Nevadoceras, a new Early Permian adrianitid (Ammonoidea) from Nevada

1995 ◽  
Vol 69 (6) ◽  
pp. 1073-1079 ◽  
Author(s):  
Tamra A. Schiappa ◽  
Claude Spinosa ◽  
Walter S. Snyder
Keyword(s):  
New Genus ◽  
Early Permian ◽  
New Genus And Species ◽  
White Pine ◽  
East Central ◽  
Basinal Facies

The Early Permian (late Sakmarian to early Artinskian) adrianitid ammonoid Nevadoceras steelei new genus and species occurs in a fauna containing the ammonoids Properrinites Elias, Prothalassoceras Böse, Daraelites Gemmellaro, Almites Toumanskaya, Bamyaniceras Termier and Termier, Akmilleria Ruzhencev, Agathiceras Gemmellaro, Metalegoceras Schindewolf, Stenolobulites Mikesh, Glenister, and Furnish, Crimites Toumanskaya, Neocrimites Ruzhencev and the conodonts Sweetognathus whitei (Rhodes) and Mesogondolella bisselli (Clark and Behnken). This fauna occurs in a concretionary interval within micritic basinal facies of the Dry Mountain trough at Portuguese Springs, White Pine County, east-central Nevada.

The first Permian scorpionfly from Germany (Insecta, Panorpida: Protomeropidae)

2021 ◽  
Vol 4 (3) ◽  
Author(s):  
MARKUS J. POSCHMANN ◽  
ANDRÉ NEL
Keyword(s):  
Central Europe ◽  
Black Shale ◽  
New Genus ◽  
Climatic Changes ◽  
Late Carboniferous ◽  
Early Permian ◽  
New Genus And Species

A new genus and species, Glanomerope virgoferroa gen. et sp. nov., the first Permian record of a scorpionfly from Germany, is described from the Niedermoschel black shale, Meisenheim Formation, Lower Rotliegend of the Saar-Nahe basin. It is assigned to the Protomeropidae, the oldest known family of the holometabolous superorder Panorpida, ranging from the Bashkirian-Moscovian (Late Carboniferous) to the Roadian. It confirms that this family was very diverse in Central Europe during the Early Permian. Protomeropidae possibly became extinct in the course of major climatic changes that progressively affected the supercontinent Pangea after the Artinskian, although generally these changes seem to have more severely affected some other insects such as the palaeopteran Dictyoneuridae than holometabolous groups.

The complex morphology of a new Lower Silurian asteroid (Echinodermata)

2009 ◽  
Vol 83 (1) ◽  
pp. 63-69 ◽  
Author(s):  
Daniel B. Blake ◽  
Frank R. Ettensohn
Keyword(s):  
New Genus ◽  
New Genus And Species ◽  
Crown Group ◽  
East Central ◽  
Lower Silurian ◽  
Complex Morphology

Gordonaster brassfieldensis is a new genus and species of Asteroidea (Echinodermata) described from the Lower Silurian Brassfield Formation of east-central Kentucky. Tentatively assigned to the poorly understood Palaeasteridae, Gordonaster shares much with Ordovician asteroids, yet it also exhibits apparent homoplasies that presage the post-Paleozoic crown group. Available specimens also indicate that the ontogenetic pattern of ossicular addition seen in the crown group was established during the Paleozoic.

Fossil crabs (Crustacea: Decapoda) from the Late Cretaceous cárdenas Formation, east-central Mexico

1995 ◽  
Vol 69 (2) ◽  
pp. 340-350 ◽  
Author(s):  
Francisco J. Vega ◽  
Rodney M. Feldmann ◽  
Francisco Sour-Tovar
Keyword(s):  
Late Cretaceous ◽  
Fossil Record ◽  
New Genus ◽  
Gulf Coast ◽  
Central Mexico ◽  
New Genus And Species ◽  
East Central ◽  
The Family ◽  
Marine Lagoon ◽  
First Time

Twenty-four nearly complete carapace samples were collected at three different localities of the Maastrichtian (Late Cretaceous) Cárdenas Formation in San Luis Potosí, east-central Mexico. The material has been assigned to five families: the Callianassidae, Dakoticancridae, Carcineretidae, ?Majidae, and Retroplumidae. Two genera of callianassid shrimp are described, Cheramus for the first time in the fossil record. Dakoticancer australis Rathbun is reported as the most abundant crustacean element; one new genus and species of carcineretid crab, Branchiocarcinus cornatus, is erected, and a single, fragmentary specimen is questionably referred to the Majidae. The three localities reflect paleoenvironmental differences, exhibited by different lithologies, within marginal marine, lagoon environments. The record of dakoticancrid crabs in the Cardenas Formation extends the paleobiogeographic range of the family and the genus Dakoticancer. Carcineretid crabs, although not abundant, seem to have been a persistent element of crustacean assemblages in clastic environments during the Late Cretaceous of the ancestral Gulf Coast of Mexico.

A North American freshwater sponge (Eospongilla morrisonensis new genus and species) from the Morrison Formation (Upper Jurassic), Colorado

1999 ◽  
Vol 73 (3) ◽  
pp. 389-393 ◽  
Author(s):  
Stan P. Dunagan
Keyword(s):  
North American ◽  
New Genus ◽  
Upper Jurassic ◽  
Morrison Formation ◽  
Freshwater Sponge ◽  
New Genus And Species ◽  
East Central ◽  
North American Freshwater ◽  
Lacustrine Carbonate

Eospongilla morrisonensis n. gen. and sp., the oldest-described freshwater sponge (Demospongea: Spongillidae), is found in the Upper Jurassic (?Oxfordian/Kimmeridgian to Tithonian) Morrison Formation, east-central Colorado, U.S.A. Eospongilla morrisonensis occurs within the well-developed lacustrine carbonate succession of the Morrison Formation, and is represented by two micritic body fossils with calcite-replaced megascleres that range in length from 180 to 300 μm and in diameter from 20 to 35 μm. Megascleres are simple oxeas and strongyles and lack apparent ornamentation, possibly due to the diagenetic replacement. The oxeas are straight but the strongyles display a slight curvature. Microscleres are absent; gemmoscleres were not observed.

The genus Vesperispira (Gastropoda: Pleurotomarioidea) from the Permian of two displaced terranes, western United States

2000 ◽  
Vol 74 (4) ◽  
pp. 741-744
Author(s):  
Thomas E. Yancey ◽  
Ellen E. Strong ◽  
Rex A. Hanger
Keyword(s):  
United States ◽  
North America ◽  
Endemic Species ◽  
New Genus ◽  
Pine Forest ◽  
Western United States ◽  
Early Permian ◽  
New Genus And Species ◽  
Western Margin ◽  
Northwestern Nevada

Early permian strata in two displaced terranes of the McCloud belt contain a small biconic gastropod of distinctive appearance, Vesperispira humboldtiana new genus and species. This trochiform gastropod has a strongly oblique aperture with interrupted peristome, a small sinus on the peripheral margin of the shell, and lamellose shell. This gastropod is an easily recognized biogeographic indicator of the McCloud province biota, because of its lamellose ornamentation. Occurrence of this gastropod in strata of the Pine Forest Range of northwestern Nevada provides additional evidence for including rock units of the Black Rock terrane within the McCloud Belt, a grouping of several displaced terranes along the western margin of North America (Stevens et al., 1990) that contain fossil biotas rich in endemic species.

Permian Polyplacophora, Rostroconchia, and Problematica from Oregon

2000 ◽  
Vol 74 (2) ◽  
pp. 192-198 ◽  
Author(s):  
R. A. Hanger ◽  
R. D. Hoare ◽  
E. E. Strong
Keyword(s):  
New Species ◽  
New Taxa ◽  
New Genus ◽  
Early Permian ◽  
New Genus And Species

A silicified fauna from the early Permian Coyote Butte Limestone within the Grindstone terrane of central Oregon contains a diverse fauna including five polyplacophorans, one rostroconch, and one problematic taxa. New taxa includeGryphochiton planoplatanew species,Arcochiton soccusnew species,Homeochiton triangularisnew genus and species,Arceodomus sphairikosnew species, andDiadeloplax apiculatusnew species.

scholarly journals Placas columnares de crinoideos de la Formación Las Delicias, Pérmico inferior y medio de Coahuila, México

2021 ◽  
Vol 73 (1) ◽  
pp. A040820
Author(s):  
Rafael Villanueva-Olea ◽  
Sara Alicia Quiroz-Barroso ◽  
Jesús Quiroz-Barragán ◽  
Miguel Ángel Torres-Martínez ◽  
Francisco Sour-Tovar
Keyword(s):  
New Genus ◽  
Middle Permian ◽  
Early Permian ◽  
New Genus And Species ◽  
Stratigraphic Range

Thirteen parataxa of crinoid plates from two localities of the lower-middle Permian of the Las Delicias Formation are described. Both zones are situated in Sierra de las Delicias, to southwestern Coahuila state. The parataxa Pentagonopternix coahuilensis n. sp., Cyclocaudex typicus, C. insaturatus, C. cf. insaturatus, Cyclocaudex sp., Floricyclus diminuta n. sp., Floricyclus sp. Preptopremnum rugosum, P. laeve, Preptopremnum sp., Heterostelechus keithi, Cyclocaudiculus regularis and Epicrinus torreonense new genus and species were found in Las Difuntas locality of the middle Permian (Wordian–Capitanian) whereas Cyclocaudex typicus, C. sp., Preptopremnum laeve and Epicrinus torreonense were also found in Las Sardinas locality whose strata have been dated as early Permian (Kungurian-Roadian). The occurrence of all parataxa in strata from the middle Permian of the Las Delicias Formation allowed extending their stratigraphic range until the Wordian–Capitanian. Most species described have been associated to the Grandian Paleoprovince, nonetheless, the presence of Floricyclus and Pentagonopternix parataxa in the Permian of Coahuila proves the cosmopolitan nature of both genera.

Sign in / Sign up

Export Citation Format

Share Document