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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Publicado:	2018
Materias:	Larvae Phylogeny Sensilla Sensory organs Water scavenger beetles beetle comparative study larva phylogenetics phylogeny sensory system taxonomy Berosus Coleoptera Hydrophilidae
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00445231_v277_n_p203_Rodriguez 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

id	paper:paper_00445231_v277_n_p203_Rodriguez
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spelling	paper:paper_00445231_v277_n_p203_Rodriguez2023-06-08T15:05:04Z Comparative analysis of diagnostic and phylogenetic chaetotaxic characters of Berosus Leach and their implications on the relationships of the tribe Berosini (Coleoptera: Hydrophilidae) 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 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00445231_v277_n_p203_Rodriguez 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 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
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)
publishDate	2018
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00445231_v277_n_p203_Rodriguez http://hdl.handle.net/20.500.12110/paper_00445231_v277_n_p203_Rodriguez
_version_	1768543411418169344

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

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