A HISTORY OF DIVERSIFICATION, EXTINCTION, AND INVASION IN TROPICAL AMERICA AS DERIVED FROM SPECIES-LEVEL PHYLOGENIES OF CHIONINE GENERA (FAMILY VENERIDAE)

2001 ◽  
Vol 75 (3) ◽  
pp. 644-657 ◽  
Author(s):  
PETER D. ROOPNARINE
Keyword(s):  
Species Level ◽  
Tropical America ◽  
History Of

A history of diversification, extinction, and invasion in tropical America as derived from species-level phylogenies of chionine genera (Family Veneridae)

2001 ◽  
Vol 75 (3) ◽  
pp. 644-657 ◽  
Author(s):  
Peter D. Roopnarine
Keyword(s):  
Species Level ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
Western Atlantic ◽  
Early Oligocene ◽  
Tropical America ◽  
History Of ◽  
Extinction Events ◽  
Fossil Records

Phylogenetic reconstructions of two tropical American venerid genera, Chione and Chionopsis (subfamily Chioninae) were attempted at the species-level. The purposes of the analyses were to provide historical reconstructions of origination and extinction events in the two clades, as well as patterns of invasion and diversification. The analyses were based entirely on conchological characters to facilitate the inclusion of a substantial number of fossil taxa, but difficulties were encountered due to the quality of preservation and availability of material. Nevertheless the two genera were established as monophyletic clades, and the reconstructions yielded considerable insight into their histories in tropical America. The analyses suggest that both genera originated in the tropical western Atlantic, Chionopsis by at least the early Oligocene, and Chione in the early Miocene. Various branches of both genera subsequently invaded the tropical eastern Pacific several times prior to Seaway closure, with only one possible reciprocal invasion of the western Atlantic. Pliocene extinction affected both genera more significantly in the western Atlantic relative to the eastern Pacific, and diversity is higher today in the latter region. These conclusions are not entirely consistent with the fossil records of the genera, but this incongruency highlights the need for much more extensive sampling of the eastern Pacific Cenozoic record.

A history of diversification, extinction, and invasion in tropical America as derived from species-level phylogenies of chionine genera (Family Veneridae)

2001 ◽  
Vol 75 (5) ◽  
pp. 644-657
Author(s):  
Peter D. Roopnarine
Keyword(s):  
Species Level ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
Western Atlantic ◽  
Early Oligocene ◽  
Tropical America ◽  
History Of ◽  
Extinction Events ◽  
Fossil Records

Phylogenetic reconstructions of two tropical American venerid genera, Chione and Chionopsis (subfamily Chioninae) were attempted at the species-level. The purposes of the analyses were to provide historical reconstructions of origination and extinction events in the two clades, as well as patterns of invasion and diversification. The analyses were based entirely on conchological characters to facilitate the inclusion of a substantial number of fossil taxa, but difficulties were encountered due to the quality of preservation and availability of material. Nevertheless the two genera were established as monophyletic clades, and the reconstructions yielded considerable insight into their histories in tropical America. The analyses suggest that both genera originated in the tropical western Atlantic, Chionopsis by at least the early Oligocene, and Chione in the early Miocene. Various branches of both genera subsequently invaded the tropical eastern Pacific several times prior to Seaway closure, with only one possible reciprocal invasion of the western Atlantic. Pliocene extinction affected both genera more significantly in the western Atlantic relative to the eastern Pacific, and diversity is higher today in the latter region. These conclusions are not entirely consistent with the fossil records of the genera, but this incongruency highlights the need for much more extensive sampling of the eastern Pacific Cenozoic record.

El Papel de Humbodt en el Origen y Desarrollo de la Geografia Moderna

GEOgraphia ◽  
2009 ◽  
Vol 4 (8) ◽  
pp. 7
Author(s):  
Héctor F. Rucinque e Wellington Jiménez
Keyword(s):  
Key Words ◽  
Founding Father ◽  
Analytical Methodology ◽  
Alexander Von Humboldt ◽  
Scientific Exploration ◽  
History Of Geography ◽  
Tropical America ◽  
History Of ◽  
Scholarly Production ◽  
Modern Geography

RESUMO Por lo general, los historiadores de la ciencia reconocen la importaocia de Alexander von Humboldt en el desarrollo de la geografía moderna, si bien tal contribución especializada no es claramente desglosada de su multifacética producción científica. Con ocasión del bicentenario de su viaje a la América tropical, el papel de Humboldt en la formulación de las bases de una metodología analítica para la investigación geográfica, y su monumental trabajo sustantivo, lo mismo que su penetrante permanencia e inspiración en la tradición geográfica, deben acreditarse como justificación amplia y suficiente para su título de padre fundador de la geografía científica. Epígrafes: Humboldt, historia de la geografía, geografía moderna, metodología geográfica, exploración científica.ABSTRACT Alexander von Humboldt’s contributions to the development of modern geography are generally ackoowledged by historians of science, though not always stated precisely out of his many-sided scholarly production. On the occasion of the Bicentennial of his voyage to tropical America, Humboldt’s role in setting forth the foundation of an analytical methodology for geography as well as for his monumental substantive work, along with his pervasive and inspiring perrnanence in the geographical tradition, must be recognized as ample justification tu his title as founding father of scientific geography. Key words: Humboldt, history of geography, modern geography, geagraphical methodology, scientific exploration.

Molecular Phylogeny of the Notomicrine Water Beetles (Coleoptera: Noteridae) Reveals Signatures of Gondwanan Vicariance and Ecological Plasticity

2020 ◽  
Vol 4 (6) ◽  
Author(s):  
Stephen M Baca ◽  
Andrew E Z Short
Keyword(s):  
New World ◽  
Mitochondrial Gene ◽  
Species Level ◽  
Divergence Times ◽  
Undescribed Species ◽  
Water Beetles ◽  
Old World ◽  
Ecological Plasticity ◽  
History Of ◽  
Species Groups

Abstract Notomicrinae (Coleoptera: Noteridae) is a subfamily of minute and ecologically diverse aquatic beetles distributed across the Southeast Asia, Oceania, and the Americas. We investigate the evolution of Notomicrinae and construct the first species-level phylogeny within Noteridae using five nuclear and mitochondrial gene fragments. We focus on the genus Notomicrus Sharp (Coleoptera: Noteridae), sampling 13 of the 17 known Notomicrus species and an additional 11 putative undescribed species. We also include Phreatodytes haibaraensis Uéno (Coleoptera: Noteridae). Datasets are analyzed in Maximum Likelihood and Bayesian frameworks. With these, we 1) estimate divergence times among notomicrine taxa and reconstruct the biogeographical history of the group, particularly testing the hypothesis of Gondwanan vicariance between Old World and New World Notomicrus; 2) additionally, we assess ecological plasticity within Notomicrinae in the context of the phylogeny; and 3) finally, we test the monophyly of tentative species groups within Notomicrus and place putative new taxa. We recover a monophyletic Notomicrinae, with Phreatodytes sister to Notomicrus. We estimate the crown age of Notomicrinae to be ca. 110 Mya. The crown age of Notomicrus is recovered as ca. 75 Mya, there diverging into reciprocally monophyletic Old and New World clades, suggesting Gondwanan vicariance. Our phylogenetic estimate indicates a strong degree of ecological plasticity within Notomicrinae, with habitat switching occurring in recently diverging taxa. Finally, we recover five main species groups in Notomicrus, one Old World, Four New World, with tentative affirmation of the placement of undescribed species.

A new species of Australian freetail bat Mormopterus eleryi sp. nov. (Chiroptera: Molossidae) and a taxonomic reappraisal of M. norfolkensis (Gray)

Zootaxa ◽  
2008 ◽  
Vol 1875 (1) ◽  
pp. 1 ◽  
Author(s):  
TERRY REARDON ◽  
MARK ADAMS ◽  
NORM MCKENZIE ◽  
PAULINA JENKINS
Keyword(s):  
New Species ◽  
Species Level ◽  
Glans Penis ◽  
Museum Specimens ◽  
Echolocation Call ◽  
Norfolk Island ◽  
History Of ◽  
Central Australia ◽  
The Relationship ◽  
A New Species

The species-level taxonomy of Australian Mormopterus has a long history of uncertainty. In this paper we review in detail the historic problems associated with determining the relationship between the norfolkensis holotype (allegedly from Norfolk Island) and forms occurring on mainland Australia. Using external and cranial characters, we establish that the holotype is conspecific with mainland specimens and we provide a redescription of the species. We also describe a new species, Mormopterus eleryi sp. nov. from central Australia. Updated allozyme profiles (a total of 40 putative loci) show that M. norfolkensis and M. eleryi sp. nov. diverge from one another at an average of 49% fixed differences and each diverge from the ‘planiceps-beccarii-loriae’ complex at an average of 48% and 45% fixed differences respectively. While both species are readily diagnosable by external and cranial features, they are especially distinctive in the morphology of the upper molars and glans penis. Echolocation call profiles as recorded by ANABAT bat detectors also show both species to have unique search phase calls compared to other Australian Mormopterus species. Both M norfolkensis and M. eleryi sp. nov. are known from less than 30 museum specimens each.

scholarly journals Rudolf Schlechter's South-American orchids I. Historical and bibliographical background

Lankesteriana ◽  
2019 ◽  
Author(s):  
Carlos Ossenbach ◽  
Rudolf Jenny
Keyword(s):  
South America ◽  
Key Words ◽  
Historical Background ◽  
South American ◽  
Individual Country ◽  
History Of Botany ◽  
Tropical America ◽  
History Of ◽  
Flora Of South America ◽  
Complete Bibliography

This study represents the first part of a series dedicated to the work of Rudolf Schlechter on the orchid flora of South America. The historical background of Schlechter’s botanical activity is outlined, and salient aspects of his biography, as well as his main scientific relationships, in particular with Oakes Ames, and the origins of his interest in tropical America are discussed. We also present a complete bibliography relative to Schlechter’s production on the orchid floras of South American countries, with his network of orchid collectors, growers and other purveyors, and checklists of all the new taxa that he described from each individual country.   Key words: bibliography, biography, history of botany, Orchidaceae, South America

scholarly journals Taxonomy and Natural History of the Crematogaster (Decacrema)-group (Hymenoptera: Formicidae) in Madagascar

Zootaxa ◽  
2019 ◽  
Vol 2714 (1) ◽  
pp. 1 ◽  
Author(s):  
BONNIE B. BLAIMER
Keyword(s):  
Natural History ◽  
Species Identification ◽  
Species Complex ◽  
Taxonomic Status ◽  
Distinct Species ◽  
Species Level ◽  
Species Status ◽  
Distribution Maps ◽  
History Information ◽  
History Of

The taxonomy of the Malagasy Crematogaster (Decacrema) is revised and a total of six distinct species and one species-complex are recognized. Malagasy Decacrema are widespread ants in Madagascar that nest almost exclusively arboreally, either in carton nests or inside dead twigs or branches, and often tend Coccoidea. Four species are newly described here: Crematogaster mahery sp. nov., C. malala sp. nov., C. sabatra sp. nov. and C. sisa sp. nov.. The species status of Crematogaster grevei Forel 1891 is confirmed by the study, and one described subspecies, C. hova nosibeensis Forel 1891 is raised to species level (C. nosibeensis stat. nov.) and a neotype designated. Crematogaster hova latinoda Forel 1891 is synonymised under C. hova Forel 1887, and the taxonomic status of C. hova, C. ensifera Forel 1910 and C. schencki Forel 1891 is further investigated, but could not be resolved with methods employed here. The C. hova-complex, a species-complex consisting of five morphological forms, is hence defined and the three described species above are associated with these morphotypes. Full descriptions including natural history information are presented for all species and the species-complex, as well as images, distribution maps and a species-identification key to the workers of Malagasy Decacrema. A diagnosis of the Malagasy Decacrema and identification keys to the subgenera of the ant genus Crematogaster in the Malagasy region are also provided.

scholarly journals DNA barcoding of native Caucasus herbal plants: potentials and limitations in complex groups and implications for phylogeographic patterns

2021 ◽  
Vol 9 ◽  
Author(s):  
Parvin Aghayeva ◽  
Salvatore Cozzolino ◽  
Donata Cafasso ◽  
Valida Ali-zade ◽  
Silvia Fineschi ◽  
...  
Keyword(s):  
Dna Barcoding ◽  
Dna Barcode ◽  
Species Level ◽  
Floristic Survey ◽  
Barcoding Gap ◽  
Plant Groups ◽  
History Of ◽  
Nuclear Its ◽  
Species Assignment ◽  
Assignment Success

DNA barcoding has rapidly become a useful complementary tool in floristic investigations particularly for identifying specimens that lack diagnostic characters. Here, we assess the capability of three DNA barcode markers (chloroplast rpoB, accD and nuclear ITS) for correct species assignment in a floristic survey on the Caucasus. We focused on two herbal groups with potential for ornamental applications, namely orchids and asterids. On these two plant groups, we tested whether our selection of barcode markers allows identification of the “barcoding gap” in sequence identity and to distinguish between monophyletic species when employing distance-based methods. All markers successfully amplified most specimens, but we found that the rate of species-level resolution amongst selected markers largely varied in the two plant groups. Overall, for both lineages, plastid markers had a species-level assignment success rate lower than the nuclear ITS marker. The latter confirmed, in orchids, both the existence of a barcoding gap and that all accessions of the same species clustered together in monophyletic groups. Further, it also allowed the detection of a phylogeographic signal.The ITS marker resulted in its being the best performing barcode for asterids; however, none of the three tested markers showed high discriminatory ability. Even if ITS were revealed as the most promising plant barcode marker, we argue that the ability of this barcode for species assignment is strongly dependent on the evolutionary history of the investigated plant lineage.

scholarly journals An illustrated key to the species of the genus Narella (Cnidaria, Octocorallia, Primnoidae)

ZooKeys ◽  
2019 ◽  
Vol 822 ◽  
pp. 1-15 ◽  
Author(s):  
Stephen D. Cairns ◽  
Michelle L. Taylor
Keyword(s):  
Outer Surface ◽  
Body Wall ◽  
Species Level ◽  
The Body ◽  
Valid Species ◽  
History Of ◽  
Surface Ornamentation

A history of the description of the 50 valid species of Narella is given, beginning with the first species described in 1860. To help differentiate the various species, a tabular and a polychotomous key are provided. The species in the keys are arranged using nine characters or character sets that are believed to be of value at the species level. New characters or new significance given to previously described characters used in our keys include: 1) the nature of the dorsolateral edge of the basal scale, being ridged or not, 2) the thickness of the body wall scales, and 3) the arrangement of the coenenchymal scales (imbricate or mosaic), their thickness (thin or massive), and their outer surface ornamentation (ridged or not). All characters used in the keys are illustrated.

scholarly journals Historical specimens and the limits of subspecies phylogenomics in the New World quails (Odontophoridae)

2021 ◽  
Author(s):  
Jessie F Salter ◽  
Peter A Hosner ◽  
Edward L Braun ◽  
Rebecca T Kimball ◽  
Robb T Brumfield ◽  
...  
Keyword(s):  
New World ◽  
Phylogenetic Analyses ◽  
Species Level ◽  
Phylogenetic Structure ◽  
Northern Bobwhites ◽  
Geographic Structure ◽  
Subspecies Level ◽  
History Of ◽  
Diverse Groups ◽  
Historical Samples

As phylogenomics focuses on comprehensive taxon sampling at the species and population/subspecies levels, incorporating genomic data from historical specimens has become increasingly common. While historical samples can fill critical gaps in our understanding of the evolutionary history of diverse groups, they also introduce additional sources of phylogenomic uncertainty, making it difficult to discern novel evolutionary relationships from artifacts caused by sample quality issues. These problems highlight the need for improved strategies to disentangle artifactual patterns from true biological signal as historical specimens become more prevalent in phylogenomic datasets. Here, we tested the limits of historical specimen-driven phylogenomics to resolve subspecies-level relationships within a highly polytypic family, the New World quails (Odontophoridae), using thousands of ultraconserved elements (UCEs). We found that relationships at and above the species-level were well-resolved and highly supported across all analyses, with the exception of discordant relationships within the two most polytypic genera which included many historical specimens. We examined the causes of discordance and found that inferring phylogenies from subsets of taxa resolved the disagreements, suggesting that analyzing subclades can help remove artifactual causes of discordance in datasets that include historical samples. At the subspecies-level, we found well-resolved geographic structure within the two most polytypic genera, including the most polytypic species in this family, Northern Bobwhites (Colinus virginianus), demonstrating that variable sites within UCEs are capable of resolving phylogenetic structure below the species level. Our results highlight the importance of complete taxonomic sampling for resolving relationships among polytypic species, often through the inclusion of historical specimens, and we propose an integrative strategy for understanding and addressing the uncertainty that historical samples sometimes introduce to phylogenetic analyses.

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