scholarly journals First records of marine tardigrades of the genus Coronarctus (Tardigrada, Heterotardigrada, Arthrotardigrada) from Mexico

Check List ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 1-7
Author(s):  
Wilbert Andrés Pérez-Pech ◽  
Jesper Guldberg Hansen ◽  
Erica DeMilio ◽  
Alberto de Jesús-Navarrete ◽  
Ivonne Martínez Mendoza ◽  
...  

Deep-water sampling in the Perdido Fold Belt, Gulf of Mexico, Mexican Economic Exclusive Zone yielded five specimens of tardigrades belonging to the genus Coronarctus Renaud-Mornant, 1974. The specimens represent the first records of the genus for Mexico. Two two-clawed larvae and two four-clawed larvae of Coronarctus mexicus Romano, Gallo, D’Addabbo, Accogli, Baguley & Montagna, 2011 and a single four-clawed larval specimen of an undescribed Coronarctus species were identified. Taxonomic analysis of the specimens contributed to the knowledge of deep-sea and Mexican marine tardigrades, two data-poor areas of study.

AAPG Bulletin ◽  
2006 ◽  
Vol 90 (3) ◽  
pp. 363-386 ◽  
Author(s):  
Rion H. Camerlo ◽  
Edward F. Benson

1999 ◽  
Author(s):  
Stephen H. Hall ◽  
Stephen J. Matthews ◽  
Timothy G. Bevan ◽  
Mario Valderrama

2020 ◽  
Vol 77 (5) ◽  
pp. 1617-1628
Author(s):  
John R Dolan

Abstract William Beebe (1877–1962) was a very popular 20th century naturalist and an early proponent of studying all organisms in a habitat. Beebe’s deep-sea work began with his Arcturus Oceanographic Expedition in 1925 with sampling closely modelled on the Michael Sars deep-sea expedition. Dissatisfied with ship-based sampling of stations for a few days at best, he established a field laboratory in Bermuda to do intensive deep-water sampling. From 1929 to 1934, plankton net tows were carried out at the same site, over several months each year, totalling over 1500 net tows in deep waters. Here, the sampling efforts and results are reviewed from both the Arcturus Expedition and the Bermuda station. Study of the deep-sea samples yielded 43 scientific articles, published from 1926 to 1952, on a large variety of taxa. Beebe is still a popular figure connected in the public view with deep-sea exploration from his famous Bathysphere dives at the Bermuda site. However, his name rarely, if ever, appears in academic reviews of deep-sea biology or deep-sea expeditions. This study is an attempt to draw attention to Beebe’s considerable scientific deep-sea work and provide some speculation as to why his contributions might be neglected.


Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 166
Author(s):  
Nancy Yolimar Suárez-Mozo ◽  
Victor Manuel Vidal-Martínez ◽  
M. Leopoldina Aguirre-Macedo ◽  
Daniel Pech ◽  
Edlin Guerra-Castro ◽  
...  

Mollusk diversity in coastal areas of the Gulf of Mexico (GOM) has been studied extensively, but this is not the case for deep-water habitats. We present the first quantitative characterization of mollusks in shallow and deep waters of the Perdido Fold Belt. The data came from two research cruises completed in 2017. Sediment samples were collected from 56 sites using a 0.25-m2 box corer. We tested hypotheses about spatial patterns of α, β, and γ-diversity of bivalves in two water-depth zones, the continental shelf (43–200 m) and bathyal zone (375–3563 m). A total of 301 bivalves belonging to 39 species were identified. The two zones display similar levels of γ-diversity, but host different bivalve assemblages. In general, α-diversity was higher on the continental shelf, whereas β-diversity was higher in the bathyal zone. These patterns can be explained by the higher input of carbon (energy) to the near-coast shelf zone, as well as by the greater topographic complexity of habitats in the bathyal zone. These results enabled us to propose redirection of sampling efforts for environmental characterization from continental zones to the deep-water zone, especially in the context of environmental assessments during oil and gas exploration and production.


2021 ◽  
pp. 18-27
Author(s):  
Carlos Varela ◽  
Heather D. Bracken-Grissom

The genus Oediceroides Stebbing, 1888 represents a group of 23 species of amphipods that live from shallow coastal areas to abyssal plains. Most of these species have been collected in deep waters from localities in the South Atlantic and Pacific Oceans, and only one species has been found in the Mediterranean Sea. Many oediceroids inhabit waters more than 200 meters deep with only four species confined to shallow waters. This is the first occasion in which a species belonging to the genus Oediceroides is recorded for the Gulf of Mexico. Here, we describe O. improvisus sp. nov., a species of marine deep-water amphipod collected in 925 meters of water. This species has carapace, mouthpart and pereopodal characters that unite it with other members of the genus. It differs from all other species due to unique rostral and pereopod seven characters, all discussed in detail further in this description. To date, only 20 deep-sea (>200 meters) benthic amphipods have been recorded in the Gulf of Mexico, in comparison with more than 200 species of shallow water representatives from the same region. Our study provides evidence that the deep waters of the Gulf of Mexico still hold undescribed biodiversity.


2019 ◽  
Author(s):  
Alexander N. Zimmerman ◽  
◽  
Claudia C. Johnson ◽  
Nicholas W. Bussberg ◽  
Mehmet M. Dalkilic

Geology ◽  
1983 ◽  
Vol 11 (4) ◽  
pp. 215 ◽  
Author(s):  
D. M. Angstadt ◽  
J. A. Austin ◽  
R. T. Buffler
Keyword(s):  

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