Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from Madagascar

The knowledge of the diversity and distribution of tardigrades on Madagascar is rather poor. To date, only 13 tardigrade taxa have been reported from this region (including one Milnesium species). We examined 46 specimens belonging to two new-to-science species of the genus Milnesi...

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Main Authors: Łukasz Kaczmarek, Daria Grobys, Adam Kulpa, Tomasz Bartylak, Hanna Kmita, Marta Kepel, Andrzej Kepel, Milena Roszkowska
Format: Article
Language:English
Published: Pensoft Publishers 2019-10-01
Series:ZooKeys
Online Access:https://zookeys.pensoft.net/article/29469/download/pdf/
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spelling doaj-85156b4e84fd423ca2b6e916e0d412f32020-11-24T22:02:23ZengPensoft PublishersZooKeys1313-29891313-29702019-10-0188412210.3897/zookeys.884.2946929469Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from MadagascarŁukasz Kaczmarek0Daria Grobys1Adam Kulpa2Tomasz Bartylak3Hanna Kmita4Marta Kepel5Andrzej Kepel6Milena Roszkowska7Adam Mickiewicz UniversityAdam Mickiewicz UniversityAdam Mickiewicz UniversityAdam Mickiewicz UniversityAdam Mickiewicz UniversityPolish Society for Nature Conservation “Salamandra”Polish Society for Nature Conservation “Salamandra”Adam Mickiewicz University The knowledge of the diversity and distribution of tardigrades on Madagascar is rather poor. To date, only 13 tardigrade taxa have been reported from this region (including one Milnesium species). We examined 46 specimens belonging to two new-to-science species of the genus Milnesium described herein using an integrative approach, including classical morphology and molecular marker (COI, ITS-2 and 28S rRNA) analysis. The species were found in two moss and lichen samples collected in the Ivohibory forest in Fianarantsoa Province. Milnesium matheusi sp. nov., with claw configuration [3-3]–[3-3] and rather wide buccal tube, morphologically is most similar to: Mil. beatae Roszkowska, Ostrowska & Kaczmarek, 2015, Mil. bohleberi Bartels, Nelson, Kaczmarek & Michalczyk, 2014, Mil. eurystomum Maucci, 1991, Mil. shilohae Meyer, 2015 and Mil. tumanovi Pilato, Sabella & Lisi, 2016; however, it differs from these by morphometric characteristics. Milnesium wrightae sp. nov., by the presence of four points on secondary branches of claws IV, is most similar to Mil. quadrifidum Nederström, 1919. However, Mil. wrightae sp. nov. differs from Mil. quadrifidum by claw configuration ([4-4]–[4-4] in Mil. quadrifidum vs. [3-3]–[4-4] in Mil. wrightae sp. nov.), but also by the position of the fourth points on secondary branches of claws IV, which are located near the base of the claw in the new species and near the top of the claw in Mil. quadrifidum. Genotypic analysis showed that Mil. matheusi sp. nov. is most similar to Milnesium sp. (28S rRNA), Mil. variefidum (COI) and Mil. t. tardigradum (ITS-2) while Mil. wrightae sp. nov. is most similar to Milnesium sp. (28S rRNA), Mil. variefidum (COI) and Mil. matheusi (ITS-2). Five Milnesium taxa are recorded from the African region, including the two new species from Madagascar reported in this study. https://zookeys.pensoft.net/article/29469/download/pdf/
collection DOAJ
language English
format Article
sources DOAJ
author Łukasz Kaczmarek
Daria Grobys
Adam Kulpa
Tomasz Bartylak
Hanna Kmita
Marta Kepel
Andrzej Kepel
Milena Roszkowska
spellingShingle Łukasz Kaczmarek
Daria Grobys
Adam Kulpa
Tomasz Bartylak
Hanna Kmita
Marta Kepel
Andrzej Kepel
Milena Roszkowska
Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from Madagascar
ZooKeys
author_facet Łukasz Kaczmarek
Daria Grobys
Adam Kulpa
Tomasz Bartylak
Hanna Kmita
Marta Kepel
Andrzej Kepel
Milena Roszkowska
author_sort Łukasz Kaczmarek
title Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from Madagascar
title_short Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from Madagascar
title_full Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from Madagascar
title_fullStr Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from Madagascar
title_full_unstemmed Two new species of the genus Milnesium Doyère, 1840 (Tardigrada, Apochela, Milnesiidae) from Madagascar
title_sort two new species of the genus milnesium doyère, 1840 (tardigrada, apochela, milnesiidae) from madagascar
publisher Pensoft Publishers
series ZooKeys
issn 1313-2989
1313-2970
publishDate 2019-10-01
description The knowledge of the diversity and distribution of tardigrades on Madagascar is rather poor. To date, only 13 tardigrade taxa have been reported from this region (including one Milnesium species). We examined 46 specimens belonging to two new-to-science species of the genus Milnesium described herein using an integrative approach, including classical morphology and molecular marker (COI, ITS-2 and 28S rRNA) analysis. The species were found in two moss and lichen samples collected in the Ivohibory forest in Fianarantsoa Province. Milnesium matheusi sp. nov., with claw configuration [3-3]–[3-3] and rather wide buccal tube, morphologically is most similar to: Mil. beatae Roszkowska, Ostrowska & Kaczmarek, 2015, Mil. bohleberi Bartels, Nelson, Kaczmarek & Michalczyk, 2014, Mil. eurystomum Maucci, 1991, Mil. shilohae Meyer, 2015 and Mil. tumanovi Pilato, Sabella & Lisi, 2016; however, it differs from these by morphometric characteristics. Milnesium wrightae sp. nov., by the presence of four points on secondary branches of claws IV, is most similar to Mil. quadrifidum Nederström, 1919. However, Mil. wrightae sp. nov. differs from Mil. quadrifidum by claw configuration ([4-4]–[4-4] in Mil. quadrifidum vs. [3-3]–[4-4] in Mil. wrightae sp. nov.), but also by the position of the fourth points on secondary branches of claws IV, which are located near the base of the claw in the new species and near the top of the claw in Mil. quadrifidum. Genotypic analysis showed that Mil. matheusi sp. nov. is most similar to Milnesium sp. (28S rRNA), Mil. variefidum (COI) and Mil. t. tardigradum (ITS-2) while Mil. wrightae sp. nov. is most similar to Milnesium sp. (28S rRNA), Mil. variefidum (COI) and Mil. matheusi (ITS-2). Five Milnesium taxa are recorded from the African region, including the two new species from Madagascar reported in this study.
url https://zookeys.pensoft.net/article/29469/download/pdf/
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