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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Detalles Bibliográficos
Publicado: 2010
Materias:
Chaetotaxy
Diving beetles
Epigaeic
Hypogaeic
Larva
Morphometry
Phylogenetic relationships
Bidessini
Coleoptera
Dytiscidae
Hydroglyphus
Hydroglyphus balkei
Hygrobiidae
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11755326_v_n2658_p38_Michat
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 paper:paper_11755326_v_n2658_p38_Michat
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spelling paper:paper_11755326_v_n2658_p38_Michat2023-06-08T16:09:49Z 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 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. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11755326_v_n2658_p38_Michat 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
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.
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
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11755326_v_n2658_p38_Michat
http://hdl.handle.net/20.500.12110/paper_11755326_v_n2658_p38_Michat
_version_ 1768546266708443136

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