Porcellio werneri Care Guide | Habitat, Feeding & Breeding Tips
Introduction
Porcellio werneri is a fascinating species of isopod native to Greece, prized among hobbyists for its unique shape and hardy nature. Known for its flattened body and distinctive “skirted” appearance, this species thrives in semi-dry environments and makes a great addition to any invert or isopod collection.
This guide will walk you through everything you need to know about Porcellio werneri care — from setting up the right habitat and maintaining humidity, to feeding, breeding, and troubleshooting common issues.
Isopod Species Overview
Scientific name: Porcellio werneri
Common name: Werner’s Isopod or Greek Shield Isopod
Origin: Greece and surrounding Mediterranean regions
Size: Medium
Behaviour: Prefers drier areas with access to moisture zones; moderately active but prefers to stay under cover for most of the time.
These isopods are slightly more demanding than beginner species like Porcellio Laevis, but with the right environment, they can thrive and reproduce steadily in captivity.
Ideal Habitat Setup
Enclosure
- Use a well-ventilated container or terrarium with a secure lid to maintain humidity while allowing air exchange.
- Include plenty of hides, such as cork bark, bark slabs, or pieces of rotting wood.
Substrate
A nutrient-rich, natural substrate works best. Mix:
- Organic topsoil
- Decayed leaf litter (oak, beech, or birch)
- Rotting wood pieces
- A sprinkling of crushed eggshell, cuttlebone or Oyster Grit for calcium
The substrate should be deep enough (around 5–8 cm) to retain moisture.
Moisture & Humidity
Maintain a moisture gradient: one side of the enclosure damp (best achieved using Sphagnum Moss), the other side drier.
Mist occasionally but avoid overwatering. P. werneri prefers moderate humidity, not a swampy environment.
Good airflow prevents mould and stagnant conditions.
Temperature & Lighting
Room temperatures between 20–25 °C (68–77 °F) are ideal.
These isopods don’t need additional heating or lighting — natural room light is sufficient.
Avoid direct sunlight or heat lamps, which can dry out the enclosure quickly.
Diet & Nutrition
Porcellio werneri, like other isopods are decomposers, feeding primarily on decaying plant matter and wood. A varied diet helps maintain a balanced colony.
Staple Foods
Dried leaf litter (oak, beech, maple, birch)
Moss for texture and moisture
Supplementary Foods
A small amount of fish flakes or spirulina once or twice a week
Calcium sources like cuttlebone or crushed oyster shell to support exoskeleton health
Make sure any natural materials (leaves, wood) are pesticide-free and collected from clean areas.
Breeding & Colony Management
When provided with the right conditions, Porcellio werneri will breed successfully in captivity.
Keep environmental conditions stable — avoid frequent disturbance.
Provide consistent access to leaf litter and calcium.
Juveniles often appear once the colony feels secure and food is abundant.
Because P. werneri is a relatively slow-growing species, patience is key. Colonies may take several months to reach a sustainable population.
Common Problems and Prevention
| Issue | Likely Cause | Solution |
|---|---|---|
| Mould or soggy substrate | Overwatering / poor airflow | Improve ventilation, reduce misting |
| Slow growth / no breeding | Low food variety, stress, or temperature fluctuation | Increase organic material and protein; stabilize environment |
| High mortality | Pesticides, contamination, or dehydration | Always use clean natural materials; maintain a moisture gradient |
Recommended Supplies
- Isopod substrate
- Leaf litter (oak, beech, birch mix)
- Cork bark hides
- Moss (sphagnum or various live mosses)
- Cuttlebone / calcium powder
- Spray bottle for misting
- Ventilated plastic or glass terrarium
Final Thoughts
Porcellio werneri are captivating isopods that offer a glimpse into the delicate balance of a bioactive ecosystem. With a thoughtful setup — balancing moisture, airflow, and food diversity — these isopods can thrive and breed steadily in your collection.
Whether you’re expanding your isopod variety or creating a naturalistic vivarium, P. werneri is a rewarding species for any serious hobbyist.