Scissurella clathrata in the San Jorge Gulf (Argentina) and the identity of the enigmatic S. dalli Bartsch, 1903 (Gastropoda: Scissurellidae)

Zoosymposia ◽  
2008 ◽  
Vol 1 ◽  
pp. 265-269
Author(s):  
DIEGO G. ZELAYA ◽  
DANIEL L. GEIGER
Keyword(s):  
United States ◽  
Atlantic Ocean ◽  
Smithsonian Institution ◽  
Original Description ◽  
The United States ◽  
Type Locality ◽  
National Museum ◽  
Southwestern Atlantic ◽  
Southwestern Atlantic Ocean ◽  
First Time

Scissurella dalli Bartsch, 1903, from the southwestern Atlantic Ocean has been reported at least six times in the malacological literature. However, the species is thus far known only from the original description; it was never fi gured; and the type material is missing from the original repository, the United States National Museum, Smithsonian Institution. In the present study, we examine specimens of a scissurellid collected adjacent to the type locality of Scissurella dalli, and evaluate their identity. These specimens proved to correspond to Scissurella clathrata Strebel, 1908. Even though this species shows some similarity with the original description of Scissurella dalli, the vague description by Bartsch lacking details and even containing contradictory indications, led us to the conclusion that they are not conspecifi c. Thus, Scissurella clathrata is reported for the first time at the type locality of S. dalli, and the latter remains as a nomen dubium.

A redescription of Metopa species (Amphipoda, Stenothoidae) based on the type material. 2. The United States National Museum of Natural History (NMNH)

Zootaxa ◽  
2009 ◽  
Vol 2309 (1) ◽  
pp. 43-68
Author(s):  
ANNE HELENE S. TANDBERG
Keyword(s):  
United States ◽  
Natural History ◽  
Smithsonian Institution ◽  
The United States ◽  
Type Locality ◽  
Type Material ◽  
National Museum ◽  
United States National Museum ◽  
Line Drawings

This paper presents redescriptions of amphipods in the genus Metopa (Stenothoidae) in the type-collections of the United States National Museum of Natural History, Smithsonian Institution. Typeand paratype-material is used for Metopa spinicoxa and M. stelleri. The material used for M. dawsoni is from a station very close to the type locality, and identified by Barnard, who is the author of the species. We have used material from the Albatross expedition in 1906, identified by Shoemaker, for M. cristata and M. majuscula, both originally described by Gurjanova. All species are redescribed using line drawings, and comparisons with the original texts and figures.Key words:

scholarly journals New discoveries for the subfamily Phtisicinae Vassilenko, 1968 (Crustacea: Senticaudata) from the Brazilian coast

2020 ◽  
Author(s):  
Fábio da Motta Mauro ◽  
Priscila Soares do Nascimento ◽  
Cristiana Silveira Serejo
Keyword(s):  
Atlantic Ocean ◽  
Original Description ◽  
Brazilian Coast ◽  
Southwestern Atlantic ◽  
Espírito Santo ◽  
Campos Basin ◽  
Southwestern Atlantic Ocean ◽  
The Caribbean ◽  
Espirito Santo ◽  
First Time

Amphipod material collected from Brazil on Ilha do Arvoredo, (Santa Catarina), Campos Basin, (Rio de Janeiro) and Espírito Santo Basin (Espírito Santo) in the southwestern Atlantic Ocean yielded new taxonomic findings for the subfamily Phtisicinae Vassilenko, 1968. Hemiproto wigleyi McCain, 1968, previously recorded from the Gulf of Mexico to the Caribbean Sea, is herein redescribed and recorded for the first time from the Brazilian coast. The type material of Phtisica verae Quitete, 1979, a poorly described species recorded from Brazil and based only on its original description, was examined and considered herein as a junior synonym of P. marina Slabber, 1769, a well-known and widely distributed species from the Atlantic Ocean and the Mediterranean Sea. In this paper, Phtisica marina is redescribed, with its two morphotypes of male gnathopod two, and compared with previous descriptions. The geographic distribution of both H. wigleyi and P. marina is provided. 

The discreditation of girdite

2017 ◽  
Vol 81 (5) ◽  
pp. 1125-1128 ◽  
Author(s):  
Anthony R. Kampf ◽  
Stuart J. Mills ◽  
Mike S. Rumsey
Keyword(s):  
United States ◽  
Natural History ◽  
Smithsonian Institution ◽  
Original Description ◽  
The United States ◽  
National Museum ◽  
X Ray Diffraction ◽  
History Museum ◽  
X Ray ◽  
Cochise County

AbstractGirdite, a mineral described byWilliams in 1979 from the Grand Central mine, Tombstone, Cochise County, Arizona, USA, has been re-examined by powder X-ray diffraction, single-crystal X-ray diffraction and electron microprobe. Type material from The Natural History Museum, London and the United States National Museum of Natural History (Smithsonian Institution) was examined. The original description of girdite is shown to have been based upon data obtained from at least two and possibly three different phases, one corresponding to ottoite and another probably corresponding to oboyerite, although the latter itself appears to be a mixture. The discreditation of girdite as a valid mineral species has been approved by the IMA-CNMNC, Proposal 16-G.

scholarly journals Remarks on the morphology and distribution of some rare centric diatoms in southern Brazilian continental shelf and slope waters

2012 ◽  
Vol 60 (4) ◽  
pp. 415-427 ◽  
Author(s):  
Marinês Garcia ◽  
Clarisse Odebrecht
Keyword(s):  
Atlantic Ocean ◽  
Continental Shelf ◽  
Southwestern Atlantic ◽  
Patos Lagoon ◽  
La Plata ◽  
Centric Diatoms ◽  
Southwestern Atlantic Ocean ◽  
The Family ◽  
Scanning Electron Microcopy ◽  
First Time

This paper provides information on the morphology and occurrence of extant diatoms of the family Asterolampraceae and Azpeitia species of the southernmost Brazilian continental shelf and slope waters in the Southwestern Atlantic Ocean (28 -34ºS), under the influence of Tropical, Subtropical, Subantarctic Waters, terrestrial discharges from La Plata River and Lagoa dos Patos lagoon. Plankton was sampled (20 µm net; vertical hauls) at the same 27 stations in winter 2005 and summer 2007. Among Asterolampraceae, Asteromphalus flabellatus was the most frequent species (57% of samples) observed mainly in winter samples (92%) in Subtropical Shelf Water but also under the influence of La Plata River plume (salinity <35). Lower frequencies were observed for Asterolampra marylandica, Asteromphalus elegans, Asteromphalus heptactis and Spatangidium arachne. Four species of Azpeitia were observed: A. barronii and A. neocrenulata for the first time in the South Atlantic Ocean while A. africana and A. nodulifer had already been registered in equatorial and southern areas of Brazil. All Azpeitia species were rare (19%) in offshore samples (100-200 m depth. Remarks on the morphology based on light and scanning electron microcopy observations are provided along with their distribution in the study area.

scholarly journals Morphology and distribution of two epizoic diatoms (Bacillariophyta) in Brazil

2012 ◽  
Vol 26 (4) ◽  
pp. 836-841 ◽  
Author(s):  
Luciano Felício Fernandes ◽  
Mariana Calixto-Feres
Keyword(s):  
Atlantic Ocean ◽  
Body Surface ◽  
Range Limits ◽  
Brazilian Coast ◽  
Entire Body ◽  
Southwestern Atlantic ◽  
Southwestern Atlantic Ocean ◽  
Electron Microscopes ◽  
First Time ◽  
Euterpina Acutifrons

The epizoic diatoms Pseudohimantidium pacificum and Falcula hyalina, which live on copepods, were investigated using light and electron microscopes, based on material gathered from different marine environments along the Brazilian coast. Pseudohimantidium pacificum is reported for the first time for the Southwestern Atlantic Ocean, significantly enlarging its range of geographic distribution. This species usually covers the entire body surface of the copepods Corycaeus amazonicus and Euterpina acutifrons, and of cypris larvae of Cirripedia. Falcula hyalina uses a higher number of copepod hosts, particularly Oithona oswaldocruzii, Pseudodiaptomus richardii and Acartia spp. The valve morphology and biometrical data of both diatoms were within the range limits recorded in the literature, including the original publications. Both species occurred in all the sampling stations along the Brazilian coastline stretching from 12°S down to 28°S. Falcula hyalina had already been found as far as latitude 31°S in the Southwestern Atlantic Ocean.

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