Integrative Descriptions of Two New Tardigrade Species along with the New Record of Mesobiotus skorackii Kaczmarek et al., 2018 from Canada

Abstract

Two new tardigrade species from a moss sample collected in Canada, one representing Macrobiotus hufelandi complex and the second one belonging to the genus Bryodelphax, are described. Integrative analysis was undertaken based on morphological and morphometric data (using both light and scanning electron microscopy (SEM)) combined with multilocus molecular analysis (nuclear sequences, i.e., 18S rRNA, 28S rRNA and ITS-2 as well as mitochondrial COI barcode sequences). Based on COI sequences, Macrobiotus birendrai sp. nov. is most similar to Mac. canaricus (p-distance 17%), whereas Bryodelphax mareki sp. nov. is most similar to Bry. parvulus (p-distance 16%). Both species differ also from their congeners in some morphological and morphometric characters of adults and/or details of egg chorion. Additionally, a large population of Mesobiotus skorackii was found in the sample and this is the first report of this species outside its terra typica in Kirghizia. The original description of this species was prepared based solely on the morphology and morphometry, therefore, here we provide updated data for this species enclosing morphometric and molecular data for the Canadian population.

Response to Tyrosine Kinase Inhibitors in Patients with BCR-ABL1 Positive Chronic Myeloid Leukemia; 13.5 Years’ Experience at Patan Hospital, Nepal

“…Although there are many controlled studies in the developed world, there are no reports of studies with long follow up in resource poor setting. We have published 4 articles with regard to response and resistance in our patients with CML [13][14][15][16]. We hypothesize that the survival in our set up is similar to well controlled studies elsewhere.…”

Two new Bryodelphax Thulin, 1928 species (Heterotardigrada: Echiniscidae) from the Republic of Ireland with comments on the ‘weglarskae group’ and other heterotardigrade taxa, including the controversial genus Bryochoerus Marcus,1936

“…-Bry. mareki is a valid species, evidently showing a unique EEs morphology, but the taxon requires a revision of the important character of ventral plate configuration, which in our examination was not in agreement with the original species description (Kayastha et al, 2021).…”

“…We interpreted this as the visible dark/black areas of the cuticular plates visible when specimens are viewed with PhC. When our results showed that these dark areas are present to some degree in all species that we examined, and that these results differed to those of Gąsiorek et al (2020a) and Kayastha et al (2021) who determined that "dark granules" are absent from the dorsal plates of some 'weglarskae group' species, we needed to investigate this character further in order to understand these discrepancies.…”

“…COI: 20.21%-20.92% (mean 20.59%), with the most similar being Bry. mareki from Canada (MW655785, Kayastha et al, 2021, to haplotype 2), and the least similar being the same sequence of Bry. mareki (to haplotype 3).…”

“…Gąsiorek et al (2020a) evaluated "dark, contrasting epicuticular granules" on dorsal plates as a present/absent character within the genus Bryodelphax. Kayastha et al (2021) use the absence of "epicuticular granules" as a distinguishing character of Bry. mareki.…”