Penestomus stilleri
species of Arachnida
Penestomus stilleri is a species of spider in the family Penestomidae. It is endemic to the Western Cape province of South Africa.
Distribution
Penestomus stilleri is known from several localities in the Western Cape, including Paarl, the Cederberg Wilderness Area, and Saldanha Bay.
Habitat
The species inhabits the Fynbos biome. The type specimen was found in silk-lined tunnels under an exfoliated section of rock in a boulder.
Description
Only females of Penestomus stilleri are known to science.
The carapace is orange-yellow, lighter posteriorly with a smooth texture. The sternum is dusky pale yellow. The chelicerae are orange with five promarginal teeth and two retromarginal teeth.
The legs are brown basally, with legs I and II orange distally and posterior legs pale yellow distally.
Begin with the source’s own compact description: “Penestomus stilleri” is species of Arachnida. The dossier treats that line as a proposition to test through Penestomus, stilleri and species, not as a finished interpretation.
Why this record matters
The phrase “species of Arachnida” 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.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Dec 16, 2025. The linked authority identifier is Q27503791. None of the 0 selected statements returned an explicit reference.
Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. 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 “Penestomus stilleri” 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.