A new species of Polygordius (Polychaeta: Polygordiidae): from the inner continental shelf and in bays and harbours of the north-eastern United States

2006 ◽  
Vol 86 (5) ◽  
pp. 1025-1034 ◽  
Author(s):  
Patricia A. Ramey ◽  
Dieter Fiege ◽  
Brian S. Leander
Keyword(s):  
New Jersey ◽  
New Species ◽  
Continental Shelf ◽  
Rank Correlation ◽  
Fine Sand ◽  
Coarse Sand ◽  
Eastern United States ◽  
Sediment Grain Size ◽  
Inner Continental Shelf ◽  
A New Species

A new species of Polygordiidae, Polygordius jouinae sp. nov., along with its distribution, habitat, and reproduction is described. Polygordius jouinae sp. nov., the first North American Polygordius, is a dominant member of macrofaunal communities on the inner continental shelf, and in bays and harbours from Massachusetts to southern New Jersey. It is distinguished from most other Polygordius species by its non-inflated, heavily ciliated pygidium, absence of pygidial glands, and a conical (rather than rounded) prostomium. The 18S SSU rDNA from P. jouinae sp. nov. was sequenced and represents the first named Polygordius species with a DNA reference in GenBank. Spearman rank correlation of sediment grain size with density of P. jouinae sp. nov. at a New Jersey site showed that density was significantly (P<0.05; N=92) positively correlated with the proportion of medium to very coarse sand and negatively correlated with the fine sand fractions. Ecologically, P. jouinae sp. nov. is an important macrofaunal species given its widespread distribution and its fidelity for coarse sand habitats. Thus, its relative abundance may be useful as an indicator of changing sedimentary conditions.

A new species of Pachycheles (Crustacea: Anomura: Porcellanidae), with taxonomic remarks on two other porcelain crabs from the remote oceanic archipelago of Trindade and Martin Vaz, South Atlantic Ocean

Zootaxa ◽  
2017 ◽  
Vol 4299 (4) ◽  
pp. 546 ◽  
Author(s):  
LUCIANE AUGUSTO DE AZEVEDO FERREIRA ◽  
MARCOS TAVARES
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Continental Shelf ◽  
Abdominal Segment ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Western Atlantic ◽  
Porcelain Crabs ◽  
Inner Continental Shelf ◽  
A New Species

Three species in two genera of porcelain crabs are reported from the remote oceanic archipelago of Trindade and Martin Vaz one of which, Pachycheles meloi, new to science. The new species is morphologically similar to Pachycheles riisei (Stimpson, 1858) from the inner continental shelf between Florida (USA) and São Paulo (Brazil), of which Pachycheles meloi sp. nov. differs by a suite of carapace and appendage characters, including the presence of a pair of male gonopods on the second abdominal segment (absent in P. riisei). The new species is additionally compared to other congeners. Opportunity is taken to elaborate on the taxonomy of Petrolisthes amoenus (Guérin-Méneville, 1855) and Petrolisthes marginatus (Stimpson, 1859). The Trindade and Martin Vaz Archipelago contain a strongly depauperate porcellanid fauna of western Atlantic affinities. 

scholarly journals Occurrence of storm-generated bedforms along the inner continental shelf: Southeastern Brazil

2010 ◽  
Vol 58 (spe2) ◽  
pp. 45-56 ◽  
Author(s):  
Daphnne Moraes Costa Moscon ◽  
Alex Cardoso Bastos
Keyword(s):  
Continental Shelf ◽  
Fine Sand ◽  
Coarse Sand ◽  
Southeastern Brazil ◽  
Side Scan Sonar ◽  
Espírito Santo ◽  
Sediment Transportation ◽  
Espirito Santo ◽  
Inner Continental Shelf

Side-scan sonar surveys were carried out in two different areas on the inner continental shelf off the state of Espírito Santo (southeastern Brazil, Area 1- Guarapari Inner shelf -GUA and Area 2- Espirito Santo Bay - BES) and revealed bedforms much like those known as storm-generated bedforms. These bedforms are characterized by bands of fine sand deposited alternately over a coarse sand bottom, generating a deposit pattern of bands of fine sand intercalated with bands of coarse sand occurring between water depths of 25 to 30 m and five to eight m in GUA and ESB, respectively. In both areas, patches of coarse sand reveal the occurrence of wave-generated ripples, with crests that tend to be parallel to the coastline. The facies composition consists of very fine to fine muddy carbonate sands with siliciclastic fine gravel in GUA and coarse to medium sand with bioclastic gravel in BES. Thus, the influence of storm currents and waves in the formation and maintenance of these storm-generated bedforms is clear. However, the classification of the hydrodynamics and sediment transportation is required for estimating the formation, transportation and maintenance of these bedforms.

A new species of the genus Rapturella (Gastropoda: Acteonidae) from southeast Brazil

Zootaxa ◽  
2018 ◽  
Vol 4521 (1) ◽  
pp. 125 ◽  
Author(s):  
CARLO M. CUNHA ◽  
LUIZ RICARDO L. SIMONE
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Deep Water ◽  
Shell Morphology ◽  
Southwest Pacific ◽  
Southeast Brazil ◽  
Pacific Waters ◽  
A New Species ◽  
High Diversity

Acteonidae d'Orbigny, 1843 is the largest family within the superfamily Acteonoidea (Bouchet et al. 2017) and includes small gastropods typical of infralittoral environments. Most acteonids living on the continental shelf or in deep water have been described on the basis of shell morphology alone (Simone 2006; Valdés 2008; Cunha 2011; Salvador & Cunha 2016), because little material with soft parts has been collected and examined. Consequently, little is known about the ecology of the species.  Recently, many new species of the genus Acteon Montfort, 1810 have been described from tropical Southwest Pacific waters (Valdés 2008), suggesting that a high diversity of acteonid species may await discovery in other deep water environments, including those of Brazil. 

scholarly journals II.—On the Nomenclature of Saurocephalus lanciformis of the British Cretaceous Deposits: with Description of a New Species (S. Woodwardii)

1878 ◽  
Vol 5 (6) ◽  
pp. 254-261 ◽  
Author(s):  
William Davies
Keyword(s):  
New Jersey ◽  
New Species ◽  
The State ◽  
Microscopic Structure ◽  
Natural Size ◽  
Classical Work ◽  
A New Species ◽  
Louis Agassiz ◽  
Cretaceous Deposits

Dr. Mantell, in his classical work, the “Fossils of the South Downs,” figured two large compressed and lanciform teeth preserved in his collection and obtained from the Chalk at Lewes, as respectively the teeth, of an unknown fish and of a species of Squalus. Similar teeth, and from the same collection, were subsequently figured and described by Prof. Louis Agassiz, who, from external characters chiefly, considered them to have belonged to a Sphyrænoid fish, and he referred them to an American species founded by Dr. Harlan upon portions of jaws with teeth in situ found in a Cretaceous deposit in the State of New Jersey, but described by him as remains of a Saurian, and to which he gave the name of Saurocephalus lanciformis. At the time when Agassiz referred these teeth to Harlan's species, and determined their ichthyic character, he had not seen the American fossils; but he states that these conclusions were subsequently confirmed by Prof. Owen's description and drawings of the microscopic structure, and of teeth of the natural size of the Saurocephalus lanciformis, Harl., in his “Odontography,” p. 130, pl. 55. But Prof. Owen's researches were made upon a genuine tooth of the American fossil sent to him by Dr. Harlan, and not upon an English specimen.

Diopatra Marocensis, a New Brooding Species of Onuphidae (Annelida: Polychaeta)

1995 ◽  
Vol 75 (4) ◽  
pp. 949-955 ◽  
Author(s):  
Hannelore Paxton ◽  
Souad Fadlaoui ◽  
Jean-Paul Lechapt
Keyword(s):  
New Species ◽  
Atlantic Coast ◽  
Fine Sand ◽  
Direct Development ◽  
A New Species

A new species, Diopatra marocensis, is described from the fine sand Abra alba community, Sidi Boulbra, south Moroccan Atlantic coast. The new species is a member of the D. cuprea complex and is characterized by having crescentic nuchal grooves, short ceratophores, a short branchiate region, four pairs of modified parapodia with bidentate pseudocompound hooks, pectinate setae with 11–20 teeth, limbate setae with conspicuously serrated shelf, and subacicular hooks from setiger 13–15. Eggs of Diopatra marocensis sp. nov. are deposited in the parental tube, where they undergo direct development and remain until the young consist of 32–34 setigers.

The genus Sigmoilina Schlumberger

1974 ◽  
Vol 22 (1) ◽  
pp. 105 ◽  
Author(s):  
RW Ponder
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
A New Species

The genus Sigmoilina Schlumberger, 1887, is interpreted to include dentate porcelaneous taxa with an initial sigmoiline chamber arrangement. Spirosigmoilina Parr, 1942, and Quinqueloculina (Pseudo- schlumbergerina) Cherif, 1973, are considered synonymous with Sigmoilina. A new species, Sigmoilina townsvillensis, is described from the continental shelf of north Queensland.

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