Tucked into the cracks of a building wall, a spider barely 3 to 4 millimeters long waits in its web — patient, still, and apparently fearless. Scientists have now formally identified this tiny creature as a new species, and given it a name borrowed from rock-and-roll royalty.
Meet Pikelinia floydmuraria — a wall-dwelling predator capable of taking down prey six times its own size. The Pink Floyd connection is no accident, but the full story behind the name is only part of what makes this discovery worth paying attention to.
A new species named after a legendary band
Pikelinia floydmuraria was formally described by researchers from several South American institutions and published in the open-access journal Zoosystematics and Evolution. The team spans a collaborative network reaching from Colombia and beyond, united by a shared focus on the understudied Filistatidae family of crevice weaver spiders.
The name carries two layers of meaning. “Muraria” derives from the Latin word for “wall,” a direct reference to the spider’s preferred habitat — the cracks and surfaces of human-built structures. It also nods to Pink Floyd’s landmark 1979 album The Wall, making the name both scientifically precise and culturally deliberate. Two purposes, one word.
P. floydmuraria is only the second species of the Pikelinia genus ever recorded in Colombia — which suggests the group may be more widespread and diverse than current records reflect, and that much of it remains undocumented.
Tiny body, outsized hunting ability
At just 3 to 4 millimeters in length, P. floydmuraria is easy to overlook. Its hunting record is harder to dismiss. Researchers documented these spiders capturing ants up to six times their own body size, a feat roughly equivalent — proportionally — to a house cat overpowering a large bear.
Dietary studies of the new species and a related Pikelinia population in Armenia, Colombia, revealed a varied menu: primarily Hymenoptera — the insect order that includes ants — alongside Diptera such as flies and mosquitoes, and Coleoptera, the order encompassing beetles. Four prey categories, one small spider.
One behavioral pattern stands out. These spiders build their webs near artificial light sources. Many insects are phototactic — drawn toward light — so by positioning themselves in high-traffic zones, P. floydmuraria effectively sets a passive trap, improving its catch rate without any additional effort.
A natural ally against urban pests
The spider’s preference for building walls and human structures places it in a category scientists call synanthropic: organisms that thrive in proximity to people rather than despite them. P. floydmuraria hasn’t merely tolerated urban environments; it’s adapted to exploit them.
Among its most consistent prey are species humans tend to find unwelcome. Mosquitoes from the family Culicidae and houseflies from Muscidae both appear regularly in its diet — not simply nuisance insects, but vectors for disease and a persistent public health concern in cities worldwide. Researchers stop short of strong claims, but the dietary pattern is suggestive. A spider that lives in walls, requires nothing from humans, and quietly reduces mosquito numbers may prove to be a more useful neighbor than most people would expect.
A mysterious link to a Galápagos cousin
The study also revisited a much older discovery. Pikelinia fasciata, a related species first identified in 1902 from the Galápagos Islands, had never been fully characterized in terms of female internal anatomy. Researchers used this study to provide the first detailed description and illustrations of the species’ female genitalia — closing a gap that had remained open for more than a century.
What emerged from that analysis was unexpected. The male palpal structures of P. fasciata and the newly described P. floydmuraria are nearly identical, despite the two species being separated by the vast Pacific Ocean. Scientists aren’t yet certain what to make of this. The resemblance could point to shared ancestry — a common evolutionary lineage that spread across a wide geographic range at some point in the distant past — or it could reflect convergent evolution, where similar environmental pressures independently produced similar physical traits. Both explanations remain on the table.
What researchers hope to uncover next
The identification of P. floydmuraria is, in the researchers’ own framing, a beginning rather than an endpoint. Molecular and DNA-based studies are needed to trace the spider’s evolutionary origins, clarify its relationship to P. fasciata, and map how the Pikelinia genus has spread across such disparate geographies.
Practical work lies ahead too. Quantifying the spider’s actual impact on urban pest populations — beyond dietary observation — would help determine whether it could play a meaningful role in integrated pest management strategies. With only two Pikelinia species now recorded in Colombia, and the genus still poorly characterized across much of South America, the walls around us may be concealing more than we assume. Sometimes the most consequential discoveries are hiding in plain sight — tucked into the cracks just above the doorframe.