|
|
The articulation of insect wings
Křečková, Adéla ; Prokop, Jakub (advisor) ; Král, David (referee)
The origin of wings is one of the most important innovation in insect evolution which opened new niches due to unique flight abilities. Movement of the wing is provided by the specific wing base structures consisted of the articular sclerites and the flight muscles. In general there are three main types of basal articulation in insects. Neopteran articulation represents presumably the ancetral type from which the others are derived. These are found in two palaeopteran orders Ephemeroptera and Odonata. Palaeoptera differs from Neoptera by incapability of the wing flexion over the abdomen. This incapability is caused by their specific articulation of the wings to the thorax. Various arrangements of wing sclerites among insect groups have significance in respect of phylogeny and thus represent number of important morphological characters. These are therefore used in higher systematics of extant groups as well as scarcely in their extinct fossil relatives. In the present thesis I introduce the review of literature sources concerning the main types of the wing articulation, their homologies and their significance in respect of higher insect phylogeny.
|
|
|
Variability of Ephemeroptera of family Baetidae (Insecta, Ephemeroptera, Baetidae)
KOLLROSS, Jan
This thesis deals with a variability of the Baetis fuscatus species-group (Ephemeroptera: Baetidae). This study contains three main topics: The first one is distinguishing between two highly similar species, Baetis scambus and Baetis fuscatus based on morfological structures, specifically their mouthparts - labial palps. To analyze the shape of the labial palps, I applied a computerized outline analysis. Second topic is focused on the validity of Baetis beskidensis as a distinct species based on the morphology and DNA sequences (obtained for the topotypical material for the first time). And finally, I also investigated some samples from Corsica in attempt to discover new species of the Baetis fuscatus species-group. I found that most probably it is not possible to distinguish between Baetis scambus and Baetis fuscatus based on the shape of their labial palps. Baetis beskidensis is morfologically different, but genetically not distinctly separated from other representatives of the Baetis fuscatus species-group. I didn´t discover any distinct morphological differences in specimens from Corsica, pointing to the possible existence of new species.
|
|
|
Systematics of mayflies (Ephemeroptera) of the family Baetidae
SROKA, Pavel
The current thesis reviews a cross-section of studies dealing with several problems of systematics of the mayfly (Ephemeroptera) family Baetidae. It is based on classic morphological characters as well as molecular-based methods in order to solve specific taxonomic problems and reconstruct phylogenetic relationships within the selected taxa.
|
|
|
Palingenia longicauda (Olivier, 1791) (Ephemeroptera, Palingeniidae): Do refugia in the Danube basin still work?
Soldán, Tomáš ; Godunko, Roman J. ; Zahrádková, S. ; Sroka, Pavel
Palingenia longicauda (OLIVIER, 1791), a well-known species of mayfly belongsto the most critically endangered species of the Ephemeroptera in Europe. It represents the Pontic faunistic element of the expansive type originally distributed in almost all great and numerous middle-sized European rivers in Austria, Belgium, Bulgaria, Czech Republic, France, Germany, Hungary, Macedonia, Poland, Rumania, Slovakia, Ukraine and Yugoslavia. At present, the species is extinct or at least missing at most of its original area except for relatively small refugia in the Tisza basin in Hungary and probably also Slovakia and Ukraine. Distribution of P. longicauda is discussed and a new subarea in the Danube delta in Rumania (locality near Murighiol, stretch of the Bratul Sfintu Gheoghe) is documented for the first time. The nature of a new occurrence is discussed – it might represent either a new, still unknown refuge and/or recovery of the original population(s) caused by downstream drift.
|
|
| |
guest ::
