American giant millipede
Narceus americanus
A satisfyingly large, completely harmless North American millipede, highly recommended for bio-active forest terrariums and beginner arthropod enthusiasts seeking a docile invertebrate pet.
Environnement
Terrestre
Humidité
70 - 80 %
Température ambiante
20 - 24 °C
Température diurne
25 °C
Température nocturne
21 °C
Profondeur du substrat
>= 12 cm
Description de l'espèce
Geographical Origin and Habitat: The American giant millipede (Narceus americanus) is native to the eastern and central regions of North America, ranging widely from southern Canada down to Florida and west to Texas. It inhabits the damp forest floors of deciduous and mixed temperate woodlands, living under rotting logs, stones, moss beds, and within deep, decaying leaf litter.
Taxonomy and Genetics: Belongs to the class Diplopoda, order Spirobolida, family Spirobolidae, and genus Narceus. It is one of the largest native millipede species in North America. Genetically, it belongs to a species complex with regional variations in size and striping, sometimes classified under synonyms or sibling species names.
Behavior and Habits: A peaceful, nocturnal detritivore. It spends daylight hours burrowed in the substrate or hidden beneath decaying wood to avoid desiccation. It is harmless and does not bite; when threatened, it rolls into a tight spiral to protect its soft ventral parts and may secrete a defensive fluid containing benzoquinones that can temporarily stain skin.
Morphology: Features a cylindrical, segmented body composed of 50-60 segments, with adult lengths ranging between 10 and 14 centimeters. Each body segment bears two pairs of short legs. Coloration is dark grey to brownish-black, highlighted by thin, attractive bands of pink, red, or orange outlining the edge of each segment.
Soins, reproduction et cohabitation
Terrarium Setup: A glass or plastic enclosure of at least 40x30x30 cm is suitable for 3-4 specimens. The substrate is the most critical element and must be at least 10-15 cm deep (equal to the millipede's length). The mix should consist of organic compost soil, decaying hardwood leaves (oak/beech), crumbled rotting wood, and sphagnum moss. Avoid pure coconut fiber.
Lighting and Heating: Prefers moderate temperate conditions, with temperatures kept between 20 and 24 °C. High temperatures above 27 °C can be fatal. No supplemental lighting or UVB is required, as they spend most of their time in darkness. Ambient room light is sufficient to establish a natural day-night cycle.
Humidity and Hydration: Substrate humidity must be kept high (70-80%) but never soggy. Mist the enclosure regularly with dechlorinated water. Keep one corner of the tank covered with damp sphagnum moss to provide a moisture gradient. Standing water dishes are unnecessary and pose a drowning risk; they absorb moisture from food and soil.
Feeding and Supplementation: The primary food source must be the decaying leaves and wood within the substrate. Supplement this diet with small pieces of fresh vegetables (squash, carrots, cucumber) and fruits (apple, banana), removing uneaten food before mold develops. Provide a source of calcium, such as powdered calcium carbonate or cuttlebone.
Compatibility: Completely peaceful. They can be kept in groups or cohabitated with other docile decomposers like isopods and springtails in a bioactive setup. Never house them with predatory insects, centipedes, or reptiles that might attack them or disturb them during delicate molting periods.
Health and Common Diseases: Desiccation due to dry substrate is the most common cause of death. Mites are commonly found on wild-caught specimens; most are harmless commensals, but high populations can cause stress. Avoid chemical exposure (pesticides on food/leaves). Do not dig up or handle millipedes when they are underground molting.
Origine et répartition géographiques
The American giant millipede (Narceus americanus) is native to the eastern and central regions of North America, ranging widely from southern Canada down to Florida and west to Texas. It inhabits the damp forest floors of deciduous and mixed temperate woodlands, living under rotting logs, stones, moss beds, and within deep, decaying leaf litter.
Origine
Amérique du Nord
Profil d'invertébré terrestre
- Régime alimentaire
- Detritivore
- Feeds on decaying deciduous leaves, decomposing wood, and rich organic soil. Supplemental foods like cucumber, squash, and calcium sources are appreciated in captivity.
- Taille adulte
- 14 cm
- Mode de vie/microhabitat
- Terrestrial
- A strictly terrestrial and semi-fossorial detritivore, it spends its life in the leaf litter and topsoil of forests. Deep, nutrient-rich substrate composed of decaying wood and leaves is vital for its diet and environmental enrichment.
- Cycle d'activité
- Nocturnal
- The American giant millipede exhibits primarily nocturnal and crepuscular behavior, avoiding the harsh midday sun to prevent desiccation. It slowly navigates the forest floor at night to forage on decaying organic matter.
- Sociabilité
- Gregarious
- A docile and communal species that enjoys spending time partially buried in damp leaf litter. They often curl into a tight spiral when frightened or disturbed to protect their vulnerable underbelly.
- Reproduction
- Oviparous
- Mating occurs on the surface, after which females lay solitary eggs deep within the substrate. Each egg is carefully coated in a mixture of soil and the female's excrement for protection.
- Venimeux
- No
- Tolérance aux manipulations
- Tolerant
- Generally very docile and slow-moving, it tolerates gentle handling well. When threatened, it will curl into a tight spiral to protect its softer underbelly and may secrete a mild, foul-tasting defensive liquid that can stain the skin.
- Brumation
- Non requise
- Undergoes a winter diapause/brumation in cooler environments, digging deep into the soil to escape freezing temperatures.
- Mue
- Periodic
- Molting takes place underground within a constructed molting chamber made of soil and bodily secretions. High humidity is crucial during this vulnerable phase, and the millipede should never be unearthed or disturbed until it emerges on its own.
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