Permian platycrinitid crinoids from Arctic North America

1977 ◽  
Vol 14 (5) ◽  
pp. 1166-1175 ◽  
Author(s):  
Thomas W. Broadhead ◽  
Harrell L. Strimple
Keyword(s):  
North America ◽  
Ellesmere Island ◽  
Upper Carboniferous ◽  
Potential Problems

Crinoid taxa based solely on parts of the stem lead to potential problems of synonymy and to nomenclatural instability. Many stem morphotypes appear to be vicarious, and homeomorphy may be common among even the most specialized appearing stems. The affinity of the crinoid stem 'genus' Platyplateium Moore and Jeffords to the camerate crinoid family Platycrinitidae is confirmed by its association with a Platycrinites-like calyx (Platycrinites nikondaense n.sp.). Platycrinites nikondaense from the Permian of Alaska and P. ellesmerense n. sp. from the Permian (Guadalupian) of Ellesmere Island represent species that have evolved by means of a secondary decrease in number of tegmen plates and modification of the stem from the Platycrinites type to the platyplateioid form. Platycrinites remotus Strimple and Watkins, from the Upper Carboniferous of Texas represents an earlier stage in tegminal evolution, but had probably already developed a platyplateioid stem.

scholarly journals William Culp Darrah (1909–1989)

1990 ◽  
Vol 64 (5) ◽  
pp. 857-857 ◽  
Author(s):  
Elsie Darrah Morey
Keyword(s):  
United States ◽  
North America ◽  
Critical Review ◽  
The United States ◽  
Eastern United States ◽  
Upper Carboniferous ◽  
International Geological

William C. Darrah, educator, geologist, botanist, and historian, loved life, and he chose to share with others his genuine enjoyment of discovery and learning through his writing and teaching. His A Critical Review of the Upper Carboniferous Floras of the Eastern United States (1970) and nearly a hundred professional papers made his name familiar to many paleontologists in Pennsylvania and throughout the United States. It is interesting to note that early in his career Bill developed an interest in the early conifers, especially Walchia. At the time of his death, he had just completed a manuscript with Paul Lyons, “The Earliest Conifers in North America: Upland and/or Paleoclimatic Indicators?,” “which has been accepted for publication in PALAIOS. Most recently, having attended the International Geological Conference in the United States in 1933, Bill had hoped to present a paper on the Dunkard at the July 1989 IGC in Washington, D.C.

New occurrences of Oldhamia and other trace fossils in the Cambrian of the Yukon and Ellesmere Island, arctic Canada

1994 ◽  
Vol 31 (5) ◽  
pp. 767-782 ◽  
Author(s):  
H. J. Hofmann ◽  
M. P. Cecile ◽  
L. S. Lane
Keyword(s):  
North America ◽  
Western Europe ◽  
Trace Fossils ◽  
Trace Fossil ◽  
Ellesmere Island ◽  
Early Cambrian ◽  
Arctic Canada ◽  
North Central ◽  
Middle Cambrian ◽  
New Occurrences

Trace fossil assemblages from green and maroon argillites at 34 localities in the British Mountains and Barn Mountains of northernmost Yukon, and 3 localities in the Grant Land Formation of northern Ellesmere Island contain abundant Planolites spp., Oldhamia curvata, Oldhamia flabellata, and Oldhamia radiata, and rare Oldhamia antiqua, Oldhamia? wattsi (n.comb.), Bergaueria hemispherica, Cochlichnus sp., Didymaulichnus? sp., Helminthoidichnites sp., Monomorphichnus sp., Protopaleodictyon sp., and Tuberculichnus? sp. Additionally, 11 new sites in the Selwyn Mountains of north-central Yukon have yielded an ichnofauna including Helminthorhaphe sp., O. curvata, O. flabellata, O. radiata, Plagiogmus? sp., Planolites spp., and unidentified small hemispherical traces. All these assemblages are interpreted as Early Cambrian to early Middle Cambrian, based on comparison with Oldhamia-bearing ichnofaunas of similar age in North America, Argentina, and western Europe, and on archaeocyathids and olenellids in overlying units.

Ephemeroid wing venation based upon new gigantic Carboniferous mayflies and basic morphology, phylogeny, and metamorphosis of pterygote insects (Insecta, Ephemerida)

1985 ◽  
Vol 63 (4) ◽  
pp. 933-955 ◽  
Author(s):  
Jarmila Kukalová-Peck
Keyword(s):  
North America ◽  
Abdominal Segment ◽  
Sister Group ◽  
Wing Venation ◽  
Upper Carboniferous ◽  
Evolutionary Changes ◽  
Primitive Condition ◽  
Wing Veins ◽  
Tracheal Gills ◽  
Plesiomorphic Character

Gigantic as well as very large mayflies from the middle Upper Carboniferous (Westphalian) strata of Europe and North America are described: the adult and nymph of Bojophlebia prokopi n. gen., n. sp. (Bojophlebiidae n. fam.) and the nymphs of Lithoneura piecko n. sp. and Lithoneura clayesi n. sp. (Syntonopteridae). Evolution of ephemerid wing venation during 300 million years is summarized. Autapomorphic, apomorphic, and plesiomorphic character states of venation are categorized. Venational nomenclature of Recent Ephemerida is emended based on its evolutionary changes. Evidence that wing veins occurred primitively as a pair of fluted sectors is documented in Carboniferous mayflies in the costa, subcosta, radius, anal, and jugal. Ephemeroids and odonatoids are sister groups that share the veinal anal brace AA fused with CuP at an area important for flight. Ancestral Odonatoephemerida are the sister group of the extinct haustellate Paleoptera. The Carboniferous nymphs bear three pairs of almost homonomous thoracic wings and, on the abdomen, nine pairs of legs and nine pairs of tracheal gills (wing homologues). This proves that abdominal legs have been totally reduced in Recent Ephemerida except for the claspers (gonopods) and that tracheal gills are not flattened legs. The metamorphic instar probably originated in relatively young instars. Insectan cerci developed from segmented, arched, functional legs of abdominal segment 11, which were still present in this primitive condition in Carboniferous Monura.

scholarly journals First record of Ophraella communa in Hungary (Coleoptera: Chrysomelidae)

2020 ◽  
Vol 81 ◽  
pp. 73-79
Author(s):  
Dávid Horváth ◽  
Márk Lukátsi
Keyword(s):  
North America ◽  
Host Plant ◽  
Plant Protection ◽  
First Record ◽  
Leaf Beetle ◽  
Ambrosia Artemisiifolia ◽  
Main Host ◽  
Potential Problems ◽  
Ophraella Communa ◽  
First Time

Ophraella communa LeSage, 1986, a leaf beetle native to North America, is recorded for the first time from Hungary. Several specimens were found on a degraded meadow in the outskirts of Budapest. Its importance in suppressing its main host plant, common ragweed (Ambrosia artemisiifolia L.), is shortly discussed, as well as the potential problems it can cause in plant protection. With 5 figures.

Reptile trackway from the Lee Formation (Lower Pennsylvanian) of south-central Kentucky

1994 ◽  
Vol 68 (1) ◽  
pp. 154-158 ◽  
Author(s):  
Donald R. Chesnut ◽  
Donald Baird ◽  
J. Hiram Smith ◽  
Richard Q. Lewis
Keyword(s):  
North America ◽  
Upper Carboniferous ◽  
South Central ◽  
Fourth Digit ◽  
Digit Length

An Early Pennsylvanian tetrapod trackway, referred to Notalacerta missouriensis Butts, was found in the Rockcastle Sandstone Member (Westphalian A, Upper Carboniferous) of the Lee Formation in McCreary County, Kentucky. Terrestrial characteristics of the trackway, such as digit length, claw marks, gait, and tail drag, suggest that it was made by a member of the primitive reptile family Protorothyrididae. If identified correctly, this is the oldest known reptile trackway in North America. The animal that made the trackway was approximately 0.4 m in length. The pes tracks are slightly larger and set slightly wider than the manus tracks; digits are elongated and slender, and the fourth digit of the pes is the longest. Whereas the slender, long toes indicate a terrestrial form, the gait was more advanced than the sprawling gait typical of the most primitive tetrapods.

Throopella typa, a new Devonian Scaphopod

1933 ◽  
Vol 70 (8) ◽  
pp. 373-374
Author(s):  
D. K. Greger
Keyword(s):  
North America ◽  
Middle Devonian ◽  
Mississippi Valley ◽  
Rare Occurrence ◽  
Upper Carboniferous

Scaphopods are of rare occurrence in the Paleozoic of North America. Dentalium and Plagioglypta have been recorded from formations as old as Middle Devonian; however, their occurrence is always sporadic and it is only in the Upper Carboniferous rocks that they are met with in any number. The form here described is the first Devonian occurrence of the Class that has come to the writer’s notice throughout a period of thirty-five years’ active collecting in the Devonian of the Mississippi Valley.

Early Eocene Leptictida, Pantolesta, Creodonta, Carnivora, and Mesonychidae (Mammalia) from the Eureka Sound Group, Ellesmere Island, Nunavut

2002 ◽  
Vol 39 (6) ◽  
pp. 899-910 ◽  
Author(s):  
Jaelyn J Eberle ◽  
Malcolm C McKenna
Keyword(s):  
North America ◽  
North Atlantic ◽  
High Latitude ◽  
Ellesmere Island ◽  
Early Eocene ◽  
Land Bridge ◽  
Faunal List

We describe the leptictid Prodiacodon; the pantolestids Palaeosinopa sp.nov., cf. Palaeosinopa, and Pantolestidae, gen. et sp. indet.; the creodonts Palaeonictis and Prolimnocyon; the carnivorans Viverravus, cf. Vulpavus, and Miacis; and the mesonychid Pachyaena from early Eocene (i.e., Wasatchian) strata of the Eureka Sound Group on central Ellesmere Island, Nunavut. Palaeosinopa and Palaeonictis may have originated in mid-latitude North America and subsequently migrated to Europe via a north Atlantic land bridge, while Prolimnocyon and Pachyaena probably originated in Asia. Additionally, the occurrence of Pachyaena in the Early Eocene of Europe probably is best explained by dispersal from high-latitude North America to Europe via a north Atlantic land bridge. We update the Eureka Sound Group mammalian faunal list.

Sign in / Sign up

Export Citation Format

Share Document