Millepora platyphylla (Cnidaria, Hydrozoa) range extended back to the Eastern Pacific, thanks to a new record from Clipperton Atoll

Zootaxa ◽  
2019 ◽  
Vol 4668 (4) ◽  
pp. 599-600 ◽  
Author(s):  
E. BOISSIN ◽  
C. POGOREUTZ ◽  
A. PEY ◽  
N. GRAVIER-BONNET ◽  
S. PLANES
Keyword(s):  
New Record ◽  
Eastern Pacific ◽  
Bleaching Event ◽  
East Pacific

The fire coral Millepora platyphylla Hemprich & Ehrenberg, 1834 (Cnidaria, Hydrozoa) has a widespread Indo-Pacific distribution observed from the surface to 40 m (Razak & Hoeksema 2003). However, its extirpation from the East Pacific (Gulf of Chiriqui, Panama) was documented after the 1982-1983 bleaching event (Glynn & Weerdt 1991). Here, we report the discovery of 5 colonies of M. platyphylla from the eastern Pacific, specifically at Clipperton Atoll, during the TARA Pacific expedition (www.taraexpeditions.org). 

New record of the deep water Epimeria morronei Winfield, Ortiz & Hendrickx (Amphipoda, Gammaridea, Epimeriidae) in the east Pacific

Crustaceana ◽  
2014 ◽  
Vol 87 (14) ◽  
pp. 1699-1703
Author(s):  
Michel E. Hendrickx ◽  
Ignacio Winfield ◽  
Manolo Ortiz
Keyword(s):  
Deep Water ◽  
Environmental Conditions ◽  
New Record ◽  
New Records ◽  
Eastern Pacific ◽  
Depth Range ◽  
East Pacific

New records for the deep-water amphipod Epimeria morronei Winfield, Ortiz & Hendrickx, 2012, are presented for the eastern Pacific. Also, new data related to its depth range and environmental conditions are given.

scholarly journals The Red-fin Goby, Evorthodus minutus Meek & Hildebrand, 1928: a new record from Santa Cruz Island, Galapagos Archipelago

Check List ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 1-5
Author(s):  
Omar Valencia-Méndez ◽  
Dave Catania ◽  
Andrés López-Pérez
Keyword(s):  
Brackish Water ◽  
New Record ◽  
Central American ◽  
Range Extension ◽  
Eastern Pacific ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Galapagos Archipelago ◽  
Brackish Water Species ◽  
Water Species

The Red-fin Goby, Evorthodus minutus Meek & Hildebrand, 1928, is a coastal brackish species which is commonly distributed from Sinaloa, Mexico to Guayaquil, Ecuador and particularly abundant in mangroves of Central American eastern Pacific. We report a new record of E. minutus collected from the Santa Cruz Island, part of the Galapagos Archipelago. This new record represents a range extension and is allows for a relevant discussion about colonization pathways in the equatorial eastern Pacific of a brackish-water species.

The first find of Eurycephalitinae (Jurassic Ammonitina) in New Zealand and its biogeographic implications

1991 ◽  
Vol 65 (4) ◽  
pp. 689-693 ◽  
Author(s):  
Gerd E. G. Westermann ◽  
Neville Hudson
Keyword(s):  
New Species ◽  
New Zealand ◽  
Papua New Guinea ◽  
Middle Jurassic ◽  
New Guinea ◽  
Time Correlation ◽  
Eastern Pacific ◽  
East Pacific ◽  
Single Fragment ◽  
Overlap Area

Uppermost temaikan strata from southwest Auckland Province, North Island, New Zealand, have recently yielded a small fauna of Middle Jurassic ammonites previously believed to be endemic to the eastern Pacific borderlands, although a single fragment of the new species described below was previously reported in a large Tethyan assemblage from Papua, New Guinea, by Westermann and Callomon (1988). The New Zealand assemblage consists of the dimorphic pair Xenocephalites (♂) and Lilloettia (♀) with close morphologic ties to species from the latest Bathonian Steinmanni Standard Zone of the Andean Province (Riccardi et al., 1989). This new find permits direct time-correlation of the uppermost part of the Temaikan Stage (Marwick, 1951, 1953) with the East-Pacific latest Bathonian Steinmanni Zone and with the East-Tethyan Late Bathonian Macrocephalites apertus Association. The upper Temaikan Stage of south Otago Province, southeastern South Island, New Zealand, has also yielded rare representatives of the Tethyan Macrocephalitinae, so that the New Zealand area in the late Middle Jurassic was in the overlap area of Tethyan and East-Pacific Subrealms.

scholarly journals Insights into Symbiont Population Structure among Three Vestimentiferan Tubeworm Host Species at Eastern Pacific Spreading Centers

2016 ◽  
Vol 82 (17) ◽  
pp. 5197-5205 ◽  
Author(s):  
Maëva Perez ◽  
S. Kim Juniper
Keyword(s):  
Population Structure ◽  
Host Species ◽  
East Pacific Rise ◽  
Nucleotide Sequences ◽  
Juan De Fuca Ridge ◽  
Eastern Pacific ◽  
Content Type ◽  
East Pacific ◽  
Genome Wide ◽  
Juan De Fuca

ABSTRACTThe symbiotic relationship between vestimentiferan tubeworms and their intracellular chemosynthetic bacteria is one of the more noteworthy examples of adaptation to deep-sea hydrothermal vent environments. The tubeworm symbionts have never been cultured in the laboratory. Nucleotide sequences from the small subunit rRNA gene suggest that the intracellular symbionts of the eastern Pacific vent tubewormsOasisia alvinae,Riftia pachyptila,Tevnia jerichonana, andRidgeia piscesaebelong to the same phylotype of gammaproteobacteria, “CandidatusEndoriftia persephone.” Comparisons of symbiont genomes between the East Pacific Rise tubewormsR. pachyptilaandT. jerichonanaconfirmed that these two hosts share the same symbionts. TwoRidgeiasymbiont genomes were assembled from trophosome metagenomes from worms collected from the Juan de Fuca Ridge (one and five individuals, respectively). We compared these assemblies to those of the sequencedRiftiaandTevniasymbionts. Pangenome composition, genome-wide comparisons of the nucleotide sequences, and pairwise comparisons of 2,313 orthologous genes indicated that “Ca. Endoriftia persephone” symbionts are structured on large geographical scales but also on smaller scales and possibly through host specificity.IMPORTANCERemarkably, the intracellular symbionts of four to six species of eastern Pacific vent tubeworms all belong to the same phylotype of gammaproteobacteria, “CandidatusEndoriftia persephone.” Understanding the structure, dynamism, and interconnectivity of “Ca. Endoriftia persephone” populations is important to advancing our knowledge of the ecology and evolution of their host worms, which are often keystone species in vent communities. In this paper, we present the first genomes for symbionts associated with the speciesR. piscesae, from the Juan de Fuca Ridge. We then combine these genomes with published symbiont genomes from the East Pacific Rise tubewormsR. pachyptilaandT. jerichonanato develop a portrait of the “Ca. Endoriftia persephone” pangenome and an initial outline of symbiont population structure in the different host species. Our study is the first to apply genome-wide comparisons of “Ca. Endoriftia persephone” assemblies in the context of population genetics and molecular evolution.

scholarly journals Aspects of a Northern Hemisphere Atmospheric Blocking Climatology

2008 ◽  
Vol 65 (5) ◽  
pp. 1638-1652 ◽  
Author(s):  
E. Tyrlis ◽  
B. J. Hoskins
Keyword(s):  
Northern Hemisphere ◽  
Storm Track ◽  
Eastern Pacific ◽  
Average Intensity ◽  
Western Atlantic ◽  
East Pacific ◽  
Eastern Atlantic Ocean ◽  
The Mean ◽  
Autumn And Winter ◽  
Relationship Of

Abstract A comprehensive climatology of Northern Hemisphere blocking is described based on a PV–θ wave-breaking index at the latitude of the climatological storm track and using the 40-yr ECMWF Re-Analysis (ERA-40) dataset. The general characterization of blocking regions is in agreement with most other studies, though more detail is provided here. In the annual average, blocking is most prevalent in the large region from the eastern Atlantic Ocean through Europe to central Asia with a secondary region in the central and eastern Pacific Ocean. Using a blocking criterion with the requirement for both longitudinal extent and temporal persistence, the peak in the frequency is in the Scandinavian region, where 24% of the days are characterized by blocking. In the east Pacific maximum, the corresponding number is 7%. However, there is considerable and very important interannual variability. The decay rate in the number of blocking events lasting at least a specified number of days is significantly less over Europe than elsewhere. However, the average intensity of blocking episodes is slightly higher in the east Pacific. The mean annual cycle of blocking is quite complex. Over most of Europe it continues through the year, with maximum intensities in the autumn and winter. To both the east and west, over the western Atlantic and Asia, there are two periods in the year of highest blocking frequency. Similar two-cycle behavior is found in the eastern Pacific region. The relationship of blocking with the storm track and the mean planetary-scale geopotential ridges is considered, and the evidence that blocking is a particular phenomenon with its own nonlinear dynamics is discussed.

Variability in the Southerly Flow into the Eastern Pacific ITCZ*

2005 ◽  
Vol 62 (12) ◽  
pp. 4400-4411 ◽  
Author(s):  
Simon P. de Szoeke ◽  
Christopher S. Bretherton
Keyword(s):  
Boundary Layer ◽  
Time Scales ◽  
Land Surface ◽  
Surface Wind ◽  
Principal Component ◽  
Low Pressure ◽  
Meridional Wind ◽  
Eastern Pacific ◽  
Boreal Summer ◽  
East Pacific

Abstract During boreal summer and fall, there is a strong southerly boundary layer flow across the equator into the east Pacific intertropical convergence zone (ITCZ). The modulation of this flow on synoptic to seasonal time scales is studied using an index of meridional pressure difference between the equator and the ITCZ along 95°W. Two complementary datasets from the East Pacific Investigation of Climate (EPIC) are used to study eastern Pacific variability. Daily measurements of sea level pressure (SLP) from Tropical Atmosphere Ocean (TOA) array buoys from May to November 2001 provide temporal coverage, and eight flights by a C-130 aircraft during September to October 2001 document the associated modulation of lower tropospheric vertical structure. The principal mode of variability of the perturbation SLP along 95°W from 1°S to 12°N, derived by principal component analysis from either the eight flights (PC1C-130) or from daily TAO buoy observations (PC1), explains 77% of the meridional pressure gradient variability. The pressure anomalies at 1.6 km are similar to those at the surface. The time series of the first mode of the TAO observations shows that most of the variance is in the 2–7-day range. Low pressure at 12°N is associated with southerly and westerly surface wind anomalies, and enhanced precipitation in the ITCZ. The depth of ITCZ convection is more strongly correlated to meridional wind above the planetary boundary layer (PBL) than to meridional wind within the PBL. There is little correlation of PBL meridional flow across the equator with ITCZ convection. Regression of PC1C-130 against the 95°W cross sections observed by dropwinsondes released during the eight C-130 flights shows correlations of westerlies to positive PC1C-130 (low pressure at 12°N). Between the equator and 4°N, statistically significant northerlies just above the PBL at 1–2-km height and southerlies at 4 km are correlated with negative PC1C-130, having high SLP at 12°N, an anomalously weak meridional SLP gradient, and suppressed convection in the ITCZ. PC1 is bandpass filtered and correlated with reanalysis fields to identify the structures that modulate meridional pressure gradients along 95°W. Most of the variability at periods less than 15 days is related to easterly waves. Seasonal trends in PC1 during May–October 2001 reflect the seasonal evolution of the sea and land surface temperatures. After the seasonal trend is removed, a geostrophic westerly jet at 12°N—probably related to the Madden–Julian oscillation—dominates PC1 variability on time scales longer than 15 days.

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