Content uploaded by Pierre Delforge
Author content
All content in this area was uploaded by Pierre Delforge on May 22, 2020
Content may be subject to copyright.
A preview of the PDF is not available
Orchid of island Cos (Greece)
ResearchGate has not been able to resolve any citations for this publication.
Within the preparation of an updated practice-orientated fieldguide on the European and Mediterranean orchids and of the OPTIMA-Atlas on their distribution (BAUMANN et al. 2002, 2004) the review of nomenclaturally and taxonomically critical taxa as weil as fieldwork has been continued. From this some entities were recognised as new taxa, several others were attributed to different, mainly lower ranks or were evaluated as younger synonyms. Few of the new taxa are treated at this place very concisely, more detailed treatments are in preparation and will be published in this Journal at a later stage.
To resolve differentiation problems within Italian Serapias-taxa extensive new
material from Italy, eorse, Malta and Provence has been investigated
morphometrically followed by statistical evaluation including multivariate
analysis. Documentation of data is delivered. The following 11 taxa have been
proven to belong to the Italian flora: Serapias bergonii, S. cordigera, S.
cossyrensis, S. lingua, S. neglecta, S. nurrica, S. orientalis subsp. apulica, S.
orientalis subsp. siciliensis, S. parviflora, S. vomeracea subsp. vomeracea and
S. vomeracea subsp. longipetala. These can be grouped according width of
petala to three subsectiones Stenopetalae, Mediopetalae and Platypetalae.
Records of S. politisii from Apulia have to be attributed to S. bergonii. No
confirmed records of S. olbia und S. strictiflora, occuring in neighbouring
Provence and Corse are available for Italy. An artificial key based on
differential characters, useful for fieldwork, is delivered together with an
overview of the grouping of the taxa. Furthermore differential characters of
the somewhat less rare hybrids Serapias cordigera x S. lingua, S. lingua x S.
parviflora und S. lingua x S. vomeracea are communicated. Current and
historical horizontal as weH as vertical distribution of Italian Serapias taxa are
shown on maps with UTM 10 km grid based on the evaluation of published
sources and unpublished records. Degrees of threat have been evaluated and
recommendations for the inclusion of the threatened Serapias species in the
Regional Red List of the Plants of Italy are given.
Description of a new species of the genus Ophrys from Rhodes, which is connected between Ophrys heterochila and Ophrys minutula. Distribution map of this new taxon, based on a 2 km-Grid is provided.
UPb isotopic analyses of discordant zircons from undeformed Miocene I-type granitoids from the central Aegean, Greece, have identified an example of post-igneous Pb loss from clear, non-metamict zircons which cannot be related to any post-igneous thermal overprint. It is suggested that partial loss of Pb took place during the final rapid uplift of the plutons and their metamorphic country rocks as deduced from KAr, Rb%z.sbnd;Sr and fission-track dates on different minerals. Zircons from Miocene plutons which were mylonitized shortly after emplacement were overprined by deformation-enhanced fluid migration, resulting in discolouration of originally pink zircons, again in U, and possibly also a loss of radiogenic Pb.Metamict uranothorites exhibit present-day Th/U ratios which are significantly lower than the time-integrated ratios calculated from the measured Pb isotopic compositions. This indicates that the uranothorites lost considerable amounts of Th. Since UPb dates of the uranothorites are mostly higher than or equal to those of the coexisting zircons it is assumed that loss or gain of U or Pb accompanying the Th loss was minor.