scholarly journals Genetic differentiation in Gammarus fossarum and G. caparti (Crustacea, Amphipoda) with reference to G. pulex pulex in northwestern Europe

1989 ◽  
Vol 59 (3) ◽  
pp. 127-139 ◽  
Author(s):  
Maarten Scheepmaker ◽  
Jan van Dalfsen
Keyword(s):  
Genetic Differentiation ◽  
Taxonomic Status ◽  
Species Level ◽  
Gammarus Fossarum ◽  
Northern France ◽  
Enzyme Loci

Genetic differentiation among G. fossarum Koch, 1835 from different stations in Germany, Switzerland, Belgium and northern France, and the closely related Belgian form G. caparti Pètre-Stroobants, 1980 was investigated by electrophoresis at 20 enzyme loci. Although morphologically variable, geographically distant populations of G. cf. fossarum were hitherto considered conspecific. In the present study, populations of G. cf. fossarum and G. caparti were examined with reference to G. pulex pulex as an estimate for genetic differentiation at the species level. With G. p. pulex as a standard, genetic differentiation among geographically distant populations of G. cf. fossarum is occasionally observed at species level. The populations of G. caparti studied were shown to be genetically very similar to certain populations of G. fossarum. The taxonomic status of G. caparti and the genetically distinct forms of G. fossarum is discussed.

Taxonomy and distribution of the Pygmy Eagle Aquila (Hieraaetus) weiskei (Accipitriformes: Accipitridae)

Zootaxa ◽  
2009 ◽  
Vol 2326 (1) ◽  
pp. 24-38
Author(s):  
JAN O. GJERSHAUG ◽  
HEATHER R. L. LERNER ◽  
OLA H. DISERUD
Keyword(s):  
Genetic Differentiation ◽  
Taxonomic Status ◽  
New Guinea ◽  
Species Level ◽  
Genetic Evidence ◽  
Sister Species ◽  
Cyt B

We re-evaluated the taxonomic status of the New Guinean subspecies weiskei of the Little Eagle Aquila morphnoides and confirmed that it differs considerably from the Australian A. morphnoides in multiple morphological and plumage characters. Genetic differentiation in published mitochondrial cyt-b and ND2 sequences between the nominate subspecies and weiskei is equivalent to that found between other accipitrid taxa at the species level, as are pairwise divergences between each Little Eagle taxon and their sister species, the Booted Eagle A. pennata. The available morphological and genetic evidence thus strongly and unambiguously supports the specific distinctness of A. weiskei. We propose the English name Pygmy Eagle, as this is the world’s smallest known eagle. We show that the distribution of A. weiskei includes the western part of New Guinea (Vogelkop) and the Moluccas (Halmahera, Ternate and Seram), based on our new observations.

The types of skippers described by Shu-Iti Murayama (Lepidoptera: Hesperiidae)

Zootaxa ◽  
2020 ◽  
Vol 4801 (2) ◽  
pp. 280-290
Author(s):  
HIDEYUKI CHIBA ◽  
HIROSHI TSUKIYAMA ◽  
JIA-YUAN LIANG ◽  
SHOU-MING WANG ◽  
ZONG-YU SHEN ◽  
...  
Keyword(s):  
Taxonomic Status ◽  
Species Level ◽  
Valid Species ◽  
Subspecies Level ◽  
Subjective Synonym

Fifteen holotypes of Asian Hesperiidae taxa described by Shu-iti Murayama were examined, and their taxonomic status is discussed. We confirm that five are valid names while the rest are synonyms as indicated partially by previous authors. Valid species-level names are Aeromachus matudai (Murayama), Aeromachus bandaishanus Murayama & Shimonoya, Coladenia pinsbukana (Shimonoya & Murayama), and Sebastonyma suthepiana Murayama & Kimura. Valid subspecies-level name is Ochlodes yuchingkina Murayama & Shimonoya. In order to settle the taxonomic status of Pedesta masuriensis cuneomaculata Murayama, masuriensis and tali were studied morphologically and molecularly. As a result, we consider that masuriensis and tali are two different species and treat cuneomaculata as a junior subjective synonym of tali. 

Taxonomic status of Andersen’s fruit-eating bat (Artibeus jamaicensis aequatorialis) and revised classification of Artibeus (Chiroptera: Phyllostomidae)

Zootaxa ◽  
2010 ◽  
Vol 2648 (1) ◽  
pp. 45 ◽  
Author(s):  
PETER A. LARSEN ◽  
MARÍA R. MARCHÁN-RIVADENEIRA ◽  
ROBERT J. BAKER
Keyword(s):  
Taxonomic Status ◽  
Morphological Characters ◽  
Species Level ◽  
South American ◽  
Reciprocal Monophyly ◽  
Dna Variation ◽  
The Andes ◽  
Artibeus Jamaicensis ◽  
Phylogenetic Studies

Fruit-eating bats of the genus Artibeus are widely distributed across the Neotropics and are one of the most recently evolved assemblages of the family Phyllostomidae. Although the taxonomy and systematics of species of Artibeus has been the subject of an intense historical debate, the most current taxonomic arrangements recognize approximately eleven species within the genus. However, recent phylogenetic studies indicate that species diversity within South and Middle American populations of Artibeus is underestimated. South American populations referable to A. jamaicensis aequatorialis are of considerable interest because previous studies of mitochondrial DNA variation identified potential species level variation west of the Andes Mountains. In this study we use morphometric and genetic data (nuclear AFLPs) to investigate the taxonomic status of A. j. aequatorialis. Our results indicate that elevating aequatorialis to species level is appropriate based on statistically supported reciprocal monophyly in mitochondrial and nuclear datasets and diagnostic morphological characters. In light of our results, and of those presented elsewhere, we provide a revised classification of the genus.

Nomenclatural notes on some taxa of Bidessus Sharp and designation of a neotype (Coleoptera: Dytiscidae: Hydroporinae: Bidessini)

Zootaxa ◽  
2019 ◽  
Vol 4565 (4) ◽  
pp. 579 ◽  
Author(s):  
HANS FERY
Keyword(s):  
Taxonomic Status ◽  
Species Level ◽  
Type Locality ◽  
Modern Material ◽  
Male Specimen ◽  
Genus Level ◽  
Nomina Dubia ◽  
The Stability

The nomenclature of some taxa of the tribe Bidessini is dealt with. Currently, the names of these taxa are mostly interpreted as synonyms of Bidessus unistriatus (Goeze, 1777). The four oldest names for this species are shown to be nomina dubia due to insufficient descriptions and lack of name-bearing types. These names are in their original combinations Dyticus parvulus O.F. Müller, 1776, Dytiscus unistriatus Goeze, 1777, Dytiscus unistriatus Schrank, 1781, and Dyticus monostriatus Geoffroy in Fourcroy, 1785. The uncertainties of these species-level names also affect the identity of the genus-level names Bidessus Sharp, 1882, and Hydroglyphus Motschulsky, 1853a, meaning that the stability of nomenclature in the tribe Bidessini is considerably threatened. To eliminate this threat by clarifying the taxonomic status and the type locality of each of these nominal taxa, one and the same male specimen is designated as neotype for unistriatus Goeze, unistriatus Schrank and monostriatus Geoffroy in Fourcroy, and thus these three names become objective synonyms. The neotype is selected from modern material collected near Paris (France) because the type localities of all three taxa include "Paris environs". This is the locality from which Geoffroy (1762) described the non-binominal "ditique à une seule strie" and to which is referred in the descriptions of the latter three taxa. To prevent the threat of the stability by the name parvulus O.F. Müller it is intended to make an application to the ICZN in order to suppress this name for the purpose of priority. 

scholarly journals Taxonomy of the genus Commelina Plum. ex L. (Commelinaceae) in Nepal

2010 ◽  
Vol 6 ◽  
pp. 25-31 ◽  
Author(s):  
Jyoti P Gajurel ◽  
Krishna K Shrestha
Keyword(s):  
Key Words ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Species Level ◽  
Morphological Data ◽  
Plant Science ◽  
The World ◽  
Voucher Specimens ◽  
Key Words Anatomy ◽  
Anatomical Characters

About 170 species of Commelina are known from tropical and subtropical regions of the world. Nepal contributes 6 species of Commelina to the world flora. In the present work, taxonomy of all the six species of Commelina reported from Nepal (C. benghalensis, C. caroliniana, C. diffusa, C. maculata, C. paludosa and C. suffruticosa) was studied. Voucher specimens were collected from Central and Eastern Nepal, covering 14 districts. Morphological characters were studied from these collections. Palynological and anatomical characters were also used to see if they are taxonomically important to delimit the taxa within Commelina. Morphological characters seemed promising to delimit the taxa within Commelina. The key identifying characters at species level are modification in root, form of spathe, structure of leaves and seeds, shape of stomata and pollen. Palynological and anatomical characters were also useful, to some extent, in separating some species, but were not significant as compared to morphological data. Some specimens, close to C. benghalensis and C. caroliniana, showed very different characters. Thus further study is needed to confirm their taxonomic status. Key-words: anatomy; flora; morphological characters; palynology; voucher specimens.DOI: 10.3126/botor.v6i0.2907 Botanica Orientalis - Journal of Plant Science (2009) 6: 25-31

scholarly journals Genetic Differentiation of the Iberian Amphiodus Gammarus Ibericus Margalef, 1951 and G. Gauthieri S. Karaman, 1935, with Reference to some Related Species in France

1988 ◽  
Vol 58 (2) ◽  
pp. 205-226 ◽  
Author(s):  
Maarten Scheepmaker ◽  
Frits van der Meer ◽  
Sjouk Pinkster
Keyword(s):  
Genetic Differentiation ◽  
Iberian Peninsula ◽  
Related Species ◽  
Gammarus Pulex ◽  
Southern France ◽  
Enzyme Loci

Populations of five related species belonging to the Gammarus pulex group from the Iberian Peninsula and southern France have been studied electrophoretically at 21 enzyme loci. Morphologically distinct forms from the same side of the Pyrenees proved to be genetically more similar than morphologically very similar forms from opposite sides of this barrier.

scholarly journals An overlooked threatened species of eagle: Legge's Hawk Eagle Nisaetus kelaarti (Aves: Accipitriformes)

Zootaxa ◽  
2008 ◽  
Vol 1792 (1) ◽  
pp. 54 ◽  
Author(s):  
J. O. GJERSHAUG ◽  
O. H. DISERUD ◽  
P. C. RASMUSSEN ◽  
D. WARAKAGODA
Keyword(s):  
Genetic Differentiation ◽  
Threatened Species ◽  
Species Delimitation ◽  
Taxonomic Status ◽  
Sri Lankan ◽  
Moderate Degree ◽  
Cyt B ◽  
Conservation Measures ◽  
Primary Projection

Species delimitation is fundamental to many areas of biology, and in cases where taxonomic status has not been sufficiently clarified the ramifications can be as serious as extinction due to the failure to implement conservation measures. Since 1931, the Mountain Hawk Eagle Nisaetus (Spizaetus) nipalensis Hodgson has included the allopatric Sri Lankan and southern Indian taxon N. kelaarti (Legge) as a subspecies, and its taxonomic status has not been re-evaluated. We found that N. kelaarti differs considerably from N. nipalensis in its relatively much larger bill and claws and short primary projection, and that it also differs consistently in numerous plumage characters and other mensural characters. Its vocalizations differ distinctly, and an earlier study found a moderate degree of genetic differentiation (4.4% in cyt b and 3.1% in CR) from N. nipalensis. The available evidence thus strongly and unambiguously supports the specific distinctness of N. kelaarti.

Biochemical Genetic Variation, Growth and Regeneration of the Sea Anemone, Metridium, of British Shores

1985 ◽  
Vol 65 (1) ◽  
pp. 141-157 ◽  
Author(s):  
Ann Bucklin
Keyword(s):  
Genetic Differentiation ◽  
Taxonomic Status ◽  
Sea Anemone ◽  
Sea Anemones ◽  
The United Kingdom ◽  
Metridium Senile ◽  
Genetic Differentiation Of Populations ◽  
Biochemical Genetic ◽  
Enormous Number ◽  
Interesting System

Sessile organisms capable of asexual reproduction may be expected to show much genetic differentiation among local populations: mating between distant individuals is unlikely and genetic drift will contribute to differentiation since habitats can be colonized by one or a few individuals. This study investigates genetic differentiation of populations of the sea anemone Metridium senile (L.) in Great Britain. Individuals of M. senile are sessile and reproduce both sexually, by free-spawning of gametes, and asexually, by regeneration of fragments torn from the pedal disc. Metridium senile is one of the most common and widespread of British sea anemones (Manuel, 1981); reports place it at an enormous number and variety of sites around Britian (unpublished results of surveys by the Underwater Conservation Society of the United Kingdom). The extensive geographic range and variability of the species have confounded attempts to determine the taxonomic status of the ecological and morphological forms, but make it an interesting system for genetic analysis.

Taxonomic status of Clematis acerifolia var. elobata, based on molecular evidence

Phytotaxa ◽  
2016 ◽  
Vol 268 (3) ◽  
pp. 209 ◽  
Author(s):  
SHUANG-XI YAN ◽  
HUI-JIE LIU ◽  
LE-LE LIN ◽  
SHUAI LIAO ◽  
JIN-YU LI ◽  
...  
Keyword(s):  
Taxonomic Status ◽  
Species Level ◽  
Distribution Area ◽  
Molecular Evidence ◽  
Discrimination Power ◽  
Nuclear Its ◽  
The Mean ◽  
Morphological Differences ◽  
The Relationship ◽  
Better Than

The morphologically based taxonomic status of Clematis acerifolia var. elobata has been controversial. This study used two nuclear (ITS and ETS) and six plastid (rps16, rpl16, accD, trnS-trnG, atpB-rbcL, and trnV-atpE) molecular markers, and a DNA barcoding analysis to address the taxonomic status of C. acerifolia var. elobata and the relationship among other Clematis species. Our results showed that the discrimination power of ITS, ETS, and atpB-rbcL was better than that of the other tested DNA regions. When all tested sequences combined, most of the sampled taxa were resolved. Though the two taxa are closely related, they have differentiated clearly and formed two clades respectively. The mean divergence of the two taxa was 0.78%, which was higher than closely related Clematis species such as C. heracleifolia and C. pinnata (0.50 %). Considering molecular divergence, morphological differences, and distribution area, we raised C. acerifolia var. elobata to species level.

Sign in / Sign up

Export Citation Format

Share Document