Descriptions of the first-instar larva of the hypogaeic species Neobidessodes limestoneensis (Watts & Humphreys) and of the third-instar larva of Hydroglyphus balkei Hendrich (Coleoptera: Dytiscidae: Bidessini) with phylogenetic considerations

The first-instar larva of Neobidessodes Hendrich & Balke (through the hypogaeic species N. limestoneensis (Watts & Humphreys)) and the third-instar larva of Hydroglyphus Motschulsky (through H. balkei Hendrich) (Dytiscidae: Bidessini) are described and illustrated in detail for the first tim...

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Autores principales: Michat, M.C., Alarie, Y., Watts, C.H.S.
Formato: JOUR
Materias:
Chaetotaxy
Diving beetles
Epigaeic
Hypogaeic
Larva
Morphometry
Phylogenetic relationships
Bidessini
Coleoptera
Dytiscidae
Hydroglyphus
Hydroglyphus balkei
Hygrobiidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_11755326_v_n2658_p38_Michat
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_11755326_v_n2658_p38_Michat
record_format dspace
spelling todo:paper_11755326_v_n2658_p38_Michat2023-10-03T16:08:44Z Descriptions of the first-instar larva of the hypogaeic species Neobidessodes limestoneensis (Watts & Humphreys) and of the third-instar larva of Hydroglyphus balkei Hendrich (Coleoptera: Dytiscidae: Bidessini) with phylogenetic considerations Michat, M.C. Alarie, Y. Watts, C.H.S. Chaetotaxy Diving beetles Epigaeic Hypogaeic Larva Morphometry Phylogenetic relationships Bidessini Coleoptera Dytiscidae Hydroglyphus Hydroglyphus balkei Hygrobiidae The first-instar larva of Neobidessodes Hendrich & Balke (through the hypogaeic species N. limestoneensis (Watts & Humphreys)) and the third-instar larva of Hydroglyphus Motschulsky (through H. balkei Hendrich) (Dytiscidae: Bidessini) are described and illustrated in detail for the first time, including detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi. A cladistic analysis including 51 characters and 32 hydroporine taxa is performed, which supports the inclusion of both genera in the tribe Bidessini based on the absence of the primary pore ABc on the last abdominal segment. The third instar of H. balkei is characterized by the absence of secondary setae on the urogomphi and anterior secondary setae on the coxa, and the presence of 8-9 secondary setae on the mesofemur. On the other hand, the first instar of N. limestoneensis bears 14 lamellae clypeales on the anteroventral margin of the nasale. This species has evolved several morphological characters that are probably associated with its hypogaeic existence, including a lightly sclerotized body, relatively longer cephalic capsule and mandibles, a strongly reduced occipital foramen, absence of stemmata, and short claws. However, primary chaetotaxy apparently has remained as a very conservative expression of the phenotype. Copyright © 2010. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11755326_v_n2658_p38_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
Epigaeic
Hypogaeic
Larva
Morphometry
Phylogenetic relationships
Bidessini
Coleoptera
Dytiscidae
Hydroglyphus
Hydroglyphus balkei
Hygrobiidae
spellingShingle Chaetotaxy
Diving beetles
Epigaeic
Hypogaeic
Larva
Morphometry
Phylogenetic relationships
Bidessini
Coleoptera
Dytiscidae
Hydroglyphus
Hydroglyphus balkei
Hygrobiidae
Michat, M.C.
Alarie, Y.
Watts, C.H.S.
Descriptions of the first-instar larva of the hypogaeic species Neobidessodes limestoneensis (Watts & Humphreys) and of the third-instar larva of Hydroglyphus balkei Hendrich (Coleoptera: Dytiscidae: Bidessini) with phylogenetic considerations
topic_facet Chaetotaxy
Diving beetles
Epigaeic
Hypogaeic
Larva
Morphometry
Phylogenetic relationships
Bidessini
Coleoptera
Dytiscidae
Hydroglyphus
Hydroglyphus balkei
Hygrobiidae
description The first-instar larva of Neobidessodes Hendrich & Balke (through the hypogaeic species N. limestoneensis (Watts & Humphreys)) and the third-instar larva of Hydroglyphus Motschulsky (through H. balkei Hendrich) (Dytiscidae: Bidessini) are described and illustrated in detail for the first time, including detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi. A cladistic analysis including 51 characters and 32 hydroporine taxa is performed, which supports the inclusion of both genera in the tribe Bidessini based on the absence of the primary pore ABc on the last abdominal segment. The third instar of H. balkei is characterized by the absence of secondary setae on the urogomphi and anterior secondary setae on the coxa, and the presence of 8-9 secondary setae on the mesofemur. On the other hand, the first instar of N. limestoneensis bears 14 lamellae clypeales on the anteroventral margin of the nasale. This species has evolved several morphological characters that are probably associated with its hypogaeic existence, including a lightly sclerotized body, relatively longer cephalic capsule and mandibles, a strongly reduced occipital foramen, absence of stemmata, and short claws. However, primary chaetotaxy apparently has remained as a very conservative expression of the phenotype. Copyright © 2010.
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 Descriptions of the first-instar larva of the hypogaeic species Neobidessodes limestoneensis (Watts & Humphreys) and of the third-instar larva of Hydroglyphus balkei Hendrich (Coleoptera: Dytiscidae: Bidessini) with phylogenetic considerations
title_short Descriptions of the first-instar larva of the hypogaeic species Neobidessodes limestoneensis (Watts & Humphreys) and of the third-instar larva of Hydroglyphus balkei Hendrich (Coleoptera: Dytiscidae: Bidessini) with phylogenetic considerations
title_full Descriptions of the first-instar larva of the hypogaeic species Neobidessodes limestoneensis (Watts & Humphreys) and of the third-instar larva of Hydroglyphus balkei Hendrich (Coleoptera: Dytiscidae: Bidessini) with phylogenetic considerations
title_fullStr Descriptions of the first-instar larva of the hypogaeic species Neobidessodes limestoneensis (Watts & Humphreys) and of the third-instar larva of Hydroglyphus balkei Hendrich (Coleoptera: Dytiscidae: Bidessini) with phylogenetic considerations
title_full_unstemmed Descriptions of the first-instar larva of the hypogaeic species Neobidessodes limestoneensis (Watts & Humphreys) and of the third-instar larva of Hydroglyphus balkei Hendrich (Coleoptera: Dytiscidae: Bidessini) with phylogenetic considerations
title_sort descriptions of the first-instar larva of the hypogaeic species neobidessodes limestoneensis (watts & humphreys) and of the third-instar larva of hydroglyphus balkei hendrich (coleoptera: dytiscidae: bidessini) with phylogenetic considerations
url http://hdl.handle.net/20.500.12110/paper_11755326_v_n2658_p38_Michat
work_keys_str_mv AT michatmc descriptionsofthefirstinstarlarvaofthehypogaeicspeciesneobidessodeslimestoneensiswattshumphreysandofthethirdinstarlarvaofhydroglyphusbalkeihendrichcoleopteradytiscidaebidessiniwithphylogeneticconsiderations
AT alariey descriptionsofthefirstinstarlarvaofthehypogaeicspeciesneobidessodeslimestoneensiswattshumphreysandofthethirdinstarlarvaofhydroglyphusbalkeihendrichcoleopteradytiscidaebidessiniwithphylogeneticconsiderations
AT wattschs descriptionsofthefirstinstarlarvaofthehypogaeicspeciesneobidessodeslimestoneensiswattshumphreysandofthethirdinstarlarvaofhydroglyphusbalkeihendrichcoleopteradytiscidaebidessiniwithphylogeneticconsiderations
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