From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)

Fernández-Simón, Jose; Jörger, Katharina M.; Brenzinger, Bastian; Schrödl, Michael; Wilson, Nerida G.; Neusser, Timea P.; Moles, Juan

From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)

The repeated colonisation of non-marine environments in panpulmonate molluscs represents a major evolutionary transition, yet many lineages remain poorly understood. Among gastropods, Acochlidimorpha stands out for its ecological and morphological diversity, originating in marine interstitial habita...

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Detalles Bibliográficos
Autores:	Fernández-Simón, Jose, Jörger, Katharina M., Brenzinger, Bastian, Schrödl, Michael, Wilson, Nerida G., Neusser, Timea P., Moles, Juan
Tipo de recurso:	artículo
Estado:	Versión aceptada para publicación
Fecha de publicación:	2025
País:	España
Institución:	Universidad de Barcelona
Repositorio:	Dipòsit Digital de la UB
OAI Identifier:	oai:diposit.ub.edu:2445/223495
Acceso en línea:	https://hdl.handle.net/2445/223495
Access Level:	acceso embargado
Palabra clave:	Genòmica Evolució Gastròpodes Genomics Evolution Gastropods

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spelling	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)Fernández-Simón, JoseJörger, Katharina M.Brenzinger, BastianSchrödl, MichaelWilson, Nerida G.Neusser, Timea P.Moles, JuanGenòmicaEvolucióGastròpodesGenomicsEvolutionGastropodsThe repeated colonisation of non-marine environments in panpulmonate molluscs represents a major evolutionary transition, yet many lineages remain poorly understood. Among gastropods, Acochlidimorpha stands out for its ecological and morphological diversity, originating in marine interstitial habitats before independently invading freshwater and terrestrial ecosystems. Here, we present the most complete phylogeny of Acochlidimorpha to date based on a global taxon sampling collected over several decades. We integrate ultra-conserved element (UCE) data from 58 museum-preserved specimens—comprising over 1,700 nuclear loci—with all publicly available Sanger-sequencing markers, totalling more than 150 specimens. This pioneering approach sets a new benchmark for phylogenomic studies in minute molluscan lineages. Our results resolve long-standing systematic ambiguities, reinstating Pontohedylidae stat. rest. and Strubelliidae stat. rest. and establishing Helicohedylidae fam. nov. Within Acochlidioidea, Strubelliidae is recovered as the sister to Pseudunelidae + (Tantulidae + Acochlidiidae). At the species level, we clarify the position of key taxa, including Asperspina loricata and two unidentified species of Hedylopsis. Ancestral habitat reconstruction analyses reveal at least four independent transitions to freshwater and terrestrial environments, highlighting the anatomical innovations facilitating these shifts. Altogether, our study provides a robust evolutionary framework for Acochlidimorpha, offering new insights into the processes underlying terrestrialisation, morphological evolution, and ecological diversification in a lineage characterised by both extreme miniaturisation and evolutionary dynamism.Elsevier2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/223495Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: https://doi.org/10.1016/j.ympev.2025.108443Molecular Phylogenetics and Evolution, 2025, vol. 213, p. 1-13https://doi.org/10.1016/j.ympev.2025.108443cc-by-nc-nd (c) Elsevier, 2025http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/embargoedAccessoai:diposit.ub.edu:2445/2234952026-05-27T06:46:51Z
dc.title.none.fl_str_mv	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)
title	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)
spellingShingle	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia) Fernández-Simón, Jose Genòmica Evolució Gastròpodes Genomics Evolution Gastropods
title_short	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)
title_full	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)
title_fullStr	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)
title_full_unstemmed	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)
title_sort	From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)
dc.creator.none.fl_str_mv	Fernández-Simón, Jose Jörger, Katharina M. Brenzinger, Bastian Schrödl, Michael Wilson, Nerida G. Neusser, Timea P. Moles, Juan
author	Fernández-Simón, Jose
author_facet	Fernández-Simón, Jose Jörger, Katharina M. Brenzinger, Bastian Schrödl, Michael Wilson, Nerida G. Neusser, Timea P. Moles, Juan
author_role	author
author2	Jörger, Katharina M. Brenzinger, Bastian Schrödl, Michael Wilson, Nerida G. Neusser, Timea P. Moles, Juan
author2_role	author author author author author author
dc.subject.none.fl_str_mv	Genòmica Evolució Gastròpodes Genomics Evolution Gastropods
topic	Genòmica Evolució Gastròpodes Genomics Evolution Gastropods
description	The repeated colonisation of non-marine environments in panpulmonate molluscs represents a major evolutionary transition, yet many lineages remain poorly understood. Among gastropods, Acochlidimorpha stands out for its ecological and morphological diversity, originating in marine interstitial habitats before independently invading freshwater and terrestrial ecosystems. Here, we present the most complete phylogeny of Acochlidimorpha to date based on a global taxon sampling collected over several decades. We integrate ultra-conserved element (UCE) data from 58 museum-preserved specimens—comprising over 1,700 nuclear loci—with all publicly available Sanger-sequencing markers, totalling more than 150 specimens. This pioneering approach sets a new benchmark for phylogenomic studies in minute molluscan lineages. Our results resolve long-standing systematic ambiguities, reinstating Pontohedylidae stat. rest. and Strubelliidae stat. rest. and establishing Helicohedylidae fam. nov. Within Acochlidioidea, Strubelliidae is recovered as the sister to Pseudunelidae + (Tantulidae + Acochlidiidae). At the species level, we clarify the position of key taxa, including Asperspina loricata and two unidentified species of Hedylopsis. Ancestral habitat reconstruction analyses reveal at least four independent transitions to freshwater and terrestrial environments, highlighting the anatomical innovations facilitating these shifts. Altogether, our study provides a robust evolutionary framework for Acochlidimorpha, offering new insights into the processes underlying terrestrialisation, morphological evolution, and ecological diversification in a lineage characterised by both extreme miniaturisation and evolutionary dynamism.
publishDate	2025
dc.date.none.fl_str_mv	2025
dc.type.none.fl_str_mv	info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion
format	article
status_str	acceptedVersion
dc.identifier.none.fl_str_mv	https://hdl.handle.net/2445/223495
url	https://hdl.handle.net/2445/223495
dc.language.none.fl_str_mv	Inglés
language_invalid_str_mv	Inglés
dc.relation.none.fl_str_mv	Versió postprint del document publicat a: https://doi.org/10.1016/j.ympev.2025.108443 Molecular Phylogenetics and Evolution, 2025, vol. 213, p. 1-13 https://doi.org/10.1016/j.ympev.2025.108443
dc.rights.none.fl_str_mv	cc-by-nc-nd (c) Elsevier, 2025 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/embargoedAccess
rights_invalid_str_mv	cc-by-nc-nd (c) Elsevier, 2025 http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv	embargoedAccess
dc.format.none.fl_str_mv	application/pdf
dc.publisher.none.fl_str_mv	Elsevier
publisher.none.fl_str_mv	Elsevier
dc.source.none.fl_str_mv	Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona
instname_str	Universidad de Barcelona
reponame_str	Dipòsit Digital de la UB
collection	Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score	15,811543

From marine sand to land and rivers: A combined phylogenomic strategy unveils the evolution of minute Acochlidimorpha slugs (Gastropoda: Heterobranchia)

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