scholarly journals An evaluation of the systematics of the genus Thalia (Thaliacea, Salpidae) based on new material from the EASTROPAC and MORO expeditions

1996 ◽  
Vol 66 (3) ◽  
pp. 185-191
Author(s):  
María C. Daponte ◽  
Roberto J. Castro ◽  
Graciela B. Esnal
Keyword(s):  
Related Species ◽  
Great Variability ◽  
Closely Related Species ◽  
Sympatric Distribution ◽  
New Material

Until 1973, when Van Soest revised Thalia Blumenbach, 1798, this genus comprised only two species: Thalia democratica (Forsskål, 1775) and Thalia longicauda (Quoy & Gaimard, 1824). The former showed great variability, which led Van Soest to distinguish five species: T. democratica, T. orientalis, T. rhomboides, T. cicar, and T. sibogae. Some authors have ignored this revision considering the observed differences of infraspecific level. In the present work new material is studied analysing variables not previously considered, such as the development of blastogenic stolons in the solitary zooids and the location of the tunnel opening through which the bud blocks are liberated. These characters previously permitted a separation of closely related species in the genus Ihlea. The results show that stolon features, even though they permit a separation of solitary zooids of Thalia longicauda, do not discriminate all species of the “T. democratica group” since they are only useful in distinguishing T. democratica from T. sibogae. Other variables, mainly qualitative, do permit differentiation. The sympatric distribution of these taxa supports Van Soest’s hypothesis as well.

Additional information on Alainaspis and Boothiaspis, cyathaspidids (Agnatha: Heterostraci) from the Upper Silurian of Northwest Territories, Canada

1991 ◽  
Vol 65 (2) ◽  
pp. 308-313 ◽  
Author(s):  
David K. Elliott ◽  
David L. Dineley
Keyword(s):  
Northwest Territories ◽  
Related Species ◽  
Posterior Margin ◽  
Dorsal Shield ◽  
Filter Feeder ◽  
Closely Related Species ◽  
Additional Information ◽  
New Material ◽  
Upper Silurian ◽  
Original Interpretation

New material of the poraspid Alainaspis platyrhina Elliott and Dineley has made it possible to provide a more extensive reconstruction of this animal. It is now clear that an elongated branchial opening was present below the lateral lamina and that a well-developed post-branchial lobe was present. No branchial plate has been identified and this may have been fused to the dorsal shield, forming the ventral lamina. The lateral lamina is now seen to terminate in a rounded angle before the posterior margin of the shield. Several ventral shields with similar ornament are identified as belonging to A. platyrhina. These are broad and deep and are consistent with the original interpretation of this animal as a filter feeder. One similar shield with a coarser ornament is tentatively assigned to the closely related species Boothiaspis ovata Broad.

scholarly journals New Scymnus (Pullus)-species (Coleoptera, Coccinellidae) from Uganda

1998 ◽  
Vol 9 (2) ◽  
pp. 85-94
Author(s):  
Helmut Fürsch
Keyword(s):  
New Species ◽  
Related Species ◽  
Closely Related Species ◽  
New Synonyms ◽  
Kibale Forest ◽  
New Material ◽  
Three New Species

Three new species of Ugandan Kibale forest are described, figured and compared with closely related species: Scymnus (Pullus) auritoides sp. n., S. (Pullus) fumosipennis sp. n. and S. (Pullus) siphonofissus sp. n. S. (Pullus) nigropectus Mader is redescribed, based on new material. New synonyms: S. mundus Mader is a younger synonym of S. nigrosellatus Mader and S. couturieri Chazeau is a synonym of S. majeri Fürsch.

scholarly journals Tipula (Vestiplex) butvilai sp. nov., a new crane fly (Diptera, Tipulidae) from Yunnan, China

ZooKeys ◽  
2019 ◽  
Vol 869 ◽  
pp. 91-101
Author(s):  
Pavel Starkevich ◽  
Aidas Saldaitis ◽  
Qiu-Lei Men
Keyword(s):  
New Species ◽  
Related Species ◽  
Yunnan Province ◽  
Species Group ◽  
Closely Related Species ◽  
New Material

A new crane fly, Tipula (Vestiplex) butvilaisp. nov., is described and illustrated based on new material collected in the Nu Jiang Valley of Yunnan Province, China. The hypopygium for the most closely related species, Tipula (Vestiplex) testata Alexander, 1935, is also illustrated. A key is provided to distinguish males of the new species from those of other species in the T. (V.) bicornigera Alexander, 1938 species group.

Microsatellite Marker: Importance and Implications of Cross-genome Analysis for Finger Millet (Eleusine coracana (L.) Gaertn)

2020 ◽  
Vol 9 (3) ◽  
pp. 160-170
Author(s):  
Thumadath P.A. Krishna ◽  
Maharajan Theivanayagam ◽  
Gurusunathan V. Roch ◽  
Veeramuthu Duraipandiyan ◽  
Savarimuthu Ignacimuthu
Keyword(s):  
Molecular Marker ◽  
Microsatellite Markers ◽  
Ssr Markers ◽  
Genome Analysis ◽  
Related Species ◽  
Finger Millet ◽  
Crop Improvement ◽  
Human Beings ◽  
Closely Related Species ◽  
Genome Amplification

Finger millet is a superior staple food for human beings. Microsatellite or Simple Sequence Repeat (SSR) marker is a powerful tool for genetic mapping, diversity analysis and plant breeding. In finger millet, microsatellites show a higher level of polymorphism than other molecular marker systems. The identification and development of microsatellite markers are extremely expensive and time-consuming. Only less than 50% of SSR markers have been developed from microsatellite sequences for finger millet. Therefore, it is important to transfer SSR markers developed for related species/genus to finger millet. Cross-genome transferability is the easiest and cheapest method to develop SSR markers. Many comparative mapping studies using microsatellite markers clearly revealed the presence of synteny within the genomes of closely related species/ genus. Sufficient homology exists among several crop plant genomes in the sequences flanking the SSR loci. Thus, the SSR markers are beneficial to amplify the target regions in the finger millet genome. Many SSR markers were used for the analysis of cross-genome amplification in various plants such as Setaria italica, Pennisetum glaucum, Oryza sativa, Triticum aestivum, Zea mays and Hordeum vulgare. However, there is very little information available about cross-genome amplification of these markers in finger millet. The only limited report is available for the utilization of cross-genome amplified microsatellite markers in genetic analysis, gene mapping and other applications in finger millet. This review highlights the importance and implication of microsatellite markers such as genomic SSR (gSSR) and Expressed Sequence Tag (EST)-SSR in cross-genome analysis in finger millet. Nowadays, crop improvement has been one of the major priority areas of research in agriculture. The genome assisted breeding and genetic engineering plays a very crucial role in enhancing crop productivity. The rapid advance in molecular marker technology is helpful for crop improvement. Therefore, this review will be very helpful to the researchers for understanding the importance and implication of SSR markers in closely related species.

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