Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae)

Larvae of water scavenger beetles are found in all types of aquatic and semi-aquatic environments and play an important role in the structure of these communities. Despite their diversity, morphological characters that allow the identification of larvae at species level are usually inconspicuous. In...

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Autores principales: Rodriguez, G., Archangelsky, M., Michat, M.C., María Torres, P.L.
Formato: JOUR
Materias:
Larvae
Phylogeny
Sensilla
Sensory organs
Water scavenger beetles
beetle
comparative study
larva
phylogenetics
phylogeny
sensory system
taxonomy
Berosus
Coleoptera
Hydrophilidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00445231_v277_n_p203_Rodriguez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00445231_v277_n_p203_Rodriguez2023-10-03T14:51:42Z Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae) Rodriguez, G. Archangelsky, M. Michat, M.C. María Torres, P.L. Larvae Phylogeny Sensilla Sensory organs Water scavenger beetles beetle comparative study larva phylogenetics phylogeny sensory system taxonomy Berosus Coleoptera Hydrophilidae Larvae of water scavenger beetles are found in all types of aquatic and semi-aquatic environments and play an important role in the structure of these communities. Despite their diversity, morphological characters that allow the identification of larvae at species level are usually inconspicuous. In this paper we analyze the head capsule and mouthparts chaetotaxy of hydrophilid larvae belonging to the tribe Berosini, with the purpose of identifying variations on the external sensory organs that may be used for species delimitations. We focus on two species of Berosus Leach (Berosus festivus Berg, 1885 and Berosus patruelis Berg, 1885) and compare larval structures within Berosus and among other genera of Berosini. We include morphometric characters together with detailed illustrations of all characters, SEM images of selected structures and micrographs of a sensory organ present on the inner margin of the first antennomere which is a novelty within larval Coleoptera. Our analysis shows that the number, shape, relative position and organization of sensilla, especially those of labroclypeus and mouthparts, provide diagnostic characters for the separation of Berosus species. Also, we found a new set of characters derived from chaetotaxy that supports current phylogenetic relationships within the tribe Berosini. Most of these chaetic characters are associated with structures that have undergone strong modifications as adaptation to a benthic lifestyle in the clade Berosus + Hemiosus. © 2018 Elsevier GmbH JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00445231_v277_n_p203_Rodriguez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Larvae
Phylogeny
Sensilla
Sensory organs
Water scavenger beetles
beetle
comparative study
larva
phylogenetics
phylogeny
sensory system
taxonomy
Berosus
Coleoptera
Hydrophilidae
spellingShingle Larvae
Phylogeny
Sensilla
Sensory organs
Water scavenger beetles
beetle
comparative study
larva
phylogenetics
phylogeny
sensory system
taxonomy
Berosus
Coleoptera
Hydrophilidae
Rodriguez, G.
Archangelsky, M.
Michat, M.C.
María Torres, P.L.
Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae)
topic_facet Larvae
Phylogeny
Sensilla
Sensory organs
Water scavenger beetles
beetle
comparative study
larva
phylogenetics
phylogeny
sensory system
taxonomy
Berosus
Coleoptera
Hydrophilidae
description Larvae of water scavenger beetles are found in all types of aquatic and semi-aquatic environments and play an important role in the structure of these communities. Despite their diversity, morphological characters that allow the identification of larvae at species level are usually inconspicuous. In this paper we analyze the head capsule and mouthparts chaetotaxy of hydrophilid larvae belonging to the tribe Berosini, with the purpose of identifying variations on the external sensory organs that may be used for species delimitations. We focus on two species of Berosus Leach (Berosus festivus Berg, 1885 and Berosus patruelis Berg, 1885) and compare larval structures within Berosus and among other genera of Berosini. We include morphometric characters together with detailed illustrations of all characters, SEM images of selected structures and micrographs of a sensory organ present on the inner margin of the first antennomere which is a novelty within larval Coleoptera. Our analysis shows that the number, shape, relative position and organization of sensilla, especially those of labroclypeus and mouthparts, provide diagnostic characters for the separation of Berosus species. Also, we found a new set of characters derived from chaetotaxy that supports current phylogenetic relationships within the tribe Berosini. Most of these chaetic characters are associated with structures that have undergone strong modifications as adaptation to a benthic lifestyle in the clade Berosus + Hemiosus. © 2018 Elsevier GmbH
format JOUR
author Rodriguez, G.
Archangelsky, M.
Michat, M.C.
María Torres, P.L.
author_facet Rodriguez, G.
Archangelsky, M.
Michat, M.C.
María Torres, P.L.
author_sort Rodriguez, G.
title Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae)
title_short Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae)
title_full Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae)
title_fullStr Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae)
title_full_unstemmed Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae)
title_sort comparative analysis of diagnostic and phylogenetic chaetotaxic characters of berosus leach and their implications on the relationships of the tribe berosini (coleoptera: hydrophilidae)
url http://hdl.handle.net/20.500.12110/paper_00445231_v277_n_p203_Rodriguez
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AT michatmc comparativeanalysisofdiagnosticandphylogeneticchaetotaxiccharactersofberosusleachandtheirimplicationsontherelationshipsofthetribeberosinicoleopterahydrophilidae
AT mariatorrespl comparativeanalysisofdiagnosticandphylogeneticchaetotaxiccharactersofberosusleachandtheirimplicationsontherelationshipsofthetribeberosinicoleopterahydrophilidae
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