Search results for "Axon"

Centaurea aspera subsp. geladensis, subsp. nov. (sect. seridia (Juss.) DC., Asteraceae), un nuevo taxon para la flora valenciana

2018

Se describe una nueva subespecie de Centaurea aspera L. (sect. Seridia (Juss.) DC., Asteraceae) procedente de las dunas fósiles del Parque Natural de Serra Gelada (L’Alfàs del Pi y Benidorm, Alicante, España). Se proporcionan datos morfológicos y ecológicos que permiten la diferenciación de la nueva subespecie con sus dos parientes cercanos C. aspera subsp. aspera y C. aspera subsp. stenophylla. A new subspecies of Centaurea aspera L. (sect. Seridia (Juss.) DC., Asteraceae) is described from the fossil dunes of Serra Gelada Natural Park (L’Alfàs del Pi and Benidorm, Alicante, Spain). Morphological and ecological data are provided which allow differentiation from the close relatives C. asper…

Precisiones corológicas y taxonómicas sobre la flora de Alicante

2007

Se presentan datos sobre la distribución y ecología de táxones nuevos o poco conocidos de la flora vascular de Alicante. Se aportan nueve primeras citas concretas para la flora provincial, siendo tres de ellas novedades asimismo para la Comunidad Valenciana. Además, se proponen dos nuevas combinaciones: Nepeta mallophora subsp. bourgaei (Briq.) M.B. Crespo, Camuñas & J.C. Cristóbal, y N. mallophora subsp. anticaria (Ladero & Rivas Goday ex Ubera & Valdés) M.B. Crespo, Camuñas & J.C. Cristóbal. Data are reported on distribution and ecology of new or poorly known taxa of Alicante province (E of Spain). Nine species are cited for the first time in that territory, being three of them also new f…

Allium achaium Boiss. & Orph. ex Boiss. (Alliaceae), a critical species of Greek flora

2011

Allium achaium Boiss. & Orph. ex Boiss. (Alliaceae), a critical and misappreciated species of Greek flora is investigated from taxonomic point of view and illustrated. It belongs to A. sect. Codonoprasum and shows close relationships with the taxa of the A. stamineum Boiss group. Besides, its karyology, ecology and distribution are examined.

Allium makrianum (Alliaceae), a new autumnal species from Greece

2010

Allium makrianum is described as a new species growing on the limestone of the Chios, north-eastern Aegean island (Greece). It is a very rare autumnal geophyte, showing some relationship with A. archeotrichon from Rhodos. Its iconography, morphology, chromosome number (2n=16), leaf anatomy, ecology and taxonomy are examined.

Phylogeny of the autumn-flowering species of A. sect. Codonoprasum from the Mediterranean region.

2009

Considerazioni tassonomiche e cariologiche sulle popolazioni siciliane di Sternbergia colchiciflora Waldst. & Kit. (Amaryllidaceae)

2004

A citotaxonomic study on two Sicilian populations of Sternbergia colchiciflora from Madonie and Mt. Etna was carried out. They show marked differences in their morphology and caryology.This suggests to treat them as two distinct taxa, but their correct taxonomic position needs further investigation on other populations of Sternbergia colchiciflora from Mediterranean area

Amaurodon mustialaënsis (Basidiomycota, Thelephoraceae) new to Italy

2014

Amaurodon mustialaensis is reported for the first time from Italy. Based on Italian specimens, a brief description, microscopical and macroscopical photographs, ecological and distributional data of this rare taxon are presented.

Endemism as a palaeobiogeographic parameter of basin history illustrated by early- and mid-Liassic peri-Tethyan ammonite faunas

2002

Abstract Episodes of endemism during Sinemurian–Pliensbachian times are described from synthetic data (publications and unpublished collections) about ammonite faunas of the western reaches of the Tethys. The Lusitanian, Sub-Betic and High Atlas basins receive special attention. The study shows that (1) endemism occurs principally in the Lusitanian and High Atlas basins, which are the most confined palaeogeographic structures; (2) it tends to occur synchronously in different basins but involving different taxa, i.e. it is independent of phylogeny; (3) it is not obviously correlated with relative sea-level at any given time. However, the fact that episodes of endemism coincide with second-or…

Ammonoid morphological signal versus sea-level changes

1997

The morphological diversity, considered as a biological signal, of a series of four Upper Callovian (Middle Jurassic) ammonite populations of Côte-d’Or (France) is quantified. These populations fall within two third-order sequences of a second-order transgression. A sampling method that adheres as closely as possible to the morphological characteristics of the populations is established. It is valuable in that it eliminates the subjectivity related to taxonomy to allow more objective comparisons between the biological signal (shell morphology) and the physical signal (eustasy).

First record of the enigmatic coleoid genus Longibelus from Sakhalin (Far East Russia): a contribution to our understanding of Cretaceous coleoid hab…

2021

AbstractA newly collected specimen of the enigmatic coleoid genus Longibelus is recorded from lower Turonian strata along the River Shadrinka in Sakhalin (Russian Far East). To date, this is the first record of Late Cretaceous coleoid cephalopods from the island and, in fact, from the entire Pacific coast of the Russian Federation. Lithological characteristics, coupled with published geochemical analyses (δ13C and Corg content), suggest the habitat of this coleoid taxon to have been the middle to outer (i.e. distal) shelf. Its provenance from the stratigraphical level that is known as the Scaphites Event, characterised by a mass occurrence of Scaphites and Yesoites, may be indicative of occ…