The resurrection of Charybdis (Gonioinfradens) giardi (Nobili, 1905), newly recorded from the SE Mediterranean Sea

Zootaxa ◽  
2018 ◽  
Vol 4370 (5) ◽  
pp. 580 ◽  
Author(s):  
BELLA S. GALIL ◽  
JACOB DOUEK ◽  
ROY GEVILI ◽  
MENACHEM GOREN ◽  
YANA YUDKOVSKY ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Cytochrome Oxidase ◽  
Red Sea ◽  
Arabian Gulf ◽  
Morphological Characters ◽  
Valid Species ◽  
Molecular Analyses ◽  
Adult Specimen ◽  
Gulf Of Oman ◽  
Portunid Crab

A single adult specimen of Gonioinfradens giardi, a portunid crab known from the Red Sea, Gulf of Oman and Arabian Gulf, was recently collected off the southern Israeli coast, in the southeastern Mediterranean Sea. Morphological characters, as well as molecular analyses based on the mitochondrial barcoding gene cytochrome oxidase sub unit I (COI), support its distinction from the widely distributed G. paucidentata. Therefore, G. giardi is reinstated as a valid species, and withdrawn from its synonymy with G. paucidentata. Previous Mediterranean records of the latter species are misidentifications and should be referred to G. giardi. The species is described, illustrated, and differentiated from its cogener. 

scholarly journals Shipborne measurements of ClNO<sub>2</sub> in the Mediterranean Sea and around the Arabian Peninsula during summer

2019 ◽  
Vol 19 (19) ◽  
pp. 12121-12140 ◽  
Author(s):  
Philipp G. Eger ◽  
Nils Friedrich ◽  
Jan Schuladen ◽  
Justin Shenolikar ◽  
Horst Fischer ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Red Sea ◽  
Marine Boundary Layer ◽  
Limit Of Detection ◽  
Arabian Gulf ◽  
Early Morning ◽  
Regional Variability ◽  
Gulf Of Oman ◽  
Oxidation Rates ◽  
The Mediterranean

Abstract. Shipborne measurements of nitryl chloride (ClNO2), hydrogen chloride (HCl) and sulfur dioxide (SO2) were made during the AQABA (Air Quality and climate change in the Arabian BAsin) ship campaign in summer 2017. The dataset includes measurements over the Mediterranean Sea, the Suez Canal, the Red Sea, the Gulf of Aden, the Arabian Sea, the Gulf of Oman, and the Arabian Gulf (also known as Persian Gulf) with observed ClNO2 mixing ratios ranging from the limit of detection to ≈600 pptv. We examined the regional variability in the generation of ClNO2 via the uptake of dinitrogen pentoxide (N2O5) to Cl-containing aerosol and its importance for Cl atom generation in a marine boundary layer under the (variable) influence of emissions from shipping and the oil industry. The yield of ClNO2 formation per NO3 radical generated was generally low (median of ≈1 %–5 % depending on the region), mainly as a result of gas-phase loss of NO3 dominating over heterogeneous loss of N2O5, the latter being disfavoured by the high temperatures found throughout the campaign. The contributions of ClNO2 photolysis and OH-induced HCl oxidation to Cl-radical formation were derived and their relative contributions over the diel cycle compared. The results indicate that over the northern Red Sea, the Gulf of Suez, and the Gulf of Oman the formation of Cl atoms will enhance the oxidation rates of some volatile organic compounds (VOCs), especially in the early morning.

scholarly journals Shipborne measurements of ClNO<sub>2</sub> in the Mediterranean Sea and around the Arabian Peninsula during summer

2019 ◽  
Author(s):  
Philipp G. Eger ◽  
Nils Friedrich ◽  
Jan Schuladen ◽  
Justin Shenolikar ◽  
Horst Fischer ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Red Sea ◽  
Marine Boundary Layer ◽  
Limit Of Detection ◽  
Arabian Gulf ◽  
Early Morning ◽  
Regional Variability ◽  
Gulf Of Oman ◽  
Oxidation Rates ◽  
The Mediterranean

Abstract. Shipborne measurements of nitryl chloride (ClNO2), hydrogen chloride (HCl) and sulphur dioxide (SO2) were made during the AQABA (Air Quality and climate change in the Arabian BAsin) ship campaign in summer 2017. The dataset includes measurements over the Mediterranean Sea, the Suez Canal, the Red Sea, the Gulf of Aden, the Arabian Sea, the Gulf of Oman and the Arabian Gulf (also known as Persian Gulf) with observed ClNO2 mixing ratios ranging from the limit of detection to &amp;approx; 600 pptv. We examined the regional variability in the generation of ClNO2 via the uptake of dinitrogen pentoxide (N2O5) to Cl-containing aerosol and its importance for Cl-atom generation in a marine boundary layer under the (variable) influence of emissions from shipping and oil industry. The yield of ClNO2 formation per NO3 radical generated was generally low (median of &amp;approx; 1–5 % depending on the region), mainly as a result of gas-phase loss of NO3 dominating over heterogeneous loss of N2O5, the latter being disfavoured by the high temperatures found throughout the campaign. The contributions of ClNO2 photolysis and OH-induced HCl oxidation to Cl-radical formation were derived and their relative contributions over the diel cycle compared. The results indicate that over the northern Red Sea, the Gulf of Suez and the Gulf of Oman the formation of Cl-atoms will enhance the oxidation rates of some VOCs, especially in the early morning.

Phylogenetic revision of the shrimp genera Ephyrina, Meningodora and Notostomus (Acanthephyridae: Caridea)

2020 ◽  
Author(s):  
Anastasiia A Lunina ◽  
Dmitry N Kulagin ◽  
Alexander L Vereshchaka
Keyword(s):  
Molecular Markers ◽  
Morphological Characters ◽  
Valid Species ◽  
Phylogenetic Study ◽  
Forward Motion ◽  
Molecular Analyses ◽  
Phylogenetic Revision ◽  
Molecular Trees

Abstract The shrimp genera Ephyrina, Meningodora and Notostomus have an unusual carapace strengthened with carinae and a half-serrated mandible, which may suggest a possible monophyly of this group. Here we test this hypothesis and present the first phylogenetic study of these genera based on 95 morphological characters (all valid species coded) and six molecular markers (71% of valid species sequenced). Representatives of all genera of Oplophoridae (sister to Acanthephyridae) were outgroups, 32 species belonging to all genera and potentially different clades of Acanthephyridae were ingroups. Both morphological and molecular analyses retrieve trees with similar topology. Our results reject the hypothesis of a clade formed by Ephyrina + Meningodora + Notostomus. We show that Ephyrina and Notostomus are monophyletic, both on morphological and on molecular trees, Meningodora gains support only on morphological trees. Evolutionary traits in the Ephyrina and Meningodora + Notostomus clades are different. Synapomorphies are mostly linked to adaptations to forward motion in Ephyrina (oar-like meri and ischia of pereopods, stempost-like rostrum) and to progressive strengthening of the carapace and pleon in Meningodora and Notostomus (net of sharp carinae). Unusual mandibles evolved in the clades independently and represent convergent adaptations to feeding on gelatinous organisms.

scholarly journals Non-methane hydrocarbon (C<sub>2</sub>–C<sub>8</sub>) sources and sinks around the Arabian Peninsula

2019 ◽  
Vol 19 (10) ◽  
pp. 7209-7232 ◽  
Author(s):  
Efstratios Bourtsoukidis ◽  
Lisa Ernle ◽  
John N. Crowley ◽  
Jos Lelieveld ◽  
Jean-Daniel Paris ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Red Sea ◽  
Atmospheric Chemistry ◽  
Oil And Gas ◽  
Arabian Peninsula ◽  
Arabian Gulf ◽  
Suez Canal ◽  
Associated Gas ◽  
Mixing Ratios ◽  
The Mediterranean

Abstract. Atmospheric non-methane hydrocarbons (NMHCs) have been extensively studied around the globe due to their importance to atmospheric chemistry and their utility in emission source and chemical sink identification. This study reports on shipborne NMHC measurements made around the Arabian Peninsula during the AQABA (Air Quality and climate change in the Arabian BAsin) ship campaign. The ship traversed the Mediterranean Sea, the Suez Canal, the Red Sea, the northern Indian Ocean, and the Arabian Gulf, before returning by the same route. The Middle East is one of the largest producers of oil and gas (O&amp;G), yet it is among the least studied. Atmospheric mixing ratios of C2–C8 hydrocarbons ranged from a few ppt in unpolluted regions (Arabian Sea) to several ppb over the Suez Canal and Arabian Gulf (also known as the Persian Gulf), where a maximum of 166.5 ppb of alkanes was detected. The ratio between i-pentane and n-pentane was found to be 0.93±0.03 ppb ppb−1 over the Arabian Gulf, which is indicative of widespread O&amp;G activities, while it was 1.71±0.06 ppb ppb−1 in the Suez Canal, which is a characteristic signature of ship emissions. We provide evidence that international shipping contributes to ambient C3–C8 hydrocarbon concentrations but not to ethane, which was not detected in marine traffic exhausts. NMHC relationships with propane differentiated between alkane-rich associated gas and methane-rich non-associated gas through a characteristic enrichment of ethane over propane atmospheric mixing ratios. Utilizing the variability–lifetime relationship, we show that atmospheric chemistry governs the variability of the alkanes only weakly in the source-dominated areas of the Arabian Gulf (bAG=0.16) and along the northern part of the Red Sea (bRSN=0.22), but stronger dependencies are found in unpolluted regions such as the Gulf of Aden (bGA=0.58) and the Mediterranean Sea (bMS=0.48). NMHC oxidative pair analysis indicated that OH chemistry dominates the oxidation of hydrocarbons in the region, but along the Red Sea and the Arabian Gulf the NMHC ratios occasionally provided evidence of chlorine radical chemistry. These results demonstrate the utility of NMHCs as source/sink identification tracers and provide an overview of NMHCs around the Arabian Peninsula.

scholarly journals Non Methane Hydrocarbon (C2–C8) sources and sinks around the Arabian Peninsula

2019 ◽  
Author(s):  
Efstratios Bourtsoukidis ◽  
Lisa Ernle ◽  
John N. Crowley ◽  
Jos Lelieveld ◽  
Jean-Daniel Paris ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Red Sea ◽  
Atmospheric Chemistry ◽  
Oil And Gas ◽  
Arabian Peninsula ◽  
Arabian Gulf ◽  
Suez Canal ◽  
Associated Gas ◽  
Mixing Ratios ◽  
Marine Traffic

Abstract. Atmospheric Non Methane Hydrocarbons (NMHC) have been extensively studied around the globe due to their importance to atmospheric chemistry and their utility in emission source and chemical sink identification. This study reports on shipborne NMHC measurements made around the Arabian Peninsula during the AQABA (Air Quality and climate change in the Arabian BAsin) ship campaign. The ship traversed the Mediterranean Sea, the Suez Canal, the Red Sea, the Northern Indian Ocean and the Arabian Gulf, before returning by the same route. This region is one of the largest producers of oil and gas (O&amp;G); yet it is among the least studied. Atmospheric mixing ratios of C2–C8 hydrocarbons ranged from a few ppt in unpolluted regions (Arabian Sea) to several ppb over the Suez Canal and Arabian Gulf where a maximum of 166.5 ppb of alkanes was detected. The ratio between i-pentane and n-pentane was found to be 0.93 ± 0.03 ppb ppb−1 over the Arabian Gulf which is indicative of widespread O&amp;G activities, while it was 1.71 ± 0.06 ppb ppb−1 in the Suez Canal which is a characteristic signature for ship emissions. We provide evidence that international shipping contributes to ambient C3–C8 hydrocarbon concentrations but not to ethane which was not detected in marine traffic exhausts. NMHC relationships with propane differentiated between alkane-rich associated gas and methane-rich non-associated gas through a characteristic enrichment of ethane over propane atmospheric mixing ratios. Utilizing the variability-lifetime relationship, we show that atmospheric chemistry governs the variability of the alkanes only weakly in the source dominated areas of the Arabian Gulf (bAG = 0.16) and along the northern part of Red Sea (bRSN = 0.22), but stronger dependencies are found in unpolluted regions such as the Gulf of Aden (bGA = 0.58) and Mediterranean Sea (bMS = 0.48). NMHC oxidative pair analysis indicated that OH chemistry dominates the oxidation of hydrocarbons in the region but along the Red Sea and the Arabian Gulf the NMHC ratios occasionally provided evidence for chlorine radical chemistry. These results demonstrate the utility of NMHCs as source/sink identification tracers and provide an overview of NMHCs around the Arabian Peninsula.

scholarly journals Reactive nitrogen around the Arabian Peninsula and in the Mediterranean Sea during the 2017 AQABA ship campaign

2021 ◽  
Author(s):  
Nils Friedrich ◽  
Philipp Eger ◽  
Justin Shenolikar ◽  
Nicolas Sobanski ◽  
Jan Schuladen ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Red Sea ◽  
Thermal Dissociation ◽  
Arabian Gulf ◽  
Gas Production ◽  
Ozone Production ◽  
Organic Nitrates ◽  
Oxides Of Nitrogen ◽  
Regional Variability ◽  
The Mediterranean

Abstract. We present ship-borne measurements of NOx (≡ NO + NO2) and NOy (≡ NOx + gas- and particle-phase organic and inorganic oxides of nitrogen) in summer 2017 as part of the expedition Air Quality and climate change in the Arabian Basin (AQABA). The NOx and NOz (≡ NOy–NOx) measurements, made with a thermal dissociation cavity-ringdown-spectrometer (TD-CRDS), were used to examine the chemical mechanisms involved in the processing of primary NOx emissions and their influence on the NOy budget in chemically distinct marine environments, including the Mediterranean Sea, the Red Sea, and the Arabian Gulf which were influenced to varying extents by emissions from shipping and oil and gas production. In all regions, we find that NOx is strongly connected to ship emissions, both via direct emission of NO and via the formation of HONO and its subsequent photolytic conversion to NO. Mean NO2 lifetimes were 3.9 hours in the Mediterranean Sea, 4.0 hours in the Arabian Gulf and 5.0 hours in the Red Sea area. The cumulative loss of NO2 during the night (reaction with O3) was more important than daytime losses (reaction with OH) over the Arabian Gulf (by a factor 2.8) and over the Red Sea (factor 2.9), whereas over the Mediterranean Sea, where OH levels were high, daytime losses dominated (factor 2.5). Regional ozone production efficiencies (OPE) ranged from 10.5 ± 0.9 to 19.1 ± 1.1. This metric quantifies the relative strength of photochemical O3 production from NOx, compared to the competing sequestering into NOz species. The largest values were found over the Arabian Gulf, consistent with high levels of O3 found in that region (10–90 percentiles range: 23–108 ppbv). The fractional contribution of individual NOz species to NOy exhibited a large regional variability, with HNO3 generally the dominant component (on average 33 % of NOy) with significant contributions from organic nitrates (11 %) and particulate nitrates in the PM1 size range (8 %).

A new species of Wyeomyia (Diptera: Culicidae) from Heliconia flower bracts in northern South America

Zootaxa ◽  
2021 ◽  
Vol 4999 (6) ◽  
pp. 534-552
Author(s):  
PAULINO SIQUEIRA RIBEIRO ◽  
MÁRCIO GALVÃO PAVAN ◽  
MARCOS BARBOSA DA SILVA ◽  
CLEBER GALVÃO ◽  
RICARDO LOURENÇO-DE-OLIVEIRA ◽  
...  
Keyword(s):  
New Species ◽  
Gene Sequence ◽  
Adult Life ◽  
Morphological Characters ◽  
Valid Species ◽  
Life Stages ◽  
Molecular Analyses ◽  
Northern South America ◽  
First Time ◽  
A New Species

A new species of the genus Wyeomyia, Wyeomyia (Decamyia) anthica sp. n., is described based on morphological and molecular analyses and is illustrated in larval, pupal and adult life stages. Among the four valid species of the subgenus Decamyia, the new species is closest to Wy. ulocoma (Theobald, 1903), from which it can be distinguished by morphological characters of the male genitalia, larval and pupal stages, and mitochondrial cytochrome c oxidase 1 gene sequence. Wyeomyia ulocoma is recorded from Brazil for the first time.

Redescription of the genus Koumansetta (Teleostei: Gobiidae), with description of a new species from the Red Sea

Zootaxa ◽  
2018 ◽  
Vol 4459 (3) ◽  
pp. 453 ◽  
Author(s):  
MARCELO KOVAČIĆ ◽  
SERGEY V. BOGORODSKY ◽  
AHMAD O. MAL ◽  
TILMAN J. ALPERMANN
Keyword(s):  
New Species ◽  
Red Sea ◽  
Black Spot ◽  
Western Indian Ocean ◽  
Morphological Characters ◽  
Valid Species ◽  
Widespread Species ◽  
Mitochondrial Coi ◽  
Dorsal Fin ◽  
A New Species

The gobiid genus Koumansetta Whitley, placed in synonymy by some authors with the similar genus Amblygobius Bleeker, is redescribed and its validity based on an integrated morphological and molecular assessment is confirmed. The following characters have been found that distinguish Koumansetta from any of 15 recognized valid species of Amblygobius: oculoscapular transverse rows trp and tra long, extending dorsally well above level of rows x1 and x2; snout pointed, prominent, longer than eye diameter, with gently sloping dorsal profile, overhanging mouth; mouth subterminal; the upper limb of first gill arch with 1–2 slender, weak and soft gill rakers anteriorly, followed by 1–5 short, also soft, broad structures; first two dorsal-fin spines elongate, remaining spines progressively shorter; pelvic frenum absent; body brown to brown-green in upper and lateral sides with narrow yellow or orange longitudinal stripes on body and head, black ocellated spot on the second dorsal fin, and another black spot dorsoposteriorly on caudal peduncle. The following three species are assigned to Koumansetta: K. rainfordi Whitley, the type species of the genus, known from the western Pacific Ocean; K. hectori (Smith), the most widespread species, known from islands of the western Indian Ocean to Micronesia and Fiji; and a new species, restricted to the Red Sea and the inner Gulf of Aden. Koumansetta hoesei sp. nov. has formerly been confused with similar K. hectori, but differs in various details of coloration, and in some morphological characters. Moreover, K. hoesei sp. nov. is evolutionary well divergent from K. rainfordi and K. hectori, its closest relative, as shown by phylogenetic analysis of the mitochondrial COI barcoding region. In addition to the description of the new species, brief species accounts are provided for K. hectori and K. rainfordi, and a key to the three species. 

Sign in / Sign up

Export Citation Format

Share Document