Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis

The three larval instars of Thermonectus succinctus (Aubé 1838) are described and illustrated for the first time, emphasizing the morphometry and chaetotaxy. Biological notes are included. Thermonectus Dejean is distinguished from other Aciliini genera by its slightly bifid median process of the pre...

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Autores principales: Michat, M.C., Torres, P.L.M.
Formato: JOUR
Materias:
Aciliini
Biology
Chaetotaxy
Larval morphology
Thermonectus succinctus
Acilius
Coleoptera
Dytiscidae
Dytiscinae
Graphoderus
Thermonectus
Thermonectus basillaris
Thermonectus nigrofasciatus ornaticollis
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01650424_v27_n4_p281_Michat
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01650424_v27_n4_p281_Michat2023-10-03T15:02:43Z Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis Michat, M.C. Torres, P.L.M. Aciliini Biology Chaetotaxy Larval morphology Thermonectus succinctus Aciliini Acilius Coleoptera Dytiscidae Dytiscinae Graphoderus Thermonectus Thermonectus basillaris Thermonectus nigrofasciatus ornaticollis The three larval instars of Thermonectus succinctus (Aubé 1838) are described and illustrated for the first time, emphasizing the morphometry and chaetotaxy. Biological notes are included. Thermonectus Dejean is distinguished from other Aciliini genera by its slightly bifid median process of the prementum, which bears two spine-like setae (LA8). First instars of T. succinctus differ from those of Acilius Leach and Graphoderus Dejean in the lower number of additional anterodistal setae on the femur. The shape of seta TA1 and the presence of an additional posterior pore on the tibia separate first instars of Graphoderus from those of Acilius and T. succinctus. Regarding the mature larva, T. succinctus differs from T. alfredi Griffini 1898 in its smaller size, from T. basillaris (Harris 1829) in the lack of a row of minute hairs along the internal margin of the galea, and from T. nigrofasciatus ornaticollis (Aubé 1838) in the shorter length of seta LA8. © 2005 Taylor & Francis. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01650424_v27_n4_p281_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 Aciliini
Biology
Chaetotaxy
Larval morphology
Thermonectus succinctus
Aciliini
Acilius
Coleoptera
Dytiscidae
Dytiscinae
Graphoderus
Thermonectus
Thermonectus basillaris
Thermonectus nigrofasciatus ornaticollis
spellingShingle Aciliini
Biology
Chaetotaxy
Larval morphology
Thermonectus succinctus
Aciliini
Acilius
Coleoptera
Dytiscidae
Dytiscinae
Graphoderus
Thermonectus
Thermonectus basillaris
Thermonectus nigrofasciatus ornaticollis
Michat, M.C.
Torres, P.L.M.
Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis
topic_facet Aciliini
Biology
Chaetotaxy
Larval morphology
Thermonectus succinctus
Aciliini
Acilius
Coleoptera
Dytiscidae
Dytiscinae
Graphoderus
Thermonectus
Thermonectus basillaris
Thermonectus nigrofasciatus ornaticollis
description The three larval instars of Thermonectus succinctus (Aubé 1838) are described and illustrated for the first time, emphasizing the morphometry and chaetotaxy. Biological notes are included. Thermonectus Dejean is distinguished from other Aciliini genera by its slightly bifid median process of the prementum, which bears two spine-like setae (LA8). First instars of T. succinctus differ from those of Acilius Leach and Graphoderus Dejean in the lower number of additional anterodistal setae on the femur. The shape of seta TA1 and the presence of an additional posterior pore on the tibia separate first instars of Graphoderus from those of Acilius and T. succinctus. Regarding the mature larva, T. succinctus differs from T. alfredi Griffini 1898 in its smaller size, from T. basillaris (Harris 1829) in the lack of a row of minute hairs along the internal margin of the galea, and from T. nigrofasciatus ornaticollis (Aubé 1838) in the shorter length of seta LA8. © 2005 Taylor & Francis.
format JOUR
author Michat, M.C.
Torres, P.L.M.
author_facet Michat, M.C.
Torres, P.L.M.
author_sort Michat, M.C.
title Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis
title_short Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis
title_full Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis
title_fullStr Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis
title_full_unstemmed Larval morphology of Thermonectus succinctus (Aubé 1838) (Coleoptera: Dytiscidae: Dytiscinae), with biological notes and chaetotaxic analysis
title_sort larval morphology of thermonectus succinctus (aubé 1838) (coleoptera: dytiscidae: dytiscinae), with biological notes and chaetotaxic analysis
url http://hdl.handle.net/20.500.12110/paper_01650424_v27_n4_p281_Michat
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AT torresplm larvalmorphologyofthermonectussuccinctusaube1838coleopteradytiscidaedytiscinaewithbiologicalnotesandchaetotaxicanalysis
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