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The unity of characters: ecological and morphological specialisation in larvae of Hawaiian platynine Carabidae (Coleoptera)

The unity of characters: ecological and morphological specialisation in larvae of Hawaiian... <jats:p> Life history information and first instar egg bursters are compared for larvae of 25 species across the monophyletic radiation of Hawaiian Platynini (Coleoptera : Carabidae). The plesiotypic larval duration is approximately five weeks, with derived extension of the larval period having evolved during phylogenetic diversification of the radiation. This extension in larval duration is associated with vestigialisation of the metathoracic flight wings. Egg size is larger in those brachypterous species with slower developing larvae, reflecting pervasive ecological specialisation of these taxa in the isolated, favourable, and temporally stable habitats of Hawaiian montane forests. First instar egg bursters are also compared across these taxa, with evolution of a keel-like egg burster congruently defining a clade also characterised by longer larval duration and larger egg size. A functional linkage between egg burster configuration and egg size is rejected by lack of any association between egg size and egg burster type in the related genus Calathus. Such rejection does not reduce the value of the egg burster for phylogenetic inference. The ability to assess taxa for both life history traits and egg burster configuration argues for similar treatment of all such characters, both ecological and morphological, when estimating phylogeny.</jats:p> http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Invertebrate Systematics CrossRef

The unity of characters: ecological and morphological specialisation in larvae of Hawaiian platynine Carabidae (Coleoptera)

Invertebrate Systematics , Volume 14 (6): 931 – Jan 1, 2000

The unity of characters: ecological and morphological specialisation in larvae of Hawaiian platynine Carabidae (Coleoptera)


Abstract

<jats:p>
Life history information and first instar egg bursters are compared for larvae
of 25 species across the monophyletic radiation of Hawaiian Platynini
(Coleoptera : Carabidae). The plesiotypic larval duration is approximately
five weeks, with derived extension of the larval period having evolved during
phylogenetic diversification of the radiation. This extension in larval
duration is associated with vestigialisation of the metathoracic flight wings.
Egg size is larger in those brachypterous species with slower developing
larvae, reflecting pervasive ecological specialisation of these taxa in the
isolated, favourable, and temporally stable habitats of Hawaiian montane
forests. First instar egg bursters are also compared across these taxa, with
evolution of a keel-like egg burster congruently defining a clade also
characterised by longer larval duration and larger egg size. A functional
linkage between egg burster configuration and egg size is rejected by lack of
any association between egg size and egg burster type in the related genus
Calathus. Such rejection does not reduce the value of
the egg burster for phylogenetic inference. The ability to assess taxa for
both life history traits and egg burster configuration argues for similar
treatment of all such characters, both ecological and morphological, when
estimating phylogeny.</jats:p>

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Publisher
CrossRef
ISSN
1445-5226
DOI
10.1071/it00018
Publisher site
See Article on Publisher Site

Abstract

<jats:p> Life history information and first instar egg bursters are compared for larvae of 25 species across the monophyletic radiation of Hawaiian Platynini (Coleoptera : Carabidae). The plesiotypic larval duration is approximately five weeks, with derived extension of the larval period having evolved during phylogenetic diversification of the radiation. This extension in larval duration is associated with vestigialisation of the metathoracic flight wings. Egg size is larger in those brachypterous species with slower developing larvae, reflecting pervasive ecological specialisation of these taxa in the isolated, favourable, and temporally stable habitats of Hawaiian montane forests. First instar egg bursters are also compared across these taxa, with evolution of a keel-like egg burster congruently defining a clade also characterised by longer larval duration and larger egg size. A functional linkage between egg burster configuration and egg size is rejected by lack of any association between egg size and egg burster type in the related genus Calathus. Such rejection does not reduce the value of the egg burster for phylogenetic inference. The ability to assess taxa for both life history traits and egg burster configuration argues for similar treatment of all such characters, both ecological and morphological, when estimating phylogeny.</jats:p>

Journal

Invertebrate SystematicsCrossRef

Published: Jan 1, 2000

There are no references for this article.