Karyotype variation and geographic distribution of the three sibling species of the Drosophila kikkawai complex

Genetica ◽  
1980 ◽  
Vol 54 (2) ◽  
pp. 113-120 ◽  
Author(s):  
V. Baimai ◽  
C. Chumchong
Keyword(s):  
Geographic Distribution ◽  
Sibling Species

scholarly journals Description of two new species of Stigmaeopsis, Banks 1917 (Acari, Tetranychidae) inhabiting Miscanthus grasses (Poaceae)

Acarologia ◽  
2018 ◽  
Vol 58 (2) ◽  
pp. 414-429
Author(s):  
Y. Saito ◽  
Y. Sato ◽  
A.R. Chittenden ◽  
J.-Z. Lin ◽  
Y.-X. Zhang
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Sibling Species ◽  
Genetic Data ◽  
The Other ◽  
Male Aggression ◽  
Japanese Species ◽  
Two New Species ◽  
New Diagnosis ◽  
Japan And China

We provided a new diagnosis of the genus Stigmaeopsis. Then we described two new species that are very closely related to Stigmaeopsis miscanthi (Saito) from Miscanthus spp. in Japan and China. The Japanese species, named Stigmaeopsis sabelisi Saito and Sato n. sp., was previously referred to as Stigmaeopsis miscanthi low aggressiveness form , and is characterized by its low male-to-male aggression behavior. The other species, Stigmaeopsis continentalis Saito and Lin n. sp., was found in China (Fujian district). Thus four species could be discriminated from the species inhabiting Miscanthus and reed grasses. However, the two new species and S. miscanthi resemble each other very closely, thus they are considered to be sibling species. To identify them several naive characters, geographic distribution and genetic data are needed. An updated key to all known species of Stigmaeopsis is also proposed.

scholarly journals Geographic distribution of Pellia spp. (hepaticae, metzgeriales) in Poland based on electrophoretic identification

2014 ◽  
Vol 64 (1) ◽  
pp. 59-70 ◽  
Author(s):  
Jerzy Szweykowski ◽  
Roman Zieliński ◽  
Ireneusz Odrzykoski ◽  
Katarzyna Buczkowska
Keyword(s):  
Geographic Distribution ◽  
Sibling Species ◽  
Restricted Area ◽  
Central European ◽  
European Species ◽  
Reliable Identification ◽  
Diagnostic Characters ◽  
Species Complexes ◽  
Starch Gels

Many species of liverworts (<i>Hepaticae</i>) are morphologically plastic to such an extent that their proper recognition may cause difficulties even for a specialist. Central European species of the genus <i>Pellia</i> are notorious in this respect. Searching for less malleable diagnostic characters (than morphological and/or anatomical ones) we showed recently that the electrophoretic phenotypes (obtained by means of separation of enzyme proteins on starch gels) can be used for reliable identification of <i>Pellia</i> species with much reliability. During the last 20 years we performed electrophoretic identification of over 500 (exactly 541) colonies and discovered that at least two of the "classic" species of the genus <i>Pellia</i> are in fact species complexes comprising taxa having the character of sibling species. In this paper we have mapped all stations of electrophoretically identified <i>Pellia</i> species, including the sibling species mentioned; marked differences in their geographical distributions are discussed. Our work clearly shows that using more natural taxa (i.e.genetically defined sibling species instead of weakly characterised species complexes) in bryogeography, one can obtain meaningful results even in a geographically restricted area as, for instance in Poland.

Cytological studies of sibling species of Simulium tuberosum (Lundström) (Diptera: Simuliidae)

1982 ◽  
Vol 60 (3) ◽  
pp. 292-303 ◽  
Author(s):  
G. F. Mason
Keyword(s):  
Y Chromosome ◽  
Geographic Distribution ◽  
Sibling Species ◽  
Common Ancestor ◽  
Polytene Chromosomes ◽  
Chromosome Arm ◽  
Chromosome Pattern ◽  
High Degree

This paper extends the known geographic distribution of S. tuberosum siblings recorded in 1962 by R. Landau by analyzing the polytene chromosomes in the larva. Her seven basic IIS arrangements are augmented by the addition of four new types. These were St/A, A/A; CDE-2/CDE, CDE/CDE; Y2/AB, AB/AB; and FGI. These new siblings, like the originals, have fixed differences in chromosome arm IIS. One of these, FGI, distinguished by a high degree of polymorphism, and the presence of fixed differences from the tuberosum standard in arms IS, IL, and IIIL, occurred both in Alaska and Norway. A comparison of the standard tuberosum, the S. venustum, and the FGI sibling chromosome pattern revealed the FGI sibling to be much closer to the venustum standard than any other tuberosum sibling. A second new sibling (Y2/AB) from Norway differed from the standard in the Y chromosome by multiple rearrangements in IIS and two tandem inversions in IIL. The fixed changes on arms other than IIS in the FGI siblings and the Y2/AB sibling are the first to be detected in this complex. There were a number of shared inversions in the populations studied indicating a common ancestor and (or) introgression.

A new species of Contomastix (Squamata, Teiidae) supported by total evidence, with remarks on diagnostic characters defining the genus

2019 ◽  
pp. 23-36
Author(s):  
Mario. R. Cabrera
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Phylogenetic Reconstruction ◽  
Total Evidence ◽  
Molecular Evidence ◽  
Proximal Margin ◽  
Diagnostic Characters ◽  
Morphological Differences ◽  
A New Species ◽  
Molecular Characters

Formerly Cnemidophorus was thought to be the most speciose genus of Teiidae. This genus comprised four morphological groups that were later defined as four different genera, Ameivula, Aurivela, Cnemidophorus and Contomastix. The last appears as paraphyletic in a recent phylogenetic reconstruction based on morphology, but monophyletic in a reconstruction using molecular characters. Six species are allocated to Contomastix. One of them, C. lacertoides, having an extensive and disjunct geographic distribution in Argentina, Uruguay and Brazil. Preliminary analyses revealed morphological differences among its populations, suggesting that it is actually a complex of species. Here, we describe a new species corresponding to the Argentinian populations hitherto regarded as C. lacertoides, by integrating morphological and molecular evidence. Furthermore, we demonstrate that the presence of notched proximal margin of the tongue is a character that defines the genus Contomastix.

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