scholarly journals Contribución al conocimiento cariológico del género Cenntaurea L. (Asteraceae) en la Península Ibérica

2008 ◽  
Vol 33 ◽  
pp. 69-90 ◽  
Author(s):  
Eusebio LÓPEZ TIRADO ◽  
Juan Antonio Devesa
Keyword(s):  
Chromosome Number ◽  
Iberian Peninsula ◽  
Diploid Number ◽  
Basic Number ◽  
Karyological Study ◽  
Tetraploid Level ◽  
First Time ◽  
Península Ibérica

RESUMEN. Contribución al conocimiento cariológico del género Centaurea L. (Asteraceae) en laPenínsula Ibérica. Se da a conocer el número cromosómico de 22 táxones de Centaurea L. sect.Centaurea. En particular, se han estudiado 18 táxones del grupo de C. paniculata L., de los que C.paniculata subsp. exilis Arènes, C. paniculata subsp. geresensis Arènes, C. coutinhoi Franco, C.kheilii (Pau) Pau, C. limbata var. insularis Pau, C. castellanoides subsp. talaverae E. López & Devesa,C. cordubensis Font Quer, C. bethurica E. López & Devesa y C. schousboei Lange lo han sido porvez primera. Del grupo de C. alba L. se han estudiado 4 táxones, siendo nuevos los recuentos de C.costae Willk. var. costae y C. costae var. maluqueri Font Quer. En ambos grupos el número básicoencontrado ha sido x = 9. El número diploide 2n = 18 es el más frecuente mientras que el niveltetraploide 2n = 36(4x) sólo se ha detectado en C. aristata Hoffmanns. & Link, C. cordubensis FontQuer y C. schousboei Lange.Palabras clave. Asteraceae, Centaurea, número cromosómico, Península Ibérica.ABSTRACT. A contribution to the karyological knowledge of the genus Centaurea L. (Asteraceae)in the Iberian Peninsula. A karyological study of 22 taxa of genus Centaurea L. sect. Centaurea isreported. Within C. paniculata L. group we have studied 18 taxa and the reports for some of them aregiven for the first time: C. paniculata subsp. exilis Arènes, C. paniculata subsp. geresensis Arènes,C. coutinhoi Franco, C. kheilii (Pau) Pau, C. limbata var. insularis Pau, C. castellanoides subsp.talaverae E. López & Devesa, C. cordubensis Font Quer, C. bethurica E. López & Devesa and C.schousboei Lange. Within C. alba L. group we have studied the chromosome number of 4 taxa, butonly C. costae Willk. var. costae y C. costae var. maluqueri Font Quer are studied for the first time.In both groups we have found the basic number x = 9. Diploid number 2n = 18 is the most frequentwhereas tetraploid level 2n = 36(4x) has been found only in C. aristata Hoffmanns. & Link, C.cordubensis Font Quer and C. schousboei Lange.Key words. Asteraceae, Centaurea, chromosome number, Iberian Peninsula.

Contribución al conocimiento cariológico del género Centaurea L. (Asteraceae) en la Península Ibérica. Sect. Seridia (Juss.) DC. A contribution to the karyological knowledge of the genus Centaurea L. (Asteraceae) in the Iberian Peninsula. Sect. Seridia (Juss.) DC.

2013 ◽  
Vol 38 ◽  
pp. 41-47 ◽  
Author(s):  
Vanessa R. Invernón ◽  
Juan Antonio Devesa ◽  
Eusebio López
Keyword(s):  
Iberian Peninsula ◽  
Diploid Number ◽  
Karyological Study ◽  
Tetraploid Level ◽  
First Time ◽  
Península Ibérica

Español.  Se da a conocer el número cromosómico de 10 taxones del género Centaurea pertenecientes a la sección Seridia (Juss.) DC. presentes en la Península Ibérica. En el caso de Centaurea lusitanica var. crassifolia P. Silva, C. aspera subsp. stenophylla (Dufour) Nyman y C. barrasii Pau se trata, al parecer, del primer recuento. El número diploide 2n = 22 es el más frecuente en el grupo estudiado, mientras que el nivel tetraploide 2n = 44 sólo se ha detectado en C. seridis L. y C. sphaerocephala L.English. A karyological study of taxa of genus Centaurea L. sect. Seridia (Juss.) DC. in the Iberian Peninsula is reported. We have studied 10 taxa and the reports for 3 of them are given for the first time: Centaurea lusitanica var. crassifolia P. Silva, C. aspera subsp. stenophylla (Dufour) Nyman and C. barrasii Pau. Diploid number 2n = 22 is the most frequent whereas tetraploid level 2n = 44 has been found only in C. seridis L. and C. sphaerocephala L.

Karyological Studies in the Genus Androcymbium (Colchicaceae)

1999 ◽  
Vol 47 (1) ◽  
pp. 131 ◽  
Author(s):  
Marta Margelí ◽  
Joan Pedrola-Monfort ◽  
Joan Vallès Xirau
Keyword(s):  
Chromosome Number ◽  
Basic Number ◽  
Chromosome Counts ◽  
Karyological Study ◽  
First Time

A karyological study was carried out in the genusAndrocymbium Willd. The karyotypes of 26 populationsbelonging to six species of the section Erythrostictus(Schldtl.) Benth. in Benth. & Hook.f. (included intheA. gramineum (Cav.) T.Macbr. group) and of onepopulation of a species of the section Androcymbium are established and themean results for each taxon are given. Chromosome counts from severalpopulations of all the species, the chromosome number ofA. eucomoides Willd., and most of the karyotypes arepresented here for the first time. A new basic number, x= 10, is also reported for the genus. On the basis of the dataobtained, a descendent dysploidy process in the evolution of the genus issuggested and the members of the A. gramineum group areconsidered to be schizoendemics.

scholarly journals A KARYOSYSTEMATIC INVESTIGATION IN THE GRAMINEAE

1934 ◽  
Vol 11 (2) ◽  
pp. 213-241 ◽  
Author(s):  
A. W. S. Hunter
Keyword(s):  
Chromosome Number ◽  
Basic Number ◽  
Chromosome Morphology ◽  
The Other ◽  
Anthoxanthum Odoratum ◽  
Large Genus ◽  
Taxonomic Studies ◽  
Different Characteristics ◽  
First Time

The history and the present state of the classification of the Gramineae are briefly reviewed and a number of the different characteristics on which phylogenetic systems have been based are considered. The subjects of chromosome morphology and the application of idiograms and karyotypes to taxonomic studies are discussed. Avdulov's recently reported findings on the phylogeny of the grasses are summarized and compared with the results of other workers and those obtained in the present investigation. Three species of bamboos were studied for the first time and evidence secured to indicate that the basic number of the tribe is probably not 12 as has been elsewhere reported. In the Festuceae the chromosome number of Phragmites communis Trin. was definitely ascertained, confirming Avdulov's supposition that the basic number for the genus is 12. The other three species investigated agreed with the arrangement as proposed by Avdulov. The tribe Chlorideae, with the exception of the genus Beckmannia, has been reported to be almost entirely Panicoid with respect to chromosome morphology. This was confirmed in the four species examined. Avdulov's rearrangement of the tribe Hordeae was somewhat altered and a confusion m the nomenclature of the genus Lepturus was corrected. An anomalous situation was cleared up in the tribe Agrostideae by the establishment of the chromosome number of Sporobolus tennuissinus Kuntz as 40. The specimen of Anthoxanthum odoratum L. (tribe Phalarideae) examined provided a very interesting example of secondary splitting in somatic chromosomes. One species was examined in the tribe Melinideae and six in the tribe Paniceae. In the latter tribe no difference could be detected between the several subdivisions of the genus Panicum. The same condition held for the large genus Andropogon in the tribe Andropogoneae. In the tribe Maydeae the chromosome number of Tripsacum dactyloides L. was found to be 9, and the suggestion was made that it may be a link, along with the genus Coix, between the Andropogoneae and the Maydeae. The other four species examined all had a basic number of 10.

scholarly journals Els macroforaminífers i la fauna associada del Maastrichtià del sector Prebètic valencià sud (Est de la Península Ibèrica)

2019 ◽  
pp. 55-76
Author(s):  
P. Granero ◽  
R. Robles-Salcedo ◽  
G. Lucena ◽  
L. Troya ◽  
V. Vicedo
Keyword(s):  
Iberian Peninsula ◽  
Upper Cretaceous ◽  
Larger Foraminifera ◽  
Associated Fauna ◽  
Foraminiferal Assemblage ◽  
Foraminiferal Species ◽  
Benthic Foraminiferal Assemblage ◽  
First Time ◽  
Península Ibérica ◽  
Cretaceous Deposits

Larger foraminifera and associated fauna from the Maastrichtian of the southern valencian Prebaetic sector (E Iberian Peninsula) The benthic foraminiferal assemblage and the associated fauna found in the Upper Cretaceous deposits of the Serra de la Solana, Valencia (Spain) have been revised. The study has allowed us to confirm the presence of the foraminiferal species Hellenocyclina beotica Reichel, Siderolites aff. calcitrapoides Lamarck, Orbitoides apiculata Schlumberger, Orbitoides gensacicus (Leymerie) and Omphalocyclus macroporus (Lamarck), as stated by previous authors. In addition, the revision has permitted to identify some other species, never cited before in Serra de la Solana and neighbour regions in Iberian Peninsula, such as Fissoelphidium operculiferum Smout and Selimina cf. spinalis Inan and two different morphotypes of rotaliids that we have left in open nomenclature, namely, Rotaliidae indet. sp. 1 and Rotaliidae indet. sp. 2. The rudists and echinoid found associated to these benthic foraminifera have been also revised. The rudist species found are Hippurites radiosus Des Moulins, Hippurites cornucopiae Defrance, Hippurites cf. lamarcki Douvillé, and Apricardia sp., the two latter cited in Serra de la Solana for the first time. The echinoid assemblage is composed of the species Pygopyrina darderi (Lambert), Linthia payeni (Coquand) and Hemipneustes striatoradiatus (Leske). The whole assemblage, typical of shallow-water platform environments, is Upper Maastrichtian in age and shows some differences in respect other contemporaneous asseblages from other paleogeographical areas.

scholarly journals II Encuentro de la Sociedad Ibérica de Micología (Cerler, 26-30 de septiembre de 2018): hallazgo de 103 especies nuevas para Aragón, 15 para la Península Ibérica y 11 especies nuevas para la ciencia

Fungi Iberici ◽  
2020 ◽  
pp. 7-80
Author(s):  
Ibai Olariaga ◽  
Luis Ballester ◽  
Unai Fernandes ◽  
Juan Ignacio López-Amiano ◽  
Viridiana Magaña ◽  
...  
Keyword(s):  
Iberian Peninsula ◽  
Formal Description ◽  
First Time ◽  
Península Ibérica ◽  
Meeting Material

The scientific outcome of the 2nd Meeting of the Iberian Mycological Society, held in Cerler (Huesca, Spain), is presented here. After conducting fieldwork in 8 localities 949 georeferenced records of fungi belonging to at least 545 species were generated. One hundred and four species are reported for the first time for Aragon, whereas two, Agaricus moelleroides and Hygrophorus hedrychii are reported for the first time in Spain, and 15 taxa represent novelties for the Iberian Peninsula. Furthermore, during the meeting material belonging to 11 new to science species was collected, which are at different stages of investigation. Two of these, Entoloma “stenocystis” and Mycetinis “gramineus” are proposed provisionally here as new, albeit further material of them needs to be found for a formal description. The amount and interest of the results presented here, obtained after conducting fieldwork during only three days substantiates the idea that this kind of events contribute significantly to the knowledge of the mycological flora of different areas of our territory.

CHROMOSOMES AND TAXONOMY OF EASTERN NORTH AMERICAN POLYGONUM

1956 ◽  
Vol 34 (4) ◽  
pp. 501-521 ◽  
Author(s):  
Áskell Löve ◽  
Doris Löve
Keyword(s):  
Chromosome Number ◽  
North American ◽  
Diploid Number ◽  
Basic Number ◽  
Great Variability ◽  
Species Level ◽  
Eastern North America ◽  
Low Degree ◽  
Close Relationship ◽  
High Degree

It is pointed out that cytological, palynological, and morphological investigations support the division of the collective genus Polygonum into natural units. The 13 sections of the collective genus are grouped into six natural genera, two of which include five and four sections, respectively, while the remaining four genera are monosectional. The present paper is a report on combined cytological and taxonomical studies of the genus Polygonum s.str. in eastern North America, including 25 taxa of the section Polygonum (= Avicularia) and one species of the section Duravia. The basic number of chromosomes of Polygonum s.str. is x = 10; all the chromosomes have an almost median centromere and thus cannot be morphologically distinguished from each other. The chromosome numbers within the group range from the diploid number 2n = 20 to the octoploid number 2n = 80. Nine species (12 taxa) are diploid; seven species (eight taxa) are tetraploid; four species (five taxa) are hexaploid, and one species is octoploid. Hybrids between several of these taxa revealed that while most species with even the same chromosome number are so different cytogenetically that their offspring are almost completely sterile, others show such close relationship that they cannot be regarded as more distinct than are intraspecific races. In spite of the use here of a system very different from those accepted in recent North American manuals, no new names or combinations are needed, since all the taxa here studied have been described in acceptable categories by previous botanists. It has been suggested that the great variability of at least one of the collective species included in recent North American manuals might be due to the occurrence of apomixis. This suggestion could not be verified, although a low degree of facultative apomixis is possible. The variation which occurs in the same locality is shown to be caused mainly by the fact that the false populations are composed of several morphologically and biologically distinct taxa at the species level, and the constancy of intraspecific races, even when they are growing together as a result of the activities of man, seems to be the result of a high degree of autogamy.

scholarly journals Estudio taxonómico del complejo Festuca alpina (Poaceae, Pooideae) en la Península Ibérica. Taxonomic study of Festuca alpina complex (Poaceae, Pooideae) in the Iberian Peninsula.

2017 ◽  
Vol 41 ◽  
pp. 19 ◽  
Author(s):  
Eusebio López ◽  
Gloria Martínez-Sagarra ◽  
Juan Antonio Devesa
Keyword(s):  
Chromosome Number ◽  
Iberian Peninsula ◽  
Geographical Distribution ◽  
Leaf Anatomy ◽  
Taxonomic Revision ◽  
Taxonomic Study ◽  
Anatomía Foliar ◽  
Distribución Geográfica ◽  
Península Ibérica

Español. Se ha efectuado la revisión taxonómica del complejo Festuca alpina en la Península Ibérica. Se reconocen 3 especies para el territorio: Festuca alpina, F. glacialis y F. frigida. Se aporta una clave para la identificación de los taxones, así como su descripción morfológica, anatomía foliar, distribución geográfica, apetencias ecológicas, fenología y número cromosómico.Inglés. A taxonomic revision of Festuca alpina complex in the Iberian Peninsula has been made. Three species are recognized in the territory: Festuca alpina, F. glacialis y F. frigida. A key for the identification of taxa is provided, also their morphological and leaf anatomy description, geographical distribution, ecology, phenology and chromosome number are given.

scholarly journals Non-indigenous terrestrial flatworms in Torrevieja (Alicante): presence of Bipalium cf. kewense Mosely, 1878 (Platyhelminthes, Tricladida, Geoplanidae)

2019 ◽  
pp. 69-72
Author(s):  
Pujol Juan Antonio ◽  
Ubero-Pascal Nicolás
Keyword(s):  
Alien Species ◽  
Iberian Peninsula ◽  
Potential Risk ◽  
Invasive Alien Species ◽  
Natural Environments ◽  
Observation Area ◽  
First Time ◽  
Península Ibérica

Se cita por primera vez en la provincia de Alicante (península ibérica) la especie de planaria terrestre exótica Bipalium cf. kewense Moseley, 1878. Con esta presencia aumenta el área de distribución de la especie en la Comunidad Valenciana, siendo la más meridional. Dado que la especie está considerada en esta comunidad autónoma como especie exótica invasora, se valora el riesgo potencial de colonización de ambientes naturales limítrofes a la zona de observación (jardín privado en zona urbanizada). The non-indigenous terrestrial flatworm Bipalium cf. kewense Moseley, 1878 is reported in Alicante province (Iberian Peninsula) for the first time. This occurrence is the most meridional from the Comunidad Valenciana, enlarging its distribution in this area. As the species is considered an invasive alien species in this region, the potential risk of colonizing natural environments closer to the observation area is evaluated.

Contribution to the caryological study of the African grass Aristida rhiniochloa Hochst., based on specimens from the Southern Hemisphere

Bothalia ◽  
1972 ◽  
Vol 10 (4) ◽  
pp. 555-5564 ◽  
Author(s):  
Pierre Bourreil ◽  
Alain Geslot ◽  
Monique Gorlier ◽  
Bernard De Winter
Keyword(s):  
Chromosome Number ◽  
Southern Hemisphere ◽  
North Africa ◽  
Diploid Number ◽  
Diploid Species ◽  
Basic Number ◽  
Meiotic Behaviour ◽  
African Grass ◽  
Haploid Complement

The chromosome number established for Aristida rhiniochloa Hochst. by the study of material from three localities in the Southern Hemisphere confirms the results obtained on material from North Africa. The haploid complement (n = 11) and the diploid number (2n = 22) of this species conform to the basic number x = 11 typical for the Aristideae. It is shown that the caryotype of this species is sub-symmetrical. Preliminary studies o f material from two localities show that the meiotic behaviour conforms to that found in the diploid species with n bivalents.

scholarly journals Estudio taxonómico del complejo Festuca alpina (Poaceae, Pooideae) en la Península Ibérica. Taxonomic study of Festuca alpina complex (Poaceae, Pooideae) in the Iberian Peninsula.

2016 ◽  
Vol 41 ◽  
pp. 19-32 ◽  
Author(s):  
Eusebio López ◽  
Gloria Martínez-Sagarra ◽  
Juan Antonio Devesa
Keyword(s):  
Chromosome Number ◽  
Iberian Peninsula ◽  
Geographical Distribution ◽  
Leaf Anatomy ◽  
Taxonomic Revision ◽  
Taxonomic Study ◽  
Anatomía Foliar ◽  
Distribución Geográfica ◽  
Península Ibérica

Español. Se ha efectuado la revisión taxonómica del complejo Festuca alpina en la Península Ibérica. Se reconocen 3 especies para el territorio: Festuca alpina, F. glacialis y F. frigida. Se aporta una clave para la identificación de los taxones, así como su descripción morfológica, anatomía foliar, distribución geográfica, apetencias ecológicas, fenología y número cromosómico.Inglés. A taxonomic revision of Festuca alpina complex in the Iberian Peninsula has been made. Three species are recognized in the territory: Festuca alpina, F. glacialis y F. frigida. A key for the identification of taxa is provided, also their morphological and leaf anatomy description, geographical distribution, ecology, phenology and chromosome number are given.

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