Two new species (Amphipoda, Senticaudata, Corophiida) from the continental slope and abyssal plain of the Gulf of Mexico

2016 ◽  
Vol 92 (2) ◽  
pp. 243-255
Author(s):  
Ignacio Winfield ◽  
Manuel Ortiz ◽  
Pedro-Luis Ardisson
Keyword(s):  
New Species ◽  
Gulf Of Mexico ◽  
Continental Slope ◽  
Abyssal Plain ◽  
Two New Species

Two new species of flatworms (Platyhelminthes: Polycladida) from the continental slope of the Gulf of Mexico

2008 ◽  
Vol 88 (7) ◽  
pp. 1363-1370 ◽  
Author(s):  
Sigmer Y. Quiroga ◽  
D. Marcela Bolaños ◽  
Marian K. Litvaitis
Keyword(s):  
New Species ◽  
Natural History ◽  
Gulf Of Mexico ◽  
Continental Slope ◽  
Cold Seep ◽  
Field Museum ◽  
Two New Species ◽  
Glandular Cells ◽  
Natural Wood ◽  
The Brain

Two new species of polyclads are described from the continental slope of the Gulf of Mexico. Specimens ofDidangia carneyisp. nov. andOligocladus bathymodiensissp. nov. were collected from the Louisiana slope at 610 m and 650 m, respectively.Didangia carneyisp. nov. was collected from a natural wood fall, and is characterized by the presence of tentacular and cerebral eyes, an interpolated prostatic vesicle provided with two muscular accessory prostatic vesicles, and large glandular cells that surround the male atrium.Oligocladus bathymodiensissp. nov. has a mouth anterior to the brain, a few cerebral and pseudotentacular eyes, four pairs of intestinal branches, and a ventral anal pore. Specimens of this species were collected on the margin of a hypersaline cold seep in association with mussels ofBathymodiolus childressi. All type material is deposited at the Field Museum of Natural History, Chicago, Illinois, USA.

Polyclinidae (Ascidiacea: Aplousobranchia) from the Gulf of Mexico, collected during the “Hourglass” cruises (1965–1967)

Zootaxa ◽  
2018 ◽  
Vol 4422 (4) ◽  
pp. 519 ◽  
Author(s):  
MARIA TARCIANA VIEIRA FORTALEZA ◽  
TITO MONTEIRO DA CRUZ LOTUFO
Keyword(s):  
New Species ◽  
Gulf Of Mexico ◽  
New Records ◽  
The Family ◽  
Two New Species

This paper presents the ascidians from the Family Polyclinidae collected in the Gulf of Mexico during the Hourglass Cruises between August 1965 and November 1967. The analysis of the collected material revealed the presence of eight polyclinid ascidians from three different genera, with two new species and two new records for the Gulf of Mexico. 

Two new species of the Phimochirus holthuisi complex from the Gulf of Mexico, supported by morphology, color, and genetics (Crustacea: Anomura: Paguridae)

Zootaxa ◽  
2019 ◽  
Vol 4683 (4) ◽  
pp. 531-551
Author(s):  
DARRYL L. FELDER ◽  
RAFAEL LEMAITRE ◽  
CATHERINE CRAIG
Keyword(s):  
New Species ◽  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Gene Sequence ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
The Other ◽  
Two New Species ◽  
Molecular Phylogenetic ◽  
Gene Sequence Data

Coloration, gene-sequence data (H3, 12s, 16s), and subtle features in morphology support the description of two new species, both formerly regarded to represent accepted variants of Phimochirus holthuisi s.l. While color in life consistently separates these species from P. holthuisi s.s. and from each other, morphological distinctions are subtle and less than absolute in small specimens, being based on ventral spine counts of walking leg dactyls and relative development of the superior crest on the major chela. Molecular phylogenetic analyses clearly support the separation of sister clades, representing two new species, from P. holthuisi s.s. as well as other congeners available for analysis. Both of the new species are presently known to occur widely throughout the northern Gulf of Mexico, though one occurs more commonly in the northeastern and southeastern Gulf, and may range as far south as Suriname. The other has been taken primarily in the northwestern Gulf, and is not known from outside Gulf waters. While both of the new species appear restricted to relatively deep subtidal waters of the continental shelf, Phimochirus holthuisi s.s. is instead more commonly found in shallow nearshore tropical waters on or near coral reefs. Previous literature reports of P. holthuisi usually represent, at least in part, one or both of these two new species. 

New species of the gutless marine genus Inanidrilus (Oligochaeta, Tubificidae) from the Gulf of Mexico and Barbados

1982 ◽  
Vol 60 (12) ◽  
pp. 3063-3067 ◽  
Author(s):  
Christer Erséus ◽  
H. R. Baker
Keyword(s):  
New Species ◽  
Coral Reefs ◽  
Gulf Of Mexico ◽  
West Indies ◽  
Two New Species ◽  
Definition Of

The definition of Inanidrilus Erséus, 1979 (subfamily Phallodrilinae) is emended to include Inanidrilus mexicanus sp. nov. from the eastern part of the Gulf of Mexico, and Inanidrilus falcifer sp. nov. from coral reefs at Barbados, West Indies. The two new species differ from I. bulbosus Érséus, 1979 by their possession of paired spermathecae and from each other in the morphology of their spermathecae, atria, and penial setae.

Two new species of Cerapus (Crustacea: Amphipoda: Ischyroceridae) from the Northwest Atlantic and Gulf of Mexico

Zootaxa ◽  
2018 ◽  
Vol 4441 (3) ◽  
pp. 495
Author(s):  
DAVID T. DRUMM
Keyword(s):  
New York ◽  
New Species ◽  
Body Size ◽  
Gulf Of Mexico ◽  
Delaware Bay ◽  
The Other ◽  
Northwest Atlantic ◽  
Great South Bay ◽  
Two New Species

Examination of material from the Northwest Atlantic and Gulf of Mexico revealed the presence of two new species of the amphipod genus Cerapus. One of the species occurs in the NW Atlantic (Delaware Bay and Great South Bay, New York) and the other species occurs in the Gulf of Mexico (Manatee River, Florida and Corpus Christie Bay, Texas). They can be distinguished from congeners by a combination of characters: number of antennular flagella articles, position of the male gnathopod 2 carpal process, shape of the inner ramus of pleopod 2, presence of a distoventral hook on the uropod 1 peduncle of the male, and the nature of the pereopod 7 spination/setation. They can be distinguished from each other by the number of antennular flagella articles in the female and in overall body size. 

scholarly journals The metabolic core of the prokaryotic community from deep-sea sediments of the southern Gulf of Mexico shows different functional signatures between the continental slope and abyssal plain

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12474
Author(s):  
Mónica Torres-Beltrán ◽  
Lluvia Vargas-Gastélum ◽  
Dante Magdaleno-Moncayo ◽  
Meritxell Riquelme ◽  
Juan Carlos Herguera-García ◽  
...  
Keyword(s):  
Microbial Community ◽  
Gulf Of Mexico ◽  
Continental Slope ◽  
Oil Pollution ◽  
Tricarboxylic Acid Cycle ◽  
Sulfur Metabolism ◽  
Growth Conditions ◽  
Environmental Stressors ◽  
Abyssal Plain ◽  
Conservation Strategies

Marine sediments harbor an outstanding level of microbial diversity supporting diverse metabolic activities. Sediments in the Gulf of Mexico (GoM) are subjected to anthropic stressors including oil pollution with potential effects on microbial community structure and function that impact biogeochemical cycling. We used metagenomic analyses to provide significant insight into the potential metabolic capacity of the microbial community in Southern GoM deep sediments. We identified genes for hydrocarbon, nitrogen and sulfur metabolism mostly affiliated with Alpha and Betaproteobacteria, Acidobacteria, Chloroflexi and Firmicutes, in relation to the use of alternative carbon and energy sources to thrive under limiting growth conditions, and metabolic strategies to cope with environmental stressors. In addition, results show amino acids metabolism could be associated with sulfur metabolism carried out by Acidobacteria, Chloroflexi and Firmicutes, and may play a crucial role as a central carbon source to favor bacterial growth. We identified the tricarboxylic acid cycle (TCA) and aspartate, glutamate, glyoxylate and leucine degradation pathways, as part of the core carbon metabolism across samples. Further, microbial communities from the continental slope and abyssal plain show differential metabolic capacities to cope with environmental stressors such as oxidative stress and carbon limiting growth conditions, respectively. This research combined taxonomic and functional information of the microbial community from Southern GoM sediments to provide fundamental knowledge that links the prokaryotic structure to its potential function and which can be used as a baseline for future studies to model microbial community responses to environmental perturbations, as well as to develop more accurate mitigation and conservation strategies.

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