First record of colour abnormalities in the bocon toadfish Amphichthys cryptocentrus (Valenciennes 1837) (Teleostei: Batrachoididae)

2015 ◽  
Vol 8 ◽  
Author(s):  
Cláudio L.S. Sampaio ◽  
José De Anchieta C.C. Nunes ◽  
Raphael M. Macieira ◽  
José Amorim Reis-Filho
Keyword(s):  
Feeding Habits ◽  
First Record ◽  
The Body ◽  
Morphometric Data ◽  
The South ◽  
Western Atlantic ◽  
Dark Background ◽  
Body Pigmentation ◽  
Associated Species

The batrachoididAmphichthys cryptocentrusis an estuarine reef-associated species, characterized by a body of a uniformly dark background colour and head greatly depressed. We report colour abnormalities for this species, based on two specimens collected in the south-western Atlantic. Additionally, morphometric data and information about the species’ feeding habits and reproduction are provided. One specimen (most of the body was non-pigmented) exhibited small dark spots over a uniformly white body, but eyes were normally pigmented. Another specimen (totally non-pigmented) was oculocutaneous albino, lacked body pigmentation and eyes were pink-reddish translucent. Potential effects of these colour abnormalities on their ecology and behaviours are discussed.

Feeding habits and prey selection by the skate Dipturus chilensis (Elasmobranchii: Rajidae) from the south-western Atlantic

2000 ◽  
Vol 80 (5) ◽  
pp. 953-954 ◽  
Author(s):  
Luis O. Lucifora ◽  
Juan L. Valero ◽  
Claudia S. Bremec ◽  
Mario L. Lasta
Keyword(s):  
Prey Selection ◽  
Feeding Habits ◽  
The South ◽  
Western Atlantic ◽  
Total Length ◽  
Mouth Width ◽  
Merluccius Hubbsi ◽  
Illex Argentinus ◽  
Nototheniid Fish

The diet of Dipturus chilensis was composed mainly of the nototheniid fish Patagonotothen ramsayi, squid Illex argentinus, hake Merluccius hubbsi, serolid isopods, and crustaceans. Our results suggest that D. chilensis feeds selectively on some teleosts and rejects eel-like fishes. Total length of consumed P. ramsayi was significantly correlated with the skate's mouth width.

scholarly journals Comparison of body size, relative growth and size at onset sexual maturity of Uca uruguayensis (Crustacea: Decapoda: Ocypodidae) from different latitudes in the south-western Atlantic

2012 ◽  
Vol 93 (3) ◽  
pp. 781-788 ◽  
Author(s):  
Gustavo Luis Hirose ◽  
Vivian Fransozo ◽  
Carolina Tropea ◽  
Laura S. López-Greco ◽  
Maria Lucia Negreiros-Fransozo
Keyword(s):  
Body Size ◽  
Sexual Maturity ◽  
Fiddler Crab ◽  
Carapace Width ◽  
The Body ◽  
Brazilian Population ◽  
The South ◽  
Western Atlantic ◽  
Males And Females ◽  
Uca Uruguayensis

Some crustaceans show variations of their reproductive biology within their geographical distribution, and knowledge about such variations is important for the comprehension of their reproductive adaptations. This study compared two populations of the fiddler crab Uca uruguayensis from two locations on the south-western Atlantic coast: Ubatuba Bay, São Paulo, Brazil and Samborombón Bay, Buenos Aires, Argentina. The population features analysed were the body size variation (carapace width = CW) and the size at the onset of sexual maturity (SOM) in order to test the hypothesis that the size at SOM, should be the same in relative terms (RSOM), independently of the latitudinal position. In the Brazilian population the CW ranged from 4.18 to 11.60 mm for males and 3.90 to 9.80 mm for females, and in the Argentinean population from 3.60 to 14.10 mm for males and 2.85 to 12.00 mm for females. In the Brazilian population the SOM was 7.1 (RSOM = 0.58) and 5.9 mm CW (RSOM = 0.57) for males and females, respectively, and in the Argentinean population it was 7.0 (RSOM = 0.42) and 6.75 mm CW (RSOM = 0.53) for males and females, respectively. This fact is probably related to a great plasticity in the life history features of Uca uruguayensis under different environmental conditions.

First record of the genusOnchidoris(Gastropoda: Nudibranchia: Onchidorididae) from the South Atlantic Ocean, with the description of a new species from Brazil

2011 ◽  
Vol 91 (2) ◽  
pp. 505-511 ◽  
Author(s):  
Juliana Alvim ◽  
Vinicius Padula ◽  
Alexandre Dias Pimenta
Keyword(s):  
New Species ◽  
Atlantic Coast ◽  
First Record ◽  
Egg Mass ◽  
Northern Coast ◽  
The South ◽  
Western Atlantic ◽  
The Family ◽  
Lecithotrophic Development ◽  
A New Species

A new species of the genusOnchidorisis described from the south-western Atlantic, on the coast of Brazil, in the States of Rio de Janeiro and São Paulo. To date, the genusOnchidorisis known almost exclusively from the northern hemisphere, especially the Atlantic coast of Europe and the Mediterranean Sea. The single previous record from the southern hemisphere isOnchidoris maugeansis, described from Australia. This is the first record of the family Onchidorididae from the coast of Brazil.Onchidoris brasiliensissp. nov. is very similar toOnchidoris depressa, from England and the northern coast of Spain, but is distinguished by the presence of a triangular protuberance on the edge of the inner lateral radular tooth and a wide closed branchial circle with tubercles inside. Furthermore, the egg mass of O.brasiliensissp. nov. contains a single row of eggs, whereas that ofO. depressahas multiple rows.Onchidoris brasiliensissp. nov. has lecithotrophic development, the first record of this type of development in the genus. There is a relationship betweenO. brasiliensissp. nov. and the bryozoanParasmittina protecta.

New species of Microscleroderma and Amphibleptula (Demospongiae, Tetractinellida, Scleritodermidae) from two contrasting marine environments

2021 ◽  
pp. 1-11
Author(s):  
Patricia Gómez ◽  
Fernando Calderón-Gutiérrez ◽  
Carlos González-Gándara ◽  
María De Los Angeles Rojas-Terán
Keyword(s):  
New Species ◽  
First Record ◽  
The Body ◽  
Nominal Species ◽  
Marine Environments ◽  
Western Atlantic ◽  
Cozumel Island ◽  
Two New Species ◽  
First Time

Abstract We record for the first time a nominal species of the genus Microscleroderma in the Western Atlantic, and the first record of the genus Amphibleptula in Mexico. Two new species of ‘lithistid’ Tetractinellida are described: Microscleroderma mexica sp. nov. from crevices of two reefs in Veracruz, Mexico, and Amphibleptula aaktun sp. nov. from the anchialine cave El Aerolito, Cozumel Island, Mexico. Microscleroderma mexica sp. nov. is characterized by its tubular and cup-shaped to wavy laminar habitus, hirsute surface and two size categories of oxea diactines. Amphibleptula aaktun sp. nov. is characterized by its ficiform or lobular habitus with an exhalant area at the flat top of the body, divided into numerous vertical septa-like structures; its desmas have thinner epirhabds, and thinner oxea than those of Amphibleptula madrepora. This is the second species of Amphibleptula that has been described; hence, we propose the redefinition of the genus. Both species described have a shallow distribution (≤21 m depth); they are differentiated from each other by the disjunction between their habitats as well as by their morphology.

First record of Pomacanthus maculosus (Perciformes, Pomacanthidae) in the south‐western Atlantic Ocean

2018 ◽  
Vol 93 (5) ◽  
pp. 988-991 ◽  
Author(s):  
Marcelo Soeth ◽  
Johnatas Adelir‐Alves ◽  
Robin Loose ◽  
Felippe A. Daros ◽  
Henry L. Spach
Keyword(s):  
Atlantic Ocean ◽  
First Record ◽  
The South ◽  
Western Atlantic ◽  
Western Atlantic Ocean

scholarly journals First record of the Northern brown shrimp, Farfantepenaeus aztecus (Ives, 1891) (Crustacea: Decapoda: Penaeidae) in the South Adriatic Sea, Montenegro

2013 ◽  
Vol 15 (1) ◽  
pp. 165 ◽  
Author(s):  
O. MARKOVIĆ ◽  
M. GÖKOĞLU ◽  
S. PETOVIĆ ◽  
M. MANDIĆ
Keyword(s):  
Alien Species ◽  
Adult Female ◽  
Adriatic Sea ◽  
First Record ◽  
Brown Shrimp ◽  
Female Specimen ◽  
The South ◽  
Western Atlantic ◽  
Farfantepenaeus Aztecus

A single adult female specimen of the Northern brown shrimp, Farfantepenaeus aztecus, a species native to the western Atlantic coasts, was caught in Boka kotorska bay (southern Adriatic Sea) on 19 September 2013. This is the first record of this alien species in the Adriatic Sea.

New records of the genus Callogorgia (Anthozoa: Octocorallia) in the western Atlantic, including the description of a new species

2014 ◽  
Vol 95 (5) ◽  
pp. 905-911 ◽  
Author(s):  
Frederick M. Bayer ◽  
Stephen D. Cairns ◽  
Ralf T.S. Cordeiro ◽  
Carlos D. Pérez
Keyword(s):  
New Species ◽  
New Records ◽  
First Record ◽  
Species Level ◽  
The South ◽  
Separate Species ◽  
Western Atlantic ◽  
A New Species

Based on material collected during oceanographic campaigns in the western Atlantic from 1958 to 2011, two species of primnoid octocorals belonging to the genus Callogorgia were identified: Callogorgia americana and Callogorgia arawak sp. nov. These species are described and illustrated herein and their geographic and bathymetric are given. This is the first record of the genus in the south-western Atlantic. Additionally, the elevation of C. americana americana and C. a. delta to species level is proposed, keeping Callogorgia gilberti, C. delta and C. americana as separate species.

Pione angelae sp. nov. (Porifera: Hadromerida: Clionaidae) a new species of boring sponge inhabiting pagurized shells from the south-western Atlantic

2007 ◽  
Vol 87 (6) ◽  
pp. 1431-1439 ◽  
Author(s):  
Diego Urteaga ◽  
Guido Pastorino
Keyword(s):  
New Species ◽  
Buenos Aires ◽  
First Record ◽  
Valid Species ◽  
Width Ratio ◽  
The South ◽  
Western Atlantic ◽  
Boring Sponge ◽  
Length Width ◽  
A New Species

A new species of the clionaid genus Pione is described from the south-western Atlantic in Argentine waters. Pione angelae sp. nov. is the first record of the genus from southern South America. It occurs on shells of Olivancillaria urceus and Buccinanops monilifer, two common gastropods living off Mar del Plata, Buenos Aires, Argentina (38°01′41″S 57°31′07″W) that are inhabited by the hermit crab Loxopagurus loxochelis. Pione angelae sp. nov. is visible on the shell surfaces as circular papillar perforations of 312 μm on average with regular diameters. They lead directly into interconnected chambers from both sides of the shell. The chambers form well-defined galleries in dense substratum. Straight tylostyles in two size-classes (defined by their length: width ratio) occur: 158.6 μm length×2.1 μm width and 185.0×4.5 μm, with spherical heads. Microscleres are more common than tylostyles, with microspined acanthoxeas of 91 μm length, slightly bent in the centre, as well as spirasters of 12 μm length with spines more concentrated on the crests of the spirals; rarely they are straight (microrhabd like). The present samples are compared to similar valid species of the same genus and it is concluded that they represent a new species.

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