Multiple ancient origins of neoteny in Lycidae (Coleoptera): consequences for ecology and macroevolution
Open accessAbstract
Neoteny, the maintenance of larval features in sexually mature adults, is a radical way of generating evolutionary novelty through shifts in relative timing of developmental programmes. While controlled by the environment in facultative neotenics, retention of larval features is obligatory in many species of Lycidae (net-winged beetles). They are studied here as an example of how developmental shifts and ecology interact to produce macroevolutionary impacts. We conducted a phylogenetic analysis of Lycidae based on DNA sequences from nuclear (18S and 28S rRNA) and mitochondrial (rrnL,cox1,cob and nad5) genes from a representative set of lineages (73 species), including 17 neotenic taxa. Major changes of basal relationships compared with those implied in the current classification generally supported three independent origins of neotenics in Lycidae. The southeast Asian Lyropaeinae and Ateliinae were in basal positions indicating evolutionary antiquity, also confirmed by molecular clock estimates, unlike the neotropical leptolycines nested within Calopterini and presumably much younger. neotenics exhibit typical K-selected traits including slow development, large body size, high investment in offspring and low dispersal. This correlated with low species richness and restricted ranges of neotenic lineages compared with their sisters. Yet, these factors did not impede the evolutionary persistence of affected lineages, even without reversals to fully metamorphosed forms, contradicting earlier suggestions of recent evolution from dispersive non-neotenics.
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In Strepsiptera and phylogenetically well-resolved elateroid beetles, the trade-off between dispersal and fecundity appears to be total, with no reversals apparent across phylogeny.
“In Strepsiptera (McMahon et al. , 2011a) and phylogenetically well-resolved elateroid beetles (e.g. Lycidae; Bocak et al. , 2008; Masek et al. , 2015), the trade-off appears to be total (no reversals are apparent across phylogeny; although see Jeng, 2008 for a wider discussion of Elateroidea).”
From Why grow up? <scp>A</scp> perspective on insect strategies to avoid metamorphosis (2016) · cites this paper as Bocak et al., 2008
The Discussion reports that wing loss reduces dispersal in neotenic Lycidae while allowing greater investment in reproduction, and says trait mapping is consistent with no reversals in neoteny. It also describes these changes as stepwise, rather than establishing a total dispersal–fecundity trade-off. This citation supports the Lycidae portion of the sentence, not the separately cited Strepsiptera portion. (LLM, conf=0.82)
Experimental — accuracy not yet measuredDefensive coloration and luminescence represent ancestral aposematic traits of other paedomorphic elateroid lineages such as Lampyridae and Phengodidae.
“Interestingly, defensive coloration (Linsley et al. , 1961) and luminescence (De Cock & Matthysen, 2001) represent ancestral aposematic traits of other paedomorphic elateroid lineages such as Lampyridae and Phengodidae (Bocak et al. , 2008).”
From Why grow up? <scp>A</scp> perspective on insect strategies to avoid metamorphosis (2016) · cites this paper as Bocak et al., 2008
The Discussion (section 4) identifies luminescence as an aposematic signal in Lampyridae and Phengodidae and says these defensive strategies preceded the shift to extreme neoteny. It assigns aposematic coloration to Cantharidae and Lycidae, however, not to Lampyridae or Phengodidae, so the claim’s grouping of both traits with the latter lineages is not fully supported. (LLM, conf=0.85)
Experimental — accuracy not yet measuredInsects that have lost complete metamorphosis via type II paedomorphosis are thought to have evolved once in derived lineages of the endoparasitic order Strepsiptera, and several times in the beetle superfamily Elateroidea.
“Insects that have lost complete metamorphosis via type II paedomorphosis are thought to have evolved once in derived lineages of the endoparasitic order Strepsiptera (Kathirithamby, 1989; Pohl & Beutel, 2008; McMahon et al. , 2011a,2011b), and several times in the beetle superfamily Elateroidea (Mjöberg, 1925; Cicero, 1988; Wong, 1996; Bocak & Matsuda, 2003; Bocak et al. , 2008; Jeng, 2008”
From Why grow up? <scp>A</scp> perspective on insect strategies to avoid metamorphosis (2016) · cites this paper as Bocak et al., 2008
In Platerodrilini (Lycidae), females are both soft-bodied and substantially larger than their male counterparts.
“In one of the more unusual examples, the so-called 'trilobite larvae' of the Platerodrilini (Lycidae), females are both soft-bodied and substantially larger than their male counterparts (Bocakova et al. , 2007; Bocak et al. , 2008) (Fig. 3).”
From Why grow up? <scp>A</scp> perspective on insect strategies to avoid metamorphosis (2016) · cites this paper as Bocak et al., 2008
Knowledge of the phylogenetic relationships among putatively independent lineages remains equivocal for many groups.
“Knowledge of the phylogenetic relationships among putatively independent lineages also remains equivocal for many groups (although see Bocak et al. , 2008; Kundrata & Bocak, 2011; McMahon et al. , 2011a; Masek et al. , 2015).”
From Why grow up? <scp>A</scp> perspective on insect strategies to avoid metamorphosis (2016) · cites this paper as Bocak et al., 2008
In platerodrilid lycid beetles, long developmental times and inactivity are characteristic of females.
“In platerodrilid lycid beetles (Elateroidea), long developmental times and inactivity are characteristic of females (Bocak et al. , 2008).”
From Why grow up? <scp>A</scp> perspective on insect strategies to avoid metamorphosis (2016) · cites this paper as Bocak et al., 2008
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- Authors
- Bocak, L., Bocakova, M., Hunt, T., & Vogler, A. P.
- Affiliations
- Department of Zoology, Faculty of Science, Palacky UniversityTřída Svobody 26, 771 46 Olomouc, Czech Republic
- Department of Biology, Pedagogical Faculty, Palacky UniversityPurkrabska 2, 771 00 Olomouc, Czech Republic
- Natural History Museum (GB)
- Venue
- Proceedings of the Royal Society B: Biological Sciences
- Publisher
- The Royal Society
- Published
- 2008-05-13
- Volume
- 275
- Issue
- 1646
- Pages
- 2015-2023
- ISSN
- 0080-4649 (ISSN-L)
- 0962-8452
- 1471-2954
- PMC
- PMC2596372
- OpenAlex
- W1969188539
- Cited by
- 103
- References
- 49
- Citations by year
- 2026: 1 · 2025: 5 · 2024: 5 · 2023: 6 · 2022: 7 · 2021: 8 · 2020: 8 · 2019: 8 · 2018: 10 · 2017: 10 · 2016: 4 · 2015: 6 · 2014: 8 · 2013: 1 · 2012: 2
- FWCI
- 5.02
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Proceedings of the Royal Society B Biological Sciences (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Coleoptera Taxonomy and Distribution
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Scarabaeidae Beetle Taxonomy and Biogeography
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Keywords
- neoteny, Lycidae, macroevolution, developmental changes, K-selected life history, phylogenetic relationships, molecular clock, species richness, dispersal, evolutionary innovation
- MeSH terms
- Animals, Coleoptera, DNA, Mitochondrial, Biological Evolution, Female, Male, Phylogeny, RNA, Ribosomal, 18S, RNA, Ribosomal, 28S, Polymerase Chain Reaction, Sequence Alignment, Sequence Analysis, DNA
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