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New insights into the early diversification of the Ostracoda: Tremadocian ostracods from the Cordillera Oriental, Argentina

100%
Salas M. J., Vaccari N. E.
Acta Palaeontologica Polonica
|
2012
|
tom 57
|
nr 1
New species of ostracods from the Tremadocian in the northwest region of Argentina are described. These are among the earliest well−documented records of ostracods, which shed new light onto the early diversification of the group. The described fauna consists of seven species, five of which are new: Saltite uchuy sp. nov., Saltite kuraq sp. nov., Conchoprimitia? iglesiasi sp. nov., Orechina violetae sp. nov., and Orechina catalinae sp. nov. The fauna consists primarily of soanellids, a non−dimorphic family of palaeocopids, and of binodicopids. One factor leading to diversification of the group in this region may have been the complex configuration of the northwest basin, which had a restricted pattern of circulation. The distribution of the first ostracods is largely restricted to Gondwana and peri−Gondwana regions. Accordingly, it is possible to envision that the origin or at least an important radiation of the group was centred in this region. Both the Soanellidae and the genus Orechina would have originated in Gondwana and would have become widespread later during the Middle Ordovician. The Tremadocian fauna located in Argentina show significant affinities with fauna located in the warm−water setting of the east Gondwana, mainly in Australia and China.
2

Tradycyjne rolnictwo andyjskie w dorzeczu Checras

100%
Krzanowska R., Krzanowski A.
Afryka, Azja, Ameryka Łacińska
|
1992
|
tom 69
67-82
3

Stellilabium kukwae (Telipogoneae, Orchidaceae), a new species from Bolivia

84%
Szlachetko D. L., Mytnik-Ejsmont J.
Biodiversity: Research and Conservation
|
2010
|
tom 19
4

Orthocomotis DOGNIN, 1905 (Lepidoptera: Tortricidae) from Ecuador

84%
Razowski J., Pelz V., Wojtusiak J.
Acta Zoologica Cracoviensia. Ser.B Invertebrata
|
2007
|
tom 50B
|
nr 2
5

Diet of the cloud forest shrew Cryptotis meridensis [Insectivora: Soricidae] in the Venezuelan Andes

84%
Diaz d. P. A., De Ascencao A. A.
Acta Theriologica
|
2000
|
tom 45
|
nr 1
The diet of Cryptotis meridensis Thomas, 1898 was studied by analysing stomach contents of 55 shrews collected by pitfall trapping in the cloud forest of Monte Zerpa, Mérida, Venezuela. The aims of the study were to describe the diet of this unknown tropical species and test the prediction that this species should be more of a subterranean feeder according to its morphological adaptations. The diet was composed of 35 different prey taita distributed in six invertebrate classes (Gastropoda, Annelida, Arachnida, Crustacea, Myriapoda and Insecta). The most important components of the diet were hypogeal invertebrates: Oligochaeta, Gastropoda, Theraposidae, Isopoda, Scolopendridae, Phasmatidae, Blatiidae, Lepidoptera larvae and pupae, Diptera larvae, adult Carabidae, Staphilinidae, Elateridae larvae, Passalidae and Scarabaeidae larvae. Their contribution was 69.44% of the overall diet composition. Oligochaeta were the most frequent prey. Ephigeal invertebrates (Lycosidae, Acrididae, Gryllidae, adult Scarabaeidae and Lycosidae) accounted for only 27,24%. The preferences for soil invertebrates found in this study confirmed our prediction that C. meridensis uses mostly a subterranean foraging mode in accord with its morphological adaptations similar to other shrews in temperate habitats.
6

Feeding habits of guanacos Lama guanicoe in the high Andes of North-Central Chile

84%
Cortes A., Miranda E., Rau J. R., Jimenez J. E.
Acta Theriologica
|
2003
|
tom 48
|
nr 2
The guanaco Lama guanicoe Muller, 1776 has a wide distribution along the Andes and Patagonia. We studied the feeding behaviour of a guanaco population that lives over 4100 m altitude in the Andes of north-central Chile. By contrasting the diet of guanacos during a dry year with that of a wet year and comparing it with the plant availabilities in the field, we tested the hypothesis that the guanaco is a generalist herbivore. We predicted that under such extreme habitat conditions guanacos should consume whatever plant species are available in the environment, especially in a dry year, when vegetation is scarcer. In addition, we compared its diet at three different age classes. We estimated the diet through the microhistological analysis of plant remains found in guanaco pellets collected during January of 1997 (ie after a dry year) and 1998 (ie after a wet year; 41 vs 495 mm, respectively). Then, we computed dietary preferences, food niche-breadth, and food-niche overlap between years and among age classes. Vegetation cover and plant species richness were higher during the wet than during the dry year. The most common plants in the environment were perennial graminoids and legumes. Contrary to our prediction, the guanaco preferred a few plant species, showing a relatively narrow diet breadth that changed little between years differing in plant abundances. The diet proportions differed among the three age classes, however. Our data indicate that at least in this high-elevation population, guanacos are selective and non-opportunistic herbivores. This specialized feeding behaviour is puzzling given the energetic demands of living in a harsh environment with low availabilities of resources. The hypothesis that this is due to the lower palatability of the plants not eaten, remains to be tested.
7

The genus Pons Johnson, 1992 [Lepidoptera: Lycaenidae: Eumaeini]

84%
Balint Z., Wojtusiak J.
Genus. International Journal of Invertebrate Taxonomy
|
2001
|
tom 12
|
nr 3
8

Diel vertical migration of zooplankton in tropical high mountain lakes [Andes, Bolivia]

84%
Aguilera X., Crespo G., Declerck S., De Meester L.
Polish Journal of Ecology
|
2006
|
tom 54
|
nr 3
Diel Vertical Migration (DVM) is a widespread behavior in zooplankton. Although considered to be a predator avoidance behavior in most cases, DVM is also influenced by the distribution of food, competitive interactions and UV (Ultraviolet) radiation. In this paper we report the day and nighttime vertical distribution of the common zooplankton species in nine high altitude tropical Andean lakes to obtain an idea of the range in vertical distribution patterns in Andean lakes. The lakes are situated between 4000 and 4545 m a.s.l. The maximum depth of the lakes varied from 5 to 24 m, and the area varied between 0.6 and 20.75 ha. Daphnia pulex (Leydig 1860) showed tendencies for a normal vertical migration behavior in all lakes sampled irrespective of whether the lakes contained fish. The population resided deeper in the water column during the daytime than during the night, although migration amplitude differed strongly among lakes. In many lakes, there was an important daytime “deficit” in the number of individuals caught, suggesting that the animals stay close to the bottom of the lake during the day. It suggests that UV radiation is the more likely factor influencing the DVM of Daphnia. Copepods and rotifers showed reverse DVM in some lakes. Our data suggest that the DVM behavior of copepods and rotifers in the studied lakes may in part be determined by the avoidance of competition from Daphnia pulex.
9

Systematics, bionomics and zoogeography of high Andean pedaliodines; Part 5: Revisional notes on Pedaliodes chrysotaenia with the description of a related species (Lepidoptera: Nymphalidae: Satyrinae)

67%
Pyrcz T. W., Viloria A. L., Boyer P.
Genus. International Journal of Invertebrate Taxonomy
|
2008
|
tom 19
|
nr 3
10

Systematics, bionomics and zoogeography of high Andean pedaliodines; Part 9: Notes on Pedaliodes pammenes (Hewitson) and related species with the descriptions of nine new taxa (Lepidoptera: Nymphalidae: Satyrinae)

67%
Pyrcz T. W., Viloria A. L., Boyer P., Lamas G.
Genus. International Journal of Invertebrate Taxonomy
|
2008
|
tom 19
|
nr 3
11

Systematics, bionomics and zoogeography of high Andean pedaliodines; Part 8: Pedaliodes niveonota Butler and new related species from Central Peru (Lepidoptera: Nymphalidae: Satyrinae)

67%
Pyrcz T. W., Viloria A. L., Boyer P., Lamas G.
Genus. International Journal of Invertebrate Taxonomy
|
2008
|
tom 19
|
nr 3
12

Hynhamia RAZOWSKI, Dimorphopalpa BROWN, and Ulvipinara gen.n., three euliine genera from Ecuador (Lepidoptera: Tortricidae)

67%
Razowski J., Pelz V.
Polish Journal of Entomology
|
2007
|
tom 76
|
nr 1
Two already known euliine genera are found in Ecuador and 8 species are described as new (Hynhamia lasgralariae sp. n., H. obscurana sp. n., H. decora sp. n., H. conceptionana sp. n., H. nigropunctana sp. n., H. micruncus sp. n., Dimorphopalpa rutruncus sp. n., D. lyonsae sp. n.). One genus (Ulvipinara gen.n.) and its species (U. pulvinaria sp. n.) are newly described.
13

Systematics, ecology and zoogeography of high Andean pedaliodines. Part 1: Pedaliodes spina Weymer (Lepidoptera, Nymphalidae, Satyrinae)

67%
Pyrcz T. W.
Genus. International Journal of Invertebrate Taxonomy
|
2006
|
tom 17
|
nr 2
14

Systematics, bionomics and zoogeography of high Andean pedaliodines; Part 7: A sister species of Pedaliodes paneis (Hewitson) from Central Peru (Lepidoptera: Nymphalidae: Satyrinae)

67%
Pyrcz T. W., Viloria A. L., Lamas G.
Genus. International Journal of Invertebrate Taxonomy
|
2008
|
tom 19
|
nr 3
15

Systematics, bionomics and zoogeography of high Andean pedaliodines; Part 6: Pedaliodes demathani Pyrcz – a widely polytypic species from Peru and Bolivia (Lepidoptera: Nymphalidae: Satyrinae)

67%
Pyrcz T. W., Viloria A. L., Boyer P., Lamas G.
Genus. International Journal of Invertebrate Taxonomy
|
2008
|
tom 19
|
nr 3
16

Systematics, bionomics and zoogeography of high Andean pedaliodines; Part 10: Revisional notes on Pedaliodes tyro Thieme with the description of new allied taxa from central and southern Peru (Lepidoptera: Nymphalidae: Satyrinae)

67%
Pyrcz T. W., Viloria A. L., Boyer P., Lamas G.
Genus. International Journal of Invertebrate Taxonomy
|
2008
|
tom 19
|
nr 3
17

Revisional notes on the genera Corderopedaliodes Forster and Physcopedaliodes Forster based on adult morphology with the descriptions of new taxa (Nymphalidae: Satyrinae)

67%
Pyrcz T. W., Warren-Gash H., Zubek A.
Genus. International Journal of Invertebrate Taxonomy
|
2013
|
tom 24
|
nr 1
18

A new Andean element in the lepidopterous fauna of the Guiana Shield: the day-flying genus Erateina Doubleday, with the description of two new species from Roraima, Tramen and Auyan Tepui (Geometridae: Larentiinae)

67%
Pyrcz T. W., Stachowicz L., Garlacz R.
Genus. International Journal of Invertebrate Taxonomy
|
2013
|
tom 24
|
nr 3-4
19

Altitudinal alteration of the morphological systems in the Rio Checras Basin of the Peruvian Andes

67%
Kaszowski L.
Geographia Polonica
|
1992
|
tom 60
20

Richness and distribution of zooplanktonic crustacean species in Chilean Andes Mountains and Southern Patagonia shallow ponds

67%
De l. R. P.
Polish Journal of Environmental Studies
|
2005
|
tom 14
|
nr 6
The lacustrine ecosystems located in the Andes Mountains in the Atacama desert and in the Chilean Southern Patagonia are characterized by their high levels of salinity, the zooplankton in these sites are characterized by a marked predominance of calanoid copepods at low or intermediate salinity levels, and at high salinity levels pratically only the genus Artemia is dominant. Data on levels of salinity and zooplanktonic composition in both regions were collected in field work and from published data. Statistical analysis showed a marked inverse association between salinity and species richness that was notoriously significant for Andes Mountains (R = -0.8193; p = 0.0037), whereas for Southern Patagonia there were observed weakly similar results, caused by lack of data between 5.0-15.0 g/l. Both zones observed calanoid dominance at low and moderate salinity levels between 3-51 g/l and 1-16 g/l for Andes Mountains and Southern Patagonia, respectively, and Artemia genus was dominant at salinities above 100 g/l for Andes Mountains and 20 g/l for Southern Patagonia. Ecological and biogeographic effects, and comparison with zooplankton assemblages of Australian saline lakes are discussed in the present study.
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