ISSN: 2310-2799
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546,196 artículos
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Año:
2020
ISSN:
1852-6098
Laurent, R. F.
Fundación Miguel Lillo
Resumen
Reflections on “Les problémes de l’espéce dans le Régne animal” directed by Charles Bocquet, Jean Génermont and Maxime Lamotte.
It is a pleasure to comment a very nice French publication on the species problem in the animal Kingdom. Two volumes appeared and a third is heralded. The contain seventeen papers, each on a different group. Most are excellent an none is bad. The main conclusion are: the frequence of cryptic species, the difficulties of application of the biological species concept between allopatric populations, the probability of quite an array of speciation mechanisms, although the allopatric model of Mayr still apppears to be by far the most common. As a corollary, it can be seen that the biological species concept is indeed non-operational as claimed by Sikal and Crovello (1970). However, it does no matter. Systematists are not free to disregard the reality, pretexting its forbidding complexity. So much the worse for them, buy they have to face the challenge.
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Año:
2020
ISSN:
1852-6098
Paggi, J. C.; Villagra de Gamundi, A.
Fundación Miguel Lillo
Resumen
The presence of Pleuroxus caca Harding in mountain ponds is reported. This species is new for Argentine Cladoceran fauna. Females cimens of this are redescribed, including the detailed morphology of valves, head shield trunk limbs. The male hither to unknouwn is also described.
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Año:
2020
ISSN:
1852-6098
Barrera, Mauricio; Turk, Sonia Z.
Fundación Miguel Lillo
Resumen
Some decades ago, Schistocerca cancellata paranensis (Burm.) showed all its phases apparently well defined. Nowadays, it does not attain the gregarious phase, probably because of the strict control of its populations; according to the prevailing conditions, it is found only as solitary or congregans. Five years of observations in the field and some tests and succesive rearing in laboratory permit the previous statement, and give data on the bionomics of the species.
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Año:
2020
ISSN:
1852-6098
de Santis, Luis; Armesto, Griselda A.
Fundación Miguel Lillo
Resumen
This paper deals with the coleophorid Coleophora haywardi Pastrana, 1963, from Salta province (Argentina). This lepidopterous could be responsible of total defoliation of ?quebracho colorado? (Schinopsis sp.) trees.
The species of parasitoid hymenopterous reared from the pest are: the braconids Agathis haywardi De Santis, 1963 and Chelonus (Microchelonus) sp. and the chalcidoids Spilochalcis saltensis De Santis, 1963, Zatropis golbachi De Santis, new species and Arachnophaga sp.
The types of the new species and all the documentary material are deposited in Museo de La Plata and Fundación Miguel Lillo.
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Año:
2020
ISSN:
1852-6098
Scrocchi, Gustavo J.
Fundación Miguel Lillo
Resumen
Data about the distribution of the subespecies in Argentina are given, based on specimens of the Fundacion Miguel Lillo collection. Also the variation in the squamation and color pattern is described in the specimens studied, compared with the data given by Duellman, the author of this subespecies.
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Año:
2020
ISSN:
1852-6098
Golbach, R.
Fundación Miguel Lillo
Resumen
All papers related with species of the genus Cardiorhinus Esch. 1829 are enumerated. A key for all known species is given. Cardiorhinus schwarzi, new species from Brasil, is included. C. bilineatus (F.) is the type of the genus (Chenu 1858: 29), and not C. seminiger Esch. 1829 proposed by Hyslop (1921:633); C. maculicollis Cand. 1863, C. vulneratus (Germ.) 1824, C. seminiger Esch. 1829 and C. plebejus Cand. 1863 are mentioned for the first time for Paraguay. C. schwarzi n. sp., C. antennalis Germ., C. vulneratus (Germ.), C. plagiatus var. b (Germ.), C. laetipennis Cand., C. simplex Cand., C. divaricatus Schw., and C. maculicollis Cand. are illustrated.
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Año:
2020
ISSN:
1852-6098
Granara de Willink, Cristina
Fundación Miguel Lillo
Resumen
In this paper, two new species (crassus and similis) of the genus Phenacoccus Cockerell are described, and tucumanus, the specific name of a third one, is given; all were found in the province of Tucumán.
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Año:
2020
ISSN:
1852-6098
Golbach, R.
Fundación Miguel Lillo
Resumen
A key of the genus Tomicephalus. Latr. is provided.
Tomicephalus uhligi n. sp. from Mexico is described and illustrated.
Tomicephalus sanguinicollis Latr. is new for Perú and Bolivia.
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Año:
2020
ISSN:
1852-6098
Lavilla, E. O.
Fundación Miguel Lillo
Resumen
The tadpole of Phyllomedusa pailona Shreve, 1959, is described from a group of specimens collected in Aguas Blancas, Orán, Salta (Argentina). Phyllomedusa pailona larva is compared with tadpoles of other species of the sames genus and related genera.
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Año:
2020
ISSN:
1852-6098
Muruaga de L'Argentier, Susana; Dipierri, José Edgardo
Fundación Miguel Lillo
Resumen
Meiotic chromosomes of 20 males ot Scutobruchus cassiovorus and 20 males of Merobruchus bicoloripes were investigated in order to determine their chromosomal constitution. The karyotypes found were: 2n = 18, n = 8Xyp for Scutobruchus cessiovorus and 2n = 24, n = 11Xyp, for Merobruchus bicoloripes. The numerical and structural differences between them and other species of Bruchinae are analyzed.
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