scholarly journals The hyaenodonts (Mammalia) from the French locality of Aumelas (Hérault), with possible new representatives from the late Ypresian

Geodiversitas ◽  
2020 ◽  
Vol 42 (13) ◽  
pp. 185 ◽  
Author(s):  
Floréal Solé ◽  
Bernard Marandat ◽  
Fabrice Lihoreau
Keyword(s):  
Late Ypresian

scholarly journals New nummulite (Foraminiferida) species from the Eocene of Northern Oman

1992 ◽  
Vol 11 (2) ◽  
pp. 189-195 ◽  
Author(s):  
Andrew Racey
Keyword(s):  
New Species ◽  
Test Size ◽  
Three New Species ◽  
Late Ypresian

Abstract. Three new species of nummulites; Nummulites minutus sp. nov., N. omanensis sp. nov. and N. schaubi sp. nov., are described and illustrated from the Eocene of Northern Oman. N. omanensis sp. nov. and N. schaubi sp. nov. are shown to range from Early to Middle Lutetian whilst N. minutus sp. nov. ranges from Late Ypresian to Early Lutetian. N. minutus sp. nov. is far smaller in all major dimensions than any species of Nummulites previously described and if found in isolation would be assumed to be very primitive and probably dated as Late Palaeocene. However, N. minutus sp. nov. was found in association with an unreworked Lutetian fauna. The commonly held belief that proloculus size and test size are smallest in the most primitive (i.e. oldest) species must therefore be treated with some degree of caution.

scholarly journals Tetraliidae and Trapeziidae (Crustacea, Decapoda, Brachyura) from the Early Eocene of Monte Magrè (Vicenza, NE Italy)

2013 ◽  
Vol 154 (1) ◽  
pp. 25
Author(s):  
Antonio De Angeli ◽  
Loris Ceccon
Keyword(s):  
Fossil Record ◽  
Early Eocene ◽  
Decapod Crustaceans ◽  
Ne Italy ◽  
Late Ypresian

The decapod crustaceans of the families Tetraliidae and Trapeziidae from the Early Eocene (middle-late Ypresian) of Monte Magrè (Schio, Vicenza, NE Italy), are described. The specimens are assigned to <em>Eurotetralia loerenthey</em> (Müller, 1975) n. gen., <em>Tetralia vicetina</em> n. sp. (Tetraliidae Castro, Ng &amp; Ahyong, 2004); <em>Archaeotetra lessinea</em> n. sp., <em>Eomaldivia trispinosa</em> Müller &amp; Collins, 1991, <em>Paratetralia convexa</em> Beschin, Busulini, De Angeli &amp; Tessier, 2007, and <em>Paratetralia sulcata</em> n. sp. (Trapeziidae Miers, 1886).<br />The specimens were discovered associated with other decapods, in the coral-rich limestone. This report is the oldest fossil record of both two families. The stratigraphical distribution of the Tetraliidae and Trapeziidae is extended back to the middle-late Ypresian.

scholarly journals A study of the sharks and rays from the Lillebælt Clay (Early–Middle Eocene) of Denmark, and their palaeoecology

2014 ◽  
Vol 62 ◽  
pp. 39-88
Author(s):  
Agnete Weinreich Carlsen ◽  
Gilles Cuny
Keyword(s):  
Water Depth ◽  
Middle Eocene ◽  
Water Environment ◽  
Outer Continental Shelf ◽  
Stratigraphic Record ◽  
Clay Formation ◽  
First Time ◽  
Fish Otoliths ◽  
Late Ypresian ◽  
Upper Slope

Elasmobranch assemblages from the Eocene Lillebælt Clay Formation (Late Ypresian to Middle Lutetian) at Trelde Næs in Denmark yielded teeth of 31 different genera/species from surface collecting as well as from bulk sampling. The fauna is dominated by lamniform pelagic sharks and deepwater genera like Hexanchiformes, Centrophorus, Isistius, Echinorhinus and Pristiophorus. Coupatezia miretrainensis, Centrophorus aff. granulosus and Chlamydoselachus cf. fiedleri are reported for the first time from the Ypresian. The record of Coupatezia miretrainensis extends its stratigraphic record from the Lutetian back to the Late Ypresian, whereas the record of Centrophorus aff. granulosus extends the origin of the Centrophorus granulosus group back to the Late Ypresian from its hitherto known origin in the Lutetian. The possible presence of the sparsely known Bartonian genus Turania awaits further sampling to be confirmed. The Ichthyofauna suggests deposition in a deep-water environment in subtropical to temperate waters on the middle or outer continental shelf and upper slope at water depth down to 350 m. This is in agreement with depositional depths inferred from fossil molluscs and fish otoliths from Trelde Næs.

scholarly journals Palynological characteristics of the Eocene–Early Miocene of Kvachina Bay, Western Kamchatka

2019 ◽  
Vol 27 (3) ◽  
pp. 93-122
Author(s):  
G. N. Aleksandrova
Keyword(s):  
Early Miocene ◽  
Ecological Groups ◽  
Spores And Pollen ◽  
Time Intervals ◽  
Western Kamchatka ◽  
Marine Strata ◽  
Late Ypresian

As a result of studying the stratigraphic distribution of palynomorphs in the Cenozoic marine strata of the Kvachina Bay section, six different age associations of dinocysts, spores, and pollen have been identified. Their analysis made it possible to date the deposits of the Tigil Unit by the Bartonian–Pribonian, the Belesovataya Unit – by the Oligocene–Early Miocene, and the overlying lower part of the Kavranian Series – by the Early Miocene. The age of the dislocated rocks underlying the Tigil Unit is estimated as Late Ypresian–(?) Early Lutetian. On the basis of the revealed changes in the ratios of the ecological groups of palynomorphs, conclusions were made about the paleoenvironmental in which the formation of strata took place in various time intervals.

scholarly journals Taxonomy and biostratigraphy of the elasmobranchs and bony fishes (Chondrichthyes and Osteichthyes) of the lower-to-middle Eocene (Ypresian to Bartonian) Claiborne Group in Alabama, USA, including an analysis of otoliths

2019 ◽  
Author(s):  
Jun A. Ebersole ◽  
David J. Cicimurri ◽  
Gary L. Stringer
Keyword(s):  
North American ◽  
Middle Eocene ◽  
Bony Fish ◽  
Fish Diversity ◽  
Gulf Coastal Plain ◽  
Bony Fishes ◽  
Lithostratigraphic Units ◽  
History Of ◽  
One New Species ◽  
Late Ypresian

The Tallahatta Formation, Lisbon Formation, and Gosport Sand are the three lithostratigraphic units that make up the lower-to-middle Eocene Claiborne Group. In Alabama, these marine units are among the most fossiliferous in the state and a long history of scattered reports have attempted to document their fossil diversity. In this study, we examined 20931 elasmobranch and bony fish elements, including otoliths, derived from Claiborne Group units in Alabama and identified 115 unequivocal taxa. Among the taxa identified, one new species is described, Carcharhinus mancinae sp. nov., and Pseudabdounia gen. nov. is a new genus erected to include two species formerly placed within Abdounia Capatta, 1980. New taxonomic combinations proposed include Pseudabdounia claibornensis (White, 1956) gen. et comb. nov., Pseudabdounia recticona (Winkler, 1874) gen. et comb. nov., Physogaleus alabamensis (Leriche, 1942) comb. nov., and Eutrichiurides plicidens (Arambourg, 1952) comb. nov. We also report the first North American paleobiogeographic occurrences of Aturobatis aff. A. aquensis Adnet, 2006, Brachycarcharias atlasi (Arambourg, 1952), Eutrichiurides plicidens comb. nov., Galeorhinus louisi Adnet & Cappetta, 2008, Ginglymostoma maroccanum Noubhani & Cappetta, 1997, Gymnosarda sp., Mennerotodus sp., Rhizoprionodon ganntourensis (Arambourg, 1952), Stenoscyllium aff. S. priemi Noubhani & Cappetta, 1997, Trichiurus oshosunensis White, 1926, and the first North American occurrence for a fossil member of the Balistidae Risso, 1810. Our sample also included 26 taxa that represented first paleobiogeographic occurrences for Alabama, including Abdounia beaugei (Arambourg, 1935), Albula eppsi White, 1931, Ariosoma nonsector Nolf & Stringer, 2003, Anisotremus? sp., Anomotodon sp., Brachycarcharias twiggsensis (Case, 1981), Burnhamia daviesi (Woodward, 1889), Eoplinthicus yazooensis Capetta & Stringer, 2002, Galeorhinus ypresiensis (Casier, 1946), Gnathophis meridies (Frizzell & Lamber, 1962), Haemulon? obliquus (Müller, 1999), Hypolophodon sylvestris (White, 1931), Malacanthus? sulcatus (Koken, 1888), Meridiania cf. M. convexa Case, 1994, Palaeocybium proosti (Storms, 1897), Paraconger sector (Koken, 1888), Paralbula aff. P. marylandica Blake, 1940, Phyllodus toliapicus Agassiz, 1844, Propristis schweinfurthi Dames, 1883, Pycnodus sp., Pythonichthys colei (Müller, 1999), Scomberomorus stormsi (Leriche, 1905), Signata stenzeli Frizzell & Dante, 1965, and Signata nicoli Frizzell & Dante, 1965, and the first Paleogene occurrences in Alabama of a member of the Gobiidae Cuvier, 1816. A biostratigraphic analysis of our sample showed stratigraphic range extensions for several taxa, including the first Bartonian occurrences of Eoplinthicus yazooensis, Jacquhermania duponti (Winkler, 1876), Meridiania cf. M. convexa, Phyllodus toliapicus, and “Rhinobatos” bruxelliensis (Jaekel, 1894), range extensions into the late Ypresian and Bartonian for Tethylamna dunni Cappetta & Case, 2016 and Scoliodon conecuhensis Cappetta & Case, 2016, the first late Ypresian records of Galeorhinus louisi, the first Lutetian occurrence of Gymnosarda Gill, 1862, and a range extension for Fisherichthys aff. F. folmeri Weems, 1999 into the middle Bartonian. Larger biostratigraphic and evolutionary trends are also documented, such as the acquisition of serrations in Otodus spp., possible population increases for the Rhinopterinae Jordan & Evermann, 1896 and Carcharhiniformes Compagno, 1973 in the Bartonian, and the apparent diversification of the Tetraodontiformes Berg, 1940 during the same stage. This study helps better our understanding of early-to-middle Eocene elasmobranch and bony fish diversity, paleobiogeography, and biostratigraphy in the Gulf Coastal Plain of North America.

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