scholarly journals PRIMER REGISTRO DEL GENERO Echineulima LUTZEN Y NIELSEN (GASTROPODA: EULIMIDAE), MOLUSCOS PARASITOS DE ERIZOS DE MAR EN LA ISLA DE GORGONA (PACIFICO COLOMBIANO

2016 ◽  
Vol 17 ◽  
Author(s):  
Jaime Ricardo Cantera K. ◽  
Raúl Neira O.
Keyword(s):  
Coral Reefs ◽  
Geographical Distribution ◽  
Sea Urchin ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
First Time

This paper reports for the first time for the tropical Eastern Pacific the genus Echineulima (Gastropoda: Eulimidae), a parasite of the sea urchin Centrostephanus coronatus, in coral reefs of Gorgona Island at 2 4 m depth. It seems likely that it is an undescribedspecies. This paper presents information abftut the snail including a brief description, size, habitat, and considerations about the effects of the parasite on the sea urchin. A discussión about the geographical distribution of the genus is also presented.

scholarly journals Molluscan diversification and extinction on opposite sides of the Isthmus of Panama

1992 ◽  
Vol 6 ◽  
pp. 144-144
Author(s):  
Jeremy B. C. Jackson ◽  
Peter Jung
Keyword(s):  
Late Miocene ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
Early Pliocene ◽  
Isthmus Of Panama ◽  
Late Neogene ◽  
Tropical America ◽  
The Caribbean ◽  
First Time ◽  
Final Closure

Molluscs are the most diverse and abundant tropical American macrofossils, but their distributions and evolution are not well understood. Classic studies by Olsson and Woodring documented a rich Late Miocene to Early Pliocene “Gatunian” fauna throughout the Caribbean and tropical Eastern Pacific, with many species in common between the oceans. This fauna was divided by formation of the Isthmus of Panama, and diverged into distinct Pacific and Caribbean faunas sometime thereafter. Diversity also decreased by about half in the Caribbean. However, the timing, rates and correlation of these major biological changes with changes in environmental conditions have not been resolved because of imprecise dating and taxonomy and failure to consider problems of sampling and biofacies in biological comparisons. We used the newly revised late Neogene stratigraphy for Panama and Costa Rica to date for the first time the radiation and extinction of molluscs on opposite sides of the Isthmus. Data include occurrences throughout tropical America for nearly 100 species of the Strombina-group (Gastropoda, Columbellidae) and for more than 500 gastropod and bivalve genera from 240 Late Miocene to Pleistocene isthmian collections.All evidence suggests that final closure of the Isthmus of Panama occurred between 3.5 and 2.5 My. Subgeneric divergence between the oceans was well developed, and trans-isthmian species were rare by the Early Pliocene, at least 2 Ma before final closure. Caribbean diversity remained high until 1.8 to 1.5 Ma when massive but selective extinction occurred. This was at least 1 Ma after final closure of the Isthmus, and may be correlated with onset of slightly cooler Caribbean sea surface temperatures in the Pleistocene. In contrast, Eastern Pacific diversity did not decline, and even increased during the Pleistocene.

scholarly journals Filling the gaps: first record of the Crown-of-thorns Starfish, Acanthaster planci (Linnaeus, 1758) (Spinulosida: Acanthasteridae), at Gorgona Island, Colombia, Tropical Eastern Pacific

Check List ◽  
2017 ◽  
Vol 13 (3) ◽  
pp. 2112
Author(s):  
Fernando A. Zapata ◽  
María Del Mar Palacios ◽  
Valentina Zambrano ◽  
Melina Rodríguez-Moreno
Keyword(s):  
Coral Reefs ◽  
Geographic Distribution ◽  
First Record ◽  
Eastern Pacific ◽  
Pocillopora Damicornis ◽  
Acanthaster Planci ◽  
Tropical Eastern Pacific

We report the occurrence of a major corallivore, the Crown-of-thorns Starfish Acanthaster planci, on the coral reefs of Gorgona Island, Tropical Eastern Pacific. Three individuals were sighted on opposite sides of the island, where they fed on small coral colonies of Pavona varians and Pocillopora damicornis. These sightings are noteworthy in light of reports that have demonstrated that the geographic distribution of A. planci is gradually increasing in the equatorial eastern Pacific, particularly south of the Gulf of Chiriquí (Panama) where it was previously absent.

Fish diversity divergence between tropical eastern pacific and tropical western Atlantic coral reefs

2020 ◽  
Vol 103 (11) ◽  
pp. 1323-1341
Author(s):  
Manuel Olán-González ◽  
Héctor Reyes-Bonilla ◽  
Lorenzo Álvarez-Filip ◽  
Horacio Pérez-España ◽  
Damien Olivier
Keyword(s):  
Coral Reefs ◽  
Eastern Pacific ◽  
Fish Diversity ◽  
Tropical Eastern Pacific ◽  
Western Atlantic

scholarly journals Current Ecological Status of Remote Coral Reefs of Clipperton Island, Tropical Eastern Pacific

2021 ◽  
Author(s):  
Claudia Pogoreutz ◽  
Eric E. G. Clua ◽  
JOSE DE JESUS ADOLFO TORTOLERO LANGARICA
Keyword(s):  
Coral Reefs ◽  
Coral Cover ◽  
Ecological Status ◽  
Parasite Prevalence ◽  
Coral Community ◽  
Eastern Pacific ◽  
Marine Biodiversity ◽  
Live Coral ◽  
Tropical Eastern Pacific ◽  
Live Coral Cover

Abstract Clipperton, an uninhabited and remote coral atoll from the Eastern Pacific, is an important steppingstone area that harbors a high marine biodiversity. Despite its biogeographic importance, little information on the ecological status of its coral reefs is available from the last decade. Herein, we characterized the benthic coral community and health status among four different shallow reef-zones (North to South) of Clipperton during the Tara Pacific expedition in 2018. The benthic composition and coverage percentage, as well as occurrence of a pink-spotted coral phenotype (trematodiasis infection) was assessed. Total live coral cover on Clipperton reefs was 66% (55-85%), differing between sites, with massive Porites and branching Pocillopora corals dominating the benthic community with an average 48% (32-66%), and 15% (3-21%), respectively. While Clipperton reefs exhibited significant live coral cover overall, the trematode infection was commonly observed, with a higher occurrence in massive corals (Porites 27%, and Pavona 31%). This observation is possibly related to the combined effects of previously heatwaves, and local inputs of guano-derived nutrients discharged during storms and hurricanes. These results demonstrates that even highly remote reefs supporting high coral cover can be subjected to local and global threats, including but not limited to parasite prevalence, likely in relation to natural disturbances such as thermal stress and tropical cyclones.

scholarly journals New records of Demospongiae (Porifera) from Reserva Marina El Pelado (Santa Elena, Ecuador), with description of Tedania (Tedania) ecuadoriensis sp. nov.

ZooKeys ◽  
2021 ◽  
Vol 1011 ◽  
pp. 101-120
Author(s):  
Karla B. Jaramillo ◽  
Báslavi Cóndor-Luján ◽  
Belinda Longakit ◽  
Jenny Rodriguez ◽  
Olivier P. Thomas ◽  
...  
Keyword(s):  
Protected Area ◽  
New Records ◽  
Marine Protected Area ◽  
Eastern Pacific ◽  
Shallow Waters ◽  
Tropical Eastern Pacific ◽  
Taxonomic Descriptions ◽  
Sponge Diversity ◽  
First Time ◽  
Santa Elena

The first taxonomic descriptions of the sponge diversity at El Pelado Marine Protected Area in the province of Santa Elena, Ecuador is reported. Tedania (Tedania) ecuadoriensis Jaramillo & Hajdu, sp. nov. is described from its shallow waters. In addition, Callyspongia (Callyspongia) aff. californica (sensuCruz-Barraza and Carballo 2008; nonsensuDickinson 1945) and Cliona aff. euryphylle are reported for the first time. The former species is likely distributed over 4,000 km along the Tropical Eastern Pacific, whereas the latter might be an example of a trans-isthmian lineage. An amended diagnosis for Callyspongia (Callyspongia) and an updated identification key for the subgenera of Callyspongia are provided.

Chrysopetalids (Phyllodocida: Chrysopetalidae) from the southern Mexican Pacific, including a new species

Zootaxa ◽  
2018 ◽  
Vol 4521 (1) ◽  
pp. 61 ◽  
Author(s):  
CHRISTOPHER CRUZ-GÓMEZ ◽  
J. ROLANDO BASTIDA-ZAVALA
Keyword(s):  
New Species ◽  
Pacific Coast ◽  
New Records ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
Mexican Pacific ◽  
The Pacific ◽  
The Family ◽  
First Time ◽  
A New Species

The family Chrysopetalidae has been poorly studied from the Pacific coast of Mexico compared to other families. Specifically from the southern Mexican Pacific, only two species of the family have been recorded in previous studies, Chrysopetalum occidentale and Paleanotus chrysolepis. In this study 311 specimens were revised, and nine species, belonging to six genera were found. Eight of these species are new records from the southern Mexican Pacific coast: Arichlidon watsonae n. sp., Bhawania cf. goodei, Chrysopetalum elegantoides, C. maculata, Hyalopale sp., Paleaequor psamathe, Paleanotus bellis and P. purpurea. A new species is also described, Arichlidon watsonae n. sp., which is characterized by the curved tips blades of the falcigers and their small and ovoid palps. Additionally, the genera Arichlidon and Hyalopale are recorded by first time from the Tropical Eastern Pacific. 

The eastern Pacific species of Salmoneus Holthuis, 1955, with description of a remarkable new species from Las Perlas Archipelago, Panama  (Malacostraca: Decapoda: Alpheidae)

Zootaxa ◽  
2019 ◽  
Vol 4651 (1) ◽  
pp. 125-140 ◽  
Author(s):  
ARTHUR ANKER
Keyword(s):  
New Species ◽  
Pacific Coast ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
Type Specimens ◽  
Shark Teeth ◽  
The Pacific ◽  
First Time ◽  
Pacific Species ◽  
Alpheid Shrimp

The present study deals with five species of the alpheid shrimp genus Salmoneus Holthuis, 1955 from the tropical eastern Pacific. One of them is new to science and is described as Salmoneus tiburon sp. nov. The new species is presently known only from the Las Perlas Archipelago in Panama and can be distinguished from all other congeners by the dentition on the cutting edges of the major chela, with some dactylar teeth reminiscent of shark teeth. It is also one of the largest species of the genus, with the carapace length of both type specimens surpassing 8.0 mm. Salmoneus serratidigitus (Coutière, 1897), a species with an ample distribution across the Indo-Pacific, is recorded for the first time from the Pacific coast of Panama and is confirmed from Colombia. Salmoneus malagensis Anker & Lazarus, 2015, previously known only from Bahía Málaga in Colombia, is recorded from Panama’s Azuero Peninsula. The remaining two species, S. excavatus Anker, 2011 and S. alvarezi Anker & Lazarus, 2015, are recorded regionally from Las Perlas Archipelago in Panama and Playa Tarcoles in Costa Rica, both for the first time since their original descriptions. An identification key to the five currently known eastern Pacific species of Salmoneus is provided. However, several immature and/or incomplete specimens herein preliminarily reported as Salmoneus spp., as well photographic records from southern California, USA, indicate the presence of further undescribed species in the eastern Pacific. 

New coral reef boring sponges (Hadromerida: Clionaidae) from the Mexican Pacific Ocean

2006 ◽  
Vol 86 (5) ◽  
pp. 963-970 ◽  
Author(s):  
Eric Bautista-Guerrero ◽  
José Luis Carballo ◽  
José Antonio Cruz-Barraza ◽  
Héctor H. Nava
Keyword(s):  
Coral Reef ◽  
Pacific Ocean ◽  
Coral Reefs ◽  
Growth Form ◽  
Eastern Pacific ◽  
Eastern Pacific Ocean ◽  
Mexican Pacific ◽  
First Time ◽  
Boring Sponges

Two alpha growth form species of boring sponges, Clionapocillopora sp. nov. and Cliona mucronata are described from coral reefs in the Mexican Pacific Ocean. Clionapocillopora sp. nov. is a light brown sponge containing tylostyles that measure 146×5 μm. Tylostyles are generally curved and have a globular or mucronated head, sometimes placed at some distance from the proximal end. In addition, straight, short and thick tylostrongyles and centrotylote oxea occasionally appear. Cliona mucronata is reported for the first time in the eastern Pacific Ocean. It is a red to red-orange sponge with two types of tylostyles, long and slender tylostyles, and short ensiform tylostyles. Both species have been found exclusively excavating corals of the genus Pocillopora. The boring activity of Clionapocillopora sp. nov. produces a network of galleries with mainly rectangular or polygonal chambers measuring from 0.7 to 2.4 mm in diameter, and C. mucronata produces a network of reticulate galleries with irregularly spherical or ovoid chambers 1.14×0.67 mm in diameter.

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