ZawieruchaKrzysztofDziamięckiJakubJakubowskaNataliaMichalczykŁukaszKaczmarekŁukaszNew tardigrade records for the Baltic states with a description of Minibiotus formosus sp. n. (Eutardigrada, Macrobiotidae)Zookeys135201420144088110510.3897/zookeys.408.6612 Paramacrobiotus richtersi (Murray, 1911)Localities and specimen numbers.

XI: 2 specimens (including 1 simplex) and 1 egg.

Remarks.

Paramacrobiotus species (until recently a collection of species within Macrobiotus) can be divided into three groups: areolatus, huziori and richtersi, with respect to the combination of two traits: the presence/absence of the microplacoid in the pharynx and the type of egg areolation. Paramacrobiotus richtersi, considered cosmopolitan, is recognised as the nominal species for a group of very similar taxa that require careful taxonomic examination of adults and egg morphology for correct identification. In the last decade many new species of this group have been described from various localities (e.g. Pilato et al. 2004, Kaczmarek et al. 2005, Tumanov 2005b, Michalczyk and Kaczmarek 2006a, b, Michalczyk et al. 2006, Pilato et al. 2006a, b, Degma et al. 2008, Bartels et al. 2009, Pilato et al. 2012), with more recent additions including molecular data (Guidetti et al. 2009, Schill et al. 2010).

PilatoGBindaMGLisiO (2004) Notes on tardigrades of the Seychelles with the description of three new species.Italian Journal of Zoology71: 171-178. doi: 10.1080/11250000409356569KaczmarekŁMichalczykŁDiduszkoD (2005) Some tardigrades from Siberia (Russia, Baikal region) with a description of Macrobiotus garynahi sp. n. (Eutardigrada: Macrobiotidae: richtersi group).Zootaxa1053: 35-45.TumanovDV (2005b) Notes on the Tardigrada of Thailand, with description of Macrobiotus alekseevi sp. n. (Eutardigrada, Macrobiotidae).Zootaxa999: 1-16.MichalczykŁKaczmarekŁ (2006a) Macrobiotus huziori, a new species of Tardigrada (Eutardigrada: Macrobiotidae) from Costa Rica (Central America).Zootaxa1169: 47-59.MichalczykŁKaczmarekŁ (2006b) A new species Macrobiotus magdalenae (Tardigrada: Eutardigrada: Macrobiotidae, richtersi group) from Costa Rican rain forest (Central America).New Zealand Journal of Zoology33: 189-196. doi: 10.1080/03014223.2006.9518444MichalczykŁKaczmarekŁWeglarskaeB (2006) Macrobiotus sklodowskae sp. n. (Tardigrada: Eutardigrada: Macrobiotidae, richtersi group) from Cyprus.Zootaxa1371: 45-46.PilatoGBindaMGLisiO (2006a) Three new species of eutardigrades from the Seychelles.New Zealand Journal of Zoology33: 39-48. doi: 10.1080/03014223.2006.9518429PilatoGBindaMGLisiO (2006b) Eutardigrada from New Zealand, with descriptions of two new species.New Zealand Journal of Zoology33: 49-63. doi: 10.1080/03014223.2006.9518430DegmaPMichalczykŁKaczmarekŁ (2008) Macrobiotus derkai, a new species of Tardigrada (Eutardigrada, Macrobiotidae, huzori group) from the Colombian Andes (South America).Zootaxa1731: 1-23.BartelsPJPilatoGLisiONelsonDR (2009) Macrobiotus (Eutardigrada, Macrobiotidae) from the Great Smoky Mountains National Park, Tennessee/North Carolina, USA (North America): two new species and six new records.Zootaxa202: 45-57.PilatoGKiosyaYLisiOSabellaG (2012) New records of Eutardigrada from Belarus with the description of three new species.Zootaxa3179: 39-60.GuidettiRSchillROBertolaniRDandekarTWolfM (2009) New molecular data for tardigrade phylogeny, with the erection of Paramacrobiotus gen. nov.Journal of Zoological Systematics and Evolutionary Research47: 315-321. doi: 10.1111/j.1439-0469.2009.00526.xSchillROForsterFDandekarTWolfN (2010) Using compensatory base change analysis of internal transcribed spacer 2 secondary structures to identify three new species in Paramacrobiotus (Tardigrada).Organisms Diversity & Evolution10(4): 287-296. doi: 10.1007/s13127-010-0025-z