., Oberonia vesiculifera Aver.) and reports of eight species newly recorded in the flora of Laos (Biermannia calcarata Aver., Bulbophyllum farreri (W. W. Sm.) Seidenf., Didymoplexiella trichechus (J. J. Sm.) Garay, Eria eriopsidobulbon C. S. P. Parish et Rchb. fil., Habenaria ciliolaris Kraenzl., Liparis caudata Aver. et K. S. Nguyen, Odontochilus umbrosus (Aver.) Ormerod, and Porpax ustulata (C. S. P. Parish et Rchb. fil.) Rolfe). Appropriate citations of regional literature, colour illustrations, data on types and distribution, descriptions, etymology, as well as notes on taxonomy and related species are provided for the studied species.

Two new species of the genus Baetis Leach, 1815 (Ephemeroptera: Baetidae) from Cyprus

2008 ◽  
Vol 58 (1) ◽  
pp. 79-104 ◽  
Author(s):  
Tomáš Soldán ◽  
Roman J. Godunko
Keyword(s):  
New Species ◽  
Two New Species
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