Northeast Pacific Cretaceous record ofPyropsis(Neogastropoda: Pyropsidae) and paleobiogeography of the genus

2011 ◽  
Vol 85 (6) ◽  
pp. 1199-1215 ◽  
Author(s):  
Richard L. Squires
Keyword(s):  
Southern California ◽  
Upper Cretaceous ◽  
New World ◽  
Vancouver Island ◽  
Northern California ◽  
Shallow Marine ◽  
Northeast Pacific ◽  
Siliciclastic Rocks ◽  
First Time ◽  
Warm Temperate

The neogastropod genusPyropsisConrad, 1860 (family Pyropsidae Stephenson, 1941) is recognized for the first time from Upper Cretaceous shallow-marine siliciclastic rocks in the region extending from Vancouver Island, British Columbia southward to southern California. Four new species were detected:Pyropsis aldersoni(earliest Coniacian, southern California),Pyropsis californica(early Coniacian, northern California),Pyropsis louellae(late Coniacian or early Santonian, northern California), andPyropsis grahami(late early Campanian, Vancouver Island).A critical review of the global reports ofPyropsis, a genus that has been commonly confused with other genera (especiallyTudiclaRöding, 1798), establishes thatPyropsishad an amphitropical distribution and lived in warm-temperate waters adjacent to a broad tropical realm. It is rare to uncommon wherever found, and its geologic range is middle Cenomanian to an age near the Cretaceous/Paleogene boundary (probably earliest Paleocene). It was moderately widespread before the Maastrichtian but was predominantly restricted to the New World during the Maastrichtian.

Northeast Pacific Upper Cretaceous and Paleocene Glycymeridid Bivalves

2010 ◽  
Vol 84 (5) ◽  
pp. 895-917 ◽  
Author(s):  
Richard L. Squires
Keyword(s):  
Late Cretaceous ◽  
Upper Cretaceous ◽  
New Combination ◽  
Marine Waters ◽  
Shallow Marine ◽  
Fine Grained ◽  
Northeast Pacific ◽  
Siliciclastic Sediments ◽  
First Time ◽  
Warm Temperate

The Late Cretaceous to late Paleocene record of glycymeridid bivalves in the region extending from the Alaska Peninsula, southward to Baja California, Mexico is studied in detail for the first time. Glycymeris pacifica (Anderson, 1902), of late Cenomanian to late Turonian age, is the earliest known glycymeridid in the study area. Very locally, it is found with the middle to late Turonian Glycymeris yoloensis n. sp. The latter apparently represents some intermediate state between genus Glycymeris da Costa, 1778 and genus Glycymerita Finlay and Marwick, 1937. In the study area, Glycymerita is represented by Glycymerita veatchii (Gabb, 1864), middle to late Turonian to late Campanian; Glycymerita banosensis (Anderson, 1958) new combination, late Campanian to latest Maastrichtian; Glycymerita aleuta n. sp., known only from Alaska and of early Maastrichtian age; and Glycymerita major (Stanton, 1896) new combination, Selandian to Thanetian. All the studied species lived in warm-temperate, shallow-marine waters and were shallow burrowers in fine-grained siliciclastic sediments. Variability in morphology is common in sizeable populations of the various species, especially Glycymerita veatchii, which increased nearly fivefold in size during its 19.5 million-year-long range and culminated in shells up to 84 mm in length.

Northeast Pacific record of the Cretaceous marine gastropod Atira and a review of its paleobiogeography

2010 ◽  
Vol 84 (6) ◽  
pp. 1022-1030
Author(s):  
Richard L. Squires
Keyword(s):  
Early Cretaceous ◽  
Western Europe ◽  
Southwest Japan ◽  
Shallow Marine ◽  
Tethys Sea ◽  
Northeast Pacific ◽  
Western Interior Basin ◽  
South Sakhalin ◽  
First Time ◽  
Warm Temperate

The Cretaceous record of the shallow-marine margaritine gastropod genus Atira Stewart, 1927 in the region extending from Vancouver Island, to northern Baja California is studied in detail for the first time. It is represented by A. popenoei n. sp. (late Turonian to earliest Campanian), A. ornatissima (Gabb, 1864) (latest Santonian to late Campanian or possibly early Maastrichtian), and A. inornata (Gabb, 1864) (“mid” Maastrichtian), which is the youngest known species of Atira.Atira originated in the tropical waters of the Tethys Sea in western Europe as early as the Early Cretaceous, possibly during the Hauterivian but was present there by the late Aptian to early Albian. The genus subsequently immigrated to other regions and became adapted to warm-temperate waters. By the late Turonian it had migrated westward to northern California. During the Campanian it reached south Sakhalin and in the earliest Maastrichtian it was present in southwest Japan. Although Atira? nebrascensis (Meek and Hayden, 1856) has been questionably reported from Campanian to “mid” Maastrichtian deposits in the Wyoming area of the Western Interior Basin, this species does not belong in genus Atira.

Review of the bivalve genus Plicatula from Cretaceous and lower Cenozoic strata of California and Baja California

1997 ◽  
Vol 71 (2) ◽  
pp. 287-298 ◽  
Author(s):  
Richard L. Squires ◽  
Louella R. Saul
Keyword(s):  
New Species ◽  
Los Angeles ◽  
Lower Cretaceous ◽  
Southern California ◽  
Upper Cretaceous ◽  
Baja California ◽  
Middle Eocene ◽  
Baja California Sur ◽  
Northern California ◽  
Three New Species

The Cretaceous and early Cenozoic species of the shallow-marine, warm-water bivalve Plicatula from California (United States) and Baja California (Mexico) are reviewed, and three new species are named. All of these species are representatives of Plicatula and not of the closely related taxon Harpax, which is associated with high-latitude and cool-water regions. The earliestknown Cretaceous species of Plicatula from the study area is P. variata Gabb, 1864, from Lower Cretaceous (Hauterivian Stage) strata in northern California, and our studies show it to be conspecific with Plicatula onoensis Anderson, 1958.Plicatula allisoni new species is from Lower Cretaceous (Albian Stage) strata in Baja California, Mexico. Plicatula modjeskaensis new species is from Upper Cretaceous (Turonian Stage) strata in the Santa Ana Mountains, southern California. A possible new species from the same strata is also mentioned. A poorly preserved specimen of Plicatula? sp. is known from Upper Cretaceous (upper Campanian to lower Maastrichtian) strata in northern California.The only Paleocene species of Plicatula from the study area is P. ostreiformis Stanton, 1896, from lower Paleocene strata of Lake County, northern California, and our studies show it to be conspecific with Ostrea buwaldana Dickerson, 1914. The only previously described Eocene species of Plicatula from the study area is P. juncalensis Squires, 1987, from lower middle Eocene (“Capay Stage”) strata of Los Angeles County, southern California. Plicatula surensis new species is from middle lower Eocene (“Capay Stage”) strata in Baja California Sur, Mexico. In addition, there is a Plicatula? sp. from Eocene strata of Baja California Sur, Mexico.Although Plicatula is of uncommon occurrence north of Baja California, its thermophilic trait makes it useful in recognizing periods of warm climate.

scholarly journals Stratigraphy and palaeontology of the lower Miocene Kiel Sand Member (Berchem Formation) in temporary exposures in Antwerp (northern Belgium)

2020 ◽  
Vol 23 (3-4) ◽  
Author(s):  
STIJN EVERAERT ◽  
DIRK K. MUNSTERMAN ◽  
PIETER J. DE SCHUTTER ◽  
MARK BOSSELAERS ◽  
JEROEN VAN BOECKEL ◽  
...  
Keyword(s):  
Depositional Environment ◽  
Depositional Environments ◽  
Shallow Marine ◽  
Lower Miocene ◽  
North East ◽  
The North ◽  
Stratigraphic Position ◽  
First Time ◽  
The City ◽  
Warm Temperate

The stratigraphic position of the lower Miocene Kiel Sand Member of the Berchem Formation in the Antwerp area (northern Belgium) is not well constrained and its depositional environments are poorly known. Due to a spatial limited decalcification front, the Kiel Sand Member is completely decalcified in southern Antwerp and gradually becomes fossiliferous to the north-east of the city. The stratigraphy and palaeontology of the fossiliferous sediments in three temporary exposures are presented. The dinoflagellate cyst analysis of fossiliferous horizons shows the relative progress of a transgression in the southern North Sea Basin during the early–middle Burdigalian, that probably initiated in the late Aquitanian. The Kiel Sand Member contains an important mollusc fauna, with several species reported for the first time from this member. The taphonomy and fauna of the shell beds indicate a shallow marine, high energetic depositional environment, strongly influenced by storms, currents, waves and a rather low sedimentation rate. The climate was warm-temperate to subtropical. In all studied sections, the Kiel Sand Member could be clearly distinguished from the Antwerpen Sand Member: similarities and differences are discussed. Moving to the north of Antwerp, the erosive base of the Antwerpen Sand Member cuts deeper into the Kiel Sand Member. The Early Miocene Unconformity (EMU) is suggested at this contact.

First description of the male of Cretaconiopteryx grandis Liu & Lu, 2017 (Neuroptera: Coniopterygidae) from the Cretaceous Burmese amber

Zootaxa ◽  
2019 ◽  
Vol 4674 (4) ◽  
pp. 482-490 ◽  
Author(s):  
HONGYU LI ◽  
BO WANG ◽  
XINGYUE LIU
Keyword(s):  
Male Genitalia ◽  
Upper Cretaceous ◽  
Sister Group ◽  
Sister Group Relationship ◽  
Burmese Amber ◽  
Representative Species ◽  
First Time

The male of Cretaconiopteryx grandis Liu & Lu, 2017, which is the only representative species of the extinct dustywing subfamily Cretaconiopteryginae, is described for the first time from the Upper Cretaceous Burmese amber. The male genitalia, well preserved in the examined specimen, show a number of plesiomorphic characters, which support the sister group relationship between Coniopterygidae and the rest of extant lacewing families. 

The New World fauna of the genus Pseudonapomyza (Diptera: Agromyzidae)

2004 ◽  
Vol 136 (6) ◽  
pp. 781-791 ◽  
Author(s):  
Stéphanie Boucher
Keyword(s):  
Costa Rica ◽  
New World ◽  
World Species ◽  
First Time ◽  
World Fauna ◽  
Nearctic Region

AbstractThe New World species of Pseudonapomyza Hendel are reviewed. Only two species of the genus were previously known to occur in the Nearctic region: P. atra (Meigen) and P. lacteipennis (Malloch). Pseudonapomyza europaea Spencer and P. asiatica Spencer are here recorded for the first time in the Nearctic region and P. asiatica is recorded for the first time in Costa Rica and Venezuela. A key is provided to identify the four known New World species of Pseudonapomyza.

Fleeing the Soviet Union, Dancing on the West Coast

Experiment ◽  
2014 ◽  
Vol 20 (1) ◽  
pp. 297-316
Author(s):  
Lorin Johnson ◽  
Donald Bradburn
Keyword(s):  
Soviet Union ◽  
Los Angeles ◽  
High Power ◽  
West Coast ◽  
Southern California ◽  
The West ◽  
The Arts ◽  
The Soviet Union ◽  
First Time

In the 1970s and 1980s, Los Angeles audiences saw Soviet defectors Mikhail Baryshnikov, Alexander Godunov, Natalia Makarova, and Rudolf Nureyev in the prime of their careers at the Hollywood Bowl, The Dorothy Chandler Pavilion and the Greek Theater. Dance photographer Donald Dale Bradburn, a local Southern California dancer describes his behind-the-scenes access to these dancers in this interview. Perfectly positioned as Dance Magazine’s Southern California correspondent, Bradburn offers a candid appraisal of the Southern California appeal for such high-power Russian artists as well as their impact on the arts of Los Angeles. An intimate view of Russian dancers practicing their craft on Los Angeles stages, Bradburn’s interview is illustrated by fourteen of his photographs, published for the first time in this issue of Experiment.

Review of Mexican species of the genus Phytodietus Gravenhorst (Hymenoptera: Ichneumonidae)

2007 ◽  
Vol 16 (1) ◽  
pp. 49-58
Author(s):  
D.R. Kasparyan
Keyword(s):  
New Species ◽  
New World ◽  
New Subspecies ◽  
First Time ◽  
Mexican Species

A key to 11 Mexican species of Phytodietus is given. Four new species and one new subspecies are described: Ph. (Weisia) whartoni sp. n., Ph. (Neuchorus) javieri sp. n., Ph. (Phytodietus) ninyoi sp. n., Ph. (Ph.) ruizi sp. n., Ph. (Ph.) yamilethi chiapasi ssp. n. The subgenus Weisia is recorded for the first time from the New World and the subgenus Phytodietus s. str., from Mexico.

Molecular insights into the phylogenetic placement of the poorly known genus Niceforonia Goin & Cochran, 1963 (Anura: Brachycephaloidea)

Zootaxa ◽  
2018 ◽  
Vol 4514 (4) ◽  
pp. 487
Author(s):  
ANDRÉS R. ACOSTA-GALVIS ◽  
JEFFREY W. STREICHER ◽  
LUIGI MANUELLI ◽  
TRAVIS CUDDY ◽  
RAFAEL O. DE SÁ
Keyword(s):  
Phylogenetic Analysis ◽  
New World ◽  
Taxonomic Revision ◽  
Phylogenetic Inference ◽  
Genetic Distances ◽  
Molecular Phylogenetic Analysis ◽  
Phylogenetic Placement ◽  
Molecular Phylogenetic ◽  
First Time

Among New World direct-developing frogs belonging to the clade Brachycephaloidea (= Terraranae), there are several genera with uncertain phylogenetic placements. One notable example is the genus Niceforonia Goin & Cochran 1963, which includes three species that are endemic to Colombia. Three specimens of the species Niceforonia nana were collected and for the first time the genus is included in a molecular phylogenetic analysis of mitochondrial (mtDNA; 12S and 16S) and nuclear (nucDNA; TYR and RAG1) markers. Molecular phylogenetic inference based on concatenated and separate mtDNA and nucDNA analyses recovered Niceforonia nana nested within Hypodactylus Hedges et al. 2008, rendering the latter genus paraphyletic. Consequently, herein we place the genus Hypodactylus in the synonymy of Niceforonia to resolve the paraphyly and place Niceforonia in the subfamily Hypodactylinae. Based on our revised concept of the genus Niceforonia we conducted preliminary morphological comparisons using specimens and literature descriptions. Finally, Nicefornia nana is quite divergent from other species of Niceforonia (uncorrected genetic distances of ca. 10% 16S and 7% TYR) suggesting that further taxonomic revision may be warranted. 

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