Mesobiotus philippinicus sp. nov., the first limnoterrestrial tardigrade from the Philippines

Mapalo, Marc A.; Stec, Daniel; Mirano-Bascos, Denise; Michalczyk, Łukasz

doi:10.11646/zootaxa.4126.3.6

Cited by 26 publications

(18 citation statements)

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“…recens, phylogenetic trees were constructed using (1) all macrobiotid 18S rRNA sequences available from GenBank, (2) concatenated 18S rRNA+28S rRNA+ITS-2+COI sequences of macrobiotid species for which at least three of these markers were sequenced, and (3) all published M. hufelandi group COI sequences. In addition to the sequences of the hufelandi group listed in Table 3, we also used sequences of other species of the family Macrobiotidae published so far: Sands et al (2008), Guidetti et al (2009), Guil & Giribet (2012, Bertolani et al (2014), Mapalo et al (2016), Vecchi et al (2016), Zawierucha et al (2016), Mapalo et al (2017), Stec & Kristensen (2017), Stec et al (2018b). The sequences of Milnesium variefidum Morek et al, 2016aand Mi.…”

Section: Phylogenetic Analysismentioning

confidence: 99%

Integrative description of Macrobiotus canaricus sp. nov. with notes on M. recens (Eutardigrada: Macrobiotidae)

Stec

Krzywański

Michalczyk

2018

EJT

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681

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Abstract. In this paper we describe Macrobiotus canaricus sp. nov., a new tardigrade species of the Macrobiotus hufelandi group from the Canary Islands. Moreover, with the use of DNA sequencing, we confirm that Macrobiotus recens Cuénot, 1932 represents the hufelandi group, even though eggs laid by this species do not exhibit the typical hufelandi group morphology. Our study is based on both classical taxonomic methods that include morphological and morphometric analyses conducted with the use of light and scanning electron microscopy, and on the analysis of nucleotide sequences of four molecular markers (three nuclear: 18S rRNA, 28S rRNA, ITS-2, and one mitochondrial: COI). Our analyses revealed that M. canaricus sp. nov. is most similar to Macrobiotus almadai Fontoura et al., 2008 from the Archipelago of the Azores, from which it differs by the absence of granulation patches on the external and internal surfaces of legs I-III as well as by the absence of a cuticular pore in the centre of the external patch on legs I-III. Molecular sequences allowed us to pinpoint the phylogenetic positions of M. canaricus sp. nov. and M. recens within the M. hufelandi group.

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Section: Phylogenetic Analysismentioning

confidence: 99%

Integrative description of Macrobiotus canaricus sp. nov. with notes on M. recens (Eutardigrada: Macrobiotidae)

Stec

Krzywański

Michalczyk

2018

EJT

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681

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“…Mesobiotus nikolaevae sp.n. differs from M. philippinicus Mapalo et al, 2016 (known only from type locality in Philippines) by having stylet supports inserted to the buccal tube in slightly more cephalic position (ptSs 75-76.7% in M. nikolaevae sp.n. and 76.4-79.8% in M. philippinicus), by having undivided medio-ventral ridge of the buccal armature (medio-ventral ridge is splitted into 2-4 round or oval teeth in M. philippinicus), by having lower pt of the length of the claws (pt for external claws II is 21.9-28.6% in M. nikolaevae sp.n.…”

Section: Descriptionmentioning

confidence: 89%

Mesobiotus nikolaevae sp.n. (Eutardigrada: Macrobiotidae), a new species of Tardigrada from Croatia

Tumanov

2018

Invertzool

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An illustrated description of Mesobiotus nikolaevae sp.n. (Mesobiotus harmsworthi-group) from Croatia is given. The new species has eyes, smooth cuticle, buccal armature with evident anterior band of teeth, a posterior crown of elongated triangular teeth and a system of three dorsal and three ventral transverse ridges, granulation on all legs and lunules of legs IV without dentation or crenation. This species belongs to Mesobiotus coronatus complex of species by having reticulated conical egg processes with basal ring of short ridges/thickenings. It differs from all known species of this group by having reticulation of the egg surface between the egg processes. How to cite this article:

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“…insanis Mapalo, Stec, Mirano-Bascos & Michalczyk, 2017 [ 35 ], M . philippinicus Mapalo, Stec, Mirano-Bascos & Michalczyk, 2016 [ 36 ], M . pseudoblocki Roszkowska, Stec, Ciobanu & Kaczmarek, 2016 [ 37 ], M .…”

Section: Methodsmentioning

confidence: 99%

An integrative redescription of the nominal taxon for the Mesobiotus harmsworthi group (Tardigrada: Macrobiotidae) leads to descriptions of two new Mesobiotus species from Arctic

et al. 2018

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The Mesobiotus harmsworthi group has a global distribution, with localities in polar, temperate and tropical zones. Since the first species of the harmsworthi group was described in the beginning of the 20th century, tens of new species within the group were found and named. However, the diagnosis of the nominal Mesobiotus harmsworthi is insufficient and enigmatic, thus it can be is a serious obstacle in solving the taxonomy of this group. Here, we integratively redescribe the nominal species for the genus Mesobiotus, i.e., Mesobiotus harmsworthi and clarify taxonomic statuses of the two subspecies: M. harmsworthi harmsworthi and M. harmsworthi obscurus that have been recognised as distinct taxa for more than three decades. Traditionally, egg chorion in M. harmsworthi was considered almost smooth and without any traces of areolation, however here we report many misunderstandings that accumulated across decades and we show that, in fact, the chorion in this species exhibits a partially developed areolation. We present an integrative (morphological, morphometric and molecular) diagnosis of the nominal taxon and we confirm that it differs from other species of the harmsworthi group by morphological characters of both animals and eggs. Additionally, we describe two new species of the genus Mesobiotus: M. skorackii sp. nov. from the Kyrgyz Republic (using classical morphological description) and M. occultatus sp. nov. from Svalbard Archipelago (by means of integrative taxonomy). Finally, we also provide the first genetic phylogeny of the genus Mesobiotus based on COI sequences which, together with molecular species delimitation, independently confirms the validity of the analysed taxa.

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Mesobiotus philippinicus sp. nov., the first limnoterrestrial tardigrade from the Philippines

Cited by 26 publications

References 0 publications

Integrative description of Macrobiotus canaricus sp. nov. with notes on M. recens (Eutardigrada: Macrobiotidae)

Integrative description of Macrobiotus canaricus sp. nov. with notes on M. recens (Eutardigrada: Macrobiotidae)

Mesobiotus nikolaevae sp.n. (Eutardigrada: Macrobiotidae), a new species of Tardigrada from Croatia

An integrative redescription of the nominal taxon for the Mesobiotus harmsworthi group (Tardigrada: Macrobiotidae) leads to descriptions of two new Mesobiotus species from Arctic

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