Topic
Candidula
About: Candidula is a research topic. Over the lifetime, 13 publications have been published within this topic receiving 138 citations.
Papers
TL;DR: This work studied the spatial distribution of the realized environmental niche in three land snail species of the genus Candidula, integrating phylogeographical methods, morphometrics, and spatial biodiversity informatics and proposes a practicable framework to test hypotheses on intraspecific niche evolution.
Abstract: The range dynamics of a species can either be governed by the spatial tracing of the fundamental environmental niche or by adaptation that allows to occupy new niches. Therefore, the investigation of spatial variation in the realized environmental niche is central to the understanding of species range limit dynamics. However, the study of intraspecific niche variation has been neglected in most phylogeographical studies. We studied the spatial distribution of the realized environmental niche in three land snail species of the genus Candidula, integrating phylogeographical methods, morphometrics, and spatial biodiversity informatics. The phylogeographical analyses showed significant range expansions in all species. These expansions were accompanied in Candidula gigaxii by a shift in the realized environmental niche, the species Candidula unifasciata followed its ancestral niche during expansion while the climate changed in the area of origin and Candidula rugosiuscula tracked the ancestral environmental conditions. The significant niche shifts were associated with potentially adaptive changes of shell morphology. We propose our presented approach as a practicable framework to test hypotheses on intraspecific niche evolution. © 2007 The Linnean Society of London, Biological Journal of the Linnean Society, 2007, 90, 303–317.
45 citations
TL;DR: It is concluded that the cause for the ecological speciation of two land snail species in south-east France is most probably the establishment of the Mediterranean climate ≈ 3.2 mya.
Abstract: This paper studies the speciation of two land snail species in south-east France. By using two mitochondrial and one nuclear gene, the species are shown to be sister species within the larger clade of western European Candidula species. The species never occurred syntopically, but a narrow contact zone population was identified. Recent range expansions inferred from phylogeographical methods indicated that the present day distributions are not limited by the colonization capacity of the species. Analysis of environmental variables suggested distribution along an ecotone. The gastropod community is also correlated to this gradient. Morphometric shell analysis showed that the divergence between the sister species is a result of desiccation-resistant shell characters. We therefore conclude that the cause for the ecological speciation is most probably the establishment of the Mediterranean climate ≈ 3.2 mya. A model of ecological speciation with a moving ecotone is put forward. © 2003 The Linnean Society of London, Biological Journal of the Linnean Society, 2003, 79, 611–628.
40 citations
TL;DR: A novel polyhydroxylated sterol, 3β-25-dihydroxy-4-methyl-5α,8α-epidioxy-2-ketoergost-9-ene, along with three new ceramides, N -[(2 S,3 R, E )-1,3-Dihydroxylhexacos-4en2-yl]icosanamide (2 ), N-[( 2 S,3 S,4 R )- 1,3,4-trihyd
24 citations
TL;DR: It is shown that similar structures of the stimulatory apparatus of the genital system in different taxa do not necessarily indicate a close phylogenetic relationship in the Geomitridae.
18 citations
Journal Article•
TL;DR: Four endemic Candidula species are reported from Portugal and characterized conchologically, and several nominal taxa are classified in the synonymy of these six species, after topotypes (that might be syntypes) or lectotypes.
Abstract: Next to the wide-spread Candidula gigaxii (Pfeiffer, 1848) and C intersecta (Poiret, 1801), four endemic Candidula species are reported from Portugal and characterized conchologically, viz C belemensis (Servain, 1880) (provisionally), C codia (Bourguignat, 1859), C olisippensis (Servain, 1880) and C setubalensis (Pfeiffer, 1850) Several nominal taxa are classified in the synonymy of these six species, after topotypes (that might be syntypes) or lectotypes
12 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2018 | 1 |
| 2017 | 1 |
| 2015 | 2 |
| 2013 | 1 |
| 2011 | 1 |