The shark genus Carcharhinus Blainville, 1816 (Chondrichthyes : Carcharhinidae) in Argentine waters

1998 ◽  
Vol 49 (7) ◽  
pp. 747 ◽  
Author(s):  
Gustavo E. Chiaramonte
Keyword(s):  
Continental Shelf ◽  
Buenos Aires ◽  
South Atlantic ◽  
Carcharhinus Plumbeus ◽  
Carcharhinus Leucas ◽  
First Time ◽  
New Evidence

The purpose of this contribution is to review the species of the shark genus Carcharhinus found along the coast of Argentina. New southern limits for the distribution of the genus are given for the western South Atlantic. The presence of Carcharhinus leucas (Valenciennes, 1839) is recorded for the first time on the Province of Buenos Aires coast. New evidence is given which confirms the presence of Carcharhinus brachyurus(GÜnther, 1870) in the area. Carcharhinus plumbeus (Nardo, 1827) is known from only a single Argentine record. Carcharhinus longimanus (Poey, 1861) has been recorded from oceanic waters offshore of Argentina, but has not been taken from continental shelf waters. Resumen. En éste trabajo se revisan las especies de tiburones del género Carcharhinus encontradas en la costa de la Argentina. Nuevos límites septentrionales para la distribución de las especies del género en el Atlántico Sudoccidental son presentados. Se refiere por primera vez la presencia de Carcharhinus leucas (Valenciennes, 1839) para la costa de la Provincia de Buenos Aires. Se presenta nueva evidencia que confirma la presencia de Carcharhinus brachyurus (GÜnther, 1870) en el área. Carcharhinus plumbeus (Nardo, 1827) ha sido citado una sóla vez para Argentina. Carcharhinus longimanus (Poey, 1861) ha sido registrado en aguas oceánicas frente a la plataforma de Argentina, pero no en aguas sobre la plataforma continental.

New Evidence for a South Atlantic Stock of Humpback Whales Wintering on the Northwest African Continental Shelf

2013 ◽  
Vol 48 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Koen Van Waerebeek ◽  
Abdoulaye Djiba ◽  
Jens-Otto Krakstad ◽  
Abdellahi Samba Ould Bilal ◽  
Idrissa L. Bamy ◽  
...  
Keyword(s):  
Continental Shelf ◽  
South Atlantic ◽  
Humpback Whales ◽  
New Evidence

Nikoides schmitti Manning & Chace, 1971 (Caridea: Processidae) in the South Atlantic Ocean, with an updated list and key for processid shrimps of Brazil

Zootaxa ◽  
2011 ◽  
Vol 2864 (1) ◽  
pp. 34 ◽  
Author(s):  
ALEXANDRE OLIVEIRA ALMEIDA ◽  
LUIS ERNESTO ARRUDA BEZERRA
Keyword(s):  
Atlantic Ocean ◽  
Continental Shelf ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Depth Range ◽  
The South ◽  
Soft Bottoms ◽  
First Time

The shrimp Nikoides schmitti Manning & Chace, 1971 (Decapoda: Caridea: Processidae) is reported for the first time from the South Atlantic Ocean, based on four specimens dredged on soft bottoms of the continental shelf of the Camamu Basin, Bahia, Brazil (13°28’–13°30’S; 38°47’–38°49’W), at a depth range of 38–49 m depth. The Brazilian material is illustrated and an updated list of the Brazilian processid shrimps and a key for their identification are provided.

DIFFUSE TERMITINAE NESTS SHED LIGHT ON THE AFFINITIES OF LAETOLICHNUS KWEKAI (KRAUSICHNIDAE)

Palaios ◽  
2021 ◽  
Vol 36 (3) ◽  
pp. 122-127
Author(s):  
LILIANA F. CANTIL ◽  
JORGE F. GENISE ◽  
JUAN L. FARINA ◽  
SEBASTIÁN LUPO ◽  
DARÍO PORRINI ◽  
...  
Keyword(s):  
Buenos Aires ◽  
Complex Structure ◽  
Coastal Dunes ◽  
Field Studies ◽  
Buenos Aires Province ◽  
South American ◽  
First Time ◽  
New Evidence ◽  
Semiarid Shrublands ◽  
Shed Light

ABSTRACT The insect trace fossil Laetolichnus kwekai, which is composed of a small chamber extending to slender cylinders at each end, was tentatively included in the ichnofamily Krausichnidae as termite nests. New evidence presented here provides information to validate these inferences. A more complex structure formed by interconnected Laetolichnus was recently found in the same Pliocene deposits (Laetoli, Tanzania) as the isolated specimens reported previously. Our study confirms inclusion of Laetolichnus in Krausichnidae and supports the inference that it represents a nest of a social insect. Neoichnological field studies in the coastal dunes of Buenos Aires Province, Argentina, were undertaken to refine further the nature of these affinities. Survey of the dune surface revealed abundant loose fragments of termite nests of a size and shape comparable to that of L. kwekai. The fragile nests constructed by Onkotermes brevicorniger, which are described here in detail for the first time, enable us to interpret the fossil structures. They consist of connected chambers similar to the interconnected Laetolichnus. These were frequently exposed and broken by wind action resulting in loose fragments similar to the isolated Laetolichnus. The Celliforma ichnofacies represented at Laetoli, which contains L. kwekai, indicates arid or semiarid shrublands and woodlands. The distribution of O. brevicorniger also corresponds to arid and semiarid shrublands and dry woodlands of Argentina. Although the African termite producer of L. kwekai and the South American Onkotermes would be phylogenetically unrelated, the analogous structures probably reflect convergent nesting behaviors as an adaptation to similar arid to semiarid environmental conditions.

A new species of Hippomonavella (Bryozoa: Cheilostomata) from the Holocene and Recent of Argentina and Uruguay (Southwest Atlantic)

Zootaxa ◽  
2020 ◽  
Vol 4728 (1) ◽  
pp. 143-148 ◽  
Author(s):  
J. LÓPEZ-GAPPA ◽  
M.G. LIUZZI ◽  
C. PEREYRA
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Small Proportion ◽  
Buenos Aires ◽  
Buenos Aires Province ◽  
Southwest Atlantic ◽  
The Holocene ◽  
The Third ◽  
First Time ◽  
A New Species

Hippomonavella charrua n. sp. is introduced based on material from the continental shelf off Uruguay. Bilaminar fragments of this species were also found in mid-Holocene deposits of Destacamento Río Salado Member, Canal de las Escobas Formation (Buenos Aires Province, Argentina), ca. 6,000 yr BP. Hippomonavella charrua n. sp. resembles H. brasiliensis Ramalho, Muricy & Taylor, 2008, but differs from this species in its more triangular and protruding avicularia occurring in just a small proportion of zooids. Hippomonavella charrua n. sp. is the third species of the genus with both fossil and Recent representatives. The tatiform ancestrula and the early astogeny are described for the first time in a species of Hippomonavella. 

New evidence for a South Atlantic stock of humpback whales wintering on the Northwest African continental shelf

2013 ◽  
Vol 48 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Koen Van Waerebeek ◽  
Abdoulaye Djiba ◽  
Jens-Otto Krakstad ◽  
Abdellahi Samba Ould Bilal ◽  
Idrissa L. Bamy ◽  
...  
Keyword(s):  
Continental Shelf ◽  
South Atlantic ◽  
Humpback Whales ◽  
New Evidence

Aleksey Peshkov as an editor of Samarskaya Gazeta

2020 ◽  
pp. 128-138
Author(s):  
A. S. Bik-Bulatov
Keyword(s):  
Local History ◽  
Organizational Skills ◽  
First Time ◽  
New Evidence ◽  
Insight Into ◽  
Shed Light

The article uses little known letters of M. Gorky, many of which were published for the first time in 1997, as well as findings of Samara-based experts in local history to shed light on the writer’s work as editor-in-chief of the Samarskaya Gazeta newspaper in 1895. The researcher introduces hitherto unstudied reminiscences of the journalist D. Linyov (Dalin) about this period, which reference a letter by Gorky, now lost. The paper details a newly discovered episode of Gorky’s professional biography as a journalist: it concerns his campaign against a Samara ‘she-wolf,’ the madam of a local brothel A. Neucheva. Linyov’s reminiscences turn out to be an important and interesting source, offering an insight into the daily grind of the young editor Gorky, providing new evidence of his excellent organizational skills, and describing his moral and social stance. The author presents his work in the context of a recently initiated broader discussion about the need to map out all Russian periodicals for the period until 1917, as well as all research devoted to individual publications.

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