scholarly journals The marine epilithic diatom Melosira brandinii sp. nov. (Bacillariophyta) from Elephant Island, Antarctic Peninsula, with comments on some related species

2001 ◽  
Vol 49 (1-2) ◽  
pp. 01-12
Author(s):  
Luciano F. Fernandes ◽  
Roseli M. de Souza-Mosimann
Keyword(s):  
New Species ◽  
Antarctic Peninsula ◽  
Related Species ◽  
Barents Sea ◽  
External Surface ◽  
Southern Brazil ◽  
Mantle Edge ◽  
Epilithic Diatom ◽  
A New Species ◽  
Elephant Island

A new species of epilithic diatom is described from samples collected near Elephant Island, Antarctic Peninsula. The cells of Melosira brandinii sp. nov. are joined in filamentous chains and attached by means of long mucilaginous stalks. The valves are circular with the valvar surface composed of irregularly arranged pentagonal Ioculi. Each loculus bears 6-12 pores on the external surface, opening to the innerside through rotae. The corona is only composed of coarse granules. A mantle is well developed, presenting rimoportulae and bearing coarse granules, which are more concentrated at the mantle edge. Comparisons with the related species Melosira arctica, M. moniliformis and M. nummuloides are made. Additionally, photomicrographs of M. arctica from the type material and Barents Sea, and of M. moniliformis from estuaries of Southern Brazil are included.

A new species of Cacatuocotyle (Monogenea, Dactylogyridae) parasitizing two species of Astyanax (Ostariophysi, Characidae) in southern Brazil

2014 ◽  
Vol 59 (4) ◽  
Author(s):  
Moisés Gallas ◽  
Cláudia Calegaro-Marques ◽  
Suzana Amato
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
External Surface ◽  
Accessory Piece ◽  
Rio Grande ◽  
The State ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
New Host ◽  
A New Species

AbstractA new species of Cacatuocotyle is described from the external surface of Astyanax aff. fasciatus and Astyanax jacuhiensis from Lake Guaíba, State of Rio Grande do Sul, Brazil. It differs from the other three species of the genus, recorded from Mexico and the State of Paraná, Brazil, by possessing an accessory piece with a long proximal portion, a U-shaped bar with irregular posterior margin in its midportion, and a haptor containing two circular thickenings with muscular anterior margins. Only one monogenean species, Urocleidoides astyanacis (= Characithecium costaricensis) was recorded for the host Astyanax aff. fasciatus, whereas none were known for A. jacuhiensis. This paper records a new host (A. jacuhiensis) for monogeneans in southern Brazil and extends southward with the geographical distribution of the genus Cacatuocotyle to the State of Rio Grande do Sul, Brazil.

Eleocharis pseudobulbosa, a new species of Cyperaceae from Southern Brazil (Capão Bonito, São Paulo)

Phytotaxa ◽  
2014 ◽  
Vol 166 (4) ◽  
pp. 293 ◽  
Author(s):  
TAMIRIS DAIANE DELGADO DE LIMA ◽  
ANDRÉ DOS SANTOS BRAGANÇA GIL ◽  
RAFAEL TREVISAN
Keyword(s):  
New Species ◽  
Cross Section ◽  
Related Species ◽  
Sao Paulo ◽  
São Paulo ◽  
Southern Brazil ◽  
Morphological Studies ◽  
A New Species

Eleocharis pseudobulbosa, a new species of Cyperaceae from Southern Brazil (Capão Bonito, São Paulo), is here described based on external morphological studies. This species is characterized by the presence of conspicuous stolons with straw-colored scales, forming a bulb-like structure in the growing points of the new culms; circular to oval culms in cross section; spikelets with small number of flowers [10–25(–30)]; achene small (0.6 mm long) and slightly reticulate; and stylopodium as wide as the achene. A detailed illustration and a diagnostic comparison with close morphological related species are presented.

Begonia ciliatifolia (Begoniaceae), a rare, critically endangered new species endemic from Santa Catarina, southern Brazil

Phytotaxa ◽  
2019 ◽  
Vol 407 (1) ◽  
pp. 43-50
Author(s):  
LUÍS ADRIANO FUNEZ ◽  
JULIO CESAR JARAMILLO
Keyword(s):  
New Species ◽  
Related Species ◽  
Small Area ◽  
Critically Endangered ◽  
Southern Brazil ◽  
Distribution Map ◽  
Santa Catarina ◽  
A New Species ◽  
Iucn Criteria

We describe here Begonia ciliatifolia, a new species from Santa Catarina, southern Brazil. We treat the species as a member of Begonia sect. Pritzelia, and discuss its differences to related species. Due the species small area of occurrence and the very specific habitat, the new species is assessed as critically endangered according to IUCN criteria. Additionally, we present a distribution map, field photographs and a key to the species of Begonia with peltate leaves and corniculate fruits of South Region of Brazil.

A new species of Myrceugenia (Myrtaceae) from Southern Brazil

Phytotaxa ◽  
2020 ◽  
Vol 435 (2) ◽  
pp. 208-212
Author(s):  
FÁBIO CHRISTIANO SPECK VIEIRA
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Related Species ◽  
Conservation Status ◽  
Brazilian Atlantic Forest ◽  
Southern Brazil ◽  
Santa Catarina ◽  
Serra Do Mar ◽  
Brazilian State ◽  
A New Species

Myrceugenia joinvillensis, a new species from the Brazilian Atlantic Forest is described and compared with related species. This taxon seems to be restricted to the Serra do Mar range in the Southern Brazilian state of Santa Catarina in the municipalities of Joinville and Schroeder. Additionally, there are provided information on its phenology, distribution and conservation status.

A new species of the subgenus Scheloribates (Topobates) (Acari: Oribatida: Scheloribatidae) from Panama

2020 ◽  
Vol 29 (2) ◽  
pp. 278-283
Author(s):  
S.G. Ermilov
Keyword(s):  
New Species ◽  
Body Size ◽  
Leaf Litter ◽  
Related Species ◽  
Large Body ◽  
Oribatid Mite ◽  
Neotropical Region ◽  
Large Body Size ◽  
First Time ◽  
A New Species

The oribatid mite subgenus Scheloribates (Topobates) Grandjean, 1958, is recorded from the Neotropical region for the first time. A new species of this subgenus is described from the leaf litter collected in Cayo Agua Island, Panama. Scheloribates (Topobates) panamaensis sp. nov. differs from its related species by the very large body size and presence of a strong ventrodistal process on the leg femora II–IV.

Soil tardigrades from the Antarctic Peninsula with a description of a new species and some remarks on the genusRamajendas(Eutardigrada: Isohypsibiidae)

Polar Record ◽  
2013 ◽  
Vol 50 (2) ◽  
pp. 176-182 ◽  
Author(s):  
Łukasz Kaczmarek ◽  
Karel Janko ◽  
Jerzy Smykla ◽  
Łukasz Michalczyk
Keyword(s):  
New Species ◽  
Antarctic Peninsula ◽  
Morphometric Characters ◽  
Antarctic Continent ◽  
Fourth Species ◽  
The Antarctic ◽  
A New Species ◽  
Mixed Samples ◽  
Hypsibius Dujardini

ABSTRACTIn thirteen (mostly soil) mixed samples, collected from nine localities on the Antarctic continent and some of the neighbouring islands, 788 specimens and 32 eggs of tardigrades were found. In total, five species were identified:Acutuncus antarcticus, Echiniscus jenningsi,Diphascon(D.)victoriae,Hypsibius dujardiniandRamajendas dastychisp. nov.A. antarcticuswas the most abundant (nearly 90% of all specimens) and was the prevailing taxon found in the majority of locations.R. dastychisp. nov. is the fourth species described in the exclusively Antarctic/sub-Antarctic genus. The new species differs from all other congeners by the presence of four gibbosities on the caudo-dorsal cuticle (configuration II:2–2) and also by some morphometric characters. In this paper we also briefly discuss the taxonomy and zoogeography of the genusRamajendas.

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