scholarly journals Bryophytes of St. Helena, South Atlantic Ocean. 7. Cylindrocolea (Jungermanniales, Cephaloziellaceae): C. Sanctae-Helenae M. Wigginton Sp. Nov.

2013 ◽  
Vol 58 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Martin J. Wigginton
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
First Report ◽  
The Family ◽  
St Helena ◽  
A New Species

Abstract A new species of Cylindrocolea R. M. Schust. from St. Helena, C. sanctae-helenae M. Wigginton, sp. nov. is described and illustrated. This is the first report of the family Cephaloziellaceae from the island.

A new species ofTritonia(Opisthobranchia: Nudibranchia: Tritoniidae) from the tropical South Atlantic Ocean

2013 ◽  
Vol 94 (3) ◽  
pp. 579-585 ◽  
Author(s):  
Felipe de Vasconcelos Silva ◽  
Victor Manuel De Azevedo ◽  
Helena Matthews-Cascon
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Genital Opening ◽  
North East ◽  
White Band ◽  
The Family ◽  
The Right ◽  
A New Species

A new species of the family Tritoniidae is described from the tropical South Atlantic Ocean. The animal was found off north-east Brazil.Tritonia khaleesisp. nov. is up to 12 mm long, with a slender white body, of which the notum is covered with one broad white band extending from between the eyes and veil to the tail; veil with 4 velar appendages; retractable white rhinophores; rhinophoral sheath with fleshy extension; seven pairs of branchial plumes; the anus is located between the 3rd and 4th gills on the right side, and the genital opening is under the 2nd gill. Internally,T. khaleesisp. nov. is distinguished from other tritoniids by jaws with 10–14 rows of denticles on the inner lips, absence of stomach plates and the radular formula 32 × 2–5.1.1.1.2–5 teeth.Tritonia khaleesisp. nov. is the onlyTritoniathat possesses a unicuspid rachidian tooth as an adult.

A new species ofMarionia(Opisthobranchia: Nudibranchia: Tritoniidae) from the tropical South Atlantic Ocean

2013 ◽  
Vol 93 (6) ◽  
pp. 1617-1624 ◽  
Author(s):  
Felipe De Vasconcelos Silva ◽  
Carlos Augusto Oliveira de Meirelles ◽  
Helena Matthews-Cascon
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
New Genus ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Genital Opening ◽  
North East ◽  
The Family ◽  
The Right ◽  
A New Species

A new species of the family Tritoniidae is described for the tropical South Atlantic Ocean. The animal was found off north-east Brazil.Marionia limceanasp. nov. is up to 31 mm long, with a sturdy white body, of which the notum is covered with two rows of red polygons running from the rhinophores to the tail; notum with tubers; bi-lobed veil with 16 velar papillae; retractable white rhinophores; 11–14 pairs of branchial plumes; the anus is located below the 4th gill on the right side, and the genital opening is under the 3rd gill. Internally,M. limceanasp. nov. is distinguished from other tritoniids by jaws with three or four rows of denticles on the inner lips, a belt of 18 stomach plates; and the radular formula 26 × 26–32.1.1.1.26–32 teeth. The animal was found feeding on octocorals of a species of the new genusStragulum, and is the first reported nudibranch to feed on this genus.

Spongiopsyllus redactus, a new species of Entomolepididae (Copepoda, Siphonostomatoida) associated with a scleractinian coral in Brazil

Zoosymposia ◽  
2012 ◽  
Vol 8 (1) ◽  
pp. 49-55
Author(s):  
ROBERTA CANÁRIO ◽  
ELIZABETH G. NEVES ◽  
RODRIGO JOHNSSON
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Scleractinian Coral ◽  
South Atlantic Ocean ◽  
Recent Survey ◽  
Endopodal Segment ◽  
Monotypic Genus ◽  
The Family ◽  
Number Of Segments ◽  
A New Species

The family Entomolepididae is represented in the South Atlantic Ocean solely by Spongiopsyllus, a monotypic genus found previously in association with sponges. A recent survey on the Boa Viagem Reefs, located off Salvador, Bahia State, on the northeastern region of Brazil, has revealed a new species of the genus, Spongiopsyllus redactus n. sp., found associated with the endemic scleractinian coral Mussismilia hispida (Verrill). The new species is distinguished from its congener, S. adventicius Johnsson, 2000, by differences in the number of segments of the antennule, the ornamentation of the distal endopodal segment of the antenna, and the setation of the maxilliped and P1. An updated key to the species of Entomolepididae is also provided.

scholarly journals Ligophorus uruguayense sp. nov. (Monogenea, Ancyrocephalidae), a gill parasite from Mugil platanus (Mugiliformes, Mugilidae) in Uruguay

2009 ◽  
Vol 54 (2) ◽  
Author(s):  
Gabriela Siquier ◽  
Margarita Núñez
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Geographical Distribution ◽  
Host Species ◽  
Accessory Piece ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
The South ◽  
Gill Parasite ◽  
A New Species

AbstractThe present study describes a new species, Ligophorus uruguayense, parasitizing the gills of Mugil platanus Günther, 1880 from the coast of Uruguay. It differs from all other species of the genus mainly in the shape of the ventral bar, the thick process at the distal end of the inner root of ventral anchors, the J-shaped penis accessory piece and the vaginal tube showing transverse annulations at its distal end, the host species, and geographical distribution. This is the first description of a species of Ligophorus from a mullet in the South Atlantic Ocean.

scholarly journals Cyperus stroudii (CYPERACEAE), a new species from Ascension Island, South Atlantic Ocean

Phytotaxa ◽  
2017 ◽  
Vol 331 (1) ◽  
pp. 65 ◽  
Author(s):  
ALAN GRAY ◽  
GAIL STOTT
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Environmental Conditions ◽  
Morphological Characteristics ◽  
Common Garden ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Herbarium Specimens ◽  
Ascension Island ◽  
A New Species

Material from the Cyperus appendiculatus group was collected from Ascension Island and compared using a common garden study and to herbarium specimens from throughout the geographical range. Cyperus stroudii is described as a new species, known only from Ascension Island in the South Atlantic Ocean, it closest relative is C. appendiculatus also native to Ascension Island and Brazil. Cyperus stroudii differs from C. appendiculatus in its dwarf habit and other morphological characteristics, and these characteristics are retained under common environmental conditions indicative of genomic differences.

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 New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae)

ZooKeys ◽  
2019 ◽  
Vol 814 ◽  
pp. 53-69 ◽  
Author(s):  
Yoshihiro Fujiwara ◽  
Naoto Jimi ◽  
Paulo Y.G. Sumida ◽  
Masaru Kawato ◽  
Hiroshi Kitazato
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Atlantic Ocean ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Brazilian Coast ◽  
The South ◽  
Trunk Length ◽  
Molecular Phylogenetic ◽  
A New Species

A new species of bone-eating annelid, Osedaxbraziliensissp. n., found in a sunken whale carcass at a depth of 4,204 m at the base of the São Paulo Ridge in the South Atlantic Ocean off the Brazilian coast is described. The organism was retrieved using the human-occupied vehicle Shinkai 6500 during the QUELLE 2013 expedition. This is the 26th species of the genus and the first discovery from the South Atlantic Ocean, representing the deepest record of Osedax worldwide to date. This species morphologically resembles Osedaxfrankpressi but is distinguished by the presence of a yellow bump or patch behind the prostomium and its trunk length. Molecular phylogenetic analysis using three genetic markers (COI, 16S, and 18S) showed that O.braziliensissp. n. is distinct from all other Osedax worms reported and is a sister species of O.frankpressi.

scholarly journals Description of a new species of Echiodon (Teleostei: Carapidae) from the South Atlantic Ocean

Zootaxa ◽  
2005 ◽  
Vol 809 (1) ◽  
pp. 1 ◽  
Author(s):  
M. ERIC ANDERSON
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Adult Male ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Swim Bladder ◽  
Dorsal Fin ◽  
Fin Rays ◽  
A New Species ◽  
Pectoral Fin Rays

A new species of pearlfish, Echiodon atopus, is described from a single adult male, 176 mm TL, collected off Inaccessible Island, Tristan da Cunha Group, South Atlantic Ocean. It is characterized by its high, equal D 30 and A 30 counts (46 rays each), 7 anal rays anterior to the dorsal-fin origin, 38 precaudal vertebrae, 18 pectoral-fin rays and ventral swim bladder tunic ridges. It was caught in a bottom trawl over a deep lava-reef structure, but may be pelagic.

On the diversity of abyssal Dondersiidae (Mollusca: Aplacophora) with the description of a new genus, six new species, and a review of the family

Zootaxa ◽  
2021 ◽  
Vol 4933 (1) ◽  
pp. 63-97
Author(s):  
M. CARMEN COBO ◽  
KEVIN M. KOCOT
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
New Genus ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Latitudinal Gradients ◽  
Internal Anatomy ◽  
The Family

So far, of the 292 known species of solenogasters (Mollusca, Aplacophora), 62 belong to the clade Pholidoskepia Salvini-Plawen, 1978. Of these, only two have an abyssal distribution (3500–6000 m depth). Among Pholidoskepia, Dondersiidae Simroth, 1893 is the most diverse family. This study contributes to the knowledge of this family with the description of one new genus and six new species from the abyssal South Atlantic Ocean: Dondersia ? foraminosa sp. n., Nematomenia divae sp. n., Nematomenia brasiliensis sp. n., Nematomenia ? guineana sp. n., Helluoherpia vieiralaneroi sp. n. and Inopinatamenia (gen. n.) calamitosa sp. n. Specimens were collected during DIVA (Latitudinal Gradients of Deep-Sea BioDIVersity in the Atlantic Ocean) expeditions in the Guinea (DIVA 2 Me 63/2, 2005) and Brazil (DIVA 3 Me 79/1, 2008) Basins. Specimens were characterized based primarily on the sclerites and internal anatomy, which was studied using histology. The importance of the radula and mantle sclerites for taxonomy is emphasized. Amended diagnoses for the family and some genera within this family are provided. This contribution increases the described diversity of Dondersiidae to ten genera and 38 species and highlights the need for more study of solenogasters in the deep sea. 

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