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Titan Isopod (Hoffmannseggii)
Porcellio hoffmannseggii
The 'Titan of Spain' or Titan Isopod. Probably the most gigantic, stubby and imposing terrestrial isopod with a rigid body ever kept in captivity (exceeds 1.6-1.8 inches). It belongs to the elite Iberian group and is an absolute display monster. More massive and rounded than P. expansus, it boasts a lead black or armored gray color with white edges (White skirt morph) and titanic antennae, territorially dominating the dry Spanish barks and mortally hating humid and stale air.
Class:Malacostraca
Order:Isopoda
Family:Porcellionidae
Genus:Porcellio
Species:Porcellio hoffmannseggii
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Environment
Terrestrial
Humidity
30 - 50 %
Day temperature
20 - 26 °C
Night temperature
18 - 22 °C
UVB
None
Species description
Geographical Origin and Habitat: Arid rocky mountain systems, dry calcareous valleys and cavities under gigantic granite blocks or cork oaks endemic to southern Spain.
Taxonomy and Genetics: Family Porcellionidae. (The King of Iberian isopods). While the Expansus is huge but thin and flat (pancake), the Hoffmannseggii ('Hoff' in slang) is mastodontic in every dimension: length, width and dome thickness. Very slow reproduction with very long female gestations.
Behavior and Habits: Intimidating historical prey. In nature they have almost no terrestrial natural predators due to the impervious armor. They stand tall on their powerful legs and brandish their huge and thick antennae ('Whips') like whips to feel the ground and warn conspecifics. Adult males literally fight for bark crevices and to protect their harem of pregnant females.
Morphology: Stubby and heavy monsters (Over 1.8 inches / 4.5 cm of pure opaque gray or graphite black armor). The lateral edges (skirts) are not as wide as those of the expansus, but the total volume (Bulk) of the body is double. Uropods (twin appendages on the tail) shaped like very long hands in males, which they use as posterior tactile shields.
Care, breeding and tankmates
Terrarium Setup: GIANT BINS, ARID WITH 'HIGH FLOW' (Hyper-Ventilated Setup). The 'Titans' CANNOT BE KEPT IN CLOSED TERRARIUMS. The box must be immense to avoid territorial aggression between lethal males, and have a gigantic wire mesh that replaces 80% of the lid. Deep layer of sandy soil mixed with calcareous gravel, full of stacked cork oak blocks.
Lighting and Heating: ABSENCE OF DIRECT LIGHT. They need the Spanish 'Coolness': 72-77°F (22-25°C). Prolonged temperatures above 82°F (28°C), combined with humidity, lead to fatal collapse and metabolic arrest.
Humidity and Hydration: EXTREME TEMPERATE DESERT VENTILATION (30-50% MAX). CRITICAL: 80% ARID Terrarium. As with expansus, spraying water on this giant isopod is a death sentence (water stagnates between the plates asphyxiating the gills). Only water deeply the darkest corner of the soil under a distant moss and let it dry.
Feeding and Supplementation: Grinders of Calcium and Arid Herbs. They demand dozens of huge dried holm oak leaves intact (not powdered). VERY IMPORTANT: Strangely HIGH protein requirement for a dry isopod (Dried minnows or large Krill) AND whole mountains of cuttlefish bone in pieces to support the colossal exoskeletons that will have to molt.
Compatibility: Absolute and Aggressive Elite Keeping. Titan males are lethally aggressive and territorial with each other. If the box is small or there are few dry cork shelters, the males will fight brutally using their antennae and will devour each other's bellies chasing each other from the reproductive zone. Only for dedicated expert keepers.
Health and Common Diseases: Decay from stale air mold (Stagnant Air Death ). If you ventilate the box poorly, the very smell of urine and massive feces produced by 1.6 inch beasts will inhibit their receptors: the condensation on the lid will turn into lethal bacterial poisoned drops for their belly as soon as they fall on it.
Geographic Origin and Distribution
Arid rocky mountain systems, dry calcareous valleys and cavities under gigantic granite blocks or cork oaks endemic to southern Spain.
Origin
Selective breeding and cultivarsNorth AmericaEurope, Mediterranean, and West Asia
Terrestrial invertebrate profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 4 cm
- Lifestyle/Microhabitat
- No verified data available
- Activity cycle
- No verified data available
- Sociality
- No verified data available
- Reproduction
- No verified data available
- Venom level
- No verified data available
- Handling tolerance
- No verified data available
- Brumation
- No verified data available
- Molting
- No verified data available
The catalog's scalar value is 4 cm. The Isopod.com — Porcellio hoffmannseggii source reports a maximum adult measurement of 4 cm for this species, recorded as body length. The taxonomic record consulted is Porcellio hoffmannseggii. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
Related species
Recommendations grouped by close relatives, companion choices, and similar care.
