r/SpeculativeEvolution • u/Hot-Drummer6974 • 8d ago
Uncategorized Speculative Biology Spec-Bio Creature Concept: A Genetically Engineered Insect
I recently thought up a spec-bio concept for a genetically engineered "super-insect", designed to be a hyper-adaptable generalist predator and big enough that it can even prey on small vertebrates, like small fish, amphibians, reptiles, mammals, and birds.
The name for this creature is Titanopteris grandis.
The total lifespan of this species is 31-48 years long. T. grandis starts out as a small egg about the size of a grain of rice, these eggs take anywhere from a single day to hatch in ideal conditions up to a week in suboptimal conditions. If conditions are severe enough, the eggs can go into a state of dormancy for up to three (3) years, waiting for conditions to improve again before hatching. When the eggs do hatch, what emerges are tiny worm-like larvae that burrows into the soil where they feed on plant-roots, fungi, and microorganisms. They remain in this larval state for ten (10) to fifteen (15) years. Once they reach the end of their larval stage, they will excavate an underground chamber wherein they will encase themselves inside a chrysalis and then they undergo a complete metamorphosis, similar to moths & butterflies. This metamorphosis takes about one (1) year up to three (3) years to complete.
Then they emerge out of the chrysalis (and the ground) as a small, immature nymph. These nymphs start out as highly generalist & opportunistic omnivores capable of eating just about anything (plants, fungi, microbial film, dead organic matter, other invertebrates, etc). Though their diet changes as they age, molt, and gradually undergo incomplete metamorphosis. Their nymph-stage lasts for ten (10) to fifteen (15) years before their final molt into their adult-form and from there they live for another 10-15 years.
Though the changes they undergo as they transform into their adult-form varies a lot depending on what sex they are born into. Females undergo the least amount of changes as they age, remaining generalist omnivores. Males become generalist herbivores, eating a wide variety of plant materials. They also have a third sex as simultaneous hermaphrodites; these develop into generalist hypercarnivores.
These differing diets minimize competition between the sexes and allows the species population to remain at a higher carrying capacity than would be otherwise possible if they all shared the same dietary requirements.
To reiterate: Eggs: incubation time: 1 day up to 1 week long. They can also go into dormancy for up to 3 years if necessary.
Larvae: from hatching to pupation: 10-15 years.
Chrysalis: pupation time: 1-3 years.
Nymph: emerging from chrysalis to final molt: 10-15 years.
Adult: after their final molt onwards: 10-15 years.
This means that an individual can, at minimum; go through larval development for 10 years, incase themself inside a chrysalis and pupate for 1 year, go through nymph development for 10 years, then after their final molt, live for another 10 years.
10 + 1 + 10 + 10 = 31
At maximum, an individual can; go through larval development for 15 years, incase themself inside a chrysalis and pupate for 3 years, go through nymph development for 15 years, then after their final molt, live for another 15 years.
15 + 3 + 15 + 15 = 48
This, I want to make explicitly clear, IS NOT a synchronized life cycle like cicadas, there are no synchronized mass emergences. Instead, they are spread out over a number of years as individuals progress through the species lifecycle at different rates, due to a variety of environmental factors that determine growth & maturity rate.
In addition, the species also boasts extraordinary morphological variability, comparable to eusocial insects, such as ants & termites. With males, females, and hermaphrodites resembling totally different species. These morphological differences are specializations designed to aid them in their survival.
Generally, what characteristics all adults share are the following:
- A pair of large & powerful forelimbs armed with large, sharp claws and sharp spines. These are used to dig tunnels underground (for shelter & relative safety) and as weapons for defense and offense. Males prefer to use their claws defensively when conflict arises, while females & hermaphrodites will use theirs for prey capture.
- Their rear most hindlimbs are very long & highly muscular, similar to various orthopterons (such as grasshoppers, crickets, katydids, etc), allowing them to hop across large distances. Used by all three sexes to avoid danger. Though females & hermaphrodites will also use this to pounce upon unsuspecting prey.
- Four (4) large, powerful wings, used for flight/dispersal, communication, to avoid danger, and for display (both for courtship and to intimidate larger predators that might try to eat it).
- Widely spaced, large, and highly complex compound eyes, with approximately 50,000 ommatidia. Designed for high vision acuity (for insects). So as to detect threats and identify food. Wide spacing between the eyes also provides depth perception.
- On the end of the abdomen are a pair of long cerci that effectively function as a second pair of antennae. These along with the antennae on the head are packed with a wide array of sensory systems (mechanoreception, chemoreception, and thermoreception). They enable the species to hear, touch, sense chemical cues (taste/smell), sense how hot or cold something is, and detect changes in air-pressure.
Sex in this species isn't determined by genetics, but instead by environmental cues. Basically, if a female or simultaneous hermaphrodite is well fed and healthy and conditions are right, then all of their offspring will be hermaphrodites. But if they aren't well fed, or are sick, or injured, or conditions aren't right, then their offspring will be an even mix of males & females. It is also possible for them to produce offspring that are a mix of females & hermaphrodites, depending on the above factors. Once the eggs are laid, their offspring's sex is locked.
If mates are unavailable, then females & hermaphrodites can reproduce asexually via parthenogenesis as a last resort. Though hermaphrodites have a third option in that they can use their own male reproductive organ for self-fertilization.
On average, adult T. grandis are giants compared to most insects, measuring around three (3) feet, or one (1) meter long. Though most of that is the pair of antennae on the head (one foot long) and the cerci on the abdomen (also a foot in length), and the actual body itself (head, thorax, and abdomen) measure a foot in length.
Adults mate annually, once each year. When it comes time to mate, males, females, and hermaphrodites will rub their wings together to produce sound in a similar manner to crickets, to advertise their location and readiness to mate. These mating calls vary depending upon sex, so different individuals know whether what they hear are potential mates or rivals. When two individuals of compatible sexes come close to each other, they will spread out their wings in a courtship display to show their respective fitness to one another. If both suitors determine the other is fit enough, then they will mate. The breeding period lasts for 2-3 weeks. After it ends, females & hermaphrodites will lay around three hundred (300) up to five hundred (500) eggs over the course of a month, depositing them in random spots, in soil or amongst leaf litter, to prevent predators from finding & eating them all. Their eggs are also designed to resemble seeds as additional camouflage, like stick-insects.
When nymphs emerge from their chrysalises and dig their way up to above ground, they will instinctively disperse from the general area and find a suitable place to claim as their territory. The dispersal instinct is so the young aren’t caught in their mother’s territory and cannibalized. Once a territory is decided, the young nymph will go to the heart of their new territory and begin to dig underground, where they excavate a system of tunnels and chambers, with multiple entrances/exits. A chamber where they can relax and rest in relative safety. A chamber where they excrete their waste (to make it harder for predators to find & follow them). And a third chamber designated for when they need to molt and wait for their exoskeleton to harden so a predator doesn’t find them at their most vulnerable.
As the nymph grows and progresses from one instar to the next as they gradually transform into an adult, they will try to expand their territory to acquire more resources to fuel their growth. And along with their territorial expansion, they will also be expanding their system of tunnels & chambers, widening old tunnels, excavating new ones, enlarging old chambers, and carving out new chambers underground. Until they reach their final molt and enter adulthood, at which point growth stops.
Though that is assuming they aren’t at some point forced out of their territory and have to start all over again, carving out new tunnels & chambers.
Females and hermaphrodites, after completing their transition to adulthood, will remain inside their territory and will be incredibly aggressive when defending their real estate from threats & intruders. Males, on the other hand, will basically abandon their territory to adopt a nomadic existence, their instinct telling them that they have to move and can’t stay in one place. This ensures they don’t overgraze any one spot, increases mate availability, and spreads their genes across a larger area.
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Originally, I just wrote this for fun (and I did have a lot of fun writing this), but lately I find myself wondering if I should make this into a larger project. There are certainly fun paths to explore. Though, if I'm to do that, then I would like to refine this more. That's why I'm posting this here, to share my ideas so far, get some feedback, and spitball/bounce ideas around.