A new cobia (Teleostei, Rachycentridae) species from the Miocene St. Marys Formation along Calvert Cliffs, Maryland, USA

2020 ◽  
pp. 1-8
Author(s):  
Stephen J. Godfrey ◽  
Giorgio Carnevale
Keyword(s):  
United States ◽  
New Species ◽  
Outer Surface ◽  
Late Miocene ◽  
Three Dimensional ◽  
Dorsal Surface ◽  
Posterior Half ◽  
Northeastern United States ◽  
Rear Edge ◽  
Lateral Ridge

Abstract The highly fossiliferous St. Marys Formation is exposed along Calvert Cliffs, Maryland, and comprises one of the best available records of late Miocene life in the northeastern United States. Rachycentron stremphaencus new species, a cobia from the late Miocene (Tortonian) of the St. Marys Formation is described herein on the basis of a single three-dimensional neurocranium. This fossil represents the earliest known occurrence of neurocranial remains of the genus Rachycentron in the record. Rachycentron stremphaencus differs from Rachycentron canadum (Linnaeus, 1766) in many ways. The most obvious include a different ornamentation of the outer surface of the cranial bones; a notably pronounced lateral ridge resulting in a considerable gradient from the dorsal-medial exposure of the frontal to its lateralmost supraorbital margin; the size, shape, and position of the sphenotic that is located in the posterior half of the neurocranium and its lateralmost edge being adjacent to the anteriormost extent of the wedge-shaped trough in the dorsal surface of the skull formed by the lateral and medial ridges; the two contralateral medial ridges forming a proportionately much wider trough on either side of the supraoccipital; the epioccipitals not reaching the rear edge of the neurocranium; and the lack of a conspicuous posterolateral prong of the intercalar. UUID: http://zoobank.org/c8523bb4-2de2-4318-9a37-027f463a0441

scholarly journals Marine Early Triassic Actinopterygii from Elko County (Nevada, USA): implications for the Smithian equatorial vertebrate eclipse

2017 ◽  
Vol 91 (5) ◽  
pp. 1025-1046 ◽  
Author(s):  
Carlo Romano ◽  
James F. Jenks ◽  
Romain Jattiot ◽  
Torsten M. Scheyer ◽  
Kevin G. Bylund ◽  
...  
Keyword(s):  
United States ◽  
New Species ◽  
Three Dimensional ◽  
Lower Triassic ◽  
The United States ◽  
Early Triassic ◽  
Equatorial Zone ◽  
New Localities ◽  
Trophic Chains ◽  
Early Late

AbstractThe Early Triassic vertebrate record from low paleolatitudes is spotty, which led to the notion of an ‘equatorial vertebrate eclipse’ during the Smithian. Here we present articulated ray-finned fishes (Actinopterygii), collected from the marine Lower Triassic Thaynes Group at three new localities in Elko County (Nevada, USA), which were deposited within the equatorial zone. From the Smithian of the Winecup Ranch, we describe two partial skulls of the predatory actinopterygianBirgeria(Birgeriidae), attributed toB.americananew species andBirgeriasp.Birgeria americanan. sp. is distinguished from other species by a less reduced operculogular series. With an estimated total length of 1.72–1.85m, it is among the largest birgeriids. We confirm thatBirgeriaencompasses species with either two or three rows of teeth on the maxilla and dentary, and suggest that species with three well-developed rows are restricted to the Early Triassic. From the latest Smithian of Palomino Ridge, we present a three-dimensional, partial skull of the longirostrine predatorSaurichthys(Saurichthyidae). This and other occurrences indicate that saurichthyids were common in the western USA basin. From the early late Spathian of Crittenden Springs, we describe a posterior body portion (Actinopterygii indet.). This find is important given the paucity of Spathian osteichthyan sites. We provide a summary of Early Triassic vertebrate occurrences in the United States, concluding that vertebrate fossils remain largely unstudied. The presence of predatory vertebrates in subequatorial latitudes during the Smithian confirms that Early Triassic trophic chains were not shortened and contradicts the ‘equatorial vertebrate eclipse’.

Three New Species of Leaf-Mining Gelechiidae (Lepidoptera) from Canada and Northeastern United States

2014 ◽  
Vol 68 (2) ◽  
pp. 101-123 ◽  
Author(s):  
David Adamski ◽  
Jean-François Landry ◽  
Vazrick Nazari ◽  
Ronald J. Priest
Keyword(s):  
United States ◽  
New Species ◽  
Northeastern United States ◽  
Leaf Mining ◽  
Three New Species

AMERICAN SPECIES OF DIORYCTRIA (LEPIDOPTERA: PYRALIDAE) VI. A NEW SPECIES OF DIORYCTRIA FROM EASTERN CANADA AND NORTHEASTERN UNITED STATES

1982 ◽  
Vol 114 (11) ◽  
pp. 1069-1076 ◽  
Author(s):  
Akira Mutuura
Keyword(s):  
United States ◽  
New Species ◽  
Red Pine ◽  
Northeastern United States ◽  
Eastern Canada ◽  
Southern Ontario ◽  
Ecological Aspects ◽  
Lepidoptera Pyralidae ◽  
Pine Cones ◽  
A New Species

AbstractDioryctria resinosella, a species feeding on red pine cones or shoots, is described as new and recorded from Maine, southern Ontario, Wisconsin, and Minnesota. The new species is distinguished from D. zimmermani (Grote) and D. banksiella Mutuura & Munroe by the differences in wing markings, genitalia characters, and ecological aspects.

A New Species of Potamogeton (Potamogetonaceae) from Northeastern United States

1983 ◽  
Vol 8 (1) ◽  
pp. 86 ◽  
Author(s):  
C. Barre Hellquist ◽  
Robert L. Hilton
Keyword(s):  
United States ◽  
New Species ◽  
Northeastern United States ◽  
A New Species

Diversity of Gyroporus (Gyroporaceae, Boletales): rpb2 phylogeny and three new species

Phytotaxa ◽  
2020 ◽  
Vol 434 (3) ◽  
pp. 208-218
Author(s):  
NAVEED DAVOODIAN ◽  
KENTARO HOSAKA ◽  
OLIVIER RASPÉ ◽  
OLIVIA A. ASHER ◽  
ALAN R. FRANCK ◽  
...  
Keyword(s):  
United States ◽  
New Species ◽  
Southern Hemisphere ◽  
Great Plains ◽  
Appalachian Mountains ◽  
Distinct Species ◽  
The United States ◽  
Northeastern United States ◽  
Three New Species ◽  
Landscape Trees

Three new species of Gyroporus, one from the southern hemisphere (Gyroporus madagascariensis sp. nov.) and two from the northern hemisphere (Gyroporus borealis sp. nov. and Gyroporus smithii sp. nov.), are described. G. madagascariensis is a brownish bolete currently known from Madagascar; it has a mottled pileus somewhat reminiscent of G. mcnabbii, another species known from the southern hemisphere. G. borealis is known from the northeastern United States and is also recorded from the northwestern United States under planted landscape trees. G. smithii corresponds to an orange-colored species that has often been encountered in the United States west and south of the Appalachian Mountains (east of the Great Plains) and is likely often mistaken for G. borealis, which can display orange coloration. Additionally, this study presents evidence that G. roseialbus Murrill and G. subalbellus Murrill, previously synonymized by Rolf Singer, are in fact distinct species.

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