Phylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)

Abstract Tardigrades constitute a micrometazoan phylum usually considered as taxonomically challenging and therefore difficult for biogeographic analyses. The genus Pseudechiniscus, the second most speciose member of the family Echiniscidae, is commonly regarded as a particularly difficult taxon for...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Piotr Gąsiorek, Katarzyna Vončina, Krzysztof Zając, Łukasz Michalczyk
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/55724bbbd8a542dda40e698fc4ddd135
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:55724bbbd8a542dda40e698fc4ddd135
record_format	dspace
spelling	oai:doaj.org-article:55724bbbd8a542dda40e698fc4ddd1352021-12-02T14:37:29ZPhylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)10.1038/s41598-021-84910-62045-2322https://doaj.org/article/55724bbbd8a542dda40e698fc4ddd1352021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84910-6https://doaj.org/toc/2045-2322Abstract Tardigrades constitute a micrometazoan phylum usually considered as taxonomically challenging and therefore difficult for biogeographic analyses. The genus Pseudechiniscus, the second most speciose member of the family Echiniscidae, is commonly regarded as a particularly difficult taxon for studying due to its rarity and homogenous sculpturing of the dorsal plates. Recently, wide geographic ranges for some representatives of this genus and a new hypothesis on the subgeneric classification have been suggested. In order to test these hypotheses, we sequenced 65 Pseudechiniscus populations extracted from samples collected in 19 countries distributed on 5 continents, representing the Neotropical, Afrotropical, Holarctic, and Oriental realms. The deep subdivision of the genus into the cosmopolitan suillus-facettalis clade and the mostly tropical-Gondwanan novaezeelandiae clade is demonstrated. Meridioniscus subgen. nov. is erected to accommodate the species belonging to the novaezeelandiae lineage characterised by dactyloid cephalic papillae that are typical for the great majority of echiniscids (in contrast to pseudohemispherical papillae in the suillus-facettalis clade, corresponding to the subgenus Pseudechiniscus). Moreover, the evolution of morphological traits (striae between dorsal pillars, projections on the pseudosegmental plate IV’, ventral sculpturing pattern) crucial in the Pseudechiniscus taxonomy is reconstructed. Furthermore, broad distributions are emphasised as characteristic of some taxa. Finally, the Malay Archipelago and Indochina are argued to be the place of origin and extensive radiation of Pseudechiniscus.Piotr GąsiorekKatarzyna VončinaKrzysztof ZającŁukasz MichalczykNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Piotr Gąsiorek Katarzyna Vončina Krzysztof Zając Łukasz Michalczyk Phylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)
description	Abstract Tardigrades constitute a micrometazoan phylum usually considered as taxonomically challenging and therefore difficult for biogeographic analyses. The genus Pseudechiniscus, the second most speciose member of the family Echiniscidae, is commonly regarded as a particularly difficult taxon for studying due to its rarity and homogenous sculpturing of the dorsal plates. Recently, wide geographic ranges for some representatives of this genus and a new hypothesis on the subgeneric classification have been suggested. In order to test these hypotheses, we sequenced 65 Pseudechiniscus populations extracted from samples collected in 19 countries distributed on 5 continents, representing the Neotropical, Afrotropical, Holarctic, and Oriental realms. The deep subdivision of the genus into the cosmopolitan suillus-facettalis clade and the mostly tropical-Gondwanan novaezeelandiae clade is demonstrated. Meridioniscus subgen. nov. is erected to accommodate the species belonging to the novaezeelandiae lineage characterised by dactyloid cephalic papillae that are typical for the great majority of echiniscids (in contrast to pseudohemispherical papillae in the suillus-facettalis clade, corresponding to the subgenus Pseudechiniscus). Moreover, the evolution of morphological traits (striae between dorsal pillars, projections on the pseudosegmental plate IV’, ventral sculpturing pattern) crucial in the Pseudechiniscus taxonomy is reconstructed. Furthermore, broad distributions are emphasised as characteristic of some taxa. Finally, the Malay Archipelago and Indochina are argued to be the place of origin and extensive radiation of Pseudechiniscus.
format	article
author	Piotr Gąsiorek Katarzyna Vončina Krzysztof Zając Łukasz Michalczyk
author_facet	Piotr Gąsiorek Katarzyna Vončina Krzysztof Zając Łukasz Michalczyk
author_sort	Piotr Gąsiorek
title	Phylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)
title_short	Phylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)
title_full	Phylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)
title_fullStr	Phylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)
title_full_unstemmed	Phylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)
title_sort	phylogeography and morphological evolution of pseudechiniscus (heterotardigrada: echiniscidae)
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/55724bbbd8a542dda40e698fc4ddd135
work_keys_str_mv	AT piotrgasiorek phylogeographyandmorphologicalevolutionofpseudechiniscusheterotardigradaechiniscidae AT katarzynavoncina phylogeographyandmorphologicalevolutionofpseudechiniscusheterotardigradaechiniscidae AT krzysztofzajac phylogeographyandmorphologicalevolutionofpseudechiniscusheterotardigradaechiniscidae AT łukaszmichalczyk phylogeographyandmorphologicalevolutionofpseudechiniscusheterotardigradaechiniscidae
_version_	1718391006018142208

Phylogeography and morphological evolution of Pseudechiniscus (Heterotardigrada: Echiniscidae)

Ejemplares similares