Search results for "Pulchella"
showing 6 items of 6 documents
Data from: Phylogenomics of Lophotrochozoa with consideration of systematic error
2021
Phylogenomic studies have improved understanding of deep metazoan phylogeny and show promise for resolving incongruences among analyses based on limited numbers of loci. One region of the animal tree that has been especially difficult to resolve, even with phylogenomic approaches, is relationships within Lophotrochozoa (the animal clade that includes molluscs, annelids, and flatworms among others). Lack of resolution in phylogenomic analyses could be due to insufficient phylogenetic signal, limitations in taxon and/or gene sampling, or systematic error. Here, we investigated why lophotrochozoan phylogeny has been such a difficult question to answer by identifying and reducing sources of sys…
Data from: Phylogenomics of Lophotrochozoa with consideration of systematic error
2016
Phylogenomic studies have improved understanding of deep metazoan phylogeny and show promise for resolving incongruences among analyses based on limited numbers of loci. One region of the animal tree that has been especially difficult to resolve, even with phylogenomic approaches, is relationships within Lophotrochozoa (the animal clade that includes molluscs, annelids, and flatworms among others). Lack of resolution in phylogenomic analyses could be due to insufficient phylogenetic signal, limitations in taxon and/or gene sampling, or systematic error. Here, we investigated why lophotrochozoan phylogeny has been such a difficult question to answer by identifying and reducing sources of sys…
Drilling predation on Gryphus vitreus (Brachiopoda) off the French Mediterranean coasts
2004
Abstract A total of 145 valves of Gryphus vitreus with naticid drillholes have been recorded from samples during 21 cruises in the Northwestern Mediterranean, out of about 30,000 empty valves. Drilling was lower than 1% in all stations, except in one station where it reached up to 25.5%. Selectivity of drillhole site by the naticid Euspirella pulchella seems to apply in G. vitreus as drillholes are mainly concentrated in the relatively meaty distal half of the shell, which is also the thickest part of the valve (about 0.6–2 mm). Attacks occur generally on the ventral valve (86.2%) according to the life position of Gryphus. The predation pressure on G. vitreus by drilling appears exceptional…
Orthotrichum mazimpakanum sp. nov. and O. anodon (Orthotrichaceae), two similar species from California
2011
Abstract Studies of herbarium samples and field surveys in Southern California during the fall of 2008 led to the discovery of several new collections of mosses lacking exostome teeth belonging to Orthotrichum Hedw. subgenus Pulchella (Schimp.) Vitt. Some of them are ascribable to O. anodon F. Lara, Garilleti & Mazimpaka even though they display a set of characters not noticed before, considerably broadening the morphological variability of this species and making necessary an updated description. Other materials, from scattered localities along a wide latitudinal range, correspond to a here described new species, Orthotrichum mazimpakanum Garilleti & F. Lara, differentiated by a set of una…
Orthotrichum anodon (Orthotrichaceae), a new species from California, and its relationships to otherOrthotrichawith puckered capsule mouths
2006
A new Orthotrichum species, O. anodon F. Lara, Garilleti & Mazimpaka, is described. The new taxon is included in subgenus Pulchella (Schimp.) Vitt, and is characterised by its immersed, cylindrical capsules, with eight short exothecial bands that constrict the capsule mouth when dry; the lack of exostome teeth; the endostome having 16 hyaline and papillose segments; and the leaves lingulate to ovate lanceolate, with obtuse apices. Its distinction from and relationships with similar species within the genus, are discussed.
A peculiar new Orthotrichum species (Orthotrichaceae, Bryopsida) from central Argentina
2007
A new epiphytic Orthotrichum species (Orthotrichum spiculatum F. Lara, Garilleti & Mazimpaka sp. nov.) is described from the sierra of Cordoba (Argentina). The new species has most of the characteristics of subgenus Pulchella (Schimp.) Vitt, but it is unique because of having eight exostome teeth pairs and 16 broad, strongly papillose endostome segments. Additionally, its upper leaves have green, acuminate, dentate–spiculate apices. © 2007 The Linnean Society of London, Botanical Journal of the Linnean Society, 2007, 155, 477–482.