Foliose and placodioid species of the lichen family Physciaceae in southernmost Chile

2002 ◽  
Vol 34 (4) ◽  
pp. 311-320 ◽  
Author(s):  
Arve Elvebakk ◽  
Roland Moberg
Keyword(s):  
South America ◽  
Northern Hemisphere ◽  
National Park ◽  
Calcareous Soil ◽  
Distribution Patterns ◽  
The Other ◽  
South American ◽  
Rock Outcrops ◽  
Habitat Ecology ◽  
Torres Del Paine

AbstractTen foliose and placodioid species of Physciaceae are reported from the National Park Torres del Paine and from other areas in southernmost Chile. Phaeophyscia constipate and Physconia perisidiosa are reported as new to the Southern Hemisphere, Phaeophyscia endococcina var. endococcina and Phaeorrhiza nimbosa as new to South America, and Dimelaena oreina and Physcia kalbii as new to Chile. The latter was recorded only from the island of Chiloé. Dimelaena appears to be rare in Magallanes and has been recorded only from one steppe locality. Phaeophyscia constipate and Phaeorrhiza nimbosa appear to be confined to the driest steppes, in areas with occurrences of rock outcrops associated with calcareous soil. Physconia muscigena has a similar habitat ecology, but a wider distribution, and is quite common. Physconia perisidiosa and Physcia adscendens were found to be very common in all bioclimatic zones surveyed in the lowland of Torres del Paine. The Physciaceae species treated here are all bipolar or subcosmopolitan, and belong to genera lacking an austral or South American element in the area studied, in contrast to the pattern in all other reasonably large macrolichen groups, except among cetrarioid genera. Their habitat ecology is also very similar to conditions known in the Northern Hemisphere. On the other hand, other widely distributed Northern Hemisphere species such as Physcia stellaris and P. aipolia have known distribution patterns in South America which are disjunct and northern and very different from those of the species treated here.

Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers

Zootaxa ◽  
2020 ◽  
Vol 4751 (1) ◽  
pp. 75-104
Author(s):  
MAURICIO M. ROCHA ◽  
ELIANA M. CANCELLO
Keyword(s):  
New Species ◽  
South America ◽  
Geographic Distribution ◽  
Comparative Anatomy ◽  
Distribution Patterns ◽  
South American ◽  
The South ◽  
South American Species ◽  
Two New Species ◽  
First Time

In this contribution we present updates on the taxonomy and morphology of the South American species of Amitermes. Two new species are described: Amitermes bandeirai, sp. n., from Brazil, and Amitermes lilloi, sp. n., from Argentina. Amitermes nordestinus is a junior synonym of Amitermes aporema. The imago of A. aporema is described for the first time. Detailed comparative gut anatomy of the eight species is presented for the first time. The geographic distribution of Amitermes in South America is expanded and the distribution patterns of some species are discussed. 

A clarification of the name Carex hypsipedos C.B.Clarke (Cyperaceae) and a new name for the South American Carex section Acrocystis taxon

Phytotaxa ◽  
2017 ◽  
Vol 291 (4) ◽  
pp. 287 ◽  
Author(s):  
D. B. POINDEXTER ◽  
M. ESCUDERO ◽  
P. JIMÉNEZ-MEJÍAS
Keyword(s):  
South America ◽  
Original Description ◽  
The Other ◽  
South American ◽  
The South ◽  
New Name ◽  
Additional Detail ◽  
Mixed Collection

In 1906, Clarke described C. hypsipedos based on specimens of Weberbauer 2617 and placed this species in subgenus Vignea. In 1909, Kükenthal also described the name C. umbellata var. depressa on the basis of the number Weberbauer 2617, a species attributed to section Acrocystis of subgenus Carex. Wheeler in 1988 also placed C. hypsipedos in section Acrocystis while reducing Kükenthal’s name to synonymy. During a recent herbarium survey, we studied syntypes corresponding to Weberbauer 2617 at B, F, G, and MOL. The study of these materials revealed important inconsistencies between the specimens and Clarke’s protologue and Wheeler’s study, suggesting that Weberbauer 2617 is a mixed collection of two different species. One plant conforms to Carex sect. Acrocystis, while the other bears resemblance to subgenus Vignea. Several salient characters distinguish these two taxa from each other, most notably including: stigmas 3 vs. stigmas 2, achenes trigonous vs. lenticular, and perigynium pubescent to puberulent vs. glabrous. Carex hypsipedos from Peru, corresponding to Clarke’s original description, is here lectotypified. The Carex sect. Acrocystis species is assigned a new name, Carex punicola, from Argentina, Bolivia, and Peru (South America). In addition to Wheeler’s (1988) observations, we here provide additional detail and illustration of this species. It is closely related to C. geophila, another American species in section Acrocystis.

scholarly journals Migration in South America: an overview of the austral system

1994 ◽  
Vol 4 (2-3) ◽  
pp. 91-107 ◽  
Author(s):  
R. Terry Chesser
Keyword(s):  
South America ◽  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Resource Availability ◽  
South American ◽  
Global Migration ◽  
Migration System ◽  
East West ◽  
Passerine Migration ◽  
Tyrant Flycatchers

SummaryAustral migrants are species that breed in temperate areas of South America and migrate north, towards or into Amazonia, for the southern winter. Migrations among these species are the most extensive of Southern Hemisphere migrations, and the austral system represents a third major migration system, in the sense that the term has been applied to Northern Hemisphere temperate-tropical migration. The geography of South America greatly influences the austral system. Lack of east-west geographical barriers and the shape of the continent promote a pattern of partially overlapping breeding and wintering ranges. The suboscine family Tyrannidae, the tyrant-flycatchers, is the largest group of austral migrants, with other major families including Emberizidae, Anatidae, Furnariidae, Accipitridae and Hirundinidae. Tyrant-flycatchers constitute more than one-half of the passerine austral migrants and roughly one-third of total austral migrants, a taxonomic domination seen in no other global migration system. Parallels exist, however, between austral migration and the Nearctic and Palearctic systems. Many of the same families, including Hirundinidae, Anatidae and Charadriidae, exhibit similarly high degrees of migratory behavi-our in each system. Passerine migration in the austral system is similar in numbers to that of the Nearctic-Neotropical system, but species migrate shorter distances and breed in more open and scrubby habitats. Possible differences in year-round resource availability between South American and North American temperate forests, in addition to differing availability of these habitats, may contribute to the low numbers of forest-dwelling austral migrants.

scholarly journals The role of vicariance and dispersal on the temporal range dynamics of forest vipers in the Neotropical region

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257519
Author(s):  
Matheus Pontes-Nogueira ◽  
Marcio Martins ◽  
Laura R. V. Alencar ◽  
Ricardo J. Sawaya
Keyword(s):  
South America ◽  
Atlantic Forest ◽  
Distribution Patterns ◽  
Neotropical Region ◽  
South American ◽  
Geographic Ranges ◽  
Sister Clade ◽  
Best Fitting ◽  
Range Dynamics ◽  
Dated Phylogeny

The emergence of the diagonal of open/dry vegetations, including Chaco, Cerrado and Caatinga, is suggested to have acted as a dispersal barrier for terrestrial organisms by fragmenting a single large forest that existed in South America into the present Atlantic and Amazon forests. Here we tested the hypothesis that the expansion of the South American diagonal of open/dry landscapes acted as a vicariant process for forest lanceheads of the genus Bothrops, by analyzing the temporal range dynamics of those snakes. We estimated ancestral geographic ranges of the focal lancehead clade and its sister clade using a Bayesian dated phylogeny and the BioGeoBEARS package. We compared nine Maximum Likelihood models to infer ancestral range probabilities and their related biogeographic processes. The best fitting models (DECTS and DIVALIKETS) recovered the ancestor of our focal clade in the Amazon biogeographic region of northwestern South America. Vicariant processes in two different subclades resulted in disjunct geographic distributions in the Amazon and the Atlantic Forest. Dispersal processes must have occurred mostly within the Amazon and the Atlantic Forest and not between them. Our results suggest the fragmentation of a single ancient large forest into the Atlantic and Amazon forests acting as a driver of vicariant processes for the snake lineage studied, highlighting the importance of the diagonal of open/dry landscapes in shaping distribution patterns of terrestrial biota in South America.

New records of Neogene Xenarthra (Mammalia) from eastern Puna (Argentina): diversity and biochronology

2019 ◽  
Vol 93 (06) ◽  
pp. 1258-1275
Author(s):  
Sofía I. Quiñones ◽  
Ángel R. Miño-Boilini ◽  
Alfredo E. Zurita ◽  
Silvina A. Contreras ◽  
Carlos A. Luna ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
South America ◽  
Late Miocene ◽  
New Records ◽  
The Other ◽  
South American ◽  
Sister Clade ◽  
Cenozoic Era ◽  
Climatic Optimum ◽  
High Diversity

AbstractXenarthra is an endemic South American lineage of mammals, probably the sister clade of the other placental mammals. The oldest records of Xenarthra are from the latest Paleocene, although its current diversity is much lower than that recorded in some intervals of the Cenozoic Era. A new Neogene Xenarthra (Pilosa and Cingulata) assemblage from two localities of the Argentine Eastern Puna (Calahoyo and Casira) is described. The newly recorded taxa—Cingulata, Dasypodidae, Eutatini: Stenotatus sp. indet. and Eutatini indet., Euphractini: Macrochorobates scalabrinii (Moreno and Mercerat, 1891), and Tardigrada, Mylodontinae: cf. Simomylodon sp. indet. and Simomylodon cf. S. uccasamamensis Saint-André et al., 2010—and those already published from Calahoyo—Cingulata: Macrochorobates chapadmalensis (Ameghino, 1908), Eosclerocalyptus sp. indet., and Tardigrada, Megatheriidae: Pyramiodontherium bergi (Moreno and Mercerat, 1891)—suggest a middle–late Miocene age for the fossil-bearing levels. In Calahoyo, the presence of Stenotatus sp. indet., in addition to some rodents currently under study in the lower levels, suggest a closer similarity with the palaeofauna of Cerdas (southern Bolivia), probably involving the last part of the Miocene Climatic Optimum. The Xenarthra recorded in the middle and upper levels of Calahoyo and Casira suggest a late Miocene–Pliocene age. A comparative analysis between Calahoyo and Casira highlights the absence of Cingulata in the latter and a high diversity in the former. This situation probably indicates different paleoenvironmental conditions. Finally, we present the first certain record of the genus Simomylodon Saint-André et al., 2010 in Argentina, which includes the oldest record of dermal ossicles for sloths in South America.

A new subspecies of Jodina rhombifolia (Santalales: Cervantesiaceae), with taxonomical considerations

Phytotaxa ◽  
2019 ◽  
Vol 425 (4) ◽  
pp. 208-218
Author(s):  
MARCELO D. ARANA ◽  
MARÍA LUJÁN LUNA
Keyword(s):  
South America ◽  
Transition Zone ◽  
Geographical Distribution ◽  
Distribution Patterns ◽  
Neotropical Region ◽  
Identification Key ◽  
South American ◽  
Monotypic Genus ◽  
New Subspecies ◽  
South Eastern

The monotypic genus Jodina is endemic from central to south-eastern South America, where it grows from southern Bolivia and Brazil, Uruguay, to northern and central Argentina. The only species included in the genus is Jodina rhombifolia, a small hemiparasitic tree about 4–8 m high that is characteristic of the chacoan environments of the Neotropical region and Monte from the South American transition zone. As part of the floristic updates in the Neotropical and Andean regions of South America, the nomenclature of taxa related to Jodina rhombifolia was re-examined. Owing to the morphological and anatomical differences observed, and the well-delimited geographical distribution patterns that suggest the existence of two distinguishable subspecific entities, a new subspecies of Jodina rhombifolia is proposed here. Two lectotypes are designated and the nomenclature is clarified. An identification key, complete descriptions of the taxa and geographical distribution of the subspecies are also provided.

A distinctive new species of wood lizard (Hoplocercinae, Enyalioides) from the Yanachaga Chemillen National Park in central Peru

Zootaxa ◽  
2011 ◽  
Vol 3109 (1) ◽  
pp. 39 ◽  
Author(s):  
PABLO J. VENEGAS ◽  
VILMA DURAN ◽  
CAROLL Z. LANDAURO ◽  
LESLY LUJAN
Keyword(s):  
New Species ◽  
South America ◽  
National Park ◽  
The Other ◽  
Adult Males ◽  
Transverse Line ◽  
The Andes ◽  
A New Species

We describe a new species of Enyalioides from a mid-elevation premontane forest in central Peru. This represents the seventh species of Enyalioides known to occur east of the Andes in South America; the other six species are E. cofanorum, E. laticeps, E. microlepis, E. palpebralis, E. praestabilis, and E. rubrigularis. Among other characters, the new species is distinguished from other Enyalioides by the combination of an orange blotch on the antehumeral region (in adult males), 30 or fewer longitudinal rows of dorsals in a transverse line between dorsolateral crests at midbody, ventral scales strongly keeled, and caudal scales heterogeneous in size on each autotomic segment. The new species is most similar morphologically to E. cofanorum and E. microlepis.

A morphometric evaluation of the subspecies of Fragaria chiloensis

1998 ◽  
Vol 76 (2) ◽  
pp. 290-297 ◽  
Author(s):  
Paul M Catling ◽  
Sue Porebski
Keyword(s):  
Discriminant Analysis ◽  
South America ◽  
North American ◽  
The Other ◽  
South American ◽  
Taxonomic Rank ◽  
Fragaria Chiloensis ◽  
America South ◽  
The Relationship ◽  
Morphometric Evaluation

To evaluate the relationship between the four subspecies of Fragaria chiloensis, 14 characters were measured in 95 plants. F ratios from ANOVA were used to determine and apply the optimal characters for subspecies separation. Discriminant analysis indicated that the Hawaiian ssp. sandwicensis was entirely distinct, differing from the other subspecies in having longer leaflets and longer hairs on the undersurface of the leaflets and more numerous leaflet veins. The South American and North American plants were significantly different but overlapped to a degree. The former differed primarily by having mostly 6-10 petals, instead of having 5-6 (rarely 7) petals. The two North American subspecies overlapped extensively and may be best transferred to a lower taxonomic rank. A key to the subspecies is included.Key words: Fragaria chiloensis, ssp. pacifica, ssp. lucida, ssp.sandwicensis, ssp. chiloensis, Rosaceae, strawberry, taxonomy, classification, morphology, North America, South America, Hawaii.

Latitude does not influence cavity entrance orientation of South American avian excavators

The Auk ◽  
2021 ◽  
Author(s):  
Valeria Ojeda ◽  
Alejandro Schaaf ◽  
Tomás A Altamirano ◽  
Bianca Bonaparte ◽  
Laura Bragagnolo ◽  
...  
Keyword(s):  
South America ◽  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Spatial Scales ◽  
Probability Model ◽  
Selection Procedure ◽  
Circular Data ◽  
South American ◽  
Key Driver

Abstract In the Northern Hemisphere, several avian cavity excavators (e.g., woodpeckers) orient their cavities increasingly toward the equator as latitude increases (i.e. farther north), and it is proposed that they do so to take advantage of incident solar radiation at their nests. If latitude is a key driver of cavity orientations globally, this pattern should extend to the Southern Hemisphere. Here, we test the prediction that cavities are oriented increasingly northward at higher (i.e. colder) latitudes in the Southern Hemisphere and describe the preferred entrance direction(s) of 1,501 cavities excavated by 25 avian species (n = 22 Picidae, 2 Trogonidae, 1 Furnariidae) across 12 terrestrial ecoregions (15°S to 55°S) in South America. We used Bayesian projected normal mixed-effects models for circular data to examine the influence of latitude, and potential confounding factors, on cavity orientation. Also, a probability model-selection procedure was used to simultaneously examine multiple orientation hypotheses in each ecoregion to explore underlying cavity-orientation patterns. Contrary to predictions, and patterns from the Northern Hemisphere, birds did not orient their cavities more toward the equator with increasing latitude, suggesting that latitude may not be an important underlying selective force shaping excavation behavior in South America. Moreover, unimodal cavity-entrance orientations were not frequent among the ecoregions analyzed (only in 4 ecoregions), whereas bimodal (in 5 ecoregions) or uniform (in 3 ecoregions) orientations were also present, although many of these patterns were not very clear. Our results highlight the need to include data from under-studied biotas and regions to improve inferences at macroecological scales. Furthermore, we suggest a re-analysis of Northern Hemisphere cavity orientation patterns using a multi-model approach, and a more comprehensive assessment of the role of environmental factors as drivers of cavity orientation at different spatial scales in both hemispheres.

New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae)

Zootaxa ◽  
2011 ◽  
Vol 3074 (1) ◽  
pp. 1 ◽  
Author(s):  
PHILIP D. PERKINS
Keyword(s):  
New Species ◽  
South America ◽  
National Park ◽  
South American ◽  
The South ◽  
South American Species ◽  
San Luis ◽  
Water Beetle ◽  
Species Complexes ◽  
Cerro De La Neblina

The South American species of the water beetle genus Hydraena Kugelann, 1794, are revised, based on the study and databasing of 2,418 specimens. New collection records are provided for 14 previously described species, and 54 new species are described. The South American fauna now comprises 82 species, only three of which are also known to be present outside of South America. Two new species groups are described, and several new species complexes are diagnosed. A neotype is designated for Hydraena paraguayensis Janssens. High resolution digital images of the holotypes of new species are presented, asare images of the primary types of 18 previously described species (online versions in color). Geographic distributions of all South American Hydraena are mapped. Male genitalia, representative female terminal abdominal segments and representative spermathecae are illustrated. New species of Hydraena are: H. altiphila (Venezuela, Rio Milla at Merida Zoo); H. amazonica (Peru, Iquitos); H. ampla (Ecuador, Quevedo, 66 km E); H. atroscintilla (Ecuador, Nono, 15.1 km NW); H. beniensis (Bolivia, 40 km E San Borja, Estacion Biologica Beni, Palm Camp at Rio Curiraba); H. boliviana (Bolivia, 40 km E San Borja, Estacion Biologica Beni, Palm Camp at Rio Curiraba); H. buscintilla (Suriname, Sipaliwini District, Camp 3, Wehepai); H. challeti (Colombia, 8.2 km NE Guarne on Hwy to Bogota); H. cherylbarrae (Venezuela, Puerto Ayacucho (40 km S), El Tobogan, Cano Coromoto); H. clinodorsa (Bolivia, Yungas Val.); H. clystera (Bolivia, Chulumani); H. cochabamba (Bolivia, Cochabamba, 105 km E Yungas, nr. Rio Carmen Mayu (Cochabamba Villa Tunari Rd.); H. concepcionica (Paraguay, Est. San Luis); H. cordispina (Peru, Parque Manu, Pakitza, Trocha Dos, c.53); H. curvosa (Brazil, Para, Rio Xingu Camp, Altamira (ca 60 km S), 1st jungle stream on trail 4); H. d-concava (Peru, Quita Calzone Rd., at km 164); H. dariensis (Colombia, Rio Atrato, Sautata); H. diffusa (Paraguay, Est. San Luis); H. duohamata (Venezuela, Cerro de la Neblina, 1.5 km S Basecamp); H. ecuadormica (Ecuador, Quevedo); H. fasciola (Ecuador, oil production platform "Villano B"); H. flagella (Paraguay, Mbocayaty, Arroyo Gervasio); H. hintoni (Brazil, Porto Velho); H. kellymilleri (Venezuela, just S. of Communidad Porvenir); H. lilianae (Argentina, Punta Lara); H. loripes (Venezuela, Stream along Rio Sipapo, S. Communidad Cano Gato); H. manabica (Ecuador, 38 km E. of Portoviejo); H. mauriciogarciai (Venezuela, Perija National Park, Tukuko, Rio Manantial); H. mintrita (Venezuela, stream nr. San Antonio); H. multiloba (Bolivia, 40 km E. San Borja, Estacion Biologica Beni, Palm Camp at Rio Curiraba); H. multispina (Peru, Quita Calzone, at km 164); H. nanoscintilla (Brazil, Cuiabá, 66 km E Serra, MT); H. neblina (Venezuela, Cerro de la Neblina); H. novacula (Peru, Buenos Aires, at km 132); H. pantanalensis (Brazil, Rio Bento Gomes (Pantanal); H. Quelle, Quellbach, Campo Allegre, II); H. peckorum (Argentina, 17 km N La Caldera, Alto de la Sierra); H. pedroaguilerai (Ecuador, Puyo, Santa Clara, Rio Llaudio Chico); H. propria (Ecuador, Paquisha, 20 km SE); H. punctilata (Brazil, Est. [Estirao] Do Ecuador); H. reverberata (Venezuela, Puerto Ayacucho (40 km S.), at Tobogan); H. scintillamima (Peru, Celendin area); H. scintillapicta (Suriname, Sipaliwini District, Camp 3, Wehepai; 2010 CI-RAP Survey); H. scintillarca (Peru, Celendin area); H. shorti (Venezuela, Perija National Park, Tukuko, Rio Manantial); H. spatula (Venezuela, NW Humocaro Bajo); H. steineri (Bolivia, 40 km E. San Borja, Estacion Biologica Beni, Palm Camp at Rio Curiraba); H. stellula (Ecuador, Santo Domingo, 79.6 km E); H. takutu (Guyana, Takutu Mountains); H. tobogan (Venezuela, Puerto Ayacucho (40 km S), at Tobogan); H. tridigita (Peru, Celendin area); H. umbolenta (Paraguay, Rio Tebicuarymi); H. unita (Brazil, Rio Bento Gomes, Pantanal); H. venezuela (Venezuela, Los Pijiguaos); H. xingu (Brazil, Rio Xingu Camp, Altamira, ca 60 km S).

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