Spirobolellus immigrans
taxon, (Chamberlin, 1920) species of spirobolellidae
Spirobolellus immigrans is a species of millipede in the family Spirobolellidae. It is found in Australia, although it was first described in California, United States of America from a specimen from staghorn fern imported from Australia.
Description
According to its original description (under the name Strophobolus immigrans), Spirobolellus immigrans has an orange dorsal surface split by a narrow median black stripe. The sides of the body are black while the ventral surface is yellowish orange. The collum (first body segment) is black and in its median region has lighter areolations. The antennae are a dull fulvous colour while the legs are yellowish orange. Colouration of immatures is similar to that of adults.
An adult male specimen of this species was measured as 2 mm wide and nearly 20 mm long. An immature specimen was measured as 8.5 mm long.
Ecology
Little is known about the ecology of this species, apart from the type specimen being found on an unspecified species of staghorn fern.
Begin with the source’s own compact description: “Spirobolellus immigrans” is taxon, (Chamberlin, 1920) species of spirobolellidae. The dossier treats that line as a proposition to test through Spirobolellus, immigrans and taxon, not as a finished interpretation.
Why this record matters
The phrase “taxon, (Chamberlin, 1920) species of spirobolellidae” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jul 27, 2026. The linked authority identifier is Q113097327. None of the 0 selected statements returned an explicit reference.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Spirobolellus immigrans” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.