The first animal ever described with the two-part scientific naming system used by modern zoology has just received a new physical reference specimen. The animal is Araneus angulatus, a large orb-weaving spider named by Swedish naturalist Carl Alexander Clerck in 1757. Its original three reference spiders vanished long ago, leaving one of taxonomy’s most historically important names anchored to drawings and words instead of an animal scientists could examine.
A team led by Smithsonian researchers has now designated a male spider collected in Sweden as the species’ neotype: the official replacement for the missing originals. The choice was not ceremonial. The scientists compared the new specimen with Clerck’s remarkably detailed illustrations, studied its anatomy, and matched mitochondrial DNA from a co-collected male against a recently published genome. Their result, published November 10 in the journal Taxonomy, gives researchers a real spider to test while exposing evidence that the familiar name may have been covering several hidden species.
Why this spider sits at the beginning of zoological naming
Clerck’s 1757 book Svenska Spindlar assigned Latin genus-and-species names to Swedish spiders one year before Carl Linnaeus published the 10th edition of Systema Naturae, the formal starting point for most zoological nomenclature. Normally, an animal name published before 1758 would not count under the modern rules.
Clerck’s spiders are the exception. In 1948, the International Commission on Zoological Nomenclature ruled that his 1757 names would be treated as though they had been published on January 1, 1758. According to the new paper, this remains the only such exemption. That makes Araneus angulatus the first available animal name in modern zoological nomenclature, not merely a very old spider label.
The distinction matters because scientific names are supposed to point back to a type specimen. A type is not necessarily the most typical member of a species. It is the physical reference that fixes a name to a particular organism when descriptions, photographs, or later classifications disagree.
The original spiders disappeared
Clerck illustrated both male and female A. angulatus and apparently based the description on three specimens. Those spiders were seen in the collection of Stockholm’s Royal Swedish Academy of Sciences in 1858. By 1965, a researcher reported that they could no longer be found. Searches since then have not recovered them.
That loss left an awkward gap beneath a name that also supports larger groups in spider classification. Araneus is the type genus of the orb-weaver family Araneidae, and A. angulatus is the type species of Araneus. Uncertainty at the species level can therefore ripple upward through the names built around it.
The researchers collected fresh specimens near the presumed Swedish type locality. They examined body shape, markings, genital anatomy, and mitochondrial cytochrome oxidase I, or COI, DNA. The male labeled RV04 matched the historical concept closely enough to become the neotype. It is now cataloged as NHRS-TOBI000005697 in the Swedish Museum of Natural History. Six additional studied spiders were deposited at the Smithsonian’s National Museum of Natural History.
The replacement spider came with a second surprise
Choosing the neotype solved the immediate naming problem, but the DNA comparison raised a larger one. Specimens currently called Araneus angulatus do not all cluster neatly together. The paper reports deep genetic divisions among samples and suggests that the name may presently include multiple evolutionary lineages.
That does not mean the team has formally announced several new species. The authors say broader sampling and more evidence are needed. Geography, anatomy, and additional genetic data will have to show whether those lineages deserve separate names. For now, the result is a documented warning that a supposedly familiar spider may be a small species complex in disguise.
The neotype makes that future work possible. Researchers can now compare uncertain specimens with an actual, accessible reference rather than trying to reverse-engineer a 269-year-old description. Clerck’s drawings were unusually useful for their time, but even excellent art cannot provide DNA or every anatomical detail a later study may require.
A historical repair with modern tools
The achievement is less about discovering a new spider than repairing a broken link in the history of science. A Swedish naturalist drew and named an orb-weaver before zoology had agreed where its official clock should begin. His specimens survived for at least a century, disappeared, and left the first valid animal name without its original biological anchor.
Now a spider collected near that name’s birthplace has been measured, photographed, preserved, and assigned the job. The oldest formal animal name has a modern reference again—and that reference is already revealing that the story under the name may be more complicated than anyone realized.
Sources and image credit
Sources: the Smithsonian Institution’s November 10, 2026 announcement and the peer-reviewed study in Taxonomy.
Featured image: the newly designated Araneus angulatus male neotype and detailed palp views. Credit: Coddington et al., Taxonomy (2026), CC BY 4.0; photographs by Kuang-Ping Yu and Taina R. Litwak.
