Larval morphology of Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae)

The three larval instars of Macrovatellus haagi (Wehncke) are described and figured for the first time. Detailed morphometric, chaetotaxic and porotaxic analyses are provided. They are compared with the immatures of other species of the genus and the tribe Vatellini. Tribal- and generic-level larval...

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Autores principales: Michat, M.C., Torres, P.L.M.
Formato: JOUR
Materias:
Bidessini
Coleoptera
Derovatellus
Dytiscidae
Hydroporinae
Hyphydrini
Macrovatellus
Macrovatellus mexicanus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_1399560X_v36_n2_p199_Michat
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_1399560X_v36_n2_p199_Michat2023-10-03T16:12:50Z Larval morphology of Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae) Michat, M.C. Torres, P.L.M. Bidessini Coleoptera Derovatellus Dytiscidae Hydroporinae Hyphydrini Macrovatellus Macrovatellus mexicanus The three larval instars of Macrovatellus haagi (Wehncke) are described and figured for the first time. Detailed morphometric, chaetotaxic and porotaxic analyses are provided. They are compared with the immatures of other species of the genus and the tribe Vatellini. Tribal- and generic-level larval characters are identified based on the descriptions herein provided and those found in the literature. A Vatellini larva is distinguished by its very characteristic nasale, antennomere 1 and maxillary stipes elongate, prementum as long as broad, and very long siphon and urogomphi. Macrovatellus Sharp differs from Derovatellus Sharp by the presence of lateral spinulae on prementum, and secondary setation on antennomeres 1 and 2 and maxillary palpomere 1. Third instar of M. haagi differs from M. mexicanus Sharp by its one-segmented labial palpi and siphon shorter than cerci. A phylogenetic analysis based on 57 larval characters and including members of six tribes of the Hydroporinae was conducted. It supports the hypothesis of a derived condition of the tribe Vatellini within this subfamily. The clade Bidessini + Vatellini + Hyphydrini and the clade Vatellini + Hyphydrini are well supported. Several characters suggest a monophyletic origin of the tribe Vatellini, and two synapomorphies support monophyly of the genus Macrovatellus. © Insect Systematics & Evolution (Group 2). JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1399560X_v36_n2_p199_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 Bidessini
Coleoptera
Derovatellus
Dytiscidae
Hydroporinae
Hyphydrini
Macrovatellus
Macrovatellus mexicanus
spellingShingle Bidessini
Coleoptera
Derovatellus
Dytiscidae
Hydroporinae
Hyphydrini
Macrovatellus
Macrovatellus mexicanus
Michat, M.C.
Torres, P.L.M.
Larval morphology of Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae)
topic_facet Bidessini
Coleoptera
Derovatellus
Dytiscidae
Hydroporinae
Hyphydrini
Macrovatellus
Macrovatellus mexicanus
description The three larval instars of Macrovatellus haagi (Wehncke) are described and figured for the first time. Detailed morphometric, chaetotaxic and porotaxic analyses are provided. They are compared with the immatures of other species of the genus and the tribe Vatellini. Tribal- and generic-level larval characters are identified based on the descriptions herein provided and those found in the literature. A Vatellini larva is distinguished by its very characteristic nasale, antennomere 1 and maxillary stipes elongate, prementum as long as broad, and very long siphon and urogomphi. Macrovatellus Sharp differs from Derovatellus Sharp by the presence of lateral spinulae on prementum, and secondary setation on antennomeres 1 and 2 and maxillary palpomere 1. Third instar of M. haagi differs from M. mexicanus Sharp by its one-segmented labial palpi and siphon shorter than cerci. A phylogenetic analysis based on 57 larval characters and including members of six tribes of the Hydroporinae was conducted. It supports the hypothesis of a derived condition of the tribe Vatellini within this subfamily. The clade Bidessini + Vatellini + Hyphydrini and the clade Vatellini + Hyphydrini are well supported. Several characters suggest a monophyletic origin of the tribe Vatellini, and two synapomorphies support monophyly of the genus Macrovatellus. © Insect Systematics & Evolution (Group 2).
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 Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae)
title_short Larval morphology of Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae)
title_full Larval morphology of Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae)
title_fullStr Larval morphology of Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae)
title_full_unstemmed Larval morphology of Macrovatellus haagi (Wehncke) and phylogeny of Hydroporinae (Coleoptera: Dytiscidae)
title_sort larval morphology of macrovatellus haagi (wehncke) and phylogeny of hydroporinae (coleoptera: dytiscidae)
url http://hdl.handle.net/20.500.12110/paper_1399560X_v36_n2_p199_Michat
work_keys_str_mv AT michatmc larvalmorphologyofmacrovatellushaagiwehnckeandphylogenyofhydroporinaecoleopteradytiscidae
AT torresplm larvalmorphologyofmacrovatellushaagiwehnckeandphylogenyofhydroporinaecoleopteradytiscidae
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