Neogastropod molluscs from the Miocene of western Amazonia, with comments on marine to freshwater transitions in molluscs

2002 ◽  
Vol 76 (2) ◽  
pp. 265-270 ◽  
Author(s):  
Geerat J. Vermeij ◽  
Frank P. Wesselingh
Keyword(s):  
New Species ◽  
Water Level ◽  
Late Miocene ◽  
Southeast Asian ◽  
South American ◽  
Seasonal Fluctuations ◽  
Early Late ◽  
A New Species ◽  
Freshwater Environments

Two neogastropod species occur in brackish intervals in the Pebas Formation (late Middle to early Late Miocene) of Peru and Colombia in western Amazonia. Purpura woodwardi Roxo, 1924, is assigned to Melongena Schumacher, 1817 (Melongenidae), and ?Nassarius reductus (Nassariidae) is recognized as a new species. These gastropods are among the very few marine invaders in the otherwise freshwater Pebas fauna. The small number of marine to freshwater transitions among South American molluscs contrasts with the situation among South American fishes and southeast Asian molluscs. It may be related to seasonal fluctuations in water level and anoxia in present-day South American freshwater environments, as well as to predation and productivity.

A new species of Cuora (Testudines: Geoemydidae) from the Miocene of Thailand and its evolutionary significance

2013 ◽  
Vol 150 (5) ◽  
pp. 908-922 ◽  
Author(s):  
WILAILUCK NAKSRI ◽  
HAIYAN TONG ◽  
KOMSORN LAUPRASERT ◽  
VARAVUDH SUTEETHORN ◽  
JULIEN CLAUDE
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
East Asia ◽  
Late Miocene ◽  
Evolutionary Significance ◽  
Northern Thailand ◽  
Limb Bones ◽  
Box Turtles ◽  
Early Late ◽  
A New Species

AbstractA new species of Cuora, Cuora chiangmuanensis sp. nov., is described on the basis of a nearly complete shell with limb bones from the late Middle – early Late Miocene Chiang Muan Mine, Phayao Province (Northern Thailand). C. chiangmuanensis is distinguished from other fossil and living Cuora species mainly on the basis of its plastral morphology. Among fossil and extant Cuora taxa, the new species appears to be a missing link between the taxa from Southeast Asia and those from East Asia. It represents the earliest record of the genus and demonstrates that by 11–12 Ma, Asian box turtles were already present in Southeast Asia.

A new species of Dichelyne (Nematoda, Cucullanidae) parasitizing sciaenid fishes from off the South American Atlantic coast

2009 ◽  
Vol 54 (1) ◽  
Author(s):  
Juan Timi ◽  
Ana Lanfranchi ◽  
Luiz Tavares ◽  
José Luque
Keyword(s):  
New Species ◽  
Atlantic Coast ◽  
Length Distribution ◽  
Distribution Patterns ◽  
Nematode Species ◽  
Valid Species ◽  
South American ◽  
Type Specimens ◽  
Pacific Waters ◽  
A New Species

AbstractA new nematode species Dichelyne (Cucullanellus) sciaenidicola sp. nov. is described based on specimens collected from the Whitemouth croaker Micropogonias furnieri (Desmarest) and the Argentine croaker Umbrina canosai Berg, from coastal waters of Argentina and Brazil. These nematodes were firstly identified as D. (C.) elongatus (Törnquist, 1931), a commonly reported species from M. furnieri in South American Atlantic waters. However, other species of Dichelyne have so far been reported from this host in the same area, namely D. (C.) rodriguesi (Pinto, Fábio et Noronha, 1970), D. (C.) amaruincai (Freitas, Vicente et Ibañez, 1969) and D. (Dichelyne) micropogonii Pereira et Costa, 1996. A careful re-examination of these parasites, as well as of type specimens of all species reported from M. furnieri, revealed that these nematodes represented a new species. The new species is distinguished from most of its congeners by having papillae 5–7 and 9 forming a subventral line close to cloaca, this feature is shared with other 6 species [D. (C.) dichelyneformis (Szidat, 1950), D. (C.) fraseri (Baylis, 1929), D. (C.) abbreviatus (Rudolphi, 1819), D. (C.) adriaticus (Törnquist, 1931), D. (C.) minutus (Rudolphi, 1819) and D. (C.) mariajuliae Alarcos, Timi, Etchegoin et Sardella, 2006)], which are readily distinguished by their body size, spicules length, distribution patterns of other papillae and position of the excretory pore and deirids. Also, D. (C.) elongatus from Umbrina canariensis (Valenciennes) from West Africa is established as a new species Dichelyne (Cucullanellus) yvonnecampanae sp. nov.; D. (C.) amaruincai from Pacific waters is considered as a valid species, D. (D.) micropogonii is regarded as species inquirendae and D. (C.) rodriguesi is identified as Cucullanus sp.

Hemimycena longipleurocystidiata (Mycenaceae, Agaricomycetes), a new species from the Argentinean Atlantic Forest 

Phytotaxa ◽  
2014 ◽  
Vol 177 (1) ◽  
pp. 49 ◽  
Author(s):  
Nicolás Niveiro ◽  
Orlando Fabian Popoff ◽  
Edgardo Albertó
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Fungal Species ◽  
South American ◽  
A New Species

The Atlantic Forest is the second largest South American tropical-subtropical rainforest and one of the most diverse ecosystems on earth. Hemimycena longipleurocystidiata, a fungal species collected in the Argentinean Atlantic forest, is proposed as new. It is characterized by its whitish and large basidiomata with large pleuro- and cheilocystidia. The species is here described and illustrated and a key is provided to the Hemimycena species known from Argentina.

Salicornia cuscoensis (Amaranthaceae/Chenopodiaceae), a new species from Peru (South America)

Phytotaxa ◽  
2017 ◽  
Vol 319 (3) ◽  
pp. 254 ◽  
Author(s):  
M. ÁNGELES ALONSO ◽  
MANUEL B. CRESPO ◽  
HELMUT FREITAG
Keyword(s):  
New Species ◽  
South America ◽  
Morphological Characters ◽  
Tierra Del Fuego ◽  
South American ◽  
Habitat Distribution ◽  
Closely Related Species ◽  
Molecular Analyses ◽  
Southern Patagonia ◽  
A New Species

The name Salicornia cuscoensis given to a plant from high Andean saltmarshes near Cusco [Cuzco] and Ayacucho, Peru (South America) is validated by a diagnosis and description. The main morphological characters that separate S. cuscoensis from other closely related species are creeping habit, delicate branches, inflorescence of short and thin spikes, and seed indumentum. The new species clearly differs from other perennial Salicornia taxa growing in high Andean saltmarshes such as S. pulvinata and S. andina. The former forms small compact cushions producing very short, few-flowered inflorescences. The latter shows woody stems and forms larger rounded carpets. Morphologically, S. cuscoensis is also similar to S. magellanica, a species growing along the seashore in southern Patagonia and Tierra del Fuego, but the latter has shorter and wider inflorescences and larger seeds with a different type and arrangement of indumentum. Molecular analyses also supported the separation of S. cuscoensis. Data on habitat, distribution and phylogenetic relationships are presented for the new species and its relatives, and an identification key is given for the South American taxa of the genus Salicornia.

A new species of trypanosome, Trypanosoma desterrensis sp. n., isolated from South American bats

Parasitology ◽  
2003 ◽  
Vol 127 (3) ◽  
pp. 265-271 ◽  
Author(s):  
E. C. GRISARD ◽  
N. R. STURM ◽  
D. A. CAMPBELL
Keyword(s):  
New Species ◽  
Dna Sequence ◽  
Sequence Data ◽  
Rrna Gene ◽  
South American ◽  
Sequence Variability ◽  
Dna Sequence Data ◽  
Hybridization Probes ◽  
5S Rrna Gene ◽  
A New Species

Trypanosomes isolated from South American bats include the human pathogen Trypanosoma cruzi. Other Trypanosoma spp. that have been found exclusively in bats are not well characterized at the DNA sequence level and we have therefore used the SL RNA gene to differentiate and characterize kinetoplastids isolated from bats in South America. A Trypanosoma sp. isolated from bats in southern Brazil was compared with the geographically diverse isolates T. cruzi marinkellei, T. vespertilionis, and T. dionisii. Analysis of the SL RNA gene repeats revealed size and sequence variability among these bat trypanosomes. We have developed hybridization probes to separate these bat isolates and have analysed the DNA sequence data to estimate their relatedness. A new species, Trypanosoma desterrensis sp. n., is proposed, for which a 5S rRNA gene was also found within the SL RNA repeat.

Taxonomy of the South American genus Pachypops Gill 1861 (Teleostei: Perciformes: Sciaenidae), with the description of a new species

Zootaxa ◽  
2002 ◽  
Vol 26 (1) ◽  
pp. 1 ◽  
Author(s):  
LILIAN CASATTI
Keyword(s):  
New Species ◽  
River Basins ◽  
Junior Synonym ◽  
Valid Species ◽  
Nominal Species ◽  
South American ◽  
The South ◽  
Haemal Spine ◽  
A New Species ◽  
Fin Spines

Pachypops is a South American freshwater sciaenid genus characterized by having two anal-fin spines, three mental barbels, an inferior mouth, a swimbladder with a pair of short appendages anteriorly and a pair of longer appendages projected posteriorly, and the haemal spine of the first caudal distinctly expanded. Three valid Pachypops species are recognized herein. Of the six nominal species previously assigned to Pachypops, two are herein recognized as valid (Perca fourcroi and Micropogon trifilis), two are assigned to other sciaenid genera (Pachypops adspersus and Pachypops cevegei) and two are considered junior synonyms (Corvina biloba and Pachypops camposi). A seventh nominal species, Pachyurus nattereri, formerly considered a valid species of Pachyurus, is determined to be a junior synonym of Pachypops fourcroi, and lectotype and paralectotypes are designated for it. Pachypops fourcroi occurs in the Orinoco, Amazonas, Essequibo, Corantijn, and Approuague River basins, and Pachypops trifilis in rivers of Guyana and middle and lower reaches of the Rio Amazonas basin. A third valid species, Pachypops pigmaeus n. sp., is herein described from tributaries of the Rio Amazonas, Brazil.

scholarly journals A new terrestrial snail species (Gastropoda: Bulimulidae) from the Región de Antofagasta, northern Chile

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3538
Author(s):  
Juan Francisco Araya ◽  
Abraham S.H. Breure
Keyword(s):  
New Species ◽  
Coastal Area ◽  
First Record ◽  
Coastal Areas ◽  
Snail Species ◽  
South American ◽  
Northern Chile ◽  
Terrestrial Snails ◽  
A New Species ◽  
Coastal Range

A new species of Scutalus Albers, 1850 (Gastropoda: Bulimulidae), Scutalus chango sp. n., is described from a coastal area of northern Chile. Empty shells of this new species were found buried in sand and under boulders and rocks in the foothills of the Chilean Coastal Range at Paposo, Región de Antofagasta. This new species is distinguished from all other Chilean terrestrial snails by its slender shell with a flared and reflected aperture, and by the presence of a columellar fold. This is the first record of Scutalus in Chile, and the southernmost record for this endemic South American bulimulid genus. The presence of this species in Paposo highlights the need for further research and for conservation guidelines in coastal areas of northern Chile, which have comparatively high levels of biodiversity and endemism.

scholarly journals Description of New American Carduelis/Spinus Bird Species in La Paz (Bolivia): C./S. lapazensis.

2020 ◽  
Vol 13 (1) ◽  
pp. 24-33
Author(s):  
Antonio Arnaiz-Villena ◽  
Valentín Ruiz-del-Valle ◽  
Fabio Suarez-Trujillo ◽  
Adrian Lopez-Nares ◽  
Alvaro Callado ◽  
...  
Keyword(s):  
New Species ◽  
North America ◽  
Bird Species ◽  
South American ◽  
Cyt B ◽  
Species Definition ◽  
La Paz ◽  
Evolutionary Radiation ◽  
And Behavior ◽  
A New Species

Introduction: South American siskins (Genus Carduelis/Spinus) are the outcome of regional evolutionary radiation from an extant (or other extinct) species: C. notata, a North America siskin, which thrives in Mexico subtropical areas and is parental of one of the three described North American siskin radiations. Methods: Speciation and/or subspeciation of this South American siskin radiation have probably occurred during Pleistocene Epoch. In the present paper, a new species/subspecies akin to C./S. atrata is described by genetic and phenotypic parameters: this new species/subspecies was previously considered a subspecies of C./S. xanthogastra, which thrives further North and is separated about 1,762 km, 1,094 miles, from this described subspecies, Carduelis/ Spinus xanthogastra stejnegeri. Results: Our genetic study using mt cyt b, phenotypic and behavior observations show that this putative C./S. xanthogastra subspecies is either a different species or a C./S. atrata subspecies; we have proposed a provisional name for this finch, C./S. lapazensis, instead of C./S. x. stejnegeri. Conclusion: Species definition is movable and controversial, and it is uncertain in South American siskins, which all show a close genetic and phenotypical relationship, which may be still immersed in speciation processes since Pleistocene Epoch.

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