Showing papers in "Organisms Diversity & Evolution in 2006"

TL;DR: A novel classification of frogs in the family Mantellidae is proposed, based on published phylogenetic information and on a new analysis of molecular data, which accounts for recent progress in the understanding of the phylogeny and natural history of these frogs.

TL;DR: The study presents the first genetic confirmation for the existence of a species flock in a European ancient lake, and provides the first evidence for rapid morphological change in an European ancient Lake Ohrid species flock.

TL;DR: In this survey of petal and staminode elaborations throughout the eudicots, based on both new studies and a review of the literature, the diversity of such structures and their functions is discussed.

TL;DR: Extensions to the known distribution ranges of three additional species of Polylepis are reported and an updated key to species in the genus is provided.

TL;DR: Caprella scaura, first described from Mauritius and later reported in several ‘forms’ from all over the world, has now been found in the central and eastern Mediterranean and shows no significant difference to the topotypical material.

TL;DR: Most likely, the gecarcinucoid freshwater crabs have an African origin; their distribution can be explained by successive events of dispersal, and a new biogeographic hypothesis for the Gecarc inucoidea is proposed.

TL;DR: The guide, which includes marine and brackish water genera, starts with an introduction to methods of collection, extraction and examination of halacarid mites, an outline of the external morphology and life history, and an overview of the commonly used terminology.

TL;DR: All analyses support the inclusion of Echiura, Clitellata and Siboglinidae within polychaetes, and Bayesian analyses show EchiURA as the sister group of Capitellidae, in agreement with previous 18S rRNA results.

TL;DR: The phylogenetic relationships of the moss genus Pleurochaete was investigated using evidence from chloroplast and nuclear ribosomal DNA sequences, finding a neotropical origin of the genus, followed by long-distance dispersal of P. squarrosa into Eurasia and a further example for either lineage sorting or cryptic speciation in mosses.

TL;DR: The analyses demonstrate the need for taxon-specific rRNA models, which can capture evolutionary patterns in these molecules far better than general eukaryotic consensus structures and thus provide an improved basis for phylogenetic analyses incorporating secondary-structure information.

TL;DR: The nauplius is the earliest free-living stage in the development of most crustaceans, except in the majority of the Malacostraca, and several character states of the nauPLius larva are used as constitutive for the Crustacea as a whole.

TL;DR: A new species of Cycliophora is described with the aid of light- and electron microscopy, distinguished from the previously described species Symbion pandora by the presence of a posterior pair of retractable tubular appendages or toes in the Prometheus larva.

TL;DR: Endoparasitic chiggers were collected from juvenile Bufo quechua and adult Eleutherodactylus platydACTylus sampled in perhumid montane forests in Bolivia and the life style of Hannemania species, its evolution, and the parasites’ potential influence on their hosts are discussed.

TL;DR: A phylogenetic analysis using partial lsrDNA sequences to test the monophyly of Glypthelmins, and compares new sequences obtained with those published for different plagiorchiids to clarify the systematic position of GlyPThelmins within the order Plagiorchiida results in identical tree topology.

TL;DR: The phylogenetic analyses support the hypothesis that the strictly parapatric M. (Omaladera) are valid species rather than subspecies, and the group of species occurring in the Himalayas is no evidence that faunal exchange has occurred between these regions.

TL;DR: The musculature and nerve topography of mid-abdominal segments in both sexes of seven phasmid species are described and compared in detail for the first time including all putative basal taxa, e.g. members of Timema, Agathemera, Phylliinae, Aschiphasmatinae and Heteropteryginae.

TL;DR: Phylogenetic analyses suggest the D2 region to be most suitable not only for inferring relationships, but also for taxonomic and diagnostic purposes at species level and the D3 region is the most conserved, ITS-1 the most variable of the three gene regions investigated.

TL;DR: Five species of spirotrichonymphids representing three genera have been studied by light and immunofluorescence microscopy, and by transmission electron microscopy and the generic diagnosis of Microjoenia is emended, based on an ultrastructure study of M. fallax.

TL;DR: Four new species of Cyatheaceae from Ecuador are described and range extensions are documented for Alsophila esmeraldensis R.C. Moran and Cyathea macrocarpa (C. Presl) Domin.

TL;DR: Examination of a collection of Polychaeta from the Iranian coast of the Persian Gulf results in recognition of a new species of Owenia, namely O. persica sp.

TL;DR: The discovery of the phylogenetically isolated position of V. silvatica highlights the importance of the Western Ghats as a biodiversity hotspot rich in higher-level endemics.

TL;DR: The anatomy and aspects of brood protection of the African Pisidium reticulatum Kuiper, 1966 is studied in detail and Phylogenetic analyses based on a comprehensive set of morphological characters reveal Parapisidium as the most basal lineage within a clade Pisidium.

TL;DR: Two amber pieces with amphipods were studied, confirming the occurrence of the genus Synurella in Baltic amber and confirming the systematic position of the amphipod within the second amber piece is unclear.

TL;DR: An earthworm biodiversity survey of the Philippines has yielded 14 new species of the perichaetine megascolecid genus Pleionogaster, previously known from only a few species from scattered Philippine locations, demonstrated by their homogeneity within species reported here.

TL;DR: Flabellina verrucosa is polymorphic in ceratum length, and it is concluded that they belong to the same species.

TL;DR: Two new species of hyalellid amphipods, Hyalella crawfordi and H. gauthieri, are described from Lake Titicaca and the H. echinus group of species is newly proposed for these three species, and a group diagnosis is provided.

TL;DR: A new calliopiid amphipod is described from specimens sampled with a suprabenthic sled in the ‘Grande Vasiere’ area (northern Bay of Biscay) and can be distinguished from its sympatric congeners, A. bispinosa and A. ovalipes.

TL;DR: The most distinguishing feature of the new species is the robust, enlarged and specialised maxilliped, present in both sexes, which is similar in robustness and position to the highly specialisedmaxilliped in the laophontid genus Namakosiramia Ho & Perkins, 1977 the two members of which live as ectoparasites on holothurians.

TL;DR: Five new species of the Ochlesidae sensu stricto are described based on new material from inshore and continental-shelf Australian marine habitats, and both sexes show remarkable sexual dimorphism.

TL;DR: Six new species of the iphimediid amphipod genus Iphimedia are described, based on new material from inshore and continental shelf habitats, and four established species are redescribed.