Thylacares
extinct genus of crustaceans
Thylacares is a genus of thylacocephalan containing only the single species Thylacares brandonensis.
Found in Silurian period strata from the Brandon Bridge Formation in Waukesha, Wisconsin, U.S., the species is distinguishable from other thylacocephalans by its smaller raptorial appendages and compound eyes. The body is fully encased in a bivalve shell, with only the eyes protruding on stalks. The species' trunk is composed of about 22 segments. It was once considered the oldest known thylacocephalan, before older specimens were found in Ordovician rocks.
“Thylacares” enters the record as extinct genus of crustaceans. Crown Archives preserves that source wording while asking what Thylacares, extinct and genus can confirm, complicate or overturn.
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“Thylacares” is worth following because a concise public description often conceals a longer documentary argument. Here, Thylacares, extinct and genus provides the most credible route into that argument.
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 Aug 23, 2026. The linked authority identifier is Q18156740. None of the 0 selected statements returned an explicit reference.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. 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 “Thylacares” 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.