Luis E Acosta | Universidad Nacional de Córdoba (original) (raw)

Papers by Luis E Acosta

Bulletin of Zoological Nomenclature, 2003

... Bucheri, W. 1963. Escorpiões e escorpionismo no Brasil. XI. ... Pp. 47-50 in Lesson, RP, Voya... more ... Bucheri, W. 1963. Escorpiões e escorpionismo no Brasil. XI. ... Pp. 47-50 in Lesson, RP, Voyage autour du monde, exécuté par ordre du Roi, sur la corvette de sa Majesté, La Coquille, pendant les années 1822, 1823, 1824 et 1825, par LI Duperrey, Zoologie, vol. 2, pt. ...

This paper is the first report about fluorescence for the order Opiliones. The observations were ... more This paper is the first report about fluorescence for the order Opiliones. The observations were made under U. V. light on living and preserved specimens of two common Pachylinae from Córdoba (Argentina): Sphaleropachylus fulvigranulatus (MELLO-LEITAO, 1930) and S. butleri (THORELL, 1877). By making use of this property, the U.V. resource may become a useful tool in field studies on Opiliones.

This species is redescribed and its diagnosis is revised and updated. It is established that U. b... more This species is redescribed and its diagnosis is revised and updated. It is established that U. brachycentrus (Thorell, 1876) and U. iheringi Pocock, 1893 are its nearest relatives; they differ from U. achalensis in the chromatic diagram, the ventral granulation of metasomal segment III, the number of pectinal teeth, the shape of telson and the hemispermatophore.

Redescription of Neopucroliella mesembrina Ringuelet, 1961 nov. stat. - (Opiliones, Gonyleptidae,... more Redescription of Neopucroliella mesembrina Ringuelet, 1961 nov. stat. - (Opiliones, Gonyleptidae, Pachylinae) . Neopucroliella mesembrina Ringuelet, 1961 is adequately redescribed and illustrated; this species, formerly regarded as a subspecies of N. borgmeieri (Mello-Leitao, 19231, is hereby raised to the specific rank. A distribution map, as well as some comments on the phylogenetic relationships in the genus Neopucroliella and related genera are also included.

The genus Cercophonius Peters is revised, and generic and specific diagnosis are updated. By mean... more The genus Cercophonius Peters is revised, and generic and specific diagnosis are updated. By means of the study of specimens from different localities and the type material, four species (C. michaelseni Kraepelin, C. sulcatus Kraepelin, C. granulosus Kraepelin and C. kershawi Glauert), formerly synonymyzed with the type species C. squama (Gervais), are hereby reinstated as valid; a sixth, new species, C. queenslandae is described. The diagnostic characters used at specific level are: development of ventral carinae in caudal segments I to IV and sternite V; morphology of the hemispermatophore, and pigmentary patterns of tergites and metasoma; other characters, such as the number of pectinal teeth, total lenght and the shape of telson show some differences useful to the determination, although not permiting a clear separation of the species. A key for the species, as well as a discussion on the taxonomic relationships of Cercophonius with Urophonius Pocock and Phoniocercus Pocock (its...

In this paper Parabalta sicaria Roewer, 1925 and P. borellii Roewer, 1925 -the last regarded up t... more In this paper Parabalta sicaria Roewer, 1925 and P. borellii Roewer, 1925 -the last regarded up to now as "species inquirendaV- are redescribed and illustrated; lectotypes for each species are hereby designated, and in both cases the type localities are accurately determined. A map of the known localities is added.

Bothriurus chacoensis, a new species belonging to the bonariensis group, is described and illustr... more Bothriurus chacoensis, a new species belonging to the bonariensis group, is described and illustrated. In comparison to the typical form, B. bonariensis (C.L. Koch), B. chacoensis is darker and smaller, and shows a lower number of pectinal teeth. The sharpest differences are in the hemispermatophore: (1) the frontal ridge extends from 57,5 to 62% of the lamella lenght (46-55% in B. bonariensis ), (2) the rigth basal lobe has an apical filament,which is absent on the left one (in B. bonariensis both lobes lack a filament). Bothriurus chacoensis inhabits the Chacoan biogeographical province, especially its occidental district, of Argentina, Paraguay and southern Bolivia.

The stridulation in a Bothriurid scorpion, Timogenes elegans (Mello-Leitao), is first reported. T... more The stridulation in a Bothriurid scorpion, Timogenes elegans (Mello-Leitao), is first reported. The stridulatory apparatus consists of groups of granules, placed on the mesosomal pretergites III to VI, which are rubbed by the caudal edge of the previous tergite, while the animal curves the body as a defensive behaviour. The sonogram of the stridulation sounds produced by this species, as well as a brief account of what is known on the subject in the order Scorpiones, are added. The possible role of sound in T. elegans is discussed.

New localities for Argentinian scorpions (Arachnida, Scorpiones). New records of seven scorpion s... more New localities for Argentinian scorpions (Arachnida, Scorpiones). New records of seven scorpion species from central-west Argentina are reported. The known ranges of Bothriurus noa Maury, B. prospicuus Mello-Leitao, Brachistosternus ferrugineus (Thorell), B.pentheri Mello-Leitao, Vachonia sp., Tityus confluens Borelli, and Zabius birabeni Mello-Leitao are either extended or their actual limits more precisely determined.

The results of scorpiofaunal surveys, carried out in eight westem chaco areas belonging to the Ll... more The results of scorpiofaunal surveys, carried out in eight westem chaco areas belonging to the Llanos district (Argentina), are given. Nine scorpion species have been recorded in the whole district. The specific composition in each site was quantified, and their similarities and differences are commented; additionally, a chaco area outside of the Llanos was also sampled for comparisons. One of the study sites (Chancaní, in westem province of Córdoba) bears the highest number of sympatric scorpions so far recorded in an Argentinían locality (nine species). KEY-WORDS.- Scorpiones, Diversity, Chaco, Llanos district.

Bothriurus olaen, a new scorpion species from the Sierras de Cordoba and San Luis in Central Arge... more Bothriurus olaen, a new scorpion species from the Sierras de Cordoba and San Luis in Central Argentina, is described. It belongs to the burmeisteri species-group, and differs from the so far only named species in the group, B. burmeisteri Kraepelin, in bearing less developed lateroventral and submedian ventral keels on caudal segment V. Another species, yet unnamed, from Northwestern Argentina and Southern Bolivia, is determined to be the nearest relative of B. olaen n. sp.; these forms are kept as separate entities because of subtle morphological features, and their very different patterns of distribution.

The order Scorpiones is represented in Argentina by two families: the Gondwanian Bothriuridae are... more The order Scorpiones is represented in Argentina by two families: the Gondwanian Bothriuridae are the most speciose and with wider range, whereas the cosmopolitan Buthidae are poorly represented in the country. A species checklist and an identification key for supraspecific entities are provided, to update those induded in earlier monographs and checklists. Nine genera and 41 nominal valid species are listed, as well as nine binomens with unclear status, and about 10 forms probably still unnamed, belonging mainly to Brachistosternus (Leptosternus), Bothriurus and Urophonius. Two genera and 24 species have not been found yet in other countries, and four species are small area endemics. Biogeographic patterns allow to the recognition of five areas belonging to a "subtropical" ancestry (Chacoan, Yungas, Mesopotamic, Misiones, and Pampasic areas), and four related to an "Andean-Patagonian" pattern (high-Andean, Palagonian, Subandean, and Peripampasic areas). Some fea...

Senckenbergiana biologica

An updated catalogue of the type material of the Pachylinae species described by ROEWER is presen... more An updated catalogue of the type material of the Pachylinae species described by ROEWER is presented. A total of 111 species, included by ROEWER in the subfamily, as well as 3 species originally in Gonyleptinae, are listed in their original combinations (genus transfers and synonymies are pointed out). Informations on the labels, number and sex of specimens, and data in the catalogues are provided. Comments on the nomenclatural status of the material are added.

Journal of Arachnology

The nominal genus Bosqia Canals 1933 is determined to be junior subjective synonym of Pachyloides... more The nominal genus Bosqia Canals 1933 is determined to be junior subjective synonym of Pachyloides Holmberg 1878. This results in the new combination Pachyloides tucumanus (Canals 1933) for the only species hitherto assigned to Bosqia, and in a secondary homonymy with Pachyloides tucumanus Canals 1943. For the latter, the new name Pachyloides yungarum is proposed. The article provides a redescription of Pachyloides tucumanus (Canals 1933) new combination, including the male external and genital morphology (previously unknown). New records of the species are also reported.

The Argentinean opiliofauna comprises about 115 species (among named and unnamed forms) of both s... more The Argentinean opiliofauna comprises about 115 species (among named and unnamed forms) of both suborders Palpatores and Laniatores. All nine families from Argentina are listed, three belonging in the Palpatores and six in the Laniatores, with a list of the hitherto valid genera and species in the country. Palpatores represent only 16 % of the specific richness, whereas the laniatorid family Gonyleptidae is the most speciose in the country, containing 64 % of the recorded species. Argentinean opilionids are distributed in two major sectors (northeastern and Andean-Patagonian), separated by a wide xeric zone that bears only relictual populations and a few cave forms. The northeastern sector is divided into five opiliological areas: Mesopotamic (comprising the Misiones subarea), Pampean, Central Sierras, Chacoan, and Yungas. Observations on the distribution of the Subantarctic opiliofauna are provided. Habitat disturbance situations, presumably threatening vulnerable harvestmen specie...

This paper gives an updated summary on the diversity of the arder Scorpiones in the Argentinian p... more This paper gives an updated summary on the diversity of the arder Scorpiones in the Argentinian part of the Western Chaco. A total of 11 species are registered, and they are clasified in three groups, according to their distributional patterns: typical chaco species (Timogenes elegans, Timogenes dorbignyi, Brachistosternus ferrugineus, Bothriurus chacoensis, Tityus confluens), peripherical species (Brachistosternus pentheri, Bothriurus cordubensis n.sp. (hereby named), Urophonius brachycentrus, Tityus trivittatus) and rare species (Vachonia sp., Zabius birabeni). Some comments on the known range of each form are added.

This chapter gives updated check-lists of three groups of Arachnids in the province of Córdoba: O... more This chapter gives updated check-lists of three groups of Arachnids in the province of Córdoba: Opiliones, Scorpiones and water mites. For the order Opiliones, 23 species (belonging to 5 families) are reported, while in the order Scorpiones there are 18 species (one of them in need of onfirmation), in 2 families; finally, 33 species of hydracarids, distributed in 14 families are listed. For all three groups some comments on their distributional patterns are added, and for Opiliones and Scorpiones, maps of the known range for each species are also provided.

The purpose of this application under Articles 23.9.3 and 81.2.3 of the Code is to conserve the w... more The purpose of this application under Articles 23.9.3 and 81.2.3 of the Code is to conserve the well known specific name of Bothriurus alticola Pocock, 1899 for a scorpion (family BOTHRIURIDAE) from Argentina by giving it precedence over the little used subspecific name Cercophonius braehycentrus bivittatus Thorell, 1877. Pocock's nominal species is the type of Orobothriurus Maury, 1976, a genus currently including 10 species from Andean and sub-Andean localities in Argentina and Peru, most occurring at high altitude.

Bulletin of Zoological Nomenclature, 2003

... Bucheri, W. 1963. Escorpiões e escorpionismo no Brasil. XI. ... Pp. 47-50 in Lesson, RP, Voya... more ... Bucheri, W. 1963. Escorpiões e escorpionismo no Brasil. XI. ... Pp. 47-50 in Lesson, RP, Voyage autour du monde, exécuté par ordre du Roi, sur la corvette de sa Majesté, La Coquille, pendant les années 1822, 1823, 1824 et 1825, par LI Duperrey, Zoologie, vol. 2, pt. ...

This paper is the first report about fluorescence for the order Opiliones. The observations were ... more This paper is the first report about fluorescence for the order Opiliones. The observations were made under U. V. light on living and preserved specimens of two common Pachylinae from Córdoba (Argentina): Sphaleropachylus fulvigranulatus (MELLO-LEITAO, 1930) and S. butleri (THORELL, 1877). By making use of this property, the U.V. resource may become a useful tool in field studies on Opiliones.

This species is redescribed and its diagnosis is revised and updated. It is established that U. b... more This species is redescribed and its diagnosis is revised and updated. It is established that U. brachycentrus (Thorell, 1876) and U. iheringi Pocock, 1893 are its nearest relatives; they differ from U. achalensis in the chromatic diagram, the ventral granulation of metasomal segment III, the number of pectinal teeth, the shape of telson and the hemispermatophore.

Redescription of Neopucroliella mesembrina Ringuelet, 1961 nov. stat. - (Opiliones, Gonyleptidae,... more Redescription of Neopucroliella mesembrina Ringuelet, 1961 nov. stat. - (Opiliones, Gonyleptidae, Pachylinae) . Neopucroliella mesembrina Ringuelet, 1961 is adequately redescribed and illustrated; this species, formerly regarded as a subspecies of N. borgmeieri (Mello-Leitao, 19231, is hereby raised to the specific rank. A distribution map, as well as some comments on the phylogenetic relationships in the genus Neopucroliella and related genera are also included.

The genus Cercophonius Peters is revised, and generic and specific diagnosis are updated. By mean... more The genus Cercophonius Peters is revised, and generic and specific diagnosis are updated. By means of the study of specimens from different localities and the type material, four species (C. michaelseni Kraepelin, C. sulcatus Kraepelin, C. granulosus Kraepelin and C. kershawi Glauert), formerly synonymyzed with the type species C. squama (Gervais), are hereby reinstated as valid; a sixth, new species, C. queenslandae is described. The diagnostic characters used at specific level are: development of ventral carinae in caudal segments I to IV and sternite V; morphology of the hemispermatophore, and pigmentary patterns of tergites and metasoma; other characters, such as the number of pectinal teeth, total lenght and the shape of telson show some differences useful to the determination, although not permiting a clear separation of the species. A key for the species, as well as a discussion on the taxonomic relationships of Cercophonius with Urophonius Pocock and Phoniocercus Pocock (its...

In this paper Parabalta sicaria Roewer, 1925 and P. borellii Roewer, 1925 -the last regarded up t... more In this paper Parabalta sicaria Roewer, 1925 and P. borellii Roewer, 1925 -the last regarded up to now as "species inquirendaV- are redescribed and illustrated; lectotypes for each species are hereby designated, and in both cases the type localities are accurately determined. A map of the known localities is added.

Bothriurus chacoensis, a new species belonging to the bonariensis group, is described and illustr... more Bothriurus chacoensis, a new species belonging to the bonariensis group, is described and illustrated. In comparison to the typical form, B. bonariensis (C.L. Koch), B. chacoensis is darker and smaller, and shows a lower number of pectinal teeth. The sharpest differences are in the hemispermatophore: (1) the frontal ridge extends from 57,5 to 62% of the lamella lenght (46-55% in B. bonariensis ), (2) the rigth basal lobe has an apical filament,which is absent on the left one (in B. bonariensis both lobes lack a filament). Bothriurus chacoensis inhabits the Chacoan biogeographical province, especially its occidental district, of Argentina, Paraguay and southern Bolivia.

The stridulation in a Bothriurid scorpion, Timogenes elegans (Mello-Leitao), is first reported. T... more The stridulation in a Bothriurid scorpion, Timogenes elegans (Mello-Leitao), is first reported. The stridulatory apparatus consists of groups of granules, placed on the mesosomal pretergites III to VI, which are rubbed by the caudal edge of the previous tergite, while the animal curves the body as a defensive behaviour. The sonogram of the stridulation sounds produced by this species, as well as a brief account of what is known on the subject in the order Scorpiones, are added. The possible role of sound in T. elegans is discussed.

New localities for Argentinian scorpions (Arachnida, Scorpiones). New records of seven scorpion s... more New localities for Argentinian scorpions (Arachnida, Scorpiones). New records of seven scorpion species from central-west Argentina are reported. The known ranges of Bothriurus noa Maury, B. prospicuus Mello-Leitao, Brachistosternus ferrugineus (Thorell), B.pentheri Mello-Leitao, Vachonia sp., Tityus confluens Borelli, and Zabius birabeni Mello-Leitao are either extended or their actual limits more precisely determined.

The results of scorpiofaunal surveys, carried out in eight westem chaco areas belonging to the Ll... more The results of scorpiofaunal surveys, carried out in eight westem chaco areas belonging to the Llanos district (Argentina), are given. Nine scorpion species have been recorded in the whole district. The specific composition in each site was quantified, and their similarities and differences are commented; additionally, a chaco area outside of the Llanos was also sampled for comparisons. One of the study sites (Chancaní, in westem province of Córdoba) bears the highest number of sympatric scorpions so far recorded in an Argentinían locality (nine species). KEY-WORDS.- Scorpiones, Diversity, Chaco, Llanos district.

Bothriurus olaen, a new scorpion species from the Sierras de Cordoba and San Luis in Central Arge... more Bothriurus olaen, a new scorpion species from the Sierras de Cordoba and San Luis in Central Argentina, is described. It belongs to the burmeisteri species-group, and differs from the so far only named species in the group, B. burmeisteri Kraepelin, in bearing less developed lateroventral and submedian ventral keels on caudal segment V. Another species, yet unnamed, from Northwestern Argentina and Southern Bolivia, is determined to be the nearest relative of B. olaen n. sp.; these forms are kept as separate entities because of subtle morphological features, and their very different patterns of distribution.

The order Scorpiones is represented in Argentina by two families: the Gondwanian Bothriuridae are... more The order Scorpiones is represented in Argentina by two families: the Gondwanian Bothriuridae are the most speciose and with wider range, whereas the cosmopolitan Buthidae are poorly represented in the country. A species checklist and an identification key for supraspecific entities are provided, to update those induded in earlier monographs and checklists. Nine genera and 41 nominal valid species are listed, as well as nine binomens with unclear status, and about 10 forms probably still unnamed, belonging mainly to Brachistosternus (Leptosternus), Bothriurus and Urophonius. Two genera and 24 species have not been found yet in other countries, and four species are small area endemics. Biogeographic patterns allow to the recognition of five areas belonging to a "subtropical" ancestry (Chacoan, Yungas, Mesopotamic, Misiones, and Pampasic areas), and four related to an "Andean-Patagonian" pattern (high-Andean, Palagonian, Subandean, and Peripampasic areas). Some fea...

Senckenbergiana biologica

An updated catalogue of the type material of the Pachylinae species described by ROEWER is presen... more An updated catalogue of the type material of the Pachylinae species described by ROEWER is presented. A total of 111 species, included by ROEWER in the subfamily, as well as 3 species originally in Gonyleptinae, are listed in their original combinations (genus transfers and synonymies are pointed out). Informations on the labels, number and sex of specimens, and data in the catalogues are provided. Comments on the nomenclatural status of the material are added.

Journal of Arachnology

The nominal genus Bosqia Canals 1933 is determined to be junior subjective synonym of Pachyloides... more The nominal genus Bosqia Canals 1933 is determined to be junior subjective synonym of Pachyloides Holmberg 1878. This results in the new combination Pachyloides tucumanus (Canals 1933) for the only species hitherto assigned to Bosqia, and in a secondary homonymy with Pachyloides tucumanus Canals 1943. For the latter, the new name Pachyloides yungarum is proposed. The article provides a redescription of Pachyloides tucumanus (Canals 1933) new combination, including the male external and genital morphology (previously unknown). New records of the species are also reported.

The Argentinean opiliofauna comprises about 115 species (among named and unnamed forms) of both s... more The Argentinean opiliofauna comprises about 115 species (among named and unnamed forms) of both suborders Palpatores and Laniatores. All nine families from Argentina are listed, three belonging in the Palpatores and six in the Laniatores, with a list of the hitherto valid genera and species in the country. Palpatores represent only 16 % of the specific richness, whereas the laniatorid family Gonyleptidae is the most speciose in the country, containing 64 % of the recorded species. Argentinean opilionids are distributed in two major sectors (northeastern and Andean-Patagonian), separated by a wide xeric zone that bears only relictual populations and a few cave forms. The northeastern sector is divided into five opiliological areas: Mesopotamic (comprising the Misiones subarea), Pampean, Central Sierras, Chacoan, and Yungas. Observations on the distribution of the Subantarctic opiliofauna are provided. Habitat disturbance situations, presumably threatening vulnerable harvestmen specie...

This paper gives an updated summary on the diversity of the arder Scorpiones in the Argentinian p... more This paper gives an updated summary on the diversity of the arder Scorpiones in the Argentinian part of the Western Chaco. A total of 11 species are registered, and they are clasified in three groups, according to their distributional patterns: typical chaco species (Timogenes elegans, Timogenes dorbignyi, Brachistosternus ferrugineus, Bothriurus chacoensis, Tityus confluens), peripherical species (Brachistosternus pentheri, Bothriurus cordubensis n.sp. (hereby named), Urophonius brachycentrus, Tityus trivittatus) and rare species (Vachonia sp., Zabius birabeni). Some comments on the known range of each form are added.

This chapter gives updated check-lists of three groups of Arachnids in the province of Córdoba: O... more This chapter gives updated check-lists of three groups of Arachnids in the province of Córdoba: Opiliones, Scorpiones and water mites. For the order Opiliones, 23 species (belonging to 5 families) are reported, while in the order Scorpiones there are 18 species (one of them in need of onfirmation), in 2 families; finally, 33 species of hydracarids, distributed in 14 families are listed. For all three groups some comments on their distributional patterns are added, and for Opiliones and Scorpiones, maps of the known range for each species are also provided.

The purpose of this application under Articles 23.9.3 and 81.2.3 of the Code is to conserve the w... more The purpose of this application under Articles 23.9.3 and 81.2.3 of the Code is to conserve the well known specific name of Bothriurus alticola Pocock, 1899 for a scorpion (family BOTHRIURIDAE) from Argentina by giving it precedence over the little used subspecific name Cercophonius braehycentrus bivittatus Thorell, 1877. Pocock's nominal species is the type of Orobothriurus Maury, 1976, a genus currently including 10 species from Andean and sub-Andean localities in Argentina and Peru, most occurring at high altitude.