Types of Insect Metamorphosis: Complete vs. Incomplete

Insect metamorphosis is the biological process by which an insect changes form through development, and it occurs in two primary patterns: complete metamorphosis (holometabolous development) and incomplete metamorphosis (hemimetabolous development). Complete metamorphosis involves four distinct life stages (egg, larva, pupa, adult), while incomplete metamorphosis involves three stages (egg, nymph, adult) with the nymph gradually resembling the adult through successive molts. This article compares these two developmental strategies, provides examples of insects that undergo each type, and explains the ecological and evolutionary advantages of each approach. The information is intended for students, researchers, life-science professionals, and informed general readers who need a practical understanding of insect development for identification, management, or research purposes.

At a Glance: Comparison of Metamorphosis Types

Understanding the Endocrine Basis of Metamorphosis

The transformation from juvenile to adult form in insects is regulated by two principal hormone types: ecdysteroids, which promote molts, and juvenile hormones, which repress the transformation into the adult stage. The interplay of these two hormones regulates the genes involved in juvenile and adult programs and the shift from one to the other, as established by modern physiology (MicroRNA-dependent metamorphosis in hemimetabolan insects). This endocrine framework applies across both complete and incomplete metamorphosis, though the details of gene expression differ between the two strategies.

In hemimetabolan insects such as the German cockroach (Blattella germanica), microRNAs play a key role in metamorphosis, perhaps regulating genes that are juvenile hormone targets. When Dicer-1 ribonuclease, the enzyme that transforms microRNA precursors into mature microRNAs, was silenced in the last instar nymph of B. germanica, metamorphosis was practically inhibited after the next molt, as the resulting specimens showed nymphoid features and were able to molt again (MicroRNA-dependent metamorphosis in hemimetabolan insects). This demonstrates that microRNAs are essential for the normal progression of incomplete metamorphosis.

In holometabolous insects, the larval, pupal, and adult stages are determined by three metamorphic genes: chinmo, broad, and E93 respectively. A temporal endocrine landscape involving ecdysteroids, juvenile hormone, and myoglianin acts on these genes to move insects through their life history (Regulation of Metamorphosis in Holometabolous Insects). Chinmo is anti-metamorphic and suppresses expression of broad and E93. The juvenile hormone target gene Krüppel-homolog 1 (Kr-h1) also suppresses metamorphosis, but the need for juvenile hormone in maintaining the larva varies among species. Early larval molts are juvenile hormone independent, but later ones use juvenile hormone via Kr-h1 to maintain larval molting and suppress E93 expression until larvae cross a size threshold for metamorphosis (Regulation of Metamorphosis in Holometabolous Insects).

The evolution of mutual inhibition between Broad and E93 was a key innovation in the transition to holometaboly. This allowed imaginal primordia to rapidly expand through self-renewing growth in the larva before transitioning to morphogenetic growth to form the pupa (Regulation of Metamorphosis in Holometabolous Insects). In hemimetabolous insects, Chinmo and juvenile hormone via Kr-h1 maintain the nymphal stage and suppress E93 and adult differentiation. Broad is co-expressed with chinmo, and they collaborate to direct nymphal growth, especially of the wing pads. Chinmo supports isomorphic growth while Broad supports positive allometric growth (Regulation of Metamorphosis in Holometabolous Insects).

Complete Metamorphosis: The Holometabolous Strategy

Complete metamorphosis, also known as holometabolous development, is the most derived form of insect development. Insects that undergo complete metamorphosis pass through four distinct life stages: egg, larva, pupa, and adult. The larval stage is specialized for feeding and growth, while the adult stage is specialized for reproduction and dispersal. The pupal stage serves as a transition during which the larval body is broken down and rebuilt into the adult form.

The Four Life Stages

The egg stage begins the life cycle. Eggs are laid by the adult female, often on or near a suitable food source for the larvae. The larva that hatches from the egg is fundamentally different in form and function from the adult. Larvae are typically worm-like or grub-like, with chewing mouthparts adapted for consuming large quantities of food. Examples include caterpillars (Lepidoptera), maggots (Diptera), and grubs (Coleoptera).

The larval stage is the primary growth phase. Larvae feed voraciously and molt several times as they grow, with each molt marking a new instar. The number of larval instars varies by species but typically ranges from four to eight. During this stage, the insect accumulates the resources needed for metamorphosis and adult life. The larval stage is particularly susceptible to density-dependent effects because the larva is the resource-acquiring stage, and these effects can modulate the expression of life-history traits in the larval and adult stages and downstream for population dynamics and evolution (Integrative developmental ecology).

The pupal stage is a non-feeding transition period. Inside the pupa, larval tissues are broken down and adult structures are formed. This process involves extensive remodeling, including the development of wings, compound eyes, and reproductive organs. In Drosophila, the nervous system undergoes massive and stereotypic remodeling during metamorphosis, including degenerative events such as neurite pruning that may be followed by regeneration to form novel connections during normal development (A fly's view of neuronal remodeling). The pupal stage may be protected by a cocoon spun by the larva, a chrysalis formed from the hardened larval skin, or a puparium formed from the last larval cuticle.

The adult stage is the reproductive and dispersal phase. Adults emerge from the pupa with fully formed wings and functional reproductive organs. In many species, adults feed on different food sources than larvae, reducing competition between life stages. For example, butterfly larvae feed on leaves while adults feed on nectar.

Molecular Regulation of Complete Metamorphosis

The transition through the four stages of complete metamorphosis is tightly regulated by hormones and transcription factors. The stage specifying transcription factors broad-complex (br) and Ecdysone inducible protein 93 (E93) determine the pupal and adult stages respectively. A probable larval determinant, chronologically inappropriate metamorphosis (chinmo), has recently been characterized. Expression of these three transcription factors in metamorphosing insects is regulated by juvenile hormone with ecdysteroid hormones, and by mutual repression between the stage-specific transcription factors (The genetic determination of alternate stages in polyphenic insects).

In holometabolous insects, the larval, pupal, and adult stages are determined by chinmo, broad, and E93 respectively. The temporal endocrine landscape involving ecdysteroids, juvenile hormone, and myoglianin acts on these genes to move insects through their life history (Regulation of Metamorphosis in Holometabolous Insects). Based on whether juvenile hormone is needed to maintain the larva, either E93 (as in Tribolium beetles) or broad (as in Drosophila) serves as the entry to metamorphosis. Inhibitory interactions between broad and E93, and a return of juvenile hormone in the prepupa, ensures that Broad and pupa formation occur before E93 and adult differentiation (Regulation of Metamorphosis in Holometabolous Insects).

Examples of Holometabolous Insects

Common examples of insects with complete metamorphosis include butterflies and moths (order Lepidoptera), beetles (order Coleoptera), flies and mosquitoes (order Diptera), and bees, wasps, and ants (order Hymenoptera). Each of these orders shows the characteristic four-stage life cycle, though the details of larval form, pupation site, and adult ecology vary widely.

The silkworm (Bombyx mori) provides a well-studied example of holometabolous development. Paired transcriptome and proteome profiling throughout the silkworm's developmental life cycle has revealed stage-specific and conserved expression dynamics across holometabolous insects. The oxidative phosphorylation pathway was enriched in genes expressed especially in adults, and the majority of genes for which transcript and protein dynamics differ are linked to translation and RNA regulation (Unraveling developmental gene regulation in holometabolous insects).

Advantages of Complete Metamorphosis

Complete metamorphosis offers several ecological and evolutionary advantages. The separation of larval and adult niches reduces intraspecific competition for food and habitat. Larvae are specialized for feeding and growth, while adults are specialized for reproduction and dispersal. This niche partitioning allows a single species to exploit two different ecological roles.

The pupal stage provides a protected period for the reorganization of the body plan. This allows for the evolution of radically different larval and adult forms, from the worm-like larva to the winged adult. The ability to undergo extensive tissue remodeling during metamorphosis also permits the development of complex adult structures such as wings, compound eyes, and specialized mouthparts.

Metamorphosis also provides an opportunity for flexibility in symbiotic associations. Some holometabolous insects maintain the same symbiont as larvae and adults but house it in different tissues. In other species, larvae and adults may harbor entirely different types or numbers of microbes, in accordance with shifts in host diet or habitat. Such flexibility may provide an advantage over hemimetabolous insects, in which selection on adult-stage microbial associations may be constrained by its negative effects on immature stages, and vice versa (Links between metamorphosis and symbiosis in holometabolous insects).

Incomplete Metamorphosis: The Hemimetabolous Strategy

Incomplete metamorphosis, also known as hemimetabolous development, is the more ancestral form of insect development. Insects that undergo incomplete metamorphosis pass through three life stages: egg, nymph, and adult. The nymph resembles a smaller version of the adult, lacking wings and functional reproductive organs, but otherwise similar in body form and ecology.

The Three Life Stages

The egg stage begins the life cycle. Eggs are laid by the adult female, often in or near the habitat where the nymphs will feed. The nymph that hatches from the egg resembles the adult in general body plan, though it lacks wings and reproductive structures.

The nymphal stage is the growth phase. Nymphs feed on the same food sources as adults and molt several times as they grow. With each molt, the nymph becomes larger and more closely resembles the adult. Wing pads, which are external structures, become increasingly prominent with each successive instar. The number of nymphal instars varies by species but typically ranges from four to eight.

The adult stage is reached after the final molt. At this point, the wings are fully developed and functional, and the reproductive organs are mature. In most hemimetabolous insects, the adult does not molt again.

Molecular Regulation of Incomplete Metamorphosis

In hemimetabolous insects, Chinmo and juvenile hormone via Kr-h1 maintain the nymphal stage and suppress E93 and adult differentiation. Broad is co-expressed with chinmo, and they collaborate to direct nymphal growth, especially of the wing pads. Chinmo supports isomorphic growth while Broad supports positive allometric growth (Regulation of Metamorphosis in Holometabolous Insects).

MicroRNAs play a key role in hemimetabolan metamorphosis. In the German cockroach (Blattella germanica), silencing Dicer-1 expression in the last instar nymph depleted microRNA contents and practically inhibited metamorphosis after the next molt. The resulting specimens showed nymphoid features and were able to molt again, demonstrating that microRNAs are essential for the normal progression of incomplete metamorphosis (MicroRNA-dependent metamorphosis in hemimetabolan insects).

Examples of Hemimetabolous Insects

Common examples of insects with incomplete metamorphosis include true bugs (order Hemiptera), grasshoppers and crickets (order Orthoptera), dragonflies and damselflies (order Odonata), cockroaches (order Blattodea), and mantises (order Mantodea). Each of these orders shows the characteristic three-stage life cycle with nymphs that gradually resemble adults.

The spittlebug Mahanarva fimbriolata (Hemiptera: Cercopidae) provides a recent example of molecular research on hemimetabolous development. Transcriptome analysis of different developmental stages (egg, nymph, and adult) revealed that the most significant differences in gene expression were between samples in the egg stage and samples in the other development stages. Enriched Gene Ontology terms related to insect growth, including cell division, metamorphosis, and flight, and corresponding pathways such as DNA replication and glycolysis/gluconeogenesis were identified (Comparative transcriptome analysis of developmental stages in the spittlebug Mahanarva fimbriolata).

Advantages of Incomplete Metamorphosis

Incomplete metamorphosis offers several advantages, particularly in terms of developmental efficiency. Because nymphs resemble adults and share similar food sources and habitats, there is no need for a prolonged non-feeding pupal stage. Nymphs can begin feeding immediately after hatching and continue to grow and develop without interruption.

The gradual development of wings as external wing pads allows nymphs to begin developing flight structures early in life. While nymphs cannot fly, the wing pads grow progressively with each molt, and the final molt produces fully functional wings.

Incomplete metamorphosis also allows for a more direct response to environmental conditions. Because nymphs are active and feeding throughout development, they can respond quickly to changes in food availability, temperature, and other environmental factors.

Atypical Metamorphosis Strategies

While complete and incomplete metamorphosis are the two dominant strategies, some insects exhibit atypical metamorphosis that deviates from these patterns. These rarer types of metamorphosis are often overlooked, yet they could provide important insights as they represent deviations in life history strategies that are associated with unique ecological traits (Atypical insects: molecular mechanisms of unusual life history strategies).

Neometaboly and paedomorphosis are two examples of atypical metamorphosis. Neometaboly involves a partial metamorphosis with some features of both complete and incomplete development. Paedomorphosis involves the retention of juvenile features in the adult stage. The molecular mechanisms of these atypical metamorphoses are still poorly understood, but advances in next-generation sequencing and genome editing are enabling researchers to explore their proximate mechanisms (Atypical insects: molecular mechanisms of unusual life history strategies).

Variations in the onset, duration, and tissue-specific expression of chinmo, br, and E93 may underlie other polyphenisms that have arisen throughout insects, including the castes of social insects, aquatic stages of mayflies, and the neoteny of endoparasites. Four types of expression changes are associated with novel insect forms: heterochronic shift in the turnover of expression, expansion or contraction of expression, tissue-specific expression, and redeployment of stage-specific expression. Insect stages are modular units in developmental time and a substrate for evolutionary forces to act upon (The genetic determination of alternate stages in polyphenic insects).

Practical Assessment: Identifying Metamorphosis Type

For students, researchers, and pest management professionals, the ability to identify whether an insect undergoes complete or incomplete metamorphosis is essential for understanding its life cycle, predicting its behavior, and developing effective management strategies. The following steps provide a practical approach to assessment.

Step 1: Observe the Immature Stages

Examine the immature stages of the insect. If the immature form is worm-like, grub-like, or maggot-like and bears little resemblance to the adult, the insect likely undergoes complete metamorphosis. If the immature form resembles a smaller version of the adult, with the same general body plan and feeding habits, the insect likely undergoes incomplete metamorphosis.

Step 2: Look for a Pupal Stage

Determine whether a pupal stage is present in the life cycle. The presence of a pupa, whether a cocoon, chrysalis, or puparium, indicates complete metamorphosis. The absence of a pupal stage indicates incomplete metamorphosis.

Step 3: Examine Wing Development

Observe how wings develop. In complete metamorphosis, wings develop internally during the pupal stage and emerge fully formed at adult eclosion. In incomplete metamorphosis, wings develop externally as wing pads that enlarge with each nymphal molt.

Step 4: Compare Feeding Habits

Compare the feeding habits of the immature and adult stages. If larvae and adults feed on different food sources, the insect likely undergoes complete metamorphosis. If nymphs and adults share similar food sources, the insect likely undergoes incomplete metamorphosis.

Step 5: Consult Taxonomic References

Use taxonomic keys and field guides to confirm the identification. The order to which an insect belongs is a reliable indicator of its metamorphosis type. Lepidoptera, Coleoptera, Diptera, and Hymenoptera are predominantly holometabolous. Hemiptera, Orthoptera, Odonata, and Blattodea are predominantly hemimetabolous.

Records and Measurements for Metamorphosis Studies

For researchers and students conducting studies on insect metamorphosis, maintaining accurate records is essential. The following measurements and observations are commonly recorded.

Developmental Timing

Record the duration of each life stage under controlled conditions. This includes the time from egg laying to hatching, the duration of each larval or nymphal instar, the duration of the pupal stage (if present), and the time from adult emergence to first reproduction. Temperature, photoperiod, and nutrition can all affect developmental timing.

Morphological Measurements

Measure body length, head capsule width, and other morphological features at each instar. Head capsule width is particularly useful for determining instar number in both holometabolous and hemimetabolous insects, as it increases in a predictable pattern with each molt.

Gene Expression Analysis

For molecular studies, collect samples at each developmental stage for transcriptome or proteome analysis. The silkworm Bombyx mori provides a model system with a comprehensive paired transcriptome and proteome dataset of 17 timepoints across the developmental life cycle. Such datasets enable the identification of stage-specific characteristics and the comparison of transcriptional and post-transcriptional gene expression (Unraveling developmental gene regulation in holometabolous insects).

Hormone Measurements

Measure ecdysteroid and juvenile hormone titers at key developmental transitions. These measurements can help correlate hormonal changes with morphological changes and identify the timing of critical developmental decisions.

Common Failure Patterns in Metamorphosis Studies

Several common problems can arise when studying or observing insect metamorphosis. Recognizing these patterns can help researchers and students avoid errors in interpretation.

Confusing Nymphs with Larvae

A common error is referring to the immature stages of hemimetabolous insects as larvae. Nymphs resemble adults and develop gradually, while larvae are fundamentally different in form from adults. Using the correct terminology is important for accurate communication.

Overlooking the Pupal Stage

In some species, the pupal stage may be hidden or brief. For example, some flies pupate inside the last larval skin, forming a puparium that may be mistaken for a resting larva. Careful observation is needed to confirm the presence of a pupal stage.

Misinterpreting Wing Pad Development

In hemimetabolous insects, wing pads may be mistaken for wings or for evidence of complete metamorphosis. Wing pads are non-functional external structures that enlarge with each molt, while wings are fully formed and functional only in the adult stage.

Assuming Uniform Developmental Timing

Developmental timing can vary significantly within a species due to environmental conditions. Temperature, nutrition, and population density can all affect the duration of developmental stages. In holometabolous insects, the larval stage is particularly susceptible to density-dependent effects because the larva is the resource-acquiring stage (Integrative developmental ecology).

Welfare and Safety Context

Insect metamorphosis research and observation raise several welfare and safety considerations that researchers, students, and pest management professionals should understand.

Ethical Considerations for Insect Research

Insects are living organisms, and research involving them should follow ethical guidelines for humane treatment. This includes minimizing pain and distress, providing appropriate housing and nutrition, and using the minimum number of individuals necessary to achieve research objectives. Institutional animal care and use committees may have specific requirements for invertebrate research.

Safety Considerations for Pest Management

Understanding metamorphosis type is important for pest management decisions. For holometabolous pests, the larval stage is often the most damaging and the most susceptible to control measures. For hemimetabolous pests, nymphs and adults may both cause damage and may require different management approaches. The pupal stage of holometabolous insects may be resistant to many control measures, requiring timing of applications to target susceptible stages.

Environmental Considerations

Some research on insect metamorphosis involves the use of RNA interference or other genetic manipulation techniques. These approaches may have environmental implications if used for pest control. For example, RNAi-based biopesticides targeting genes essential for metamorphosis are being explored as a sustainable management strategy for pest species. The spittlebug Mahanarva fimbriolata, a major pest that reduces forage production in Brazil, has been studied for potential RNAi targets, with hub genes such as RPB7 and Talin-2 identified as potential silencing targets (Comparative transcriptome analysis of developmental stages in the spittlebug Mahanarva fimbriolata).

Limitations of Current Knowledge

While the endocrine and genetic regulation of complete and incomplete metamorphosis is increasingly well understood, significant gaps remain in our knowledge.

Molecular Mechanisms of Atypical Metamorphosis

The molecular mechanisms of atypical metamorphoses, including neometaboly and paedomorphosis, are still poorly understood. These rarer types of metamorphosis could provide important insights into the evolution of insect life history strategies, but they remain understudied (Atypical insects: molecular mechanisms of unusual life history strategies).

Symbiont Interactions

Microbial associations remain completely unstudied for many families and even orders of Holometabola. Future research will undoubtedly reveal more links between metamorphosis and microbiota, two widespread features of animal life. Metamorphosis itself can be directly influenced by symbionts, with microbes protecting hosts from pathogen infection, supplying nutrients essential for rebuilding the adult body, and providing cues regulating pupation (Links between metamorphosis and symbiosis in holometabolous insects).

Neuronal Remodeling

Although pruning has been widely studied in the context of metamorphosis, knowledge of the molecular and cellular mechanisms is far from complete. Understanding of the processes underlying regrowth is even more fragmentary. The Drosophila nervous system undergoes massive and stereotypic remodeling during metamorphosis, providing an excellent model for studying both degenerative and regenerative events (A fly's view of neuronal remodeling).

Diapause Regulation

Environmental and hormonal regulators of diapause have been reasonably well defined, but our understanding of the molecular regulation of diapause remains in its infancy. Though many genes are shut down during diapause, others are specifically expressed at this time. Classes of diapause-upregulated genes can be distinguished based on their expression patterns, and the termination of diapause is accompanied by a rapid decline in expression of the diapause-upregulated genes and an elevation in expression of many genes that were downregulated during diapause (Regulation of diapause).

Professional Escalation Criteria

When working with insect metamorphosis in research, education, or pest management contexts, certain situations warrant consultation with a specialist or escalation to a higher level of expertise.

Taxonomic Uncertainty

If you cannot confidently identify the order or family of an insect, consult a taxonomic specialist or use a reputable identification service. Misidentification can lead to incorrect assumptions about metamorphosis type and life cycle.

Unexpected Developmental Patterns

If you observe developmental patterns that do not match the expected metamorphosis type for a known species, consult a specialist. This could indicate environmental stress, genetic abnormality, or the presence of a cryptic species.

Pest Management Failures

If pest management interventions fail despite correct identification of metamorphosis type and life stage, consult an entomologist or extension specialist. Resistance to control measures, misidentification of the target species, or environmental factors may be involved.

Research Protocol Concerns

If you are conducting research on insect metamorphosis and encounter unexpected results or technical difficulties, consult with experienced colleagues or the institutional research support office. Molecular techniques such as RNA interference can be technically challenging, and troubleshooting may require specialized expertise.

Frequently Asked Questions

What is the main difference between complete and incomplete metamorphosis?

The main difference is the number of life stages and the presence of a pupal stage. Complete metamorphosis has four stages (egg, larva, pupa, adult) with a distinct pupal stage during which the body is remodeled. Incomplete metamorphosis has three stages (egg, nymph, adult) with no pupal stage, and the nymph gradually resembles the adult through successive molts.

Which insects undergo complete metamorphosis?

Insects in the orders Lepidoptera (butterflies and moths), Coleoptera (beetles), Diptera (flies and mosquitoes), and Hymenoptera (bees, wasps, and ants) undergo complete metamorphosis. These insects have a larval stage that differs radically from the adult and a pupal stage during which transformation occurs.

Which insects undergo incomplete metamorphosis?

Insects in the orders Hemiptera (true bugs), Orthoptera (grasshoppers and crickets), Odonata (dragonflies and damselflies), and Blattodea (cockroaches) undergo incomplete metamorphosis. These insects have nymphs that resemble smaller versions of the adult and develop wings externally as wing pads.

Why do some insects have a pupal stage and others do not?

The pupal stage allows for extensive reorganization of the body plan, enabling the evolution of radically different larval and adult forms. Insects with complete metamorphosis use the pupal stage to break down larval tissues and build adult structures. Insects with incomplete metamorphosis do not need a pupal stage because their nymphs already resemble adults and develop gradually.

What hormones regulate insect metamorphosis?

Ecdysteroids promote molts, and juvenile hormones repress the transformation into the adult stage. The interplay of these two hormones regulates the genes involved in juvenile and adult programs and the shift from one to the other (MicroRNA-dependent metamorphosis in hemimetabolan insects). In holometabolous insects, the genes chinmo, broad, and E93 determine the larval, pupal, and adult stages respectively.

Can environmental factors affect metamorphosis?

Yes, environmental factors such as temperature, nutrition, and population density can affect developmental timing and outcomes. In holometabolous insects, the larval stage is particularly susceptible to density-dependent effects because the larva is the resource-acquiring stage (Integrative developmental ecology).

What is the advantage of complete metamorphosis?

Complete metamorphosis allows larvae and adults to occupy different ecological niches, reducing competition for food and habitat. The pupal stage provides a protected period for reorganization of the body plan, enabling the development of complex adult structures. Metamorphosis also provides flexibility in symbiotic associations, allowing larvae and adults to harbor different types or numbers of microbes (Links between metamorphosis and symbiosis in holometabolous insects).

What is the advantage of incomplete metamorphosis?

Incomplete metamorphosis allows nymphs to begin feeding immediately after hatching and continue growing without interruption. Because nymphs resemble adults and share similar food sources, there is no need for a prolonged non-feeding pupal stage. The gradual development of wings as external wing pads allows nymphs to begin developing flight structures early in life.

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References and Further Reading

• NCBI Literature Resources. National Center for Biotechnology Information.
• PubMed. National Library of Medicine.
• Regulation of diapause.. Annual review of entomology, 2002.
• Photorhabdus: a tale of contrasting interactions.. Microbiology (Reading, England), 2020.
• Learning from connectomics on the fly.. Current opinion in insect science, 2017.
• MicroRNA-dependent metamorphosis in hemimetabolan insects.. Proceedings of the National Academy of Sciences of the United States of America, 2009.
• Links between metamorphosis and symbiosis in holometabolous insects.. Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 2019.
• A fly's view of neuronal remodeling.. Wiley interdisciplinary reviews. Developmental biology, 2016.
• Atypical insects: molecular mechanisms of unusual life history strategies.. Current opinion in insect science, 2021.
• The genetic determination of alternate stages in polyphenic insects.. Evolution & development, 2024.
• 20-Hydroxyecdysone-Responsive &lt,i&gt,miR&lt,/i&gt,-&lt,i&gt,2788&lt,/i&gt, Regulates the Larval-Pupal Transition by Targeting Trehalase in &lt,i&gt,Galeruca daurica&lt,/i&gt,.. 2026.
• RNAi of &lt,i&gt,HvMMP2&lt,/i&gt, Affects Larval-Pupal Transition and Adult Eclosion in the &lt,i&gt,Henosepilachna vigintioctopunctata&lt,/i&gt,.. 2026.
• Integrated Morphological and Transcriptomic Analyses of Gene Regulatory Mechanisms in Different Intra-Puparial Developmental Stages of Phormia regina. 2026.
• Transcriptomic Analysis of the Diamondback Moth Under Exposure to the Juvenile Hormone Esterase (JHE) Inhibitor 3-Octylthio-1,1,1-trifluoro-2-propanone (OTFP).. 2025.
• Comparative transcriptome analysis of developmental stages and characterization of core RNAi-related genes in the spittlebug Mahanarva fimbriolata.. 2026.
• Glial cell states bias the regeneration of neuron types across the newt life cycle. 2026.
• Unraveling developmental gene regulation in holometabolous insects through comparative transcriptomics and proteomics. Communications Biology, 2025.
• Regulation of Metamorphosis in Holometabolous Insects.. Current Opinion in Insect Science, 2026.
• Integrative developmental ecology: a review of density-dependent effects on life-history traits and host-microbe interactions in non-social holometabolous insects. Evolutionary Ecology, 2020.
• Effects of chronic metal exposure and metamorphosis on the microbiomes of larval and adult insects and riparian spiders through the aquatic-riparian food web. Environmental Pollution, 2025.

This article is educational and does not replace institutional policy, professional advice, or applicable safety and regulatory requirements.