Nielsenicrinus japonicus new species (Echinodermata: Crinoidea) from the Late Cretaceous of Japan and its paleobiogeographic implications

1996 ◽  
Vol 70 (6) ◽  
pp. 964-968 ◽  
Author(s):  
Tatsuo Oji ◽  
Manabu Kanoh ◽  
Seiichi Toshimitsu ◽  
Masayuki Tashiro
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Early Cretaceous ◽  
Late Cretaceous

A new isocrinine species, Nielsenicrinus japonicus, is described from the Maastrichtian of western Kyushu, Japan. This is the first confirmed occurrence of this genus outside Europe. Three isocrinine genera, Nielsenicrinus, Cainocrinus, and Teliocrinus, have a common arrangement of ligamentary articulations in the primibrachials and secundibrachials. These taxa possibly constitute a single lineage since the Early Cretaceous through the Recent, and they were known only from Eurasia, or from Indian Ocean (Teliocrinus).

Ginkgophytes of the Ul’ya flora (the Ul’ya depresiion, the Okhotsk-Chukotka volcanogenic belt)

Palaeobotany ◽  
2016 ◽  
Vol 7 ◽  
pp. 80-95 ◽  
Author(s):  
L. B. Golovneva
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Middle Part ◽  
Leaf Length ◽  
Volcanogenic Belt ◽  
Short Shoots ◽  
Volcanogenic Deposits

The Ul’ya flora comes from the Coniacian volcanogenic deposits of the Amka Formation (the Ul'ya depression, southern part of the Okhotsk-Chukotka volcanogenic belt). Ginkgoaleans are diverse in this flora and represented by three genera: Ginkgo, Sphenobaiera and Baiera. All specimens have no cuticle and were assigned to morphotaxa. Genus Ginkgo includes two species: G. ex gr. adiantoides (Ung.) Heer with entire leaves and G. ex gr. sibirica Heer with dissected leaves. Genus Sphenobaiera also consists of two species: S. ex gr. longifolia (Pom.) Florin with 4–8 leaf lobes and S. ex gr. biloba Prynada with two leaf lobes. Genus Baiera is represented by new species B. lebedevii Golovn., sp. nov.Leaves of this species are 25–30 cm long and 13–16 cm wide, narrowly wedge-shaped with flat slender petiole, dichotomously dissected 4–5 times into linear segments 3–6 mm wide with 6–12 veins. The length of ultimate segments is equal to about a half of leaf length. Leaves attached spirally to ovoid short shoots about 2 cm long. Among the Late Cretaceous floras similar diversity of ginkgoaleans was recorded only in the Turonian-Coniacian Arman flora from middle part of the Okhotsk-Chukotka volcanogenic belt (Herman et al., 2016). Four species of ginkgoaleans from the Ul’ya flora (except G. ex gr. adiantoides) are considered as the Early Cretaceous relicts.

scholarly journals A new ornithurine from the Early Cretaceous of China sheds light on the evolution of early ecological and cranial diversity in birds

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1765 ◽  
Author(s):  
Jiandong Huang ◽  
Xia Wang ◽  
Yuanchao Hu ◽  
Jia Liu ◽  
Jennifer A. Peteya ◽  
...  
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Late Jurassic ◽  
Northeastern China ◽  
Avian Ecology ◽  
Developmental Shift ◽  
Cranial Ontogeny ◽  
Close Relatives

Despite the increasing number of exceptional feathered fossils discovered in the Late Jurassic and Cretaceous of northeastern China, representatives of Ornithurae, a clade that includes comparatively-close relatives of crown clade Aves (extant birds) and that clade, are still comparatively rare. Here, we report a new ornithurine speciesChangzuiornis ahgmifrom the Early Cretaceous Jiufotang Formation. The new species shows an extremely elongate rostrum so far unknown in basal ornithurines and changes our understanding of the evolution of aspects of extant avian ecology and cranial evolution. Most of this elongate rostrum inChangzuiornis ahgmiis made up of maxilla, a characteristic not present in the avian crown clade in which most of the rostrum and nearly the entire facial margin is made up by premaxilla. The only other avialans known to exhibit an elongate rostrum with the facial margin comprised primarily of maxilla are derived ornithurines previously placed phylogenetically as among the closest outgroups to the avian crown clade as well as one derived enantiornithine clade. We find that, consistent with a proposed developmental shift in cranial ontogeny late in avialan evolution, that this elongate rostrum is achieved through elongation of the maxilla while the premaxilla remains only a small part of rostral length. Thus, only in Late Cretaceous ornithurine taxa does the premaxilla begin to play a larger role. The rostral and postcranial proportions ofChangzuiornissuggest an ecology not previously reported in Ornithurae; the only other species with an elongate rostrum are two marine Late Cretacous taxa interpreted as showing a derived picivorous diet.

New anaxyelids (Hymenoptera: Anaxyelidae) from the Cretaceous of Asia

Zootaxa ◽  
2019 ◽  
Vol 4603 (2) ◽  
pp. 341 ◽  
Author(s):  
DMITRY S. KOPYLOV
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
New Genera ◽  
The World

Four new genera and five new species of anaxyelids are described from the Cretaceous of Asia: Mangus magnus gen. et sp. nov. from the Aptian of Mongolia (Bon-Tsagan), Urosyntexis undosa sp. nov., Parasyntexis khasurtensis gen. et sp. nov., both from the Early Cretaceous of Transbaikalia (Khasurty), Dolichosyntexis transbaikalicus gen. et sp. nov. from the Hauterivian–Barremian of Transbaikalia (Baissa), and Curiosyntexis magadanicus gen. et sp. nov. from the mid-Upper Cretaceous of NE Siberia (Obeshchayushchiy). Early Cretaceous is the time of the highest diversity of Anaxyelidae. In this epoch these sawflies are represented with all four subfamilies comprising the group. In Late Cretaceous anaxyelid diversity and abundance rapidly decrease and they are represented with the only subfamily Syntexinae. The anaxyelid collection of Palaeontological Institute (Moscow), the most representative collection of fossil anaxyelids in the world, has been completely revised, identified and described. The list of identifications is provided.

scholarly journals The earliest mammal of the European Paleocene: The multituberculateHainina

2000 ◽  
Vol 74 (4) ◽  
pp. 701-711 ◽  
Author(s):  
P. Peláez-Campomanes ◽  
N. López-Martínez ◽  
M.A. Álvarez-Sierra ◽  
R. Daams
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Mass Extinction ◽  
Late Paleocene ◽  
The Family ◽  
Extinction Event ◽  
Masticatory System ◽  
Mass Extinction Event ◽  
A New Species

A new species of multituberculate mammal,Hainina pyrenaican. sp. is described from Fontllonga-3 (Tremp Basin, Southern Pyrenees, Spain), correlated to the later part of chron C29r just above the K/T boundary. This taxon represents the earliest European Tertiary mammal recovered so far, and is related to otherHaininaspecies from the European Paleocene. A revision of the species ofHaininaallows recognition of a new species,H. vianeyaen. sp. from the Late Paleocene of Cernay (France). The genus is included in the family Kogaionidae Rãdulescu and Samson, 1996 from the Late Cretaceous of Romania on the basis of unique dental characters. The Kogaionidae had a peculiar masticatory system with a large, blade-like lower p4, similar to that of advanced Ptilodontoidea, but occluding against two small upper premolars, interpreted as P4 and P5, instead of a large upper P4. The endemic European Kogaionidae derive from an Early Cretaceous group with five premolars, and evolved during the Late Cretaceous and Paleocene. The genusHaininarepresents a European multituberculate family that survived the K/T boundary mass extinction event.

A new asteroid (Echinodermata) faunule from the Early Cretaceous (Barremian) of Morocco

2011 ◽  
Vol 85 (6) ◽  
pp. 1021-1034 ◽  
Author(s):  
Daniel B. Blake ◽  
Roland Reboul
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Deep Water ◽  
Small Specimen ◽  
Northwest Africa ◽  
The Pacific ◽  
The Family ◽  
Morphologic Evolution ◽  
The Pacific Ocean

An asteroid (Echinodermata) faunule of four taxa representing three surviving families and a probable fourth is described from the Barremian (Early Cretaceous) of Morocco, northwest Africa. The four together suggest limited morphologic evolution since the Cretaceous but biogeographic and depth patterns have changed. Marocaster coronatus n. gen. n. sp. (Valvatida, Goniasteridae) combines apparent derived features of the dorsal disk and superomarginal shape with more stemward expressions of the abactinal ossicles. Betelgeusia orientalis n. sp. is a fourth Mesozoic occurrence of the Radiasteridae (Paxillosida), the new species similar to earlier occurrences from the Middle Jurassic of India, the Early Cretaceous of Texas, and the Late Cretaceous of Europe. Reported modern occurrences of the family are few, widely scattered, and limited to deeper water; the extinct species together testify to a once-broader familial distribution. Dipsacaster africanus n. sp., a member of the Astropectinidae (Paxillosida), is remarkably similar to extant congeners. Dipsacaster today is widely distributed in the Pacific Ocean but occurrences in the Atlantic are few. Because of preservation, a single small specimen of the Zoroasteridae? (Forcipulatida) cannot be identified with certainty. Extant zoroasterids are deep-water in distribution, although shallow-water Eocene representatives are known.

A new species of Sorbinichthys (Teleostei: Clupeomorpha: Ellimmichthyiformes) from the Late Cretaceous of Morocco

2011 ◽  
Vol 48 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Alison M. Murray ◽  
Mark V.H. Wilson
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Type Species ◽  
Eastern Mediterranean ◽  
Marine Species ◽  
Western Tethys ◽  
Eastern Morocco ◽  
A New Species

A new species of ellimmichthyiform fish, represented by three specimens, has been recovered from deposits of the Akrabou Formation of Morocco. The new species is described in the existing genus Sorbinichthys , family Sorbinichthyidae, as Sorbinichthys africanus , sp. nov., closely related to the type species Sorbinichthys elusivo . The Ellimmichthyiformes is an extinct order of clupeomorph fishes that includes both freshwater and marine species ranging from the Early Cretaceous through the Eocene. Sorbinichthys elusivo is known from Cenomanian deposits of the eastern Mediterranean Tethys (Lebanon), whereas the new species is possibly early Turonian but more probably late Cenomanian in age, from the western Tethys (eastern Morocco). At lower taxonomic levels, the assemblage from the Akrabou Formation has a primarily Tethyan composition, exemplified by the genus Sorbinichthys, whereas supra-generic taxa found there include groups with trans-Atlantic (e.g., Sorbinichthyidae, Macrosemiidae) or near-cosmopolitan (e.g., Paraclupeidae) distributions.

New Neritidae from southwestern North America

1986 ◽  
Vol 60 (3) ◽  
pp. 636-655 ◽  
Author(s):  
Alan J. Cushing Woods ◽  
L. R. Saul
Keyword(s):  
New Species ◽  
North America ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Baja California ◽  
Middle Eocene ◽  
Type Locality ◽  
Early Tertiary ◽  
Molluscan Fauna ◽  
A New Species

In southwestern Baja California Norte a new species of Early Tertiary Tethyan gastropod, Velates, V. vizcainoensis n. sp., occurs with a previously unknown intertidal molluscan fauna suggestive of an unprotected coastline of probable Paleocene age. Comparison of Velates vizcainoensis n. sp. to other forms previously assigned to Velates from southwestern North America suggests that “Nerita” cuneata Gabb of Late Cretaceous age probably belongs in Neritina (Dostia), as do N. (D.) aff. N. (D.) cuneata and N. (D.) escondita n. sp.Velates is probably derived from typical Otostoma and is an early Tertiary genus. Velates californicus Vokes, although originally described as being from the Llajas Formation of middle Eocene age, is from the upper Santa Susana Formation and probably is of late Paleocene age at its type locality.Two other neritid gastropods are present in the fauna with Velates vizcainoensis; namely, Corsania (Januncia) Janus n. subgen., n. sp. and Nerita (Theliostyla) n. sp.(?). Corsania Vidal, 1917, is a genus distinct from Otostoma and ranges from Early Cretaceous to Paleocene. Januncia n. subgen. has a Tethyan distribution and ranges from Maastrichtian through Paleocene.

Appraisal of the fossil record ofHomarus(nephropid lobster), with description of a new species from the upper Oligocene of Hungary and remarks on the status ofHoploparia

2017 ◽  
Vol 92 (2) ◽  
pp. 170-182 ◽  
Author(s):  
Dale Tshudy ◽  
Matúš Hyžný ◽  
Alfréd Dulai ◽  
John W.M. Jagt
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Fossil Record ◽  
Western Europe ◽  
Fossil Species ◽  
Upper Oligocene ◽  
Extant Species ◽  
The Status ◽  
A New Species

AbstractThe fossil record of the clawed lobster genus,Homarus, is appraised. The taxonomic history ofHomarusandHoplopariais summarized, and a list of species recognized for each is provided. A tabulation of all fossil species of the family Nephropidae permits assessment of nephropid species diversity through time. A new species ofHomarus,H.hungaricus, is recorded from the upper Oligocene (Chattian) Mány Formation at Mány, northern Hungary. The species is known by a single specimen consisting of a partial cephalothorax, a pleon minus telson, and partial chelipeds.Homarusis now known by two extant species (H.americanusandH.gammarus) and six fossil taxa, one of Early Cretaceous (Albian;H.benedeni) and five of Cenozoic age (H.hungaricusn. sp.,H.klebsi,H.lehmanni,H.morrisi, andH.percyi). The new fossilHomarusdiffers from modern congeners in aspects of carapace and pleon ornamentation and, especially, cutter claw shape. This is the fourth Oligocene occurrence of a nephropid species; all areHomarusand all are from Western Europe.Homarusmakes its appearance in the fossil record in the Early Cretaceous (Albian) and then is not known again until the Paleogene, despite the fact that nephropid lobsters in general are well known from the Late Cretaceous. Nephropid lobsters are better known from the Cretaceous than from the Cenozoic. Both raw species numbers and numbers corrected (normalized) for epicontinental sea coverage show that shelf-dwelling nephropid lobsters were most diverse during the Late Cretaceous.

The crucial boundaries in the development of the late cretaceous biota of plankton foraminifers in the southern part of the Indian ocean

2019 ◽  
Vol 59 (6) ◽  
pp. 1074-1085
Author(s):  
E. A. Sokolova
Keyword(s):  
Indian Ocean ◽  
Species Composition ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Planktonic Foraminifera ◽  
The Indian Ocean ◽  
Systematic Composition ◽  
Climatic Series

The article analyzes own data on the species composition of shells of planktonic foraminifera from the Upper Cretaceous sediments of the Indian Oceans, as well as from the sections of the offshore seas of Australia. The species of planktonic foraminifera are grouped and arranged in a climatic series. An analysis of the change in the systematic composition of foraminifers made it possible to distinguish periods of extreme and intermediate climatic states in the Late Cretaceous.

scholarly journals Burial and Exhumation History of the Lujing Uranium Ore Field, Zhuguangshan Complex, South China: Evidence from Low-Temperature Thermochronology

Minerals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 116
Author(s):  
Yue Sun ◽  
Barry P. Kohn ◽  
Samuel C. Boone ◽  
Dongsheng Wang ◽  
Kaixing Wang
Keyword(s):  
Early Cretaceous ◽  
Late Cretaceous ◽  
South China ◽  
Thermal History ◽  
Fission Track ◽  
Thermal Evolution ◽  
Negative Relationship ◽  
The Tibetan Plateau ◽  
Uranium Ore ◽  
Production Area

The Zhuguangshan complex hosts the main uranium production area in South China. We report (U-Th)/He and fission track thermochronological data from Triassic–Jurassic mineralized and non-mineralized granites and overlying Cambrian and Cretaceous sandstone units from the Lujing uranium ore field (LUOF) to constrain the upper crustal tectono-thermal evolution of the central Zhuguangshan complex. Two Cambrian sandstones yield reproducible zircon (U-Th)/He (ZHe) ages of 133–106 Ma and low effective uranium (eU) content (270–776 ppm). One Upper Cretaceous sandstone and seven Mesozoic granites are characterized by significant variability in ZHe ages (154–83 Ma and 167–36 Ma, respectively), which show a negative relationship with eU content (244–1098 ppm and 402–4615 ppm), suggesting that the observed age dispersion can be attributed to the effect of radiation damage accumulation on 4He diffusion. Correspondence between ZHe ages from sandstones and granites indicates that surrounding sedimentary rocks and igneous intrusions supplied sediment to the Cretaceous–Paleogene Fengzhou Basin lying adjacent to the LUOF. The concordance of apatite fission track (AFT) central ages (61–54 Ma) and unimodal distributions of confined track lengths of five samples from different rock units suggest that both sandstone and granite samples experienced a similar cooling history throughout the entire apatite partial annealing zone (~110–60 °C). Apatite (U-Th-Sm)/He (AHe) ages from six non-mineralized samples range from 67 to 19 Ma, with no apparent correlation to eU content (2–78 ppm). Thermal history modeling of data suggests that the LUOF experienced relatively rapid Early Cretaceous cooling. In most samples, this was followed by the latest Early Cretaceous–Late Cretaceous reheating and subsequent latest Late Cretaceous–Recent cooling to surface temperatures. This history is considered as a response to the transmission of far-field stresses, involving alternating periods of regional compression and extension, related to paleo-Pacific plate subduction and subsequent rollback followed by Late Paleogene–Recent India–Asia collision and associated uplift and eastward extrusion of the Tibetan Plateau. Thermal history models are consistent with the Fengzhou Basin having been significantly more extensive in the Late Cretaceous–Early Paleogene, covering much of the LUOF. Uranium ore bodies which may have formed prior to the Late Cretaceous may have been eroded by as much as ~1.2 to 4.8 km during the latest Late Cretaceous–Recent denudation.

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