Species of the genus Bertolanius (Eohypsibiidae, Eohypsibioidea) are morphologically very similar and can be distinguished by only minute differences. During faunal surveys in Arctic areas (Disko I., Greenland; Uummannaq, Greenland; Abisko, Sweden), the four species Bertolanius nebulosus, Bertolanius smreczynskii, Bertolanius weglarskae and Bertolanius birnae sp. nov. were found. Bertolanius nebulosus and Bertolaniussmreczynskii have been compared with their paratypes, and type material of other species of Bertolanius has been considered for comparison within the genus. Bertolaniusbirnae sp. nov. possesses a unique combination of characters (i.e., an evident anterior band of teeth, the median ridge of the buccal armature consisting of two large teeth instead of one, absence of eyes, and eggs with conical processes without areolation around their bases) that is not seen in any other species in the genus, though these characters may be present in other combinations within the genus. Our revision and analytical comparison among these Bertolanius species adds new and important information on claw, buccal armature, egg surface morphologies as well as the encystment process of the species. We also provide a taxonomic key to aid the identification of Bertolanius species. The new discoveries of Bertolanius species from northern polar regions further support the hypothesis that the distribution of Eohypsibioidea is restricted to the Holarctic in the Arctic and Periarctic areas, or in alpine areas between 550 and 2400 m a.s.l. of more temperate regions.

Comparative analyses of Bertolanius species (Eohypsibiidae; Eutardigrada) with the description of Bertolaniusbirnae sp. nov. from northern polar regions / Hansen, Jesper Guldberg; Kristensen, Reinhardt Møbjerg; Bertolani, Roberto; Guidetti, Roberto. - In: POLAR BIOLOGY. - ISSN 0722-4060. - STAMPA. - 40:1(2017), pp. 123-140. [10.1007/s00300-016-1931-0]

Comparative analyses of Bertolanius species (Eohypsibiidae; Eutardigrada) with the description of Bertolaniusbirnae sp. nov. from northern polar regions

BERTOLANI, Roberto;GUIDETTI, Roberto
2017-01-01

Abstract

Species of the genus Bertolanius (Eohypsibiidae, Eohypsibioidea) are morphologically very similar and can be distinguished by only minute differences. During faunal surveys in Arctic areas (Disko I., Greenland; Uummannaq, Greenland; Abisko, Sweden), the four species Bertolanius nebulosus, Bertolanius smreczynskii, Bertolanius weglarskae and Bertolanius birnae sp. nov. were found. Bertolanius nebulosus and Bertolaniussmreczynskii have been compared with their paratypes, and type material of other species of Bertolanius has been considered for comparison within the genus. Bertolaniusbirnae sp. nov. possesses a unique combination of characters (i.e., an evident anterior band of teeth, the median ridge of the buccal armature consisting of two large teeth instead of one, absence of eyes, and eggs with conical processes without areolation around their bases) that is not seen in any other species in the genus, though these characters may be present in other combinations within the genus. Our revision and analytical comparison among these Bertolanius species adds new and important information on claw, buccal armature, egg surface morphologies as well as the encystment process of the species. We also provide a taxonomic key to aid the identification of Bertolanius species. The new discoveries of Bertolanius species from northern polar regions further support the hypothesis that the distribution of Eohypsibioidea is restricted to the Holarctic in the Arctic and Periarctic areas, or in alpine areas between 550 and 2400 m a.s.l. of more temperate regions.
2017
22-mar-2016
40
1
123
140
Comparative analyses of Bertolanius species (Eohypsibiidae; Eutardigrada) with the description of Bertolaniusbirnae sp. nov. from northern polar regions / Hansen, Jesper Guldberg; Kristensen, Reinhardt Møbjerg; Bertolani, Roberto; Guidetti, Roberto. - In: POLAR BIOLOGY. - ISSN 0722-4060. - STAMPA. - 40:1(2017), pp. 123-140. [10.1007/s00300-016-1931-0]
Hansen, Jesper Guldberg; Kristensen, Reinhardt Møbjerg; Bertolani, Roberto; Guidetti, Roberto
File in questo prodotto:
File Dimensione Formato  
Hansen et al 2016 B birnae.pdf

Accesso riservato

Tipologia: Versione pubblicata dall'editore
Dimensione 3.44 MB
Formato Adobe PDF
3.44 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1111054
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 8
social impact