@mastersthesis {1169, title = {Karyotypov{\'a} variabilita stono{\v z}kovc{\r u} (Myriapoda) / Karyotype variability of Myriapoda}, year = {2020}, month = {13/07/2020}, pages = {38}, school = {Univerzita Karlova, P{\v r}{\'\i}rodov{\v e}deck{\'a} fakulta}, type = {Bachelor thesis}, address = {Prague}, abstract = {

Abstrakt: Bakal\á{\v r}sk\á pr\áce pojedn\áv\á o diploidn\ích po{\v c}tech chromozom{\r u}, jejich morfologii a chromozomov\ém mechanismu ur{\v c}en\í pohlav\í u {\v c}ty{\v r}ech t{\v r}\íd podkmene Myriapoda. Pozornost je z\árove{\v n} v{\v e}nov\ána vz\ájemn\ým fylogenetick\ým vztah{\r u}m v r\ámci podkmene. P{\v r}ehled literatury ukazuje m\íru prozkoumanosti cytogenetick\ých charakteristik u jednotliv\ých t{\v r}\íd, kter\á je zejm\éna ve t{\v r}\íd\ách Pauropoda a Symphyla st\ále velmi n\ízk\á a v r\ámci t{\v r}\ídy Diplopoda je st\ále je\št{\v e} velk\é mno{\v z}stv\í {\v r}\ád{\r u}, kde n\ám tyto informace zcela chyb\í. Cytogenetick\é anal\ýzy odhalily celkov\é rozp{\v e}t\í po{\v c}tu chromozom{\r u} pro: Pauropoda 2n = 12 \– 27, Symphyla 2n = 11 \– 18, Chilopoda 2n = 14 \– 54 a Diplopoda 2n = 8 \– 30. V r\ámci v\šech {\v c}ty{\v r} t{\v r}\íd se vyskytuj\í jak morfologicky nediferencovan\é pohlavn\í chromozomy, tak syst\émy typu XX/XY a XX/X0. Nav\íc je u {\v r}\ádu Spirostreptida uv\ád{\v e}n\ý i syst\ém X1X1X2X2/X1X20. Pouze u mal\ého mno{\v z}stv\í druh{\r u} z {\v r}\ád{\r u} Glomerida, Calipodida, Julida, Spirostreptida a Lithobiomorpha a {\v c}eledi Scutigerellidae se poda{\v r}ilo identifikovat v\ýskyt NOR{\r u}. V pr\áci se tak\é poda{\v r}ilo identifikovat n{\v e}kter\é neshody mezi \údaji r{\r u}zn\ých prac\í, kdy se ukazuje, {\v z}e zejm\éna n{\v e}kter\é star\š\í studie byly postaveny na \špatn\ém pozorov\án\í chromozom{\r u} v karyotypu.

Karyotype variability of Myriapoda

Abstract: The bachelor thesis deals with diploid numbers of chromosomes, their morphology and chromosome mechanism of sex determination in four classes of the subphylum Myriapoda. Attention is also paid to mutual phylogenetic relationships within the subphylum. A review of the literature shows the degree of examination of cytogenetic characteristics in individual classes, which is still very low, especially in the classes Pauropoda and Symphyla, and within the class Diplopoda there are still a large number of orders where we completely lack this information. Cytogenetic analyzes revealed a total range of chromosome numbers for: Pauropoda 2n = 12 - 27, Symphyla 2n = 11 - 18, Chilopoda 2n = 14 - 54 and Diplopoda 2n = 8 - 30. Within all four classes, there are both morphologically undifferentiated sex chromosomes and XX/XY and XX/X0 systems. In addition, the X1X1X2X2/X1X20 system is mentioned for the order Spirostreptida. Only a small number of species from the orders Glomerida, Calipodida, Julida, Spirostreptida, Lithobiomorpha and from family Scutigerellidae were able to identify the occurrence of NORs. The work also managed to identify some discrepancies between the data of different works, which shows that especially some older studies were based on poor observation of chromosomes in the karyotype.

}, keywords = {Chilopoda, chromosomes, chromozomy, Diplopoda, fylogeneze, karyotyp, karyotype, Myriapoda, Pauropoda, phylogeny, Symphyla, variabilita, variability}, url = {https://dspace.cuni.cz/handle/20.500.11956/119725}, author = {K{\'a}{\v s}ov{\'a}, Ad{\'e}la} } @article {883, title = {A new species of Carlogonus Demange, 1961 from southern India (Spirostreptida, Harpagophoridae, Harpagophorinae), with phylogenetic analysis and species-group divisions in the genus}, journal = {Zootaxa}, volume = {4868}, year = {2020}, month = {23/10/2020}, pages = {27-40}, abstract = {

The genus Carlogonus Demange, 1961, is diagnosed, and its relationship with other members of the Harpurostreptini Hoffman, 1980 is discussed. A new species, Carlogonus gayathri sp. nov. is described and illustrated from the southern Indian State of Kerala, and its DNA barcoding data is presented. Phylogenetic analysis based on mtDNA sequence data revealed that Carlogonus is sister-taxon to Thyropygus Pocock, 1894. Two species-groups are recognised in Carlogonus: the exaratus-group is characterised by a single tibial spine on the gonopod, while the acifer-group has paired tibial spines. A dichotomous key is presented for the known Carlogonus spp., and the current distribution of the genus is mapped.

}, keywords = {Bharathapuzha River, India, Myriapoda, natural history, new species, phylogeny, species-group}, issn = {1175-5326}, doi = {10.11646/zootaxa.4868.1.2}, url = {https://www.biotaxa.org/Zootaxa/article/view/zootaxa.4868.1.2}, author = {Sankaran, Pradeep M. and Sebastian, Pothalil A.} } @article {835, title = {Enzymatic activities in the digestive tract of spirostreptid and spirobolid millipedes (Diplopoda: Spirostreptida and Spirobolida)}, journal = {Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology}, volume = {241}, year = {2019}, month = {18/11/2019}, abstract = {

Millipedes represent a model for the study of organic matter transformation, animal-microbial interactions, and compartmentalisation of digestion. The activity of saccharidases (amylase, laminarinase, cellulase, xylanase, chitinase, maltase, cellobiase, and trehalase) and protease were measured in the midgut and hindgut contents and walls of the millipedes Archispirostreptus gigas and Epibolus pulchripes. Assays done at pH 4 and 7 confirmed activities of all enzymes except xylanase. Hydrolysing of starch and laminarin prevailed. The hindgut of E. pulchripes was shorter, less differentiated. Micro-apocrine secretion was observed only in the midgut of A. gigas. Merocrine secretion was present in midgut and hindgut of E. pulchripes, and in the pyloric valve and anterior hindgut of A. gigas. Alpha-polysaccharidases were mostly active in the midgut content and walls, with higher activity at pH 4. The low activity of amylase (A. gigas) and laminarinase (E. pulchripes) in midgut tissue may indicate their synthesis in salivary glands. Cellulases were found in midgut. Chitinases, found in midgut content and tissue (E. pulchripes) or concentrated in the midgut wall (A. gigas), were more active at an acidic pH. Polysaccharidases were low in hindguts. Protease shows midgut origin and alkaline activity extending to the hindgut in E. pulchripes, whereas in A. gigas it is of salivary gland origin and acid activity restricted to the midgut. Some disaccharidases, with more alkaline activity, showed less apparent midgut-hindgut differences. It may indicate an axial separating of the primary and secondary digestion along the intestinal pH gradient or the presence of enzymes of hindgut parasites.

}, keywords = {Cellulase, Digestive enzymes, Gut compartments, Histology, Myriapoda}, issn = {10964959}, doi = {10.1016/j.cbpb.2019.110388}, url = {https://linkinghub.elsevier.com/retrieve/pii/S1096495919303471}, author = {{\v S}ustr, Vladimir and Semanov{\'a}, S. and Rost-Roszkowska, Magdalena M. and Tajovsk{\'y}, Karel and Sosinka, Agnieszka and Kaszuba. Florentyna} } @article {573, title = {Redescription of Zinagon chilensis (Silvestri, 1903) from Chile, with a species list of Iulomorphidae from the Southern Hemisphere (Diplopoda: Spirostreptida: Epinannolenidea)}, journal = {Zootaxa}, volume = {3493}, year = {2012}, pages = {38{\textendash}48}, abstract = {

The epinannolenidean diplopod species Zinagon chilensis (Silvestri, 1903) is redescribed based on recently collected ma-terial from Chile, as well as on the re-examination of type specimens of both Iulomorpha chilensis Silvestri, 1903, and Zinagon osorno Chamberlin, 1957. The latter is here designated a junior subjective synonym. A list of the species of thefamily Iulomorphidae is provided, including 15 genera occurring in the Southern Hemisphere, i.e. South America, South Africa, Australia, and New Zealand.

}, keywords = {Cambaloidea, millipedes, Myriapoda, new synonymy}, author = {Kors{\'o}s, Zolt{\'a}n} }