scholarly journals Esclarecimiento taxonómico de Nymphaea gracilis Zucc., planta acuática endémica de México

2017 ◽  
pp. 85
Author(s):  
Alejandro Novelo-R.
Keyword(s):  
South America ◽  
Leaf Surface ◽  
Leaf Shape ◽  
Lower Leaf Surface ◽  
Altitudinal Distribution ◽  
Type Specimens ◽  
Taxonomic History ◽  
History Of ◽  
Mexican Species ◽  
Surface Angle

A review of the taxonomic history of Nymphaea ampla (Salisb.) DC. is presented, since its description by Salisbury in 1805 up to the present, including the mention of various names which have been incorrectly referred to this taxon as synonyms, most notably Nymphaea gracilis Zucc. N. gracilis is easily distinguished from N. ampla, the only other Mexican species with which it might be confused, by several-morphological and field characters, namely: the margin of the leaf, shape of the rhizome, venation of the lower leaf surface, angle of aperture of the sepals, and altitudinal distribution . The results of this research lead us to the conclusion that N. ampla var. speciose (Mart. & Zucc.) Casp . is restricted at present to the Antilles and South America. The confusion created by Conard's work (1905) widening the range of this variety to temperate Mexico, by the inclusion of N. gracilis and N. undulata under this variety, has been clarified. Comparison of descriptions and type specimens of various Nymphaeas, which were involved in the problem, such as N. gracilis Zucc., N. flavo-virens Lehm. , N. undulate Lehm. , and N. tussilagifolia Lehm., indicates that all of them belong to the same species. Applying the rule of priority, the correct name which should be used for this plant is N. gracilis Zucc.

Synchrotron micro-CT scanning leads to the discovery of a new genus of morphologically conserved echinoid (Echinodermata: Cassiduloida)

Zootaxa ◽  
2018 ◽  
Vol 4457 (1) ◽  
pp. 70 ◽  
Author(s):  
CAMILLA SOUTO ◽  
LUCIANA MARTINS
Keyword(s):  
New Genus ◽  
Ct Scanning ◽  
Morphological Data ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Type Specimens ◽  
Bathymetric Range ◽  
Taxonomic History ◽  
History Of ◽  
A New Species

Here we use synchrotron radiation-based micro-computed tomography (SRµCT) images of type specimens to confidently place Cassidulus malayanus in a new genus (Kassandrina gen. nov.) that would not have been discovered with traditional techniques, and to describe a new species of Cassidulus (Cassidulus briareus sp. nov.) from Australia and designate a neotype for Cassidulus caribaearum. We also provide remarks describing the taxonomic history of each taxon and a diagnostic table of all living cassidulid species, and extend the known geographic and bathymetric range of C. caribaearum and C. malayanus. Besides rendering novel morphological data, the SRµCT images provide significant insights in the evolution of bourrelets of these cassiduloid echinoids.

scholarly journals Unraveling the diversification history of grasshoppers belonging to the “Trimerotropis pallidipennis”(Oedipodinae: Acrididae) species group: a hotspot of biodiversity in the Central Andes

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3835 ◽  
Author(s):  
Noelia Verónica Guzmán ◽  
Silvia Mónica Pietrokovsky ◽  
Maria Marta Cigliano ◽  
Viviana Andrea Confalonieri
Keyword(s):  
South America ◽  
Central Andes ◽  
Species Group ◽  
Climatic Conditions ◽  
Andes Mountains ◽  
Mountain Range ◽  
Altitudinal Distribution ◽  
Climatic Fluctuations ◽  
Genetic Lineages ◽  
History Of

The Andean Mountain range has been recognized as one of the biodiversity hotspots of the world. The proposed mechanisms for such species diversification, among others, are due to the elevation processes occurring during the Miocene and the intensive glacial action during the Pleistocene. In this study we investigated the diversification history of the grasshopperTrimerotropis pallidipennisspecies complex which shows a particularly wide latitudinal and altitudinal distribution range across the northern, central and southern Andes in South America. Many genetic lineages of this complex have been so far discovered, making it an excellent model to investigate the role of the central Andes Mountains together with climatic fluctuations as drivers of speciation. Phylogenetics, biogeographic and molecular clock analyses using a multi-locus dataset revealed that in Peru there are at least two, and possibly four genetic lineages. Two different stocks originated from a common ancestor from North/Central America—would have dispersed toward southern latitudes favored by the closure of the Panama Isthmus giving rise to two lineages, the coastal and mountain lineages, which still coexist in Peru (i.e.,T. pallidipennisandT. andeana). Subsequent vicariant and dispersal events continued the differentiation process, giving rise to three to six genetic lineages (i.e., clades) detected in this study, which were geographically restricted to locations dispersed over the central Andes Mountains in South America. Our results provide another interesting example of “island diversification” motored by the topography plus unstable climatic conditions during the Pleistocene, pointing out the presence of a hotspot of diversification in the Andean region of Peru.

scholarly journals Taxonomic note on the type species of Centris (Melanocentris) (Hymenoptera: Apidae)

2018 ◽  
pp. 1-6
Author(s):  
Felipe Vivallo
Keyword(s):  
Type Species ◽  
Critical Study ◽  
Type Specimens ◽  
Taxonomic Note ◽  
Number Of Species ◽  
New Subgenus ◽  
Taxonomic History ◽  
History Of ◽  
New Synonymy

Centris (Melanocentris) Friese is one of many subgenera that have been proposed throughout the taxonomic history of the bee genus Centris Fabricius.  The lack of critical study of the type specimens of its type species, Centris atra Friese, resulted in the synonymy of Melanocentris with subgenus Ptilotopus Klug.  Subsequently, Melacentris Moure was described as a new subgenus to group the large number of species identified as Melanocentris before the synonymy was proposed.  The study of the syntypes of C. atra and the designation of a lectotype (herein) leads to the revalidation of Melanocentris as a subgenus distinct from Ptilotopus, and necessitates the new synonymy of Melacentris with Melanocentris.

scholarly journals On the history and type specimens of the Cape Verde Cane Warbler Acrocephalus brevipennis (Keulemans, 1866) (Aves, Sylviidae)

1993 ◽  
Vol 62 (4) ◽  
pp. 249-253 ◽  
Author(s):  
C.J. Hazevoet
Keyword(s):  
Present Status ◽  
Type Specimen ◽  
Cape Verde ◽  
Type Specimens ◽  
Original Series ◽  
Taxonomic History ◽  
History Of

The Cape Verde Cane Warbler Acrocephalus brevipennis was first described in 1866, and again in 1871 and 1883. These descriptions were all made after specimens from the same series. A type specimen was never designated and only one syntype from the original series can be traced today. The taxonomic history of the species is discussed and the single remaining syntype described. The present status and distribution of the species are briefly discussed.

scholarly journals The lower actinopterygian fauna from the Lower Carboniferous Albert shale formation of New Brunswick, Canada – a review of previously described taxa and a description of a new genus and species

Fossil Record ◽  
2017 ◽  
Vol 20 (1) ◽  
pp. 47-67 ◽  
Author(s):  
Kathryn E. Mickle
Keyword(s):  
New Brunswick ◽  
New Genus ◽  
New Genus And Species ◽  
Type Specimens ◽  
Lower Carboniferous ◽  
Taxonomic History ◽  
Dorsal Ridge ◽  
History Of ◽  
Shale Formation ◽  
Being Moved

Abstract. The Lower Carboniferous Albert shale formation of New Brunswick, Canada, is well-known for the preservation of countless articulated lower actinopterygian palaeoniscoid fishes. This site is at the boundary between the Devonian and the Lower Carboniferous, making the lower actinopterygians preserved at this site important. The taxonomic history of previously described Albert shale formation actinopterygians is reviewed here. Many of the earliest described actinopterygian taxa from the Albert Formation are represented by poorly preserved type specimens and have the distinction of being moved from one paraphyletic genus to another paraphyletic genus. While these taxa are in need of major redescriptions, such work is premature until the large paraphyletic or polyphyletic genera they have been placed in, Palaeonicus[m], †Rhadinichthys, and †Elonichthys, are redescribed. But there is new diversity within the Albert shale formation. Here, a new lower actinopterygian species, †Lambeia pectinatus, is described from one well-preserved specimen. This new species is characterized by dorsal ridge scales with pectinated posterior margins, body scales inserted between adjacent dorsal ridge scales, body scales with pectinated posterior and ventral margins, the presence of a ventral rostro-premaxilla and a median rostral bone, a separate and distinct antorbital bone, and a single supraorbital bone. This newly described species is distinct from previously described fishes from the Albert Formation, and the morphology of this newly described species is more similar to later Carboniferous fishes rather than Devonian fishes. This suggests that morphological features commonly seen in Carboniferous fishes and rarely seen in Devonian fishes were present early in the Carboniferous.

Eriophyoid mites associated with the blackberry in Brazil—a new species in the genus Diptacus Keifer 1951 (Diptilomiopidae) and first report and supplementary description of Acalitus orthomerus (Keifer, 1951) (Eriophyidae)

2018 ◽  
Vol 23 (6) ◽  
pp. 1199 ◽  
Author(s):  
Claudia Teresita Olmedo Trinidad ◽  
Mércia Elias Duarte ◽  
Uemerson Silva Da Cunha ◽  
Denise Navia
Keyword(s):  
New Species ◽  
South America ◽  
Leaf Surface ◽  
Lower Leaf Surface ◽  
First Report ◽  
Eriophyoid Mites ◽  
Morphological Differences ◽  
First Time ◽  
A New Species ◽  
South Brazil

A new vagrant species of Diptilomiopidae mite, in the Diptacus Keifer, 1951 genus, namely Diptacus rubuscolum sp. nov., living on the lower leaf surface of blackberry-Rubus sp. (Rosaceae) in South Brazil, is described and illustrated. In addition, Acalitus orthomerus Keifer, 1951, for the first time reported in Brazil and even in South America; a supplementary description of this species is presented based on females, males and immature specimens associated to the drupelets. Main morphological differences distinguishing the new Diptacus species and A. orthomerus species from those belonging to the same genera or morphologically similar also associated with Rubus are presented.

Animal taxa named for Rollo H. Beck

2014 ◽  
Vol 41 (1) ◽  
pp. 113-123 ◽  
Author(s):  
Gary M. Fellers
Keyword(s):  
Natural History ◽  
South America ◽  
Southern California ◽  
American Museum ◽  
Type Specimens ◽  
California Academy ◽  
Vertebrate Zoology ◽  
The Caribbean ◽  
Set Up ◽  
Academy Of Sciences

Rollo Howard Beck (1870–1950) was a professional bird collector who spent most of his career on expeditions to the Channel Islands off southern California, the Galápagos Islands, South America, the South Pacific, and the Caribbean. Some of the expeditions lasted as long as ten years during which time he and his wife, Ida, were often working in primitive conditions on sailing vessels or camps set up on shore. Throughout these expeditions, Beck collected specimens for the California Academy of Sciences, the Museum of Vertebrate Zoology at Berkeley (California), the American Museum of Natural History, and the Walter Rothschild Museum at Tring, England. Beck was one of the premier collectors of his time and his contributions were recognized by having 17 taxa named becki in his honor. Of these taxa, Beck collected 15 of the type specimens.

Charles Waterton (1782–1865) and wourali

2017 ◽  
Vol 44 (1) ◽  
pp. 122-129 ◽  
Author(s):  
A. Padfield
Keyword(s):  
South America ◽  
British Guiana ◽  
History Of

Charles Waterton was the eccentric “Lord of Walton Hall” near Wakefield in Yorkshire. His Wanderings in South America was first published in 1826; translated into French, German and Spanish, it was a best seller. He brought back wourali used by the Macoushi natives of British Guiana (now Guyana) for killing prey; there is a piece of it in the Wakefield Museum. This paper traces the history of wourali which paralyses its victims; its attempted medical use for rabies and tetanus and, though different from curare, its belated use in modern anaesthesia.

“What Freedom?”

2019 ◽  
Vol 74 (3) ◽  
pp. 305-331
Author(s):  
John Owen Havard
Keyword(s):  
South America ◽  
French Revolution ◽  
The Political ◽  
The Novel ◽  
Free Condition ◽  
Narrative Design ◽  
Economic Liberalism ◽  
History Of ◽  
Ways Of Thinking ◽  
John Owen

John Owen Havard, “‘What Freedom?’: Frankenstein, Anti-Occidentalism, and English Liberty” (pp. 305–331) “If he were vanquished,” Victor Frankenstein states of his monstrous creation in Mary Shelley’s Frankenstein (1818), “I should be a free man.” But he goes on: “Alas! what freedom? such as the peasant enjoys when his family have been massacred before his eyes, his cottage burnt, his lands laid waste, and he is turned adrift, homeless, pennyless, and alone, but free.” Victor’s circumstances approximate the deracinated subject of an emergent economic liberalism, while looking to other destitute and shipwrecked heroes. Yet the ironic “freedom” described here carries an added charge, which Victor underscores when he concludes this account of his ravaged condition: “Such would be my liberty.” This essay revisits the geographic plotting of Frankenstein: the digression to the East in the nested “harem” episode, the voyage to England, the neglected episode of Victor’s imprisonment in Ireland, and the creature’s desire to live in South America. Locating Victor’s concluding appeal to his “free” condition within the novel’s expansive geography amplifies the political stakes of his downfall, calling attention to not only his own suffering but the wider trail of destruction left in his wake. Where existing critical accounts have emphasized the French Revolution and its violent aftermath, this obscures the novel’s pointed critique of a deep and tangled history of English liberty and its destructive legacies. Reexamining the novel’s geography in tandem with its use of form similarly allows us to rethink the overarching narrative design of Frankenstein, in ways that disrupt, if not more radically dislocate, existing rigid ways of thinking about the novel.

Sign in / Sign up

Export Citation Format

Share Document