Peremistocrinus from the Dewey Limestone Formation, Oklahoma

1948 ◽  
Vol 85 (2) ◽  
pp. 113-116
Author(s):  
Harrell L. Strimple
Keyword(s):  
North America ◽  
Systematic Study ◽  
National Museum ◽  
Lower Carboniferous ◽  
Upper Carboniferous ◽  
James Wright ◽  
North Eastern ◽  
The U.S

The first systematic study of anal variations found among various Carboniferous crinoids was presented by James Wright (Geol. Mag., lxiii, 1926) and covered Eupachycrinus calyx (McCoy) (now Phanocrinus Kirk) and Zeacrinus konincki Bather. Subsequently (Geol. Mag., lxiv, 1927), the genus Hydreionocrinus, and Ulocrinus globitlaris (Geinitz) (now Ureocrinus Wright and Strimple, Geol. Mag., lxxxii, 1945) were also considered. A total of 2,014 dorsal cups from the Scottish Lower Carboniferous (Mississippian) were involved in the examinations. These specimens were all from strata considered equivalent to the Chester Series (upper Mississippian) of North America. When presenting the genus Phanocrinus Kirk (Journ. Paleont., 11, 1937) recognized the importance of Wright's studies, but noted that examination of an almost equal amount of American material (primarily the Springer collection of the U.S. National Museum) had failed to disclose such great variations. That Kirk was highly impressed by Wright's studies is certain, for in personal conversations, several years ago, he emphasized the potentialities as they might affect my impending studies of Pennsylvanian crinoids. It has, therefore, been with much interest that I have watched similar patterns of development appearing in the large collections being made from both Chester (Upper Mississippian = European upper Lower Carboniferous) and Missouri (Middle Pennsylvanian = European middle Upper Carboniferous) of north-eastern Oklahoma.

Two New Nearctic Species of Spilomyia (Diptera: Syrphidae), with a Note on the Taxonomic Value of Wing Microtrichia in the Syrphidae

1958 ◽  
Vol 90 (5) ◽  
pp. 284-291 ◽  
Author(s):  
J. R. Vockeroth
Keyword(s):  
New Species ◽  
North America ◽  
The Other ◽  
National Museum ◽  
Western North America ◽  
The U.S

Three species of Spilomyia from western North America have been in the Canadian National Collection under the name Spilomyia interrupta Williston, 1882. Two of these are described below as new. Through the co-operation of Mr. Paul Arnaud, then of the U.S. National Museum, I examined the two female syntypes of interrupta and four other specimens of the group. One syntype, labelled “W.J.; Acc. 19702, Williston; Type No. 875, U.S.N.M.; Spilomyia interrupta Will.” on four labels is hereby designated as lectotype; it has been so labelled. The other syntype is a specimen of the species described below as Spilomyia citima n.sp. The other four specimens in the U.S.N.M. are all of interrupta: 1 ♂, Hopland, Calif., Sept.; 1 ♂, Mountains near Claremont, Calif.; 1 ♀, Tuolumne, Calif.; 1 ♀, Medford, Oreg. The C.N.C. contains two specimens of interrupta: 1 ♂, Hopland, Calif., Sept.; 1 ♀, Rowena, Oreg., Sept. 1, 1923 (on flowers of Eriogonum umbellatum). Mr. R. H. Foxlee of Robson, B.C., kindly sent me several specimens for study and donated most of them to the C.N.C.; it gives me pleasure to dedicate one of the new species to him.

A New Braconid from Mexico

1952 ◽  
Vol 84 (1) ◽  
pp. 30-31
Author(s):  
John C. Martin
Keyword(s):  
North America ◽  
Economic Importance ◽  
National Museum ◽  
Undescribed Species ◽  
Cornell University ◽  
North America North ◽  
The U.S

In revising the genus Triaspis Haliday, as found in North America north of Mexico, the author studied an undescribed species from Mexico. This form is a parasite of Apion godmani Wagner, a weevil of economic importance. This paper provides a name and a description for this new parasite.The author is most grateful to Dr. V. S. L. Pate of Cornell University for his helpful criticism of the manuscript, and also to Mr. C. F. W. Muesebeck of the U.S. National Museum for the loan of material, and to Dr. Arthur C. Smith of Cornell University for the specimens collected while he was studying the biology of the host in Mexico.

Toward Clarifying the Wyoming Ranges of the Vireo gilvus Complex

Western Birds ◽  
2021 ◽  
Vol 52 (3) ◽  
pp. 240-251
Author(s):  
M. Ralph Browning
Keyword(s):  
North America ◽  
Museum Specimens ◽  
National Museum ◽  
Breeding Populations ◽  
Eastern Species ◽  
The U.S

The Warbling Vireo (Vireo gilvus), generally recognized as one polytypic species, is widely distributed across North America, but differences in morphology, song, genetics, and ecology suggest the western and eastern populations may represent two species. Understanding their distributions enables tracking of range changes and other factors that might affect the conservation of populations. Therefore, I studied museum specimens, specimen data, and identifications provided by investigators recording songs to help clarify the ranges of the two taxa in Wyoming. Of 18 specimens in the U.S. National Museum collected from 1858 to 1930, I identify 15 as the western species V. swainsoni. These are spread over most of Wyoming, east to Crook and Albany counties. Only three represent the eastern species V. gilvus, two from Greybull, Big Horn Co., and one from Cheyenne. Whether the overlap represents sympatry of breeding populations in eastern Wyoming or overlap in migration remains to be determined.

Advanced cladid crinoids from the Middle Mississippian of the east-central United States: primitive-grade calyces

1992 ◽  
Vol 66 (3) ◽  
pp. 461-480 ◽  
Author(s):  
Thomas W. Kammer ◽  
William I. Ausich
Keyword(s):  
North America ◽  
Junior Synonym ◽  
Valid Species ◽  
Lower Carboniferous ◽  
East Central ◽  
Upper Carboniferous ◽  
First Report ◽  
Middle Mississippian ◽  
Senior Synonym ◽  
Central United States

Species of the late Osagean and early Meramecian advanced cladid crinoid genera (suborder Poteriocrinina)Armenocrinus, Bollandocrinus, Corythocrinus, Cosmetocrinus, Culmicrinus, Cydrocrinus, Histocrinus, Hypselocrinus, Lebetocrinus, Ophiurocrinus, Poteriocrinites, Scytalocrinus, Springericrinus, andUlrichicrinusfrom Illinois, Indiana, Iowa, and Missouri are redescribed and redefined from study of type material. Nomenclatural and systematic acts include the following: 1)Poteriocrinus tenuidactylusWorthen, 1882, is a senior synonym ofScaphiocrinus obscurusWachsmuth and Springer, 1886, and is assigned toArmenocrinus; 2)P. verusMiller and Gurley, 1890, is assigned toCulmicrinus; 3)P. mammaeformisWortheninMiller, 1889, is questionably assigned toCulmicrinus; 4)Cydrocrinus coxanus(Worthen, 1882) is a junior synonym ofC. concinnus(Meek and Worthen, 1870); 5)Decadocrinus stellatusLane and Howell, 1986, is questionably assigned toHistocrinus; 6)P. crawfordsvillensisMiller and Gurley, 1890, is a junior synonym ofHypselocrinus hoveyi(WortheninWorthen and Meek, 1875); 7)Hypselocrinus boonvillensis(Miller, 1891) andH. neglectus(Miller and Gurley, 1896) are junior synonyms ofH. arcanus(Miller and Gurley, 1890); 8)Hypselocrinus vansantin. sp. is described; 9)Hypselocrinus indianensis(Meek and Worthen, 1865) is a nomem dubium; 10)Poteriocrinus arachnaeformisWorthen, 1882, is a valid species ofPoteriocrinites; 11)P. cantonensisMiller and Gurley, 1890, is assigned toScytalocrinus; 12)Ulrichicrinus coryphaeus(Miller, 1891),P. amoenusMiller, 1891, andP. brittsiMiller, 1891, are junior synonyms ofU. agnatus(Miller, 1891); and 13)P. illinoisensisWorthen, 1882, is questionably assigned toUlrichicrinus.Bollandocrinus? sp. from the Keokuk Limestone might represent the first report of the genus from North America, being previously known only from the lower Carboniferous of Great Britain.Ophiurocrinussp. from the Keokuk Limestone is the first report of this genus from the Osagean, being previously known only from the Chesterian of North America and the upper Carboniferous of Europe.

Planalvus (Brachiopoda, Athyridida) from the Lower Devonian of the Armorican Massif, northwest France

1994 ◽  
Vol 68 (3) ◽  
pp. 451-460 ◽  
Author(s):  
Patrick R. Racheboeuf ◽  
Paul Copper ◽  
Fernando Alvarez
Keyword(s):  
New Species ◽  
North America ◽  
Lower Devonian ◽  
Eastern North America ◽  
Lower Carboniferous ◽  
Armorican Massif ◽  
A New Species

Cryptonella? cailliaudi Barrois, 1889, from the Lower Devonian of the Armorican Massif, is tentatively assigned to the athyridid brachiopod genus Planalvus Carter, thus far known only from the Lower Carboniferous of eastern North America. In addition, a new species, Planalvus rufus, is described from the Bois-Roux Formation (Pragian) of Brittany, France. These French species are small brachiopods with complex spiralial and jugal structures, which permit assignment to the order Athyridida.

scholarly journals II.—On Solenopora garwoodi, sp. nov., from the Lower Carboniferous in the North-West of England

1913 ◽  
Vol 10 (7) ◽  
pp. 289-292 ◽  
Author(s):  
George J. Hinde
Keyword(s):  
North America ◽  
Calcareous Algae ◽  
Lower Carboniferous ◽  
North West ◽  
The North ◽  
Jurassic Rocks

Some years since Professor E. J. Garwood sent to me for examination some pieces of limestone from the Lower Carboniferous rocks in the Shap and Ravenstonedale districts of Westmorland, in which he had observed the rounded outlines of fossils with a structure which appeared to him to resemble that of Stromatopora. The rock in which the fossils were embedded was so compact and hard that they could not be extracted, and it was necessary to make sections in various directions in order to ascertain their structure, which proved to be identical with that of Solenopora, now well known as one of the calcareous Algæ. It is many years ago since this genus was recognized in the Ordovician rocks in North America, Britain, and Eussia; more recently it was found in the Silurian rocks of the Isle of Gotland, and in 1894 a species was described from the Jurassic rocks of Gloucestershire and Yorkshire. But until this fortunate discovery of its occurrence in the Lower Carboniferous by Professor Garwood, no example of the genus was known in any of the rocks between the Silurian and the Jurassic.

An Integrated Approach to Well Logging: The Case of the Bazhenov Formation

2021 ◽  
Author(s):  
Dmitry Mikhailovich Lazutkin ◽  
Oleg Vladimirovich Bukov ◽  
Denis Vagizovich Kashapov ◽  
Albina Viktorovna Drobot ◽  
Maria Alexandrovna Stepanova ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Integrated Approach ◽  
Donets Basin ◽  
Lower Carboniferous ◽  
Upper Carboniferous ◽  
Salt Domes ◽  
Axial Part ◽  
Gravity And Magnetic ◽  
Play Elements ◽  
Hydrocarbon Reserves

Abstract New geological structures – displaced blocks of salt diapirs’ overburden – were identified in the axial part of the Dnieper-Donets basin (DDB) beside one of the largest salt domes due to modern high-precision gravity and magnetic surveys and their joint 3D inversion with seismic and well log data. Superposition of gravity lineaments and wells penetrating Middle and Lower Carboniferous below Permian and Upper Carboniferous sediments in proximity to salt allowed to propose halokinetic model salt overburden displacement, assuming Upper Carboniferous reactivation. Analogy with rafts and carapaces of the Gulf of Mexico is considered in terms of magnitude of salt-induced deformations. Density of Carboniferous rocks within the displaced flaps evidence a high probability of hydrocarbon saturation. Possible traps include uplifted parts of the overturned flaps, abutting Upper Carboniferous reservoirs, and underlying Carboniferous sequence. Play elements are analyzed using analogues from the Dnieper-Donets basin and the Gulf of Mexico. Hydrocarbon reserves of the overturned flaps within the study area are estimated to exceed Q50 (Р50) = 150 million cubic meters of oil equivalent.

scholarly journals Effects of aerosols on precipitation in north-eastern North America

2014 ◽  
Vol 14 (10) ◽  
pp. 5111-5125 ◽  
Author(s):  
R. Mashayekhi ◽  
J. J. Sloan
Keyword(s):  
North America ◽  
Atlantic Coast ◽  
Inverse Correlation ◽  
Cloud Droplet ◽  
Cloud Microphysics ◽  
Convective Precipitation ◽  
Eastern North America ◽  
Anthropogenic Aerosols ◽  
Convective Rain ◽  
North Eastern

Abstract. The changes in precipitation in north-eastern North America caused by chemistry – and particularly anthropogenic aerosols – are investigated using the Weather Research Forecasting with Chemistry (WRF/Chem v3.2) model. The simulations were carried out for a five-month period from April to August 2009. The model results show that non-negligible changes in both convective and cloud-resolved (non-convective) precipitation are caused by chemistry and/or aerosols over most parts of the domain. The changes can be attributed to both radiative and microphysical interactions with the meteorology. A chemistry-induced change of approximately −15% is found in the five-month mean daily convective precipitation over areas with high convective rain; most of this can be traced to radiative effects. Total convective rain is greater than total non-convective rain in the domain, but a chemistry-induced increase of about 30% is evident in the five-month mean daily non-convective precipitation over the heavily urbanized parts of the Atlantic coast. The effects of aerosols on cloud microphysics and precipitation were examined for two particle size ranges, 0.039–0.1 μm and 1–2.5 μm, representing the nucleation and accumulation modes respectively. Strongly positive spatial correlation between cloud droplet number and non-convective rain are found for activated (cloud-borne) aerosols in both size ranges. Non-activated (interstitial) aerosols have a positive correlation with cloud droplet number and non-convective rain when they are small and an inverse correlation for larger sizes.

scholarly journals Stratigraphy and depositional history of the Upper Palaeozoic and Triassic sediments in the Wandel Sea Basin, central and eastern North Greenland

1989 ◽  
Vol 143 ◽  
pp. 21-45
Author(s):  
L Stemmerik ◽  
E Håkansson
Keyword(s):  
Early Carboniferous ◽  
Upper Permian ◽  
Lower Permian ◽  
Late Permian ◽  
The West ◽  
Depositional History ◽  
Lower Carboniferous ◽  
Upper Carboniferous ◽  
Lithostratigraphic Units ◽  
History Of

A lithostratigraphic scheme is erected for the Lower Carboniferous to Triassic sediments of the Wandel Sea Basin, from Lockwood Ø in the west to Holm Land in the east. The scheme is based on the subdivision into the Upper Carboniferous - Lower Permian Mallemuk Mountain Group and the Upper Permian - Triassic Trolle Land Group. In addition the Upper Carboniferous Sortebakker Formation and the Upper Permian Kap Kraka Formation are defined. Three formations and four members are included in the Mallemuk Mountain Group. Lithostratigraphic units include: Kap Jungersen Formation (new) composed of interbedded limestones, sandstones and shales with minor gypsum - early Moscovian; Foldedal Formation composed of interbedded limestones and sandstones -late Moseovian to late Gzhelian; Kim Fjelde Formation composed of well bedded Iimestones - late Gzhelian to Kungurian. The Trolle Land Group includes three formations: Midnatfjeld Formation composed of dark shales, sandstones and limestones - Late Permian; Parish Bjerg Formation composed of a basal conglomeratic sandstone overlain by shales and sandstones - ?Early Triassic (Scythian); Dunken Formation composed of dark shales and sandstones - Triassic (Scythian-Anisian). The Sortebakker Formation (new) is composed of interbedded sandstones, shales and minor coal of floodplain origin. The age is Early Carboniferous. The Kap Kraka Formation (new) includes poorly known hematitic sandstones, conglomerates and shales of Late Permian age.

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