Wyniki wyszukiwania - AGRO

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Diskyphogyne [ Spiranthinae ], a new orchid genus from South America

100%

Szlachetko D. L., Tamayo R. G.

Fragmenta Floristica et Geobotanica

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1996

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tom 41

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nr 1

2

Allozyme genetic distances and evolutionary relationships in marsupials of North and South America

75%

Barrantes G. E., Daleffe L.

Acta Theriologica

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1999

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tom 44

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nr 3

AUozyme genetic distances and variability were studied by horizontal starch gel electrophoresis in 6 species of marsupials from North and South America representing 4 different genera. Twenty-one presumptive loci were assessed in a total of 151 specimens. Only 1 of 21 loci was found to be monomorphic in the whole sample. Phenetic and cladistic interspecific analysis coincided in rendering two sharply differentiated subgroups: one comprising species of the genus Didelphis Linnaeus, 1758 CD. marsupialis Linnaeus, 1758, D. virginiana Kerr, 1792 and D. albiventris Lund, 1840), and the other comprising Monodelphis dimidiata fWagner, 1847}, Lestodelphys halli (Thomas, 1921) and Lutreolina crassicaudata (Desmarest, 1804). No relationships between the bradytelic condition, the karyotype stability of this group, and genetic variability were found. On the other hand, the existence of species with brief life span such as Lestodelphys halli and Monodelphis dimidiata (Marmosini tribe) and species with long life span (Didelphini tribe) allowed us to test the hypothesis which correlates generation-time with genetic variability. We conclude that a general explanation for genetic variability must involve more than just generation-time,

3

The burrow of Dasypus hybridus [Cingulata: Dasypodidae]

75%

Gonzales E. M., Soutullo A., Altuna C. A.

Acta Theriologica

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2001

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tom 46

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nr 1

Dasypus hybridus (Desmarest, 1804) inhabits open fields in southern South America. Burrows of D. hybridus were cylindrical with a conical end. They had an entrance and a single tunnel without branches. Three locations of the burrows in the terrain were detected: in banks of dried waterways, near rocks, and in open field. The orientation of 29 burrow mouths was not random and, although they did not point to any cardinal point, in particular there was a strong tendency to avoid the south quadrant. In a sample area of 90 x 140 m, burrow mouths were arranged in a random spatial pattern with a density of 25.4 burrows per ha. Great variation in burrow length was found (118.8 + 105.69 cm, CV = 89.0%). Tunnels may be used as refuges and/or for thermoregulation. The orientation of burrow mouths can also be related to thermoregulation as tunnels are covered from dominant winds, and, for many hours every day, the temperature at the mouths can be influenced by insolation. The possible existence of shelter-burrows and resting-burrows is discussed.

4

A new species of Palmorchis [Orchidaceae] from Colombia

75%

Veyret Y., Szlachetko D. L.

Fragmenta Floristica et Geobotanica

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1995

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tom 40

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nr 2

5

New combination in Helianthopsis [Asteraceae, Heliantheae]

75%

Sala C. A., Echarte A. M.

Fragmenta Floristica et Geobotanica

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1996

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tom 41

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nr 2

6

Molecular events during chromosomal divergence of the South American rodent Graomys griseoflavus

75%

Zambelli A., Vidal-Rioja L.

Acta Theriologica

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1999

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tom 44

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nr 4

Graomys griseoflavus (Waterhouse, 1837) is a South American phyllotine rodent having an autosomal polymorphism produced by a sequence of llobertsonian fusions. The chromosomal divergence was correlated with the molecular organization of two satellite DNA families (EG250 and Hpa3.2) and the second internal transcribed spacer (ITS11) of ribosomal DNA, These studies were performed by Southern hybridization on all G. griseoflavus karyomorphs and other closely related cricetids. When Graomys karyomorphs were compared, interkaryomorphic differences were found at the methyl- ation pattern level of EG250 satellite and the molecular organization of Hpa3.2 satellite and ITSII. The findings support the hypothesis that Graomys griseoflavus karyomorphs are evolving separately, probably driving a chromosomal speciation process between 2 n = 42-41 and 2n = 38-34 individuals.

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Carved teeth and strange jaws: how glyptodonts masticated

75%

Farina R. A., Vizcaino S. F.

Acta Palaeontologica Polonica

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2001

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tom 46

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nr 2

In this paper, the highly peculiar masticatory apparatus of glyptodonts is studied. The general morphology of the skull is analysed using a morphometric procedure, the Resistant Fit Theta Rho Analysis, which allows comparison among different biological forms. Here, a large terminal form, the late Pleistocene genus Glyptodon, is compared with the smaller primitive Miocene genus Propalaehoplophorus, and with the generalised Recent armadillo Chaetophractus. The masticatory musculature of glyptodonts is reconstructed. Their tooth form and wear facets, as well as their mandibular symphysis and jaw joint, are analysed. A model of jaw movement is constructed based on these analyses. It is demonstrated that the masticatory apparatus of glyptodonts had undergone a telescoping process, which was already underway in the most ancient forms whose skull is known. This process created problems in regard to the way stresses produced by mastication were absorbed by the mandible, and therefore it might be regarded as non-adaptive. Some functional explanatory hypotheses are discussed, such as a requirement of keeping the moment of the weight of the cranium small enough to be counterbalanced by the neck muscles, or fitting the head into the armour.

8

The taxonomic status of two varieties of Ditrichum [Musci, Ditrichaceae] from Southern South America

75%

Ochyra R.

Fragmenta Floristica et Geobotanica

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1999

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tom 44

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nr 2

9

Miscellaneous notes on the genus Sphagnum [Musci, Sphagnaceae]. 7

75%

Crum H.

Fragmenta Floristica et Geobotanica

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1995

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tom 40

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nr 1

10

A new genus and species of the Neotropical Eupariini [Coleoptera: Scarabaeidae: Aphodiinae]

75%

Stebnicka Z.

Acta Zoologica Cracoviensia

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2003

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tom 46

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nr 4

Taenia guyanaensis, new genus, new species of Eupariini from South America is described and illustrated, notes on its affinities are provided.

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Fur mites of the family Listrophoridae (Acariformes: Sarcoptoidea) associated with South American sigmodontine rodents (Cricetidae: Sigmodontinae)

63%

Sikora B., Bochkov A. V.

Acta Parasitologica

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2012

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tom 57

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nr 4

Six species of 3 genera belonging to the fur mite family Listrophoridae were recorded on skins of South American rodents of the cricetid subfamily Sigmodontinae housed in the Bavarian State Collection of Zoology (Munich, Germany). Among them, Amlistrophorus geoxus sp. nov. from Geoxus valdivianus from Chile is described as a new for science, and males of Prolistrophorus amazonicus amazonicus Fain, 1971 are recorded for the first time. The full generic status for the subgenus Amlistrophorus of the genus Prolistrophorus proposed by Fain et al. (1996) is not supported, and Prolistrophorus musculinus Fain, 1973 stat. nov. (formerly a subspecies of P. amazonicus) from Mus musculus (Rodentia: Muridae) from Suriname is raised to species status. New hosts are recorded for the following species: Prolistrophorus argentinus (Hirst, 1921) from Holochilus brasiliensis and H. chacarius from Argentina, P. amazonicus from Calomys callosus from Argentina and Bolivia, C. laucha and C. musculinus from Argentina, P. akodon Fain and Lukoschus, 1982 from Akodon montensis from Argentina, P. nectomys Fain, 1971 from Nectomys palmipes from Peru and Melanomys caliginosus from Panama, and Sclerolistrophorus oxymycteris Fain, 1976 from Oryzomys laticeps from Brazil.

12

Isospora borbai n. sp. (Chromista: Apicomplexa: Eimeriidae) from gnateaters Conopophaga spp. (Passeriformes: Tyranni: Conopophagidae) in South America

63%

da Silva-Carvalho L., Genovez-Oliveira J. L., de Souza Oliveira M., Rodrigues M. B., Abreu S. T., Ortuzar-Ferreira C. N., Franco H. A., Thode-Filho S., de Oliveira A. A., Moreira de Lima V., Ferreira I., Berto B. P.

Acta Parasitologica

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2019

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tom 64

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nr 3

13

New records of South American Cassidinae (Coleoptera: Chrysomelidae)

63%

Simoes M. V. P., Monne M. L.

Genus. International Journal of Invertebrate Taxonomy

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2008

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tom 19

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nr 4

14

Morphological-behavioral adaptations of two benthic invertebrate species to face strong bed hydrodynamic forces in a large South-American river

63%

Blettler M. C. M., Eberle E., Bullo J., de Drago I. E., Amsler M. L.

International Journal of Ecohydrology and Hydrobiology

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2014

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tom 14

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nr 2

15

Icmadophila aversa and Piccolia conspersa, two lichen species new to Bolivia

63%

Wilk K.

Polish Botanical Journal

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2010

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tom 55

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nr 1

217-221

16

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

63%

Szlachetko D. L., Mytnik-Ejsmont J.

Biodiversity: Research and Conservation

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2010

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tom 19

17

A new species of Picomicrolycus (Coleoptera: Lycidae), first record from South America and a key to species

63%

Nascimento E. A., Bocakova M.

Annales Zoologici

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2012

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tom 62

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nr 2

A new species Picomicrolycus ireneae sp. nov. from Brazil is described and Calleros pilosus Pic, 1934 is transferred to Picomicrolycus, recording this genus for the first time from South America. Diagnostic characters are illustrated and a key to known Picomicrolycus species is given.

18

On the presence of a pustulated temnospondyl in the Lower Triassic of southern Brazil

63%

Dias-da-Silva S., Ramos Ilha A. L.

Acta Palaeontologica Polonica

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2009

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tom 54

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nr 4

The fossil record of temnospondyls in South America has been greatly expanded in the last 10 years, increasing their overall significance. They occur in Argentina, Brazil, and Uruguay, and range from the Guadalupian to the Late Triassic. The Early Triassic temnospondyl record in southern Brazil is mainly composed of fragmentary specimens, usually represented by dermal skull bones from the Sanga do Cabral Formation. Some of these fragments were tentatively referred to Lydekkerinidae and Rhytidosteidae based on their characteristic ridge−grooved “spider−web” pattern of ornamentation. In this contribution we report, for the first time, a temnospondyl skull fragment with pustulated sculpturing pattern, which is tentatively ascribed to Plagiosauridae. This new record could indicate the presence of a new temnospondyl taxon for the Lower Triassic of South America.

19

Notes on some South American species of Scirtes Illiger, 1807 (Coleoptera: Scirtidae)

63%

Libonatti M. L.

Annales Zoologici

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2017

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tom 67

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nr 2

The species of the genus Scirtes Illiger, 1807 (Coleoptera: Scirtidae) from Argentina are revised. Seven species are recognized: S. adustus Boheman, 1858, S. caraguata sp. nov., S. dentatus sp. nov., S. diversenotatus Pic, 1930, S. gallus sp. nov., S. helicoidalis sp. nov., and S. rufobinotatus Pic, 1922. S. postimpressus Pic, 1922 is proposed as a junior synonym of Scirtes rufobinotatus. Illustrations of dorsal habitus, male and female genitalia, and other diagnostic features are provided along with a key to the species.

20

Santiago de Chile - the beautiful and modern capital of South America

63%

Borowski T.

The Institute of Biopaleogeography named under Charles R. Darwin

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2021

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tom 02

This report introduces the capital of Chile –Santiago de Chile, South America. A beautiful and modern city are the main features of this capital. Cheap hotels, wonderful restaurants, tasty food and cheap in bars. Full culture and high level of service to tourists. Main opinion: one can only envy such a capital. The trip took place in July 2005

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