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.

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.

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.

scholarly journals First record of loggerhead sea turtles Caretta caretta in Sebastián Vizcaíno Bay, Baja California Peninsula, Mexico

2020 ◽  
Vol 48 (1) ◽  
pp. 146-149
Author(s):  
Helena Fernández-Sanz ◽  
Fabián Castillo Romero ◽  
Joaquín Rivera Rodríguez ◽  
Noé López Paz ◽  
Gabriel Arturo Zaragoza Aguilar ◽  
...  
Keyword(s):  
Baja California ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Caretta Caretta ◽  
First Record ◽  
Sea Turtle ◽  
Baja California Peninsula ◽  
Loggerhead Sea Turtles ◽  
Biometric Data ◽  
Loggerhead Sea Turtle

The loggerhead sea turtle (Caretta caretta) is an endangered species which distributes around the west coast of the Baja California Peninsula. In Baja California Sur, the conservation efforts for this species were focused in the Gulf of Ulloa; however, within the Pacific coast of the Baja California Peninsula, Sebastián Vizcaíno Bay (SVB) biological active center suit the optimal conditions for the presence of loggerheads. This study aimed to investigate SVB as a potential foraging area for loggerheads. Between July and August 2018, three prospective surveys were conducted, in search of marine turtles in SVB. A total of three loggerhead turtles and one eastern Pacific green turtle (Chelonia mydas) were captured; biometric data were recorded, and organisms were classified as juveniles. This is the first report of the loggerhead sea turtles in the SVB and given the oceanographic characteristics of the bay, it is a potential foraging and development area for the species.

scholarly journals First record of hybridization between greenChelonia mydasand hawksbillEretmochelys imbricatasea turtles in the Southeast Pacific

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1712 ◽  
Author(s):  
Shaleyla Kelez ◽  
Ximena Velez-Zuazo ◽  
Aldo S. Pacheco
Keyword(s):  
Pacific Ocean ◽  
Sea Turtles ◽  
Sea Turtle ◽  
Morphological Evidence ◽  
Healthy Population ◽  
Turtle Species ◽  
East Pacific ◽  
The Pacific ◽  
Southeast Pacific ◽  
The Pacific Ocean

Hybridization among sea turtle species has been widely reported in the Atlantic Ocean, but their detection in the Pacific Ocean is limited to just two individual hybrid turtles, in the northern hemisphere. Herein, we report, for the first time in the southeast Pacific, the presence of a sea turtle hybrid between the green turtleChelonia mydasand the hawksbill turtleEretmochelys imbricata.This juvenile sea turtle was captured in northern Peru (4°13′S; 81°10′W) on the 5thof January, 2014. The individual exhibited morphological characteristics ofC. mydassuch as dark green coloration, single pair of pre-frontal scales, four post-orbital scales, and mandibular median ridge, while the presence of two claws in each frontal flipper, and elongated snout resembled the features ofE. imbricata. In addition to morphological evidence, we confirmed the hybrid status of this animal using genetic analysis of the mitochondrial gene cytochrome oxidase I, which revealed that the hybrid individual resulted from the cross between a femaleE. imbricataand a maleC. mydas. Our report extends the geographical range of occurrence of hybrid sea turtles in the Pacific Ocean, and is a significant observation of interspecific breeding between one of the world’s most critically endangered populations of sea turtles, the east PacificE. imbricata, and a relatively healthy population, the east PacificC. mydas.

New records of Swiftia (Cnidaria, Anthozoa, Octocorallia) from off the Pacific Costa Rican margin, including a new species from methane seeps

Zootaxa ◽  
2019 ◽  
Vol 4671 (3) ◽  
pp. 407-419 ◽  
Author(s):  
ODALISCA BREEDY ◽  
GREG W. ROUSE ◽  
APRIL STABBINS ◽  
JORGE CORTÉS ◽  
ERIK E. CORDES
Keyword(s):  
New Species ◽  
Costa Rica ◽  
First Record ◽  
Costa Rican ◽  
New Taxon ◽  
Methane Seeps ◽  
The Pacific ◽  
Molecular Phylogenetic ◽  
Pacific Margin ◽  
A New Species

Exploration of the deep sea off the Pacific margin of Costa Rica has resulted in the discovery of a number of new species and reports for the region. Here, we report on the occurrence of the octocoral genus Swiftia, and describe a new species collected by the Alvin submersible off the Pacific coast of Costa Rica. The new species has been observed at around 1000 m depth, growing on authigenic carbonates near methane seeps. Swiftia sahlingi sp. nov. is characterised by having bright red colonies that are with limited branching, with slightly raised polyp-mounds, thin coenenchyme mainly composed of long warty spindles, and conspicuous plates. A molecular phylogenetic analysis supports the differences between this new taxon and the closest Swiftia species. The new species represents the first record of the genus from Costa Rica and in fact for the Eastern Tropical Pacific. 

A new termite species (Isoptera: Termitidae: Termitinae: Amitermes) and first record of a Subterranean Termite from the Coastal Desert of South America

Zootaxa ◽  
2010 ◽  
Vol 2328 (1) ◽  
pp. 65 ◽  
Author(s):  
RUDOLF H. SCHEFFRAHN ◽  
JEAN-BERNARD HUCHET
Keyword(s):  
South America ◽  
First Record ◽  
Head Capsule ◽  
Subterranean Termite ◽  
Termite Species ◽  
Coastal Desert ◽  
The Pacific ◽  
Single Tooth ◽  
Cephalic Gland

At about one hundred species (Scheffrahn & Su 1987), Amitermes, is the second largest genus after Microcerotermes in the subfamily Termitinae. This cosmopolitan genus is found in a wide variety of habitats from rainforests e.g., Amitermes excellens (Silvestri) from Guyana (Emerson 1925) and Amitermes dentatus (Haviland) from Sumatra (Gathorne-Hardy et al. 2001) to deserts, e.g. Amitermes emersoni Light from Coachella, California (Light 1930) and Amitermes desertorum Desneux from Egypt (Sands 1992). Only eight species of Amitermes are known from the Neotropics and only five occur across mainland South America. Soldiers of Amitermes are characterized by a bulbous head capsule and sickle-shaped mandibles, each with a single tooth of various shapes on their inner margins. Soldiers of all species have a large cephalic gland opening to a circular fontanelle on the frons. When confronted by an agonist, the soldier emits a terpenoid secretion which oozes onto setae around and below the fontanelle (Scheffrahn et al. 1983). Herein, is described a new Amitermes from Peru and the first record of a subterranean termite along the Pacific coastal desert of South America.

scholarly journals A new titanosaur sauropod from the Atacama Desert, Chile

2011 ◽  
Vol 83 (1) ◽  
pp. 211-219 ◽  
Author(s):  
Alexander W.A. Kellner ◽  
David Rubilar-Rogers ◽  
Alexander Vargas ◽  
Mario Suárez
Keyword(s):  
New Species ◽  
South America ◽  
Upper Cretaceous ◽  
Atacama Desert ◽  
Northern Chile ◽  
Red Sandstone ◽  
Caudal Vertebrae ◽  
The Pacific ◽  
Pacific Margin ◽  
A New Species

Partial remains of a titanosaur sauropod collected in the Tolar Formation (Upper Cretaceous) at the Atacama Desert (Antofagasta Region), northern Chile, is described, and a new species, Atacamatitan chilensis gen. et sp. nov., is erected. The material consists mainly of dorsal and caudal vertebrae, part of a humerus and a femur. The presence of a titanosaur confirms the Cretaceous age for the outcrops of red sandstone of the Tolar Formation whose age was previously uncertain, ranging from the Upper Cretaceous to the Paleocene. The new specimen represents the most complete dinosaur reported for this region and one of the most complete titanosaur known from Chile and the pacific margin of South America so far.

scholarly journals Record of the Loggerhead Sea Turtle, Caretta caretta (Testudines, Cheloniidae), in the Black Sea with the Review of the Species Occurrence in the Region

Zoodiversity ◽  
2021 ◽  
Vol 55 (2) ◽  
pp. 127-132
Author(s):  
O. Zinenko ◽  
K. A. Vishnyakova ◽  
L. Stoyanov ◽  
P. E. Gol’din
Keyword(s):  
Black Sea ◽  
Sea Turtles ◽  
Caretta Caretta ◽  
First Record ◽  
Sea Turtle ◽  
The Black Sea ◽  
Loggerhead Sea Turtles ◽  
Loggerhead Sea Turtle ◽  
The North ◽  
North Western

A rare live record of the loggerhead sea turtle Caretta caretta (Linnaeus, 1758) is reported from the Dzharylgach Gulf in the north-western Black Sea. This is the first record from Ukrainian waters since 1962 and the northernmost record of the species in the Black Sea. The loggerhead sea turtles of the east Mediterranean origin are increasingly often seen in the Marmara and the Black Sea during the latest decade, which is an evidence for potential expansion of this species range, at least partly due to climate changes. Key words: sea turtles, Caretta caretta, Black Sea, Ukraine, range expansion.

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