Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae)

Phylogenetic relationships within diving beetles (Dytiscidae) are imperfectly known. In particular, some authors have considered that the tribe Methlini is included in the subfamily Hydroporinae (a large group including about half of the dytiscid species worldwide), whereas others have argued in fav...

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Detalles Bibliográficos
Publicado: 2007
Materias:
beetle
larva
morphology
morphometry
phylogeny
Celina
Celina imitatrix
Coleoptera
Dytiscidae
Hydroporinae
Hydroporini
Hydrovatini
Hygrobiidae
Laccornini
Methlini
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14455226_v21_n3_p239_Michat
http://hdl.handle.net/20.500.12110/paper_14455226_v21_n3_p239_Michat
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14455226_v21_n3_p239_Michat
record_format dspace
spelling paper:paper_14455226_v21_n3_p239_Michat2023-06-08T16:16:07Z Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae) beetle larva morphology morphometry phylogeny Celina Celina imitatrix Coleoptera Dytiscidae Hydroporinae Hydroporini Hydrovatini Hygrobiidae Laccornini Methlini Phylogenetic relationships within diving beetles (Dytiscidae) are imperfectly known. In particular, some authors have considered that the tribe Methlini is included in the subfamily Hydroporinae (a large group including about half of the dytiscid species worldwide), whereas others have argued in favour of excluding Methlini from the Hydroporinae and giving it subfamilial rank. Larval characters have been underutilised in phylogenetic studies, mainly because the larvae of many taxa within the family are still unknown. The larval morphology of the dytiscid tribe Methlini, in particular, remains poorly known. In this study, the phylogenetic relationships among ancestral lineages of the Hydroporinae are investigated based on a cladistic analysis of 34 taxa and 127 morphological larval characters. For this purpose, larvae of the Methlini (Celina parallela (Babington, 1841)) and C. imitatrix Young, 1979) are described and illustrated in detail for the first time, with particular emphasis on morphometry and chaetotaxy. The results show high support for a monophyletic origin of the Hydroporinae, including Methlini, based on eight unique character states. Giving Methlini subfamily rank would leave Hydroporinae with a single unique larval apomorphy. This supports the inclusion of Methlini as a tribe of Hydroporinae. Other interesting but less well supported results include: 1, the clade Laccornini + Hydrovatini + Canthyporus Zimmermann, 1919 (Hydroporini) resolved as the sister-group to the other Hydroporinae minus Methlini; and 2, Hydrovatini and Canthyporus resolved as sister-groups. The presence of a galea, albeit in a reduced form, in larvae of Methlini, Laccornini and Hydrovatini is of the utmost interest. The putative hypothesis of an ancestral position for these genera within Hydroporinae suggests that hydroporines lost the galea secondarily. © CSIRO 2007. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14455226_v21_n3_p239_Michat http://hdl.handle.net/20.500.12110/paper_14455226_v21_n3_p239_Michat
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic beetle
larva
morphology
morphometry
phylogeny
Celina
Celina imitatrix
Coleoptera
Dytiscidae
Hydroporinae
Hydroporini
Hydrovatini
Hygrobiidae
Laccornini
Methlini
spellingShingle beetle
larva
morphology
morphometry
phylogeny
Celina
Celina imitatrix
Coleoptera
Dytiscidae
Hydroporinae
Hydroporini
Hydrovatini
Hygrobiidae
Laccornini
Methlini
Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae)
topic_facet beetle
larva
morphology
morphometry
phylogeny
Celina
Celina imitatrix
Coleoptera
Dytiscidae
Hydroporinae
Hydroporini
Hydrovatini
Hygrobiidae
Laccornini
Methlini
description Phylogenetic relationships within diving beetles (Dytiscidae) are imperfectly known. In particular, some authors have considered that the tribe Methlini is included in the subfamily Hydroporinae (a large group including about half of the dytiscid species worldwide), whereas others have argued in favour of excluding Methlini from the Hydroporinae and giving it subfamilial rank. Larval characters have been underutilised in phylogenetic studies, mainly because the larvae of many taxa within the family are still unknown. The larval morphology of the dytiscid tribe Methlini, in particular, remains poorly known. In this study, the phylogenetic relationships among ancestral lineages of the Hydroporinae are investigated based on a cladistic analysis of 34 taxa and 127 morphological larval characters. For this purpose, larvae of the Methlini (Celina parallela (Babington, 1841)) and C. imitatrix Young, 1979) are described and illustrated in detail for the first time, with particular emphasis on morphometry and chaetotaxy. The results show high support for a monophyletic origin of the Hydroporinae, including Methlini, based on eight unique character states. Giving Methlini subfamily rank would leave Hydroporinae with a single unique larval apomorphy. This supports the inclusion of Methlini as a tribe of Hydroporinae. Other interesting but less well supported results include: 1, the clade Laccornini + Hydrovatini + Canthyporus Zimmermann, 1919 (Hydroporini) resolved as the sister-group to the other Hydroporinae minus Methlini; and 2, Hydrovatini and Canthyporus resolved as sister-groups. The presence of a galea, albeit in a reduced form, in larvae of Methlini, Laccornini and Hydrovatini is of the utmost interest. The putative hypothesis of an ancestral position for these genera within Hydroporinae suggests that hydroporines lost the galea secondarily. © CSIRO 2007.
title Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae)
title_short Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae)
title_full Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae)
title_fullStr Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae)
title_full_unstemmed Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae)
title_sort larval morphology of the diving beetle celina and the phylogeny of ancestral hydroporines (coleoptera:dytiscidae:hydroporinae)
publishDate 2007
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14455226_v21_n3_p239_Michat
http://hdl.handle.net/20.500.12110/paper_14455226_v21_n3_p239_Michat
_version_ 1768546224558833664

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