scholarly journals An enigmatic aquatic snake from the Cenomanian of Northern South America

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2027 ◽  
Author(s):  
Adriana Albino ◽  
Jorge D. Carrillo-Briceño ◽  
James M. Neenan
Keyword(s):  
South America ◽  
Vertebral Column ◽  
First Record ◽  
New Taxon ◽  
Fossil Material ◽  
Mode Of Life ◽  
Aquatic Mode ◽  
Systematic Relationships ◽  
Northern South America ◽  
La Luna

We report the first record of a snake from the Cretaceous of northern South America. The remains come from the La Luna Formation (La Aguada Member, Cenomanian of Venezuela) and consist of several vertebrae, which belong to the precloacal region of the vertebral column. Comparisons to extant and extinct snakes show that the remains represent a new taxon,Lunaophis aquaticusgen. et sp nov. An aquatic mode of life is supported by the ventral position of the ribs, indicating a laterally compressed body. The systematic relationships of this new taxon are difficult to determine due to the scarcity of fossil material; it is, however, a representative of an early lineage of snakes that exploited tropical marine pelagic environments, as reflected by the depositional conditions of the La Aguada Member.Lunaophisis also the first aquatic snake from the Cenomanian found outside of the African and European Tethyan and Boreal Zones.

scholarly journals First record of Ramphocorixa rotundocephala Hungerford, 1927 (Hemiptera, Corixidae) for Colombia

Check List ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 503-506
Author(s):  
Mabel Giovana Pimiento-Ortega ◽  
Isabella González-Gamboa ◽  
Yimy Herrera-Martínez
Keyword(s):  
North America ◽  
South America ◽  
Procambarus Clarkii ◽  
Aquatic Insect ◽  
First Record ◽  
Adult Males ◽  
Northern South America ◽  
The Town

In the course of research conducted on Procambarus clarkii (Girard, 1852) in Colombia, Ramphocorixa rotundocephala Hungerford, 1927 was collected in Güitoque Lake, outside the town of Gachantivá, Boyacá. The species was identified from the adult males found there. This species of aquatic insect occurs mostly in Central and North America, but there are also two records from Venezuela in South America. This is the first record of this species and its genus for Colombia. This finding increases this species’ known distribution on the continent and the diversity of hemipterans in northern South America.

A novel late Early Miocene assemblage of terrestrial gastropods from Santa Cruz (Patagonia, Argentina)

2015 ◽  
Vol 89 (5) ◽  
pp. 748-761 ◽  
Author(s):  
Sergio E. Miquel ◽  
Pablo E. Rodriguez
Keyword(s):  
South America ◽  
New Taxa ◽  
Vegetation Cover ◽  
First Record ◽  
Early Miocene ◽  
New Taxon ◽  
Santa Cruz ◽  
Dense Vegetation ◽  
Humid Environment ◽  
New Information

AbstractA remarkable fossil assemblage composed of five gastropod taxa is described from the Early Miocene of Santa Cruz (Patagonia, Argentina) in southernmost South America. The assemblage includes extinct and living genera South America, and on geographic distributions and represent background new information on spatial and across time distributions as well as identification of new taxa. A new taxon,Patagocharopa enigmatican. gen. n. sp., is tentatively assigned to Charopidae.Gastrocopta patagonican. sp. (Vertiginidae) represents the oldest record ofGastrocoptain Argentina and the southernmost record for the Americas.Punctum patagonicumn. sp. (Punctidae) represents the first record ofPunctumfor continental South America, and characterized by a protoconch with traces of axial costulae and a teleoconch with strong radial ribs.Zilchogyra miocenican. sp. is the first Miocene record of the charopid genusZilchogyra. Fragments of a possibleScolodonta(Scolodontidae) are recorded. Overall, the assemblage represents an important and useful paleoenvironmental tool. This fauna suggests that a more temperate and humid environment than today—with a more dense vegetation cover—was prevalent at this site during the Early Miocene.

A new highland species of Pristimantis Jiménez de la Espada, 1871 (Anura: Strabomantidae) from the Pantepui region, northern South America

Zootaxa ◽  
2011 ◽  
Vol 2934 (1) ◽  
pp. 1 ◽  
Author(s):  
PHILIPPE J. R. KOK ◽  
D. BRUCE MEANS ◽  
FRANKY BOSSUYT
Keyword(s):  
New Species ◽  
South America ◽  
Dominant Frequency ◽  
New Taxon ◽  
Internal Organs ◽  
Golden Yellow ◽  
Northern South America ◽  
Pattern Polymorphism ◽  
High Degree ◽  
Ventral Skin

A new strabomantid frog of the genus Pristimantis Jiménez de la Espada, 1871 is described from the Eastern Pantepui Region, Guiana Shield, northern South America. The new species, Pristimantis aureoventris sp. nov., is known so far from two neighbouring tepuis, namely Wei Assipu Tepui (type locality) at the border between Guyana and Brazil and Mount Roraima in Guyana, and occurs between 2210–2305 m elevation. The new taxon is distinguished from all known congeners by the following combination of characters: Finger I < II; tympanum distinct; basal webbing between Toes IV-V; broad lateral fringes on fingers and toes; ventral skin areolate; vocal slits absent in male; two non-spinous whitish nuptial pads and vocal sac present in male; high degree of pattern polymorphism; throat, chest, and belly golden yellow, usually with reddish brown to dark brown mottling; internal organs little or not visible through the ventral skin in life. The call of the new species consists of bouts of a single amplitude-modulated (decreasing to the end) note repeated at a rate of ca. 18 notes/min with a dominant frequency ranging from 2180 to 2430 Hz.

scholarly journals A new enigmatic Late Miocene mylodontoid sloth from northern South America

2015 ◽  
Vol 2 (2) ◽  
pp. 140256 ◽  
Author(s):  
Ascanio D. Rincón ◽  
H. Gregory McDonald ◽  
Andrés Solórzano ◽  
Mónica Núñez Flores ◽  
Damián Ruiz-Ramoni
Keyword(s):  
South America ◽  
Late Miocene ◽  
Preliminary Analysis ◽  
New Genus ◽  
New Taxon ◽  
New Genus And Species ◽  
Consensus Tree ◽  
Discriminate Analysis ◽  
Northern South America ◽  
Phylogenetic Affinities

A new genus and species of sloth ( Eionaletherium tanycnemius gen. et sp. nov.) recently collected from the Late Miocene Urumaco Formation, Venezuela (northern South America) is herein described based on a partial skeleton including associated femora and tibiae. In order to make a preliminary analysis of the phylogenetic affinities of this new sloth we performed a discriminate analysis based on several characters of the femur and tibia of selected Mylodontoidea and Megatherioidea sloths. The consensus tree produced indicates that the new sloth, E. tanycnemius , is a member of the Mylodontoidea. Surprisingly, the new taxon shows some enigmatic features among Neogene mylodontoid sloths, e.g. femur with a robust lesser trochanter that projects medially and the straight distinctly elongated tibia. The discovery of E. tanycnemius increases the diversity of sloths present in the Urumaco sequence to ten taxa. This taxon supports previous studies of the sloth assemblage from the Urumaco sequence as it further indicates that there are several sloth lineages present that are unknown from the better sampled areas of southern South America.

scholarly journals The first Oligocene sea turtle (Pan-Cheloniidae) record of South America

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4554 ◽  
Author(s):  
Edwin Cadena ◽  
Juan Abella ◽  
Maria Gregori
Keyword(s):  
South America ◽  
Sea Turtles ◽  
Dorsal Surface ◽  
First Record ◽  
Sea Turtle ◽  
Fossil Material ◽  
The Pacific ◽  
Pacific Margin ◽  
Lateral Portion ◽  
Santa Elena

The evolution and occurrence of fossil sea turtles at the Pacific margin of South America is poorly known and restricted to Neogene (Miocene/Pliocene) findings from the Pisco Formation, Peru. Here we report and describe the first record of Oligocene (late Oligocene, ∼24 Ma) Pan-Cheloniidae sea turtle remains of South America. The fossil material corresponds to a single, isolated and well-preserved costal bone found at the Montañita/Olón locality, Santa Elena Province, Ecuador. Comparisons with other Oligocene and extant representatives allow us to confirm that belongs to a sea turtle characterized by: lack of lateral ossification, allowing the dorsal exposure of the distal end of ribs; dorsal surface of bone sculptured, changing from dense vermiculation at the vertebral scute region to anastomosing pattern of grooves at the most lateral portion of the costal. This fossil finding shows the high potential that the Ecuadorian Oligocene outcrops have in order to explore the evolution and paleobiogeography distribution of sea turtles by the time that the Pacific and the Atlantic oceans were connected via the Panama basin.

First record and a new species of Megarthrus Curtis (Coleoptera, Staphylinidae, Proteininae) from the Colombian Central Andes

Zootaxa ◽  
2011 ◽  
Vol 2916 (1) ◽  
pp. 62
Author(s):  
MARGARITA M. LÓPEZ-GARCÍA ◽  
DIANA M. Méndez-Rojas ◽  
JOSÉ LUÍS NAVARRETE-HEREDIA
Keyword(s):  
New Species ◽  
South America ◽  
Central America ◽  
First Record ◽  
Central Andes ◽  
South American ◽  
The South ◽  
The World ◽  
Northern South America ◽  
A New Species

The genus Megarthrus Curtis 1829 with about 139 species described around the world, is the largest of the subfamily Proteininae (Coleoptera: Staphylinidae) (Cuccodoro 2011). Megarthrus is distributed worldwide (Cuccodoro 1999) but it is apparently more diverse in the Holartic region (Navarrete-Heredia et al. 2002). However, the South American fauna is underestimated because many of the collected specimens are not yet described (Cuccodoro 2011). Newton et al. (2005) cited the genus as probable in Colombia because some species are known from Central America and northern South America, but until now, no species has been published from Colombia. Therefore, M. andinus sp. nov. represents the first record of the genus and subfamily for this country.

scholarly journals Filling a gap in the distribution of Scinax rostratus (Peters, 1863) (Anura, Hylidae) in northern Brazil, with further data on its advertisement call

Check List ◽  
2017 ◽  
Vol 13 (3) ◽  
pp. 2150 ◽  
Author(s):  
Davi Lee Bang ◽  
Ariovaldo Antonio Giaretta
Keyword(s):  
South America ◽  
Species Distribution ◽  
First Record ◽  
Advertisement Call ◽  
Spectral Structure ◽  
Large Species ◽  
Fine Scale ◽  
Emission Pattern ◽  
Northern Brazil ◽  
Northern South America

Scinax rostratus is a large species of the S. rostratus group and has an extensive distribution throughout northern South America. We provide the first record of S. rostratus from the state of Roraima (municipality of Cantá), which fills a previously assumed gap in this species’ distribution. We also describe the species’ advertisement call from this locality, providing further notes on the call emission pattern and fine scale temporal and spectral structure.

scholarly journals An aberrant record of Hoatzin Opisthocomus hoazin (Statius Muller, 1976) (Aves: Opisthocomidae) in Venezuela

Check List ◽  
2014 ◽  
Vol 10 (1) ◽  
pp. 153
Author(s):  
Galo Buitrón-Jurado
Keyword(s):  
South America ◽  
National Park ◽  
Cloud Forest ◽  
Field Work ◽  
First Record ◽  
The Andes ◽  
Northern South America

I report an aberrant record of Hoatzin Opisthocomus hoazin in the Andes of Lara, Venezuela. During field work in July 2011 in the Yacambú National Park, in an area of premontane cloud forest, I observed and photographed an individual of O. hoazin in El Blanquito reservoir. This is the first record of the species in Lara State, and apparently the highest record of the species in northern South America.

scholarly journals The first Paleogene (Oligocene) sea turtle record of South America

2018 ◽  
Author(s):  
Edwin Cadena ◽  
Juan Abella ◽  
Maria Gregori
Keyword(s):  
South America ◽  
Sea Turtles ◽  
Dorsal Surface ◽  
First Record ◽  
Sea Turtle ◽  
Fossil Material ◽  
The Pacific ◽  
Pacific Margin ◽  
Lateral Portion ◽  
Santa Elena

The evolution and occurrence of fossil sea turtles at the Pacific margin of South America is poorly known and restricted to Neogene (Miocene) findings from Perú. Here we report and describe the first record of Paleogene (Late Oligocene, ~24 Ma) sea turtle remains. The fossil material corresponds to a single, isolated and well-preserved costal bone found at the Montañita/Olón locality, Santa Elena Province, Ecuador. Comparisons with other Oligocene and extant representatives allow us to confirm that belong to a sea turtle characterized by: lack of lateral ossification, allowing the dorsal exposure of the distal end of ribs; dorsal surface of bone sculptured, changing from dense vermiculation at the vertebral scute region and changing to anastomosing pattern of grooves at the most lateral portion of the costal. This fossil finding shows the high potential that the Ecuadorian Paleogene outcrops have in order to explore the evolution and paleobiogeography distribution of sea turtles by the time that the Pacific and the Atlantic oceans were connected via the Panama basin.

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