Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy

The phylogenetic relationships of the diving beetle (Dytiscidae) genus Leuronectes Sharp are revised based on a cladistic analysis of seven Agabinae genera and 54 morphological and chaetotaxic characters from larvae. For this purpose, larvae of L. curtulus Régimbart are described and illustrated in...

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Autores principales: Michat, M.C., Archangelsky, M.
Formato: JOUR
Materias:
Chaetotaxy
Diving beetles
Euronectes
Larvae
Morphometry
Phylogenetic relationships
Coleoptera
Dytiscidae
Hydrotrupes
Hygrobiidae
Ilybius
Platambus
Platynectes
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_1399560X_v40_n2_p209_Michat
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_1399560X_v40_n2_p209_Michat
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spelling todo:paper_1399560X_v40_n2_p209_Michat2023-10-03T16:12:50Z Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy Michat, M.C. Archangelsky, M. Chaetotaxy Diving beetles Euronectes Larvae Morphometry Phylogenetic relationships Coleoptera Dytiscidae Hydrotrupes Hygrobiidae Ilybius Platambus Platynectes The phylogenetic relationships of the diving beetle (Dytiscidae) genus Leuronectes Sharp are revised based on a cladistic analysis of seven Agabinae genera and 54 morphological and chaetotaxic characters from larvae. For this purpose, larvae of L. curtulus Régimbart are described and illustrated in detail for the first time, with particular emphasis on morphometry and chaetotaxy. The results show that Leuronectes is well placed within Agabinae based on the absence of natatory setae on tibia and tarsus in instars II and III, the urogomphus composed of two urogomphomeres, and the absence of secondary setae on urogomphus. Leuronectes is resolved as part of a basal polytomy along with Platynectes Régimbart and a clade formed by the remaining agabine genera. Leuronectes shares with Platynectes the setae UR2, UR3 and UR4 not inserted contiguously, with Platambus Thomson the anterolateral lobes of frontoclypeus not projected beyond anterior margin, with Hydrotrupes Sharp the seta AB9 inserted dorsolaterally, and with Ilybius Erichson the seta LA10 inserted submedially. Leuronectes is unique within Agabinae in having the apical lateroventral process of the third antennomere not protruding and additional ventroapical pores on third antennomere, and is unique within the dytiscid genera studied in having the seta LA12 inserted submedially and one additional spine-like seta inserted on the lateral margin of abdominal segment VIII. © Koninklijke Brill NV, Leiden, 2009. Fil:Michat, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1399560X_v40_n2_p209_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 Chaetotaxy
Diving beetles
Euronectes
Larvae
Morphometry
Phylogenetic relationships
Coleoptera
Dytiscidae
Hydrotrupes
Hygrobiidae
Ilybius
Platambus
Platynectes
spellingShingle Chaetotaxy
Diving beetles
Euronectes
Larvae
Morphometry
Phylogenetic relationships
Coleoptera
Dytiscidae
Hydrotrupes
Hygrobiidae
Ilybius
Platambus
Platynectes
Michat, M.C.
Archangelsky, M.
Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy
topic_facet Chaetotaxy
Diving beetles
Euronectes
Larvae
Morphometry
Phylogenetic relationships
Coleoptera
Dytiscidae
Hydrotrupes
Hygrobiidae
Ilybius
Platambus
Platynectes
description The phylogenetic relationships of the diving beetle (Dytiscidae) genus Leuronectes Sharp are revised based on a cladistic analysis of seven Agabinae genera and 54 morphological and chaetotaxic characters from larvae. For this purpose, larvae of L. curtulus Régimbart are described and illustrated in detail for the first time, with particular emphasis on morphometry and chaetotaxy. The results show that Leuronectes is well placed within Agabinae based on the absence of natatory setae on tibia and tarsus in instars II and III, the urogomphus composed of two urogomphomeres, and the absence of secondary setae on urogomphus. Leuronectes is resolved as part of a basal polytomy along with Platynectes Régimbart and a clade formed by the remaining agabine genera. Leuronectes shares with Platynectes the setae UR2, UR3 and UR4 not inserted contiguously, with Platambus Thomson the anterolateral lobes of frontoclypeus not projected beyond anterior margin, with Hydrotrupes Sharp the seta AB9 inserted dorsolaterally, and with Ilybius Erichson the seta LA10 inserted submedially. Leuronectes is unique within Agabinae in having the apical lateroventral process of the third antennomere not protruding and additional ventroapical pores on third antennomere, and is unique within the dytiscid genera studied in having the seta LA12 inserted submedially and one additional spine-like seta inserted on the lateral margin of abdominal segment VIII. © Koninklijke Brill NV, Leiden, 2009.
format JOUR
author Michat, M.C.
Archangelsky, M.
author_facet Michat, M.C.
Archangelsky, M.
author_sort Michat, M.C.
title Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy
title_short Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy
title_full Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy
title_fullStr Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy
title_full_unstemmed Phylogenetic relationships of Leuronectes Sharp (Coleoptera: Dytiscidae: Agabinae) based on larval morphology and chaetotaxy
title_sort phylogenetic relationships of leuronectes sharp (coleoptera: dytiscidae: agabinae) based on larval morphology and chaetotaxy
url http://hdl.handle.net/20.500.12110/paper_1399560X_v40_n2_p209_Michat
work_keys_str_mv AT michatmc phylogeneticrelationshipsofleuronectessharpcoleopteradytiscidaeagabinaebasedonlarvalmorphologyandchaetotaxy
AT archangelskym phylogeneticrelationshipsofleuronectessharpcoleopteradytiscidaeagabinaebasedonlarvalmorphologyandchaetotaxy
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