1,721,017 research outputs found
A new sinistral turriform gastropod (Conoidea: Mangeliidae) from Taiwan
No full textThe examination of six specimens of a most peculiar sinistral turrid species from Taiwan housed at the Muséum National
d’Histoire Naturelle Paris (MNHN) led us to the recognition of a new species. These specimens resemble members of the
Oenopotinae Bogdanov, 1987 recently placed in the Mangeliidae P. Fischer, 1883 (Bouchet et al., 2011; Puillandre et al.,
2011). The distinct anal sinus and protoconch sculpture suggests it belongs to the genus Curtitoma Bartsch, 1941.
Unfortunately, no living specimen of the present species is available for anatomical, molecular, and radular examination.
Asami (1993) estimated that 99% of living Gastropod species are dextral. Most sinistral species are land and freshwater
pulmonates. The discovery of this sinistral species is of particular interest as it is the first sinistral species reported in the
family Mangeliidae
Crassispira (Crassispirella) tuckerana, a replacement name for Crassispira (Crassispirella) tuckeri Bonfitto & Morassi, 2004 (Gastropoda: Turridae: Crassispirinae) not Crassispira tuckeri Le Renard, 1994
No full textNote on a new name for Crassispira(Crassispirella) tuckeri Bonfitto & Morassi, 200
Taranidaphne dufresnei (Mollusca: Gastropoda: Turridae), new genus and species from Yemen, Red Sea
No full textBased on specimens from the Museo di Zoologia dell' Universitè di Bologna, Taranidaphne dufresnei gen. & sp. nov. is here described from Yemen, Red Sea and Gulf of Aden. The new genus is compared to Taranis Jeffreys, 1870, which it resembles mainly in apertural features. A total of four recent species are at present included in the genus. A redescription of Daphnella (Pleurotomella) amphitrites Melvill & Standen, 1903, and notes on Daphnella (Pleurotomella) nereïdum Melvill & Standen, 1903, species assigned to the new genus and originally described from the Gulf of Oman, are included. Bela erythraea Jousseaume, 1895, from Atacka, Suez, Red Sea, is here regarded as a synonym of Pleurotoma (Bela) hongkongensis Sowerby, 1888, from Hong Kong, a species also referred to Taranidaphne. The lectotype and a paralectotype of Bela erythraea are figured. A lectotype for Daphnella (Pleurotomella) amphitrites is designated and figured; syntypes of Pleurotoma (Bela) hongkongensis and Daphnella (Pleurotomella) nereïdum are figured for the first time
New Indo-Pacific species of Rimosodaphnella Cossmann, 1916 (Gastropoda: Conoidea): a genus of probable Tethyan origin
No full textThe genus Rimosodaphnella Cossmann, 1916 was proposed for Murex textile Brocchi, 1814, a European Miocene–
Pliocene species, and is sometimes thought to be represented in the recent fauna by three Atlantic species. Here, we
assign only one Atlantic species, Pleurotoma (Drillia) morra Dall, 1881 distributed from North Carolina to Southern
Brazil, to the genus and introduce three new species of Rimosodaphnella from the Indo-Pacific region. One, Rimosodaphnella
solomonensis, n. sp. from the Solomon Islands, while two others, Rimosodaphnella tenuipurpurata n. sp. and
Rimosodaphnella brunneolineata n. sp., from the Philippines Islands; these findings suggest that the genus may be well
represented in the Indo-Pacific region
Two new Horaiclavus (Horaiclavidae, Conoidea) species from the Indo-Pacific region
Full text linkBonfitto, Antonio, Morassi, Mauro (2014): Two new Horaiclavus (Horaiclavidae, Conoidea) species from the Indo-Pacific region. Zootaxa 3821 (1): 146-150, DOI: 10.11646/zootaxa.3821.1.1
Four new African turriform gastropods (Mollusca: Conoidea)
No full textMorassi, Mauro, Bonfitto, Antonio (2013): Four new African turriform gastropods (Mollusca: Conoidea). Zootaxa 3710 (3): 271-280, DOI: 10.11646/zootaxa.3710.3.
Austrodaphnella yemenensis new species (Gastropoda: Turridae) from Yemen, Red Sea, with notes on A. Alcestis (Melvill, 1906)
No full textThe genus Austrodaphnella Laseron, 1954, previously known only from Australian waters, is here reported from the Arabian Peninsula. Two species occur: A. yemenensis new species, from Yemen, Southern Red Sea, and A. alcestis (Melvill, 1906) new combination, a deep water species known only from the Gulf of Oman. SEM photographs of both species are provided
A new genus of indo-west pacific turridae (Gastropoda : Prosobranchia)
No full textVolume: 48Start Page: 136End Page: 14
Stroke in patients with COVID-19: Clinical and neuroimaging characteristics
No full textAcute cerebrovascular disease, particularly ischemic stroke, has emerged as a serious complication of infection by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the etiologic agent of the Coronavirus disease-2019 (COVID-19). Accumulating data on patients with COVID-19-associated stroke have shed light on specificities concerning clinical presentation, neuroimaging findings, and outcome. Such specificities include a propensity towards large vessel occlusion, multi-territory stroke, and involvement of otherwise uncommonly affected vessels. Conversely, small-vessel brain disease, cerebral venous thrombosis, and intracerebral hemorrhage appear to be less frequent. Atypical neurovascular presentations were also described, ranging from bilateral carotid artery dissection to posterior reversible encephalopathy syndrome (PRES), and vasculitis. Cases presenting with encephalopathy or encephalitis with seizures heralding stroke were particularly challenging. The pathogenesis and optimal management of ischemic stroke associated with COVID-19 still remain uncertain, but emerging evidence suggest that cytokine storm-triggered coagulopathy and endotheliopathy represent possible targetable mechanisms. Some specific management issues in this population include the difficulty in identifying clinical signs of stroke in critically ill patients in the intensive care unit, as well as the need for a protected pathway for brain imaging, intravenous thrombolysis, and mechanical thrombectomy, keeping in mind that “time is brain” also for COVID-19 patients. In this review, we discuss the novel developments and challenges for the diagnosis and treatment of stroke in patients with COVID-19, and delineate the principles for a rational approach toward precision medicine in this emerging field
How many native Cerithium species in the Mediterranean Sea? An integrative taxonomic approach
No full textSpecies are fundamental units in evolutionary biology. However, defining them in taxonomically
problematic groups requires integration of independent sources of information in order to develop
robust hypotheses for taxonomic classification. Here, we propose an integrative framework for species
delimitation in the Mediterranean species of the genus Cerithium (Caenogastropoda: Cerithiidae),
whose shells show a wide variety of forms resulting in problematic morphological identification at the
species level. Combined sequence data of two mitochondrial genes (COIþ12S) for 55 individuals from
the central Mediterranean Sea were used to test the species status of six identified morphotypes.
Phylogenetic analyses, as well as DNA-based methods of species delimitation (automatic barcode
gap discovery, species delimitation plugin and genealogical sorting index), support the species status
of three morphotypes (C. vulgatum 1⁄4 MOTU-A, C. alucastrum 1⁄4 MOTU-B and C. protractum 1⁄4
MOTU-C), sometimes considered as ecotypes. Molecular operational taxonomic unit (MOTU)-D
includes large individuals morphologically assigned to C. vulgatum (from Brindisi and Oristano) and C.
repandum (from Tunisia), but all probably represent C. repandum which, if valid, would then not be
endemic to its type locality in the Gulf of Gabe` s. All individuals identified as C. lividulum grouped in
MOTU-E, except those from Tunisia which cluster in MOTU-F with some C. renovatum. Cerithium renovatum
from Crete forms an endemic group (MOTU-G), suggesting a possible cryptic species. Our
results show only partial concordance between traditional morphology and sequence data, indicating
that the former is not always sufficient for recognizing species level taxa within Mediterranean
Cerithium, although protoconch morphology is a key feature for distinguishing between species with
superficially similar teleoconchs. Further analyses based on more comprehensive geographic sampling
and more mitochondrial markers, and including a number of nuclear loci, are needed to clarify
Mediterranean Cerithium diversity more fully
- …
