Fifteen species of the darkling beetle genus Pimelia (Tenebrionidae: Coleoptera) have been sequenced for a 365 b.p. portion mitochondrial Cytochrome Oxidase I gene. Thirteen these are endemic inhibiting Canarian archipelago in Atlantic and other two continental conspecifics. This data set has phylogenetically analysed by maximum parsimony distance approaches resulting trees used to deduce sequential interisland colonization. suggests patterns compatible with geological dating islands, but...

A microorganism which reduces Fe(III) during the fermentation of glucose was isolated from freshwater sediment. The supplied to enrichment cultures as a soluble complex with bidentate ligand maltol (3-hydroxy-2-methyl-4-pyrone). Advantages that were afforded by use Fe(III)(maltol)3 over previously published methods included negation requirement for assays Fe(II) formation. Because has characteristic deep red colour, reduction could be quantified spectrophotometrically monitoring...

Comparative mitochondrial genomic analyses are rare among crustaceans below the family or genus level. The obliged subterranean crustacean amphipods of Metacrangonyctidae, found from Hispaniola (Antilles) to Middle East, including Canary Islands and peri-Mediterranean region, have an evolutionary history peculiar biogeography that can respond Tethyan vicariance. Indeed, recent phylogenetic analysis using all protein-coding sequences one nuclear ribosomal gene lent support this hypothesis...

Abstract Cave shrimps from the genera Typhlatya , Stygiocaris and Typhlopatsa (Atyidae) are restricted to specialised coastal subterranean habitats or nearby freshwaters have a highly disconnected distribution (Eastern Pacific, Caribbean, Atlantic, Mediterranean, Madagascar, Australia). The combination of wide limited dispersal potential suggests large-scale process has generated this geographic pattern. Tectonic plates that fragment ancestral ranges (vicariance) often been assumed cause...

The relative amount of C-banded heterochromatin varies strikingly in seven species tenebrionid beetles, from 25 to 58%, but most show procentric bands only. Nevertheless, Gonocephalum patruele exhibits an almost completely heterochromatic X chromosome. nuclear DNA content Feulgen-stained spermatids has yielded up a threefold difference, 0.27 0.86 pg, which is not accordance with the heterochromatin. However, genome sizes correlate significantly total chromosome areas at metaphase I and...

Abstract Background The amphipod crustacean Palmorchestia hypogaea occurs only in La Palma (Canary Islands) and is one of the few terrestrial amphipods world that have adapted to a strictly troglobitic life volcanic cave habitats. A surface-dwelling closely related species ( epigaea ) lives humid laurel forest on same island. Previous studies suggested an ancestral littoral Orchestia colonized forests subsequent drought episodes Canaries reduced distribution P. favouring colonization lava...

Abstract Aim Our aim was to produce a dated phylogeny of Typhlatya , stygobiont shrimp genus with an extremely disjunct localized distribution across the Mediterranean, central Atlantic and eastern Pacific. Using phylogenetic analyses, we examine role dispersal plate tectonics in determining its distribution. Location Western Ascension Island, Bermuda, Bahamas, Yucatán, Caribbean, Galápagos, Australia. Methods Thirteen 17 species were analysed, using Stygiocaris Halocaridina Antecaridina as...

<ns4:p>We present a genome assembly of <ns4:italic>Tethysbaena scabra</ns4:italic> (Arthropoda; Crustacea; Malacostraca; Eumalacostraca; Peracarida; Thermosbaenacea; Monodellidae), species endemic to Mallorca, Spain. The size is 1.18 gigabases that scaffolded into 17 chromosomes plus mitochondrial 16,5 kilobases in length.</ns4:p>

Abstract The Timarcha goettingensis complex is a monophyletic assemblage of closely related leaf beetles (Chrysomelidae), distributed from the north half Iberian Peninsula to Central Europe. Oligophagy, mountainous habitat and apterism are factors which assumed promote speciation in these beetles. We have used cytochrome oxidase subunit II mitochondrial DNA genealogies obtained 31 sampling localities nested geographical distance analysis assess population structure demographic explaining...

The volcanic island of Tenerife (Canary archipelago) was formerly covered at 600-1200 m above sea level on most its northern side by a cloud forest holding much the endemic insect fauna. In significant surviving patches this laurel eastern and western tips occur two forest-specialist, closely related species Eutrichopus (Coleoptera, Carabidae); here we present data mitochondrial DNA variation among populations these species. total, 116 individuals from 16 localities were sampled 638 bp...

Summary Eight species of Tribolium and the related Alphitobius diaperinus have been microdensitometrically analysed by measuring nuclear content (1C value) their Feuigenstained spermatids. The range mean genome sizes goes from 0·157 pg in T. audax to 0·388 brevicornis , including five significantly different groups values. Also, ail but one significant intraspecific heterogeneity size was found. resemblances are not generally correlated with genetic homologies among species, there is a...

Metazoan mitochondrial genomes usually consist of the same gene set, but some taxonomic groups show a considerable variety in order and nucleotide composition. The 37 crustaceans are currently known. Within malacostracan superorder Peracarida, only three partial mitogenome sequences complete sequence Ligia oceanica (Isopoda) available. Frequent translocation events have changed crustaceans, providing an opportunity to study patterns mechanisms rearrangement determine their impact on...

Abstract Background Metacrangonyctidae (Amphipoda, Crustacea) is an enigmatic continental subterranean water family of marine origin (thalassoid). One the species in genus, Metacrangonyx longipes , endemic to Balearic islands Mallorca and Menorca (W Mediterranean). It has been suggested that distribution thalassoid crustaceans could be explained by one two alternative hypotheses: (1) active colonization inland freshwater aquifers a ancestor, followed adaptative shift; or (2) passive...

We investigated the phylogeography of Hegeter politus, a saprophagous, flightless darkling beetle endemic to eastern Canary Islands, using fragment mitochondrial COI gene. Distance and parsimony based gene trees mitotypes identified revealed striking association between mitotype clades sampling locations. The branching order suggested that colonization islands by politus proceeded from southern part Fuerteventura in north–northeast direction Lanzarote smaller islands. Based on this, scenario...

A large number of repeats a satellite DNA (stDNA) family have been cloned and sequenced from species populations the genus Pimelia (Tenebrionidae, Coleoptera). The beetles were collected in Canary Islands, Morocco, Iberian Peninsula, Balearic Islands order to analyze evolutionary forces processes acting on abundant stDNAs conserved at level. This repetitive is composed an A-T-rich stDNA, with basic units 357 bp. All sequences obtained showed similarity 22 repeat PIM357 stDNA described...