Phylogenetic placement of the genus sternhydrus (Coleoptera: Dytiscidae: Cybistrini) based on larval morphology, with description of S. atratus

The phylogenetic relationships of the Australasian diving beetle genus Sternhydrus Brinck, 1945 were studied based on a cladistic analysis of 16 taxa and 112 morphological larval characters. Larvae of S. atratus (F., 1801) were described and illustrated in detail with particular emphasis on morphome...

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Autores principales: Michat, M.C., Alarie, Y., Watts, C.H.S.
Formato: JOUR
Materias:
chaetotaxy
diving beetle
larva
phylogeny
Sternhydrus
beetle
cladistics
diving behavior
morphology
morphometry
taxonomy
Coleoptera
Cybistrini
Dytiscidae
Hygrobiidae
Onychohydrus
Spencerhydrus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00138746_v108_n5_p881_Michat
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00138746_v108_n5_p881_Michat
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spelling todo:paper_00138746_v108_n5_p881_Michat2023-10-03T14:11:33Z Phylogenetic placement of the genus sternhydrus (Coleoptera: Dytiscidae: Cybistrini) based on larval morphology, with description of S. atratus Michat, M.C. Alarie, Y. Watts, C.H.S. chaetotaxy diving beetle larva phylogeny Sternhydrus beetle cladistics diving behavior larva morphology morphometry phylogeny taxonomy Coleoptera Cybistrini Dytiscidae Hygrobiidae Onychohydrus Spencerhydrus The phylogenetic relationships of the Australasian diving beetle genus Sternhydrus Brinck, 1945 were studied based on a cladistic analysis of 16 taxa and 112 morphological larval characters. Larvae of S. atratus (F., 1801) were described and illustrated in detail with particular emphasis on morphometry and chaetotaxy. Primary chaetotaxy were unknown for the genus. The results supported the inclusion of Sternhydrus in a clade of Australian Cybistrini genera along with Onychohydrus Schaum and White, 1847 and Spencerhydrus Sharp, 1882 based on four synapomorphies: presence of additional pores on antennomere 1, tibial seta TI7 short and spine-like, and urogomphi longer than broad, included in the nonsclerotized ventrodistal area surrounding the anus. A sister group relationship of Sternhydrus and Onychohydrus is suggested by two synapomorphies: lateral projections of frontoclypeus serrate, and row of additional anteroventral setae on meso- and metatarsus composed of several thin setae of variable length. The genus Sternhydrus is characterized by two autapomorphies: presence of both spine-like and hair-like additional setae on the ventral surface of the femur, and absence of primary pores on the urogomphus. © The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00138746_v108_n5_p881_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 beetle
larva
phylogeny
Sternhydrus
beetle
cladistics
diving behavior
larva
morphology
morphometry
phylogeny
taxonomy
Coleoptera
Cybistrini
Dytiscidae
Hygrobiidae
Onychohydrus
Spencerhydrus
spellingShingle chaetotaxy
diving beetle
larva
phylogeny
Sternhydrus
beetle
cladistics
diving behavior
larva
morphology
morphometry
phylogeny
taxonomy
Coleoptera
Cybistrini
Dytiscidae
Hygrobiidae
Onychohydrus
Spencerhydrus
Michat, M.C.
Alarie, Y.
Watts, C.H.S.
Phylogenetic placement of the genus sternhydrus (Coleoptera: Dytiscidae: Cybistrini) based on larval morphology, with description of S. atratus
topic_facet chaetotaxy
diving beetle
larva
phylogeny
Sternhydrus
beetle
cladistics
diving behavior
larva
morphology
morphometry
phylogeny
taxonomy
Coleoptera
Cybistrini
Dytiscidae
Hygrobiidae
Onychohydrus
Spencerhydrus
description The phylogenetic relationships of the Australasian diving beetle genus Sternhydrus Brinck, 1945 were studied based on a cladistic analysis of 16 taxa and 112 morphological larval characters. Larvae of S. atratus (F., 1801) were described and illustrated in detail with particular emphasis on morphometry and chaetotaxy. Primary chaetotaxy were unknown for the genus. The results supported the inclusion of Sternhydrus in a clade of Australian Cybistrini genera along with Onychohydrus Schaum and White, 1847 and Spencerhydrus Sharp, 1882 based on four synapomorphies: presence of additional pores on antennomere 1, tibial seta TI7 short and spine-like, and urogomphi longer than broad, included in the nonsclerotized ventrodistal area surrounding the anus. A sister group relationship of Sternhydrus and Onychohydrus is suggested by two synapomorphies: lateral projections of frontoclypeus serrate, and row of additional anteroventral setae on meso- and metatarsus composed of several thin setae of variable length. The genus Sternhydrus is characterized by two autapomorphies: presence of both spine-like and hair-like additional setae on the ventral surface of the femur, and absence of primary pores on the urogomphus. © The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America.
format JOUR
author Michat, M.C.
Alarie, Y.
Watts, C.H.S.
author_facet Michat, M.C.
Alarie, Y.
Watts, C.H.S.
author_sort Michat, M.C.
title Phylogenetic placement of the genus sternhydrus (Coleoptera: Dytiscidae: Cybistrini) based on larval morphology, with description of S. atratus
title_short Phylogenetic placement of the genus sternhydrus (Coleoptera: Dytiscidae: Cybistrini) based on larval morphology, with description of S. atratus
title_full Phylogenetic placement of the genus sternhydrus (Coleoptera: Dytiscidae: Cybistrini) based on larval morphology, with description of S. atratus
title_fullStr Phylogenetic placement of the genus sternhydrus (Coleoptera: Dytiscidae: Cybistrini) based on larval morphology, with description of S. atratus
title_full_unstemmed Phylogenetic placement of the genus sternhydrus (Coleoptera: Dytiscidae: Cybistrini) based on larval morphology, with description of S. atratus
title_sort phylogenetic placement of the genus sternhydrus (coleoptera: dytiscidae: cybistrini) based on larval morphology, with description of s. atratus
url http://hdl.handle.net/20.500.12110/paper_00138746_v108_n5_p881_Michat
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AT alariey phylogeneticplacementofthegenussternhydruscoleopteradytiscidaecybistrinibasedonlarvalmorphologywithdescriptionofsatratus
AT wattschs phylogeneticplacementofthegenussternhydruscoleopteradytiscidaecybistrinibasedonlarvalmorphologywithdescriptionofsatratus
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