scholarly journals Planktotrophic Brachiopod Larvae from the Pacific and Caribbean of Panama

Diversity ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 2 ◽  
Author(s):  
Rachel Collin ◽  
Dagoberto Venera-Pontón ◽  
Amy Driskell ◽  
Kenneth Macdonald ◽  
Michael Boyle
Keyword(s):  
Dna Barcoding ◽  
Life Histories ◽  
Pacific Coast ◽  
Marine Invertebrates ◽  
Sequence Data ◽  
Operational Taxonomic Unit ◽  
Bocas Del Toro ◽  
The Pacific ◽  
The Caribbean ◽  
Low Levels

Lingulids and discinids are the only brachiopods that exhibit life histories that include a feeding planktonic stage usually referred to as a “larva”. We collected planktotrophic brachiopod larvae from the Pacific and Caribbean coasts of Panama and took a DNA barcoding approach with mitochondrial cytochrome c oxidase subunit I (COI), mitochondrial ribosomal 16S, and nuclear ribosomal 18S genes to identify those larvae and to estimate their diversity in the region. We observed specimens from both coasts with distinct morphologies typical of lingulid and discinid larvae. COI and 16S were sequenced successfully for the lingulid larvae but failed consistently for all discinid larvae. 18S was sequenced successfully for larvae from both families. Sequence data from each gene revealed one lingulid operational taxonomic unit (OTU) from Bocas del Toro on the Caribbean coast, and one lingulid OTU from the Bay of Panama on the Pacific coast. These OTUs differed by >20% for COI, >10% for 16S and ~0.5% for 18S. Both OTUs clustered with GenBank sequences of Glottidia species, the only genus of lingulids in the Americas, but were distinct from G. pyramidata the only species reported for the Caribbean. Analysis of 18S sequence data for discinid larvae recovered 2 OTUs, one exclusively from the Pacific and one with a mixture of Pacific and Caribbean larvae. The 18S marker does not provide enough resolution to distinguish between species, and comparisons with GenBank sequences suggest that one OTU includes Pelagodiscus species, while the other may include Discradisca species. When compared with other marine invertebrates, our surveys of brachiopod larvae through DNA barcoding show relatively low levels of diversity for Panama.

scholarly journals Checklist of benthonic marine invertebrates from Malaga Bay (Isla Palma and Los Negritos), Colombian Pacific

Check List ◽  
2012 ◽  
Vol 8 (4) ◽  
pp. 703 ◽  
Author(s):  
Diego Lozano-Cortés ◽  
Edgardo Londoño-Cruz ◽  
Vanessa Izquierdo ◽  
Fatnori Arias ◽  
Madeleine Barona ◽  
...  
Keyword(s):  
Threatened Species ◽  
Pacific Coast ◽  
Marine Invertebrates ◽  
Ecological Assessment ◽  
Natural Park ◽  
The Pacific ◽  
Rapid Ecological Assessment ◽  
Colombian Pacific

The composition of marine macroinvertebrates in two localities (Isla Palma and Los Negritos) of Malaga Bay was studied. This bay is located in the Pacific coast of Colombia and was recently declared National Natural Park. The rapid ecological assessment revealed a total of 128 species belonging to 64 families and 11 classes (including threatened species). The most common groups were: Gastropoda (27%), Polychaeta (26%), Malacostraca (16%) and Pelecypoda (13%). Even though the two sites are relatively near, being apart only by 6 km, the composition of the respective communities was very different. They shared only 7.8% of the species found; which might have profound and interesting effects for conservation purposes.

Taxonomic remarks on the alpheid shrimp genus Triacanthoneus Anker, 2010, with description of a second eastern Pacific species (Malacostraca: Decapoda)

Zootaxa ◽  
2020 ◽  
Vol 4772 (3) ◽  
pp. 450-468 ◽  
Author(s):  
ARTHUR ANKER
Keyword(s):  
Pacific Coast ◽  
Eastern Pacific ◽  
Single Specimen ◽  
Bocas Del Toro ◽  
The Pacific ◽  
Southern Gulf Of Mexico ◽  
New Material ◽  
First Time ◽  
Pacific Species ◽  
Alpheid Shrimp

The recently described alpheid genus Triacanthoneus Anker, 2010 is reassessed based on new material from the Pacific and Caribbean coasts of Panama, and the southern Gulf of Mexico. Salmoneus armatus Anker, 2010 is tentatively transferred to Triacanthoneus and the latter genus is redefined. A new eastern Pacific species of Triacanthoneus is described based on a single specimen collected by scuba diving off Coiba Island on the Pacific coast of Panama. Triacanthoneus blanca sp. nov. is closely related to its only eastern Pacific congener, T. pacificus Anker, 2010, which is reported for the first time from the Las Perlas Islands in the Gulf of Panama. Morphological variation in T. toro Anker, 2010 is discussed on the basis of new topotypical material from Bocas del Toro, Panama, and a single specimen tentatively reported as T. cf. toro from Sisal, Mexico. An identification key to the seven currently known species of Triacanthoneus, with updated distributional and ecological information, as well as high-resolution colour photographs of four species are also provided. 

scholarly journals Diosgenin Production in North America

1991 ◽  
Vol 1 (1) ◽  
pp. 22-27 ◽  
Author(s):  
Ray F. Dawson
Keyword(s):  
Chemical Synthesis ◽  
Pacific Coast ◽  
Technology Development ◽  
Microbial Fermentation ◽  
Oil Processing ◽  
The Pacific ◽  
Soya Oil ◽  
Low Levels ◽  
Low Tension ◽  
Fermentation Technology

Diosgenin is a steroidal aglycone occurring in certain species of Dioscorea native principally to eastern Mexico. In the 1940s, diosgenin became a much-sought-after intermediate for the chemical synthesis of certain corticosteroids and structurally related fertility regulants. Various difficulties of access to native sources led to attempts at plantation production. One of these, supported by the Upjohn Company between 1962 and 1980, was located on the Pacific coast of Guatemala and is described herein from the standpoint of technology development. The Dioscorea plant produces a long, coarse vine that requires support. The deep-growing, fleshy rhizome contains the diosgenin and, at harvest, must be removed from soil depths up to 1 m. Dry rhizome yield depends on supply of readily available (low-tension) soil water. Sites located over abundant water reserves give satisfactory rhizome yields, but diosgenin concentrations fall to uneconomically low levels under such circumstances. By 1980, diosgenin had been displaced by two products of soya oil processing, stigmasterol and sitosterol, which became available as a result of advances in microbial fermentation technology. Consequently, the cultivation of Dioscorea was abandoned.

scholarly journals CRUSTACEOS DECAPODOS DEL PACIFICO COLOMBIANO: LISTA DE ESPECIES Y CONSIDERACIONES ZOOGEOGRAFICAS

2016 ◽  
Vol 21 ◽  
Author(s):  
Rafael Lemaitre ◽  
Ricardo Alvarez León
Keyword(s):  
Gulf Of California ◽  
Pacific Coast ◽  
Marine Species ◽  
Eastern Pacific ◽  
Nominal Species ◽  
Review Of The Literature ◽  
Tropical Eastern Pacific ◽  
The Pacific ◽  
History Of ◽  
The Caribbean

The Pacific coast of Colombia has been poorly explored, and its fauna is one of the least known in the tropical eastern Pacific. Although knowledge of the decapod fauna from this coast has recently increased, the information is scattered in numerous sources. A review of the literature showed that 378 decapods have been reported from this coast, including the islands of Gorgona and Malpelo. The numbers of species are distributed as follows; Dendrobranchiata, 18; Caridea,79; Thalassinidea, 13; Palinura, 6; Anomura, 61; and Brachyura, 201 .Twenty-seven species are known exclusively from the Colombian coast, three of which are endemic to the islands of Malpelo or Gorgona. A list of nominal species is presented, including information on distribution, important references, and synonyms under which the taxa have been reported for this coast. A summary of the history of explorations of the Pacific coast of Colombia as it relates to decapods, is presented. Zoogeographic affinities are briefly discussed for the marine species based on published distributions. Affinities are greatest with the Gulf of California (51.8%), followed by the Galápagos (28.6%), the Indo-Pacific (8.8%), and the Caribbean- Atlantic (7.7%).

scholarly journals First record and geographic range extension of the coccolithophore Scyphosphaera apsteinii Lohman, 1902 (Haptophyta: Pontosphaeraceae) from the Pacific coast of Mexico

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1754 ◽  
Author(s):  
Francisco O. López-Fuerte ◽  
Ismael Gárate-Lizárraga ◽  
David A. Siqueiros-Beltrones ◽  
Ricardo Yabur
Keyword(s):  
Gulf Of Mexico ◽  
Type Species ◽  
Pacific Coast ◽  
First Record ◽  
Geographic Range ◽  
Central Pacific ◽  
The West ◽  
The Pacific ◽  
The Caribbean ◽  
First Time

The coccolithophorid Scyphosphaera apsteinii is here reported for the first time from waters off the west coast of the Baja California Peninsula. Scypho­sphaera apsteinii is the type species of the genus Scyphosphaera and had hitherto been recorded only in the Atlantic and Indian Oceans, the Gulf of Mexico, the Mediterranean, and the Caribbean Seas. Specimens were found in samples collected in nets off Isla de Guadalupe in January 2013. This recording thus extends the geographical distribution of S. apsteinii from the Central Pacific (Hawaii) to the Eastern Pacific (NW Mexico).

Review of the bryozoan genus Bryopesanser Tilbrook, 2006 (Escharinidae: Cheilostomata) with the description of 11 new species

Zootaxa ◽  
2012 ◽  
Vol 3165 (1) ◽  
pp. 39 ◽  
Author(s):  
KEVIN J. TILBROOK
Keyword(s):  
New Species ◽  
Sri Lanka ◽  
West Africa ◽  
Red Sea ◽  
Pacific Coast ◽  
Caribbean Coast ◽  
The Pacific ◽  
The Caribbean

Geographically widespread material originally assigned to the Floridan species Bryopesanser pesanseris (Smitt, 1873)was thoroughly examined and found to mask a hitherto unknown diversity. Smitt’s (1873) species has previously beennoted as “well-known and widely distributed” but this is not the case. This paper reviews the species previously assignedto Bryopesanser Tilbrook, 2006 (B. pesanseris, B. capitaneus, B. grandicella, and B. latesco) and describes 11 new species(B. tonsillorum n. sp., B. gardineri n. sp., B. puncturella n. sp., B. thricyng n. sp., B. ascendosolaris n. sp., B. ecphyma-totes n. sp., B. hebelomaia n. sp., B. lobiones n. sp., B. crebricollis n. sp., B. baderae n. sp., B. tiara n. sp.). All the Bry-opesanser species are, to a greater or lesser extent, geographically limited in their distribution. However, two species aremore widespread than the rest and truly Indo-Pacific in their distribution: B. latesco is recorded from the Red Sea, acrossthe Indo-Pacific to the Caribbean coast of Panama; B. tonsillorum n.sp. is even more broadly distributed, from Sri Lanka and Indonesia to the Pacific coast of Colombia and also West Africa.

Life-history studies–a new approach to the taxonomy of ligulate species of Desmarestia (Phaeophyceae) from the Pacific coast of Canada

1986 ◽  
Vol 64 (10) ◽  
pp. 2192-2196 ◽  
Author(s):  
Akira F. Peters ◽  
Dieter G. Müller
Keyword(s):  
Life History ◽  
Sexual Dimorphism ◽  
North America ◽  
Life Histories ◽  
Pacific Coast ◽  
Culture Conditions ◽  
Growth Forms ◽  
Dioecious Species ◽  
New Approach ◽  
The Pacific

Life histories of two ligulate forms of Desmarestia with different phylloid width from one site on the Canadian Pacific coast were studied in culture. Meiospores from a form with narrow phylloids germinated into monoecious gametophytes. Meiospores from a form with broad phylloids developed into dioecious gametophytes, showing sexual dimorphism characteristic for dioecious species of Desmarestia. The two growth forms also differed in culture conditions required for gametogenesis. We conclude that at least two different species of ligulate Desmarestia occur on the Pacific coast of North America.

scholarly journals Terrestrial Isopoda (Crustacea, Oniscidea) from the coasts of Costa Rica, with descriptions of three new species

2018 ◽  
Vol 66 (1-1) ◽  
pp. 187 ◽  
Author(s):  
Stefano Taiti ◽  
Giuseppe Montesanto ◽  
José A. Vargas
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Pacific Coast ◽  
Caribbean Sea ◽  
The Pacific ◽  
The Caribbean ◽  
Morphological Differences ◽  
Three New Species ◽  
Halophilic Species ◽  
Caribbean Populations

Abstract: Seven species of terrestrial isopods are recorded from the coasts of the Pacific and Caribbean sides of Costa Rica. Three species (Buchnerillo neotropicalis, Hawaiioscia nicoyaensis and Trichorhina biocellata) are described as new and two species (Tylos niveus and Armadilloniscus cf. caraibicus) are newly recorded from the country. The poorly known species T. niveus is also illustrated. At present the total number of terrestrial isopod species recorded from Costa Rica is 30. Interestingly four typical littoral halophilic species (Ligia baudiniana, Tylos wegeneri, T. niveus and A. cf. caraibicus) are present on both the Pacific coast of Costa Rica and on the coasts of the lands encompassed by the Caribbean Sea. With the sole exception of A. cf. caraibicus, no morphological differences could be detected from the Pacific and Caribbean populations of those species. Rev. Biol. Trop. 66(Suppl. 1): S187-S210. Epub 2018 April 01. 

scholarly journals Trophic position and isotopic niche of mangrove fish assemblages at both sides of the Isthmus of Panama

2020 ◽  
Vol 96 (3) ◽  
pp. 449-468 ◽  
Author(s):  
Lara E Stuthmann ◽  
Gustavo A Castellanos-Galindo
Keyword(s):  
Food Webs ◽  
Environmental Conditions ◽  
Fish Assemblages ◽  
Trophic Position ◽  
Mangrove Ecosystem ◽  
Accurate Estimation ◽  
Isotopic Niche ◽  
Bocas Del Toro ◽  
The Pacific ◽  
The Caribbean

Fishes are important components of marine coastal ecosystems, often represented in food webs as second and third order consumers. Fish trophic positions (TP) in these food webs can vary across ontogeny and accurate estimation can provide insights into the functioning of these ecosystems. Mangrove ecosystem function can also vary depending on local and regional environmental conditions. Panamanian mangroves in the Caribbean Sea and the Pacific Ocean occur under strikingly different environmental conditions after the closure of the Panama Isthmus over 3 mya and likely function differently. Here, we use δ15N and δ13C and Bayesian models to calculate the TP and the Convex Hull Area (TA) of the most common fish species inhabiting mangroves of the Gulf of Montijo and Bocas del Toro on the Pacific and Caribbean coasts of Panama, respectively. Thirteen dominant fishes were used for the estimation of TP, eight in the Pacific and five in the Caribbean. Mean TP of the communities was similar but with significantly larger variations in the Caribbean than in the Pacific. Similarly, the TA was larger for the Caribbean fish assemblage than for the Pacific. Both results indicate that trophic modes in the Caribbean fish assemblages are more varied than in the Pacific. With some exceptions, FishBase TP estimates correlated positively with TP stable isotope estimates. Our results suggest that TP and TA are good proxies for mangrove fish communities' trophic modes and that these metrics may vary depending on mangrove environmental settings.

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