scholarly journals A New Deep-Sea Enhydrosoma (Copepoda, Harpacticoida, Cletodidae) from the Northern Gulf of Mexico

Taxonomy ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 23-36
Author(s):  
Eun-Ok Park ◽  
Melissa Rohal ◽  
Wonchoel Lee
Keyword(s):  
New Species ◽  
Gulf Of Mexico ◽  
Deep Sea ◽  
Caudal Ramus ◽  
Northern Gulf Of Mexico ◽  
Mandibular Palp ◽  
Northwestern Mexico ◽  
Thoracic Legs

Enhydrosoma texana sp. nov. is described from the northern Gulf of Mexico. The new species is closely related to E. parapropinquum Gómez, 2003 from northwestern Mexico. Both species share several characters including an elongated cylindrical caudal ramus, an abexopodal seta of antennae, the structure of mouthpart appendages, seta formula of thoracic legs P1–P4, the shape of the P5 exopod in the female and the apophysis structure of P3 in males. However, the new species is distinguishable from E. parapropinquum by the shape of the rostrum, number of the antennular segments, the shape of the mandibular palp, the relative lengths of the thoracic legs, the shape of the apophysis of P3 in the male, setal number and length of the P5 exopod of the female, the length of the seta on P5 in the male and the relative lengths of the caudal ramus in both sexes. This is the deepest record of a species in the genus Enhydrosoma.

Discovery of Smacigastes Ivanenko & Defaye, 2004 (Copepoda: Harpacticoida: Tegastidae) in a deep-sea cold seep, with the description of a new species from the Gulf of Mexico

Zootaxa ◽  
2009 ◽  
Vol 2096 (1) ◽  
pp. 338-355 ◽  
Author(s):  
CHRISTOPH PLUM ◽  
PEDRO MARTINEZ ARBIZU
Keyword(s):  
New Species ◽  
Gulf Of Mexico ◽  
Deep Sea ◽  
Cold Seep ◽  
Cold Seeps ◽  
The Third ◽  
The Family ◽  
Mandibular Palp ◽  
A New Species

The new tegastid species Smacigastes methanophilus sp. nov. is described from cold-seep samples collected from the Gulf of Mexico in 2006. Besides Smacigastes micheli Ivanenko & Defaye, 2004 and Smacigastes barti Gollner, Ivanenko & Martínez Arbizu, 2008, this is the third species of the genus Smacigastes Ivanenko & Defaye, 2004. To date, this genus contains the only species within the family Tegastidae known from deep-sea habitats. Furthermore, S. methanophilus sp. nov. is the first species of Tegastidae found at cold seeps and associated with tubeworm aggregations. It has the same primitive features as S. micheli but can be distinguished from the latter by the setation of second and third segments of female antennule and second segment of male antennule, the setation of the mandibular palp, the ornamentation of P5 exopod in both sexes, setation of male P5 exopod, form of the female P5 baseoendopod, and the different shape and length of the P5 setae in female. Moreover, both sexes of Smacigastes methanophilus sp. nov. are much smaller than those of S. micheli. Compared to S. barti, S. methanophilus sp. nov. differs in the segmentation and setation of female antennule, the setation of male antennule, setation of mandibular palp, setation of the maxillule, number of endites of the maxilla, number of setae in P1, the ornamentation of female P5 and setation in male P5.

PAH and PCB body-burdens in epibenthic deep-sea invertebrates from the northern Gulf of Mexico

2020 ◽  
pp. 111825
Author(s):  
M. Chase Lawson ◽  
Joshua A. Cullen ◽  
Clifton C. Nunnally ◽  
Gilbert T. Rowe ◽  
David N. Hala
Keyword(s):  
Gulf Of Mexico ◽  
Deep Sea ◽  
Northern Gulf Of Mexico

Ameroculodes miltoni, a new species of estuarine amphipod (Crustacea: Malacostraca: Peracarida: Oedicerotidae) from the southeastern United States

Zootaxa ◽  
2002 ◽  
Vol 28 (1) ◽  
pp. 1 ◽  
Author(s):  
JOHN M. FOSTER ◽  
RICHARD W. HEARD
Keyword(s):  
United States ◽  
New Species ◽  
Gulf Of Mexico ◽  
Southeastern United States ◽  
Fine Sand ◽  
Northwest Atlantic ◽  
Northern Gulf Of Mexico ◽  
Wide Range ◽  
A New Species

The genus Ameroculodes Bousfield and Chevrier, 1966 is emended to accommodate a new species of oedicerotid amphipod, Ameroculodes miltoni, common to estuarine habitats of the southeastern United States. In this region the new species has been confused with Ameroculodes (=Monocu- lodes) edwardsi (Holmes, 1905) and Deflexilodes (= Monoculodes) intermedius (Shoemaker, 1930), both of which are distinctly larger and endemic to the cold temperate waters of the Northwest Atlantic. Ameroculodes miltoni can be distinguished from A. edwardsi by (1) having the postero-ventral margins of epimeral plates 1-3 rounded, (2) a short, blunt rostrum, (3) uropod 2 with relatively few dorsal spines on the peduncle, (4) and a subovate telson. Deflexilodes intermedius, like A. miltoni, has rounded epimeral plates, but is readily distinguished by the well-developed, elongate dactyls on its 3 rd and 4 th pereopods. Ameroculodes miltoni occurs over a wide range of salinities (<1°/ °° to 35°/ °° ) and is most common in medium to fine sand or sand-silt substrata. It appears to be an important biotic component of northern Gulf of Mexico estuaries.

Description of a new deep-water species of Alpheus Fabricius, 1798 from the Gulf of Mexico (Crustacea, Decapoda, Alpheidae)

Zootaxa ◽  
2011 ◽  
Vol 2925 (1) ◽  
pp. 49 ◽  
Author(s):  
ARTHUR ANKER ◽  
MARTHA NIZINSKI
Keyword(s):  
New Species ◽  
Gulf Of Mexico ◽  
Deep Water ◽  
Species Group ◽  
Depth Range ◽  
Lophelia Pertusa ◽  
Western Atlantic ◽  
Northern Gulf Of Mexico ◽  
Deep Water Species ◽  
Water Species

A new deep-water species of the snapping shrimp genus Alpheus Fabricius, 1798 is described from two offshore localities in the northern Gulf of Mexico, south of Louisiana. Alpheus lentiginosus n. sp. belongs to the A. macrocheles (Hailstone, 1835) species group and is most closely related to the western Atlantic A. pouang Christoffersen, 1979 and A. amblyonyx Chace 1972, the eastern Atlantic A. platydactylus Coutière, 1897 and A. macrocheles (Hailstone, 1835), and perhaps also to the eastern Pacific A. exilis Kim & Abele, 1988. The new species is associated with deep-water soft sediments adjacent to clusters of Lophelia pertusa (L.) (Scleractinia) or mud-covered rocks and cobble, at a depth range of 336–438 m, thus representing the deepest-known record of the Alpheidae in the Gulf of Mexico and the entire western Atlantic.

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