Integrated paleontologic and paleomagnetic stratigraphy of the upper Neogene deposits around Limon, Costa Rica: A coastal emergence record of the Central American Isthmus

2000 ◽  
Vol 112 (7) ◽  
pp. 963-981 ◽  
Author(s):  
D.F. McNeill ◽  
A.G. Coates ◽  
A.F. Budd ◽  
P.F. Borne
Keyword(s):  
Costa Rica ◽  
Central American ◽  
Central American Isthmus

scholarly journals Graphic correlation of deep sea and shallow marine deposits from the Central American Isthmus region: implications for Late Neogene paleoclimatology

1992 ◽  
Vol 6 ◽  
pp. 88-88
Author(s):  
Harry J. Dowsett
Keyword(s):  
Costa Rica ◽  
High Resolution ◽  
Ocean Circulation ◽  
Deep Sea ◽  
Sea Surface ◽  
Central American ◽  
Major Barrier ◽  
Late Neogene ◽  
The Caribbean ◽  
Central American Isthmus

The stratigraphic record in Panama and Costa Rica preserves the biologic and climatic changes associated with the formation of a major barrier to marine migration and ocean circulation. Creating a high resolution temporal framework within which stratigraphic sections found on the Isthmus can be interpreted is fundamental to our understanding the history and importance of these units.The Isthmus contains rich marine macro- and microfaunas and floras on both the Pacific and Atlantic margins. Planktic foraminifers and calcareous nannofossils are common and often well preserved. Preliminary analysis of these fossils reveals a rich sedimentary record spanning the Late Miocene to Pleistocene. Multivariate statistical analyses of these assemblages provide environmental estimates. Unfortunately, traditional methods of biostratigraphy are limited in their ability to create a high resolution temporal framework for the region. For example, a majority of deposits analyzed can be placed in planktic foraminiferal zone N19 (early Pliocene). In order to answer paleobiologic and paleoclimatic questions one requires more precise correlations between sections and some indication of duration of sedimentation represented by various sections.In an attempt to overcome the shortcomings of traditional biostratigraphic methods, the Graphic Correlation method has been applied to selected sequences on the Central American Isthmus. Graphic correlation (GC) is a procedure by which two sequences can be compared and correlated using a wide variety of stratigraphic information simultaneously. A GC model of late Neogene planktic foraminifer, calcareous nannofossil, and paleomagnetic reversal events has been produced through compositing of more than 26 deep sea cores and ocean margin sequences. Following routine GC procedures the positions of all fossil first and last occurrences from a number of sections on the Caribbean and Pacific sides of the Central American Isthmus (Panama and Costa Rica) have been recorded. These sections have been correlated to the GC model and hence, to each other, providing a temporal framework for the Isthmus units.Selected sections were then correlated to other sequences such as near-by deep sea cores which have been analyzed for sea surface temperature and salinity to gain a better understanding of the overall paleoceanographic development of the region between 5 and 2 Ma. For example, correlation of units on the Caribbean side of the Isthmus with DSDP Site 502 indicates little to no change in sea surface temperatures during the entire time the Isthmus was reaching closure. Mid-to-high latitude sites exhibit amplification of warming with increasing latitude. The shoaling Isthmus, while having negligible effects on tropical marine temperatures, was responsible for increased meridional heat transport which resulted in a North Atlantic warming about 3 Ma. A general model for paleoceanographic changes during the time of closure will be discussed.

Plagiothecium lucidum (Hook. f. & Wils.) Paris in tropical Africa

2000 ◽  
Vol 18 (1) ◽  
pp. 147-152 ◽  
Author(s):  
Ryszard Ochyra ◽  
Rafa Kempa ◽  
William R. Buck
Keyword(s):  
Costa Rica ◽  
Central America ◽  
Central American ◽  
Type Material ◽  
Distribution Map ◽  
Tropical Africa ◽  
African Plants ◽  
World Distribution ◽  
Central American Isthmus

Plagiothecium lucidum (Hook. f. & Wils.) Paris is confirmed as a new addition to the bryoflora of tropical Africa on the basis of two collections from the Bale Mountains in Ethiopia. The type material of Isopterygium integrifolium Bartr. from Costa Rica in Central America is evaluated and this species is considered to be conspecific with P. lucidum. As a result of this taxonomic conclusion the range of this species is extended to Costa Rica and this is the first recognition of this species in the Central American isthmus. A world distribution map for this species is presented and some details of African plants and the type of I. integrifolium are illustrated.

Occurrence and biogeographic significance of Heliaster (Echinodermata: Asteroidea) from the Pliocene of southwest Florida

1988 ◽  
Vol 62 (01) ◽  
pp. 126-132 ◽  
Author(s):  
Douglas S. Jones ◽  
Roger W. Portell
Keyword(s):  
Central American ◽  
Eastern Pacific ◽  
Whole Body ◽  
Marine Fauna ◽  
Western Atlantic ◽  
Southwest Florida ◽  
Extant Species ◽  
Geologic Record ◽  
Central American Isthmus

Whole body asteroid fossils are rare in the geologic record and previously unreported from the Cenozoic of Florida. However, specimens of the extant species,Heliaster microbrachiusXantus, were recently discovered in upper Pliocene deposits. This marks the first reported fossil occurrence of the monogeneric Heliasteridae, a group today confined to the eastern Pacific. This discovery provides further non-molluscan evidence of the close similarities between the Neogene marine fauna of Florida and the modern fauna of the eastern Pacific. The extinction of the heliasters in the western Atlantic is consistent with the pattern of many other marine groups in the region which suffered impoverishment following uplift of the Central American isthmus.

Redescription of the Central American genus Moribaetis Waltz & McCafferty 1985 (Ephemeroptera, Baetidae)

Zootaxa ◽  
2018 ◽  
Vol 4521 (2) ◽  
pp. 231
Author(s):  
NIKITA J. KLUGE ◽  
JUAN A. BERNAL VEGA
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Type Species ◽  
Central American ◽  
Type Locality ◽  
New Combination ◽  
Single Male ◽  
Male And Female ◽  
A New Species

A new definition for the genus Moribaetis Waltz & McCafferty 1985 is given. Its type species, Moribaetis maculipennis (Flowers 1979) is redescribed based on male and female imagoes reared from larvae near the type locality in Panama. Larvae, formerly wrongly attributed to Moribaetis salvini (Eaton 1885), and a male imago, formerly wrongly attributed to Moribaetis macaferti Waltz 1985, belong to a new species Moribaetis latipennis sp. n., which is described here based on a male imago reared from larva in Panama. Both species, M. maculipennis and M. latipennis sp. n., are distinct from M. salvini, which is known as a single male imago (lectotype) from Costa Rica. All other species, formerly attributed to Moribaetis, are excluded from this genus; a new combination Caribaetis macaferti comb. n. is proposed for the species originally described as Moribaetis macaferti Waltz (in Waltz & McCafferty) 1985, and a new combination Baetis (Rhodobaetis) mimbresaurus comb. n. is proposed for the species originally described as Moribaetis mimbresaurus McCafferty 2007. 

scholarly journals Quality Control of a Boldo Tisanes Brand Commercialized in Costa Rica Following the Central American Technical Regulation for Natural Products

2020 ◽  
Vol 06 (01) ◽  
pp. 123-132
Author(s):  
Gamboa Camacho Stefanny ◽  
Gonzalez Vargas Omar ◽  
Guevara Saborio Gloriana ◽  
Murillo Castillo Brayan ◽  
Loria Gutierrez Arlene ◽  
...  
Keyword(s):  
Quality Control ◽  
Natural Products ◽  
Costa Rica ◽  
Central American ◽  
Technical Regulation

scholarly journals Physicochemical and Microbiological Assays for Quality Evaluation of a Brand of Mentha piperita Tisanes in Costa Rica Market: Employment of the Central American Technical Regulation

2018 ◽  
Vol 8 (5) ◽  
pp. 329-337 ◽  
Author(s):  
Juan José Mora Román ◽  
Natalia Agüero Brenes ◽  
Camila Angulo Morales ◽  
Jose Castro Solís ◽  
Gabriela Hidalgo Carrillo ◽  
...  
Keyword(s):  
Quality Control ◽  
Costa Rica ◽  
Pharmaceutical Products ◽  
Central American ◽  
Mentha Piperita ◽  
Quantitative Composition ◽  
Technical Regulation ◽  
Mentha Spicata ◽  
Mentha Aquatica ◽  
Batch Number

Mentha piperita is a natural hybrid of water mint (Mentha aquatica) and spearmint (Mentha spicata L.), that are consumed as tisanes. For that reason, the present work evaluated physicochemical and microbiological aspects for the quality control of a commercial brand of Mentha piperita herbal tea distributed in Costa Rica, using assays established by the Central American Technical Regulation (RTCA) 11.03.56.09 (Pharmaceutical products. Natural medicinal products for human use. Quality verification), and determined if they have uniformity for different batches of this brand. To verify the quality of three batches of this product, the following assays were done: Labeling requirements, organoleptic, minimum fill, foreign organic matter, loss on drying, total ash, acid-insoluble ash, lead and arsenic limits, microbial enumerations and specific microorganisms (E. coli and Salmonella sp.) assays. As conclusion, the batches were in compliance for all the assays, except for labeling test, since information corresponding to the primary (batch number and expiration date) and secondary packaging (qualitative-quantitative composition of active ingredients interactions and adverse effects) were not presented. Furthermore, one of the batches did not have information about the employment, contraindications and warnings. Also, the manufacturing company maintained a good reproducibility between one batch and another, and the improvements that can be made are in the product labeling and better controls in its filling. Keywords: Natural product, Mentha piperita, quality control, tisane, pharmacopoeia, Central American Technical Regulation.

scholarly journals Relative abundance and activity patterns of terrestrial mammals in Pacuare Nature Reserve, Costa Rica

2017 ◽  
Vol 9 (1) ◽  
pp. 15-21
Author(s):  
Stephanny Arroyo-Arce ◽  
Ian Thomson ◽  
Carlos Fernandez ◽  
Roberto Salom-Perez
Keyword(s):  
Costa Rica ◽  
Nature Reserve ◽  
Mammalian Species ◽  
Activity Patterns ◽  
Abundant Species ◽  
Camera Trap ◽  
Central American ◽  
Leopardus Pardalis ◽  
Terrestrial Mammals ◽  
History Of

Located in Costa Rica, Pacuare Nature Reserve has a long established history of wildlife monitoring programs primarily focused on species of nesting marine turtles and the Agami herons (Agamia agami) found within the reserve. Our research represents the first as­sessment on the local terrestrial mammal populations. Data was col­lected by using seven camera trap stations distributed within the boundaries of the reserve. From April 2015 to March 2016, and after a total of 1 643 camera trap nights, we were able to identify 11 terres­trial mammalian species distributed in six orders and nine families. The most abundant species was the common opossum (Didelphis marsu­pialis), followed by the ocelot (Leopardus pardalis). A noticeably ab­sent species, otherwise common throughout the area, was the Central American agouti (Dasyprocta punctata). Our results are similar to those from other protected areas in the Northeastern Caribbean coast of Costa Rica.

Jumping a geographic barrier: diversification of the mangrove species Pelliciera rhizophorae (Tetrameristaceae) across the Central American Isthmus

2014 ◽  
Vol 11 (1) ◽  
Author(s):  
María Fernanda Castillo-Cárdenas ◽  
Fernando Díaz-Gonzales ◽  
Ivania Cerón-Souza ◽  
Oris Sanjur ◽  
Nelson Toro-Perea
Keyword(s):  
Central American ◽  
Mangrove Species ◽  
Geographic Barrier ◽  
Pelliciera Rhizophorae ◽  
Central American Isthmus
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