Anadenobolus monilicornis
A strikingly patterned black-and-yellow cylindrical millipede introduced to the Mangrove Forest at an undocumented date; the population failed to persist and the species is now Extirpated, with no dedicated observation records in observation records.
A strikingly patterned black-and-yellow millipede introduced to the Mangrove Forest at an undocumented date; the population failed to persist and the species is now Extirpated. No dedicated observation records exist, and introduction date, source, and the specific cause of extirpation are unknown. The species is retained in the record as a failed-persistence reference within the miniBIOTA millipede history.
Anadenobolus monilicornis is a medium-sized cylindrical millipede native to the Caribbean and Central America, widely established in South Florida as an introduced species. Adults typically reach 20 to 35 millimeters in length. The body is black with yellow, orange, or cream-colored segmental bands (the specific color varies among individuals and populations), and the legs are characteristically red-orange. The combination of yellow banding on a black body gives the species its "bumblebee" common name.
In Florida, A. monilicornis is one of the most common introduced millipedes in tropical and subtropical gardens, parks, and natural areas south of the frost line. It is most abundant in moist tropical environments with organic soil and leaf litter; it is strongly associated with compost-rich garden soil, mulch, and the litter layer beneath vegetation. In South Florida, it is frequently found in Mangrove Forest margins and other humid tropical habitats.
Like all Spirobolida, A. monilicornis is a leaf-litter detritivore, processing decaying plant material, fungi, and organic debris in the soil layer. It is a shredder: by physically fragmenting leaf litter and other plant debris, it accelerates decomposition and makes organic material accessible to smaller decomposers. Unlike some millipede species, A. monilicornis does not cause significant damage to living plant material; it is a detritivore rather than a herbivore in the strict sense.
Like many millipedes, A. monilicornis produces defensive secretions from repugnatorial glands along the body when disturbed. The secretion composition varies by species and group; in Spirobolida it typically includes hydrogen cyanide precursors (cyanogenic compounds) or quinones, making the millipede distasteful or toxic to most predators.
Among miniBIOTA's millipede community, A. monilicornis is ecologically most similar to Rusty Millipede, another introduced cylindrical Spirobolida detritivore. The two species are distinguished by color: A. monilicornis has black body with yellow bands and red legs; T. corallinus is uniformly coral-red. Flat-backed Millipede is a different order (Polydesmida) with a flattened body profile.
Bumblebee Millipede's intended ecological role in miniBIOTA was as a leaf-litter detritivore and nutrient recycler in the Mangrove Forest. By fragmenting and processing fallen mangrove leaves and organic debris, it would have contributed to the detrital food web alongside Surinam Cockroach, Florida Woods Cockroach, Woodlouse, and Earthworm. The species did not persist in miniBIOTA, so no ecological role was realized.
No introduction record, source, or date is on file. The species is recorded as Extirpated, with the notation that it is "retained as failed-persistence comparison context." This indicates the species was present at some point (hence Extirpated rather than simply absent) but the introduction event predates or is not documented in observation records.
No dedicated observation records exist for Bumblebee Millipede in miniBIOTA. The species is listed in a species composition mention in the April 8, 2026 species inventory note, but no dated sighting, introduction event, or disappearance event is on file.
Introduction date and source unknown; no dedicated observation records in observation records. The species is retained as a failed-persistence comparison node; the Extirpated status confirms prior presence. No population count, reproduction event, or sighting date is documented. Pattern parallels Flat-backed Millipede, another introduced millipede that declined and was declared Extirpated.
Leaf-litter detritivore and litter shredder; fragments and processes decaying organic material, accelerating decomposition and making organic particles accessible to smaller decomposers. Would have shared the Mangrove Forest detrital resource base with Surinam Cockroach, Florida Woods Cockroach, Woodlouse, and Earthworm. No feeding behavior was documented in miniBIOTA before extirpation.
Tropical species requiring warm, humid conditions and moist litter; sensitive to desiccation and cold. In South Florida it is active year-round but may be suppressed during unusually dry or cool periods. No miniBIOTA-specific tolerance measurements on record; causes of extirpation are unknown.
No reproductive observations in miniBIOTA. The species was Extirpated before any reproduction was documented. Spirobolida hatch from eggs with few leg pairs and add segments and leg pairs through successive molts over several months to one year.
No ecological interactions documented in miniBIOTA; species Extirpated. Would have occupied the same detrital processing niche as Surinam Cockroach and Woodlouse in the Mangrove Forest litter layer.
Follow this species across the habitats where it currently appears in the miniBIOTA biosphere.
