Genetic analysis of ciliates living on the groundwater amphipod Crangonyx islandicus (Amphipoda: Crangonyctidae)
Abstract
Two endemic subterranean freshwater amphipod species have been discovered in groundwater of the volcanic active zone in Iceland, Crangonyx islandicus and Crymostygius thingvallensis. At least five different ciliate sequences were isolated from C. islandicus and the analysis of variation at the 18S ribosomal DNA gene suggests that they present previously unsequenced species, from the orders Apostomatida and Philasterida. Apostome ciliates are well known to be exuviotrophic epibionts on crustaceans. Analyses of ciliate epibionts from different groundwater amphipod species from North America and mainland Europe reve...
Source: Acta Zoologica - June 28, 2017 Category: Zoology Authors: Ragnhildur Gudmundsd óttir, Etienne Kornobis, Bjarni K. Kristjánsson, Snæbjörn Pálsson Tags: ORIGINAL ARTICLE Source Type: research
Genetic analysis of ciliates living on the groundwater amphipod Crangonyx islandicus (Amphipoda: Crangonyctidae)
Acta Zoologica,Volume 99, Issue 2, Page 188-198, April 2018. (Source: Acta Zoologica)
Source: Acta Zoologica - June 27, 2017 Category: Zoology Source Type: research
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Acta Zoologica,Volume 99, Issue 2, Page 188-198, April 2018. (Source: Acta Zoologica)
Source: Acta Zoologica - June 27, 2017 Category: Zoology Source Type: research
Morphological and mitochondrial DNA variation revealed an undescribed lineage under the genus Sperata (Bagridae) in Bangladesh
Abstract
Catfishes Sperata are popular, known for its taste and nutritional value, and are found naturally in wide variety of freshwaters in South Asia. The taxonomy of Sperata spp., sampled from Hakaluki Haor in Bangladesh, was re‐evaluated based on morphological variation and DNA barcoding. The collective variation in morphometric characters and mitochondrial DNA revealed an undescribed old and well‐separated lineage under the genus Sperata along with two previously known Sperata aor and Sperata seenghala in Bangladesh. Analyses of morphological traits suggested significant differentiation among Sperata species. The ...
Source: Acta Zoologica - June 22, 2017 Category: Zoology Authors: Mohammed Mahbub Iqbal, M. M. Mahbub Alam, Muhammad Anamul Kabir, Sn æbjörn Pálsson Tags: ORIGINAL ARTICLE Source Type: research
Morphological and mitochondrial DNA variation revealed an undescribed lineage under the genus Sperata (Bagridae) in Bangladesh
Acta Zoologica,Volume 99, Issue 2, Page 177-187, April 2018. (Source: Acta Zoologica)
Source: Acta Zoologica - June 22, 2017 Category: Zoology Source Type: research
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Acta Zoologica,Volume 99, Issue 2, Page 177-187, April 2018. (Source: Acta Zoologica)
Source: Acta Zoologica - June 22, 2017 Category: Zoology Source Type: research
Overlap Indices: Tools to quantify the amount of anatomical overlap among groups of incomplete terminal taxa in phylogenetic analyses
Abstract
Phylogenetic analyses of morphological data are often characterized by missing data due to incomplete operational taxonomic units, as in fossils. This incomplete knowledge derives from various reasons, including—in the case of fossils—the numerous filters an organism has to pass through during taphonomy, fossilization, weathering and collecting. Whereas several methods have been proposed to address issues raised by the inclusion of incomplete terminal taxa, until recently no tool existed to easily quantify the amount of anatomical overlap within a particular clade. The Overlap Indices provide such values and m...
Source: Acta Zoologica - June 20, 2017 Category: Zoology Authors: Emanuel Tschopp, Friedrich A. Tschopp, Oct ávio Mateus Tags: ORIGINAL ARTICLE Source Type: research
Overlap Indices: Tools to quantify the amount of anatomical overlap among groups of incomplete terminal taxa in phylogenetic analyses
Acta Zoologica,Volume 99, Issue 2, Page 169-176, April 2018. (Source: Acta Zoologica)
Source: Acta Zoologica - June 20, 2017 Category: Zoology Source Type: research
Reproductive biology of Philodryas patagoniensis (Snakes: Dipsadidae) in south Brazil: Female reproductive cycle
Acta Zoologica,Volume 99, Issue 2, Page 105-114, April 2018. (Source: Acta Zoologica)
Source: Acta Zoologica - June 20, 2017 Category: Zoology Source Type: research
Overlap Indices: Tools to quantify the amount of anatomical overlap among groups of incomplete terminal taxa in phylogenetic analyses
Acta Zoologica,Volume 99, Issue 2, Page 169-176, April 2018. (Source: Acta Zoologica)
Source: Acta Zoologica - June 20, 2017 Category: Zoology Source Type: research
Reproductive biology of Philodryas patagoniensis (Snakes: Dipsadidae) in south Brazil: Female reproductive cycle
Acta Zoologica,Volume 99, Issue 2, Page 105-114, April 2018. (Source: Acta Zoologica)
Source: Acta Zoologica - June 20, 2017 Category: Zoology Source Type: research
