First record of Perkinsus olseni in cultured mussels (Mytilus chilensis) in the Beagle Channel, Southwestern Atlantic Ocean

The genus Thyonella currently comprises four species which occur in the Atlantic and Pacific Oceans. Thyonella mexicana is the only species known to occur in the Pacific Ocean. The main morphological characters used to distinguish Thyonella species are their dermal ossicles. Since the differences among these characters are subtle, this contribution provides a detailed description and comparison of the ossicle assemblage of the concerned taxa. In addition, description of the internal morphology of three of the concerned species is also provided. Further, this study reports on the first record of Thyonella sabanillaensis for the Southwestern Atlantic. A worldwide revision of the distributional records of Thyonella species is presented and their taxonomy is discussed, concluding that some traditional taxonomic characters should be used cautiously. A brief discussion about the importance of SEM analysis is also provided.

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First record of Stichopathes occidentalis (Gray, 1860) and range extensions of Antipathes atlantica Gray, 1857 (Cnidaria: Anthozoa: Antipatharia) in the southwestern Atlantic Ocean

Check List ◽

10.15560/8.4.826 ◽

2012 ◽

Vol 8 (4) ◽

pp. 826 ◽

Cited By ~ 2

Author(s):

Ralf Tarciso Silva Cordeiro ◽

Henrique Albuquerque Maranhão ◽

Suellen Tarcyla da Silva Lima ◽

Carlos Daniel Pérez

Keyword(s):

Atlantic Ocean ◽

First Record ◽

Exclusive Economic Zone ◽

Southwestern Atlantic ◽

Black Corals ◽

Southwestern Atlantic Ocean ◽

Economic Zone

Twenty-one species of black corals have been recorded in the Brazilian Exclusive Economic Zone (EEZ) to date, distributed mainly at depths greater than 20 m. The diversity of these environments along the northern and northeastern coasts of Brazil has been poorly investigated, in particular few information are available for the cnidarian fauna. This note represents the first record of the genus Stichopathes for the southwestern Atlantic Ocean, and also fills in the gaps in the distribution of Antipathes atlantica between the northern and southern coasts of Brazil.

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Heart urchins from the depths: Corparva lyrida gen. et sp. nov. (Palaeotropidae), and new records for the southwestern Atlantic Ocean

Revista de Biología Tropical ◽

10.15517/rbt.v69isuppl.1.46320 ◽

2021 ◽

Vol 69 (Suppl.1) ◽

pp. 14-34

Author(s):

Jonathan-N. Flores ◽

Pablo-E. Penchaszadeh ◽

Martín-I. Brogger

Keyword(s):

Atlantic Ocean ◽

New Genus ◽

New Records ◽

Sea Urchins ◽

First Record ◽

Southwestern Atlantic ◽

New Genus And Species ◽

Apical System ◽

Southwestern Atlantic Ocean ◽

Rear Part

Introduction: Sea urchins in the order Spatangoida are the most diverse group of extant echinoids. Objective: Describe a new genus and species of Spatangoida from abyssal depths, and add new records for known species. Methods: Specimens were collected during several cruises at different areas of the southwestern Atlantic Ocean (SWAO), among 37-55° S latitude at depths ranging from 55 to 3 000 m. We present morphological and ultrastructure analyses. Results: Corparva lyrida gen. et sp. nov. (Palaeotropidae) is described from the Mar del Plata Canyon on the Argentine continental slope (2 950 m depth), the first record of this family from Argentina. Corparva gen. nov. differs in having an apical system semi-ethmolytic, and labrum reaching to rear part of second adjacent ambulacral plate. We also report the northernmost distribution and deepest record for Brisaster moseleyi (38° S latitude, 2 212 m depth), the northward extension of the distribution range of Tripylus excavatus (39° S latitude, 74 m depth), and the first record of Abatus philippii and Abatus agassizii at the Burdwood Bank/MPA Namuncurá. Conclusions: The present work brings novel and updated data about the diversity and distribution of spatangoids from the SWAO, including the description of C. lyrida gen. et sp. nov., and new records of species. This shows how much remains to be known about the diversity and distribution of heart urchins in the SWAO, especially from the deep-sea.

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Two Armored Dinoflagellates from the Southwestern Atlantic Ocean: A New Species ofProtoperidiniumand a First Record and Redescription forGonyaulax alaskensisKofoid1

The Journal of Protozoology ◽

10.1111/j.1550-7408.1987.tb03185.x ◽

1987 ◽

Vol 34 (3) ◽

pp. 332-337 ◽

Cited By ~ 3

Author(s):

M. BEATRIZ BORGESE

Keyword(s):

New Species ◽

Atlantic Ocean ◽

First Record ◽

Southwestern Atlantic ◽

Southwestern Atlantic Ocean ◽

A New Species

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New species of the genera Havelockia and Thyone (Echinodermata: Holothuroidea) and first record of T. crassidisca from the southwestern Atlantic Ocean

Zootaxa ◽

10.11646/zootaxa.4407.4.5 ◽

2018 ◽

Vol 4407 (4) ◽

pp. 553 ◽

Cited By ~ 2

Author(s):

LUCIANA MARTINS ◽

MARCOS TAVARES

Keyword(s):

New Species ◽

Atlantic Ocean ◽

Body Wall ◽

First Record ◽

South Atlantic Ocean ◽

Brazilian Coast ◽

Southwestern Atlantic ◽

Southwestern Atlantic Ocean ◽

Two New Species ◽

First Time

Two new species in the genera Thyone and Havelockia are described and illustrated based upon specimens collected from off the southeastern Brazilian coast. Thyone florianoi sp. nov. is characterized by having two pillared body wall tables with four-holed discs and introvert with multilocular tables. Thyone crassidisca is recorded herein for the first time from the South Atlantic Ocean (Brazil). Havelockia mansoae sp. nov. is distinctive in having two pillared body wall tables with four-holed discs and introvert with plates. This is the first record of the genus Havelockia from Brazilian waters.

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