A clock made of insect parts, useful for dating the deep past
En una cantera de caliza en Cantabria, el tiempo se ha detenido durante 105 millones de años dentro de un fragmento de ámbar que guarda, intacta, a una avispa que nunca antes había tenido nombre. El hallazgo de Cretevania orgonomecorum no es solo el registro de una especie perdida, sino una invitación a repensar la diversidad de la vida en el Cretácico y la capacidad de la Tierra para conservar sus propios archivos. En el yacimiento de El Soplao, la paciencia de los investigadores y la química silenciosa de la resina antigua han conspirado para devolver al presente un instante del pasado profundo.
- Una avispa de tamaño inusualmente grande, con antenas y venación alar perfectamente conservadas, emerge del ámbar cretácico como un enigma anatómico que ningún catálogo científico había contemplado antes.
- El hallazgo tensiona las clasificaciones existentes del género Cretevania, obligando a un equipo internacional de España, China, Reino Unido y otros países a reescribir los criterios diagnósticos con los que se identifica esta familia de avispas.
- El Soplao, con 1.500 inclusiones fósiles y 30 especies descritas, se consolida como uno de los depósitos de ámbar más importantes del mundo, atrayendo investigadores de múltiples continentes hacia una cantera cantábrica.
- Los científicos proponen que Cretevania funcione como 'fósil guía', una herramienta de datación que permitirá anclar cronológicamente futuros yacimientos del Cretácico con mayor precisión.
- El respaldo de instituciones como el IGME, la Universidad de Barcelona, el Museo de Historia Natural de Oxford y la Academia China de Ciencias señala que este descubrimiento trasciende lo local para convertirse en un hito de la paleontología global.
En una cantera de Cantabria, investigadores han extraído del ámbar una avispa de 105 millones de años tan bien preservada que sus antenas y la ramificación de sus alas permanecen visibles. La especie, bautizada Cretevania orgonomecorum, no había sido identificada jamás, y su descubrimiento amplía la comprensión de la vida insectil durante el Cretácico.
Lo que llamó la atención del equipo internacional fue, ante todo, el tamaño del ejemplar: se trata de uno de los más grandes conocidos de su género, con rasgos anatómicos que lo distinguen de parientes hallados en Myanmar y China. El ámbar fue datado en el Albiense medio, situando la muerte del insecto hace aproximadamente 105 millones de años.
Pero el trabajo fue más allá de catalogar una especie nueva. Los investigadores revisaron el género Cretevania en su conjunto, estableciendo criterios diagnósticos más precisos que facilitarán el reconocimiento de especímenes similares en futuras excavaciones. Esta labor convierte a Cretevania en un 'fósil guía': un marcador fiable para datar capas rocosas y depósitos de ámbar del Cretácico.
El Soplao, enclavado en lo que fue un entorno costero o de aguas salobres, ha entregado hasta hoy 1.500 inclusiones fósiles y 30 especies formalmente descritas. Cuando los insectos caían sobre la resina de aquellos árboles antiguos, quedaban sellados en un medio sin oxígeno ni bacterias que, con el tiempo, se convirtió en ámbar. Ese proceso de preservación ha hecho del yacimiento un destino mundial para la paleontología.
El estudio contó con el respaldo del Gobierno de Cantabria, el Ministerio de Ciencia e Innovación y la Generalitat Valenciana, e involucró al IGME, la Universidad de Barcelona, el Museo de Historia Natural de Oxford, la Universidad de Valencia y la Academia China de Ciencias. Para Enrique Peñalver, uno de los autores, el hallazgo subraya tanto la evolución de las avispas parasitarias como la extraordinaria riqueza paleontológica del ámbar español.
In a limestone quarry in Cantabria, Spain, researchers have pulled from ancient amber a wasp so perfectly preserved that its delicate antennae and the intricate branching of its wings remain visible after 105 million years. The specimen belongs to a species never before identified—Cretevania orgonomecorum—and its discovery is reshaping what scientists understand about insect life during the Cretaceous period.
The wasp was found at El Soplao, a site that has become one of the world's most significant repositories of fossilized insects trapped in amber. An international team of specialists, working across institutions in Spain, China, Britain, and elsewhere, examined the specimen and recognized it as something new. What struck them immediately was its size. This wasp is among the largest known examples of its genus, and it carries anatomical signatures—particular arrangements in its antennae, specific patterns in how its wings are veined—that distinguish it from related species found in Myanmar and China. The amber itself was dated to the middle Albian period, placing the insect's death at roughly 105 million years ago.
The researchers did more than simply catalog a new species. They revisited the entire genus Cretevania, refining how scientists classify and identify members of this wasp family. They established new diagnostic criteria—essentially a more precise checklist of features—that will help paleontologists recognize similar specimens in future digs. This methodological work matters because it transforms Cretevania into what researchers call a "guide fossil," a species so widely distributed and so varied across time that it can serve as a reliable marker for dating rock layers and amber deposits from the Cretaceous era.
El Soplao itself tells a story about preservation. The site sits in what was once a landscape where land and sea intermingled—a coastal or brackish environment where trees grew near water. When insects died and fell into resin oozing from these ancient trees, they were sealed in a medium that excluded oxygen and bacteria. Over millions of years, the resin hardened into amber, creating a time capsule. To date, the quarry has yielded 1,500 fossil inclusions and 30 formally described species. That density of discovery has made El Soplao a destination for paleontologists worldwide, a place where a single piece of amber might contain not just one organism but an entire snapshot of a lost ecosystem.
The work was supported by a consortium of funding bodies—the regional government of Cantabria, Spain's Ministry of Science and Innovation, and the Valencian regional government—and involved researchers from the Spanish Geological and Mining Institute, the University of Barcelona, Oxford's Natural History Museum, the University of Valencia, and the Chinese Academy of Sciences. Enrique Peñalver, a researcher at the Spanish institute and one of the study's authors, noted that the discovery expands understanding of how parasitic wasps evolved and underscores the extraordinary paleontological richness of Spanish amber deposits. For the Cantabrian government, the finding reinforces El Soplao's status as a global center for amber research—a place where the deep past continues to yield its secrets to those patient enough to look.
Notable Quotes
This group could serve as a guide fossil for dating Cretaceous deposits, given its wide distribution and diversity— Study authors
The discovery expands our knowledge of the evolution of parasitic wasps and confirms the extraordinary paleontological richness of Spanish amber— Enrique Peñalver, Spanish Geological and Mining Institute
The Hearth Conversation Another angle on the story
Why does finding one more wasp species matter? Isn't the fossil record already full of insects?
Because this wasp is a key. Once you understand its anatomy well enough, you can use it to date other rocks and amber deposits. It's like having a reliable clock.
A clock made of insect parts?
Exactly. If you find Cretevania in a layer of rock, you know roughly how old that layer is. The wasp lived across a wide area and changed over time, so it's useful for comparison.
The researchers also rewrote how to identify the whole genus. What does that actually change?
It gives future scientists a clearer map. Instead of guessing whether a specimen belongs to Cretevania or something else, they now have precise features to check—antenna structure, wing patterns. It makes the work faster and more reliable.
And El Soplao has 1,500 fossils already. Is this one wasp really significant?
It's significant because it's part of a pattern. Each new species tells you something about what the ecosystem looked like 105 million years ago. Thirty species from one site means that place was rich, diverse, alive. This wasp is one more thread in that picture.
What does it feel like, holding amber that old?
You're holding a moment. The wasp died, fell into resin, and nothing has touched it since. No decay, no disturbance. Just time, pressing down.