# Fernando Etayo

Fernando Etayo Serna is a Colombian paleontologist and geologist. His contributions on the paleontology in Colombia has been mainly on the descriptions of ammonites and Etayo has helped describing many fossiliferous geologic formations of Colombia. Etayo obtained his MSc. degree in geology and geophysics from the Universidad Nacional de Colombia in 1963, and his PhD in paleontology from the University of California, Berkeley in 1975.

## Biography

In 1962, Etayo Serna published his first work about the species Codakia orbicularis and Codakia orbiculata. He has defined many geologic formations of Colombia in the 1960s and 1970s.
Etayo, together with fellow paleontologist María Páramo, collaborated in describing the first dinosaur fossil found in Colombia, Padillasaurus from the Paja Formation, close to Villa de Leyva, Boyacá. His work has been focused on the descriptions of the various ammonites found in the same formation. He also co-authored the 2016 publication about Stenorhynchosaurus munozi, found in the same formation.
Etayo has published in Spanish and English. In 1975, the year Etayo received his PhD degree, he was awarded the Louderbach Memorial Award in Stratigraphy from the University of California, Berkeley.
The ungulate Etayoa bacatensis, found in the Late Paleocene to Early Eocene Bogotá Formation south of Bogotá, has been named in honour of Etayo.

## Formations described by Etayo

| Age | Formation | Type locality | Year |
| Early Maastrichtian | La Luna Formation | Machiques | 1986 |
| Late Campanian | La Luna Formation | Machiques | 1986 |
| Campanian | Olini Group | Piedras | 1969 |
| Santonian | Olini Group | Piedras | 1969 |
| Santonian | Conejo Formation | Toca | 1969 |
| Turonian | Conejo Formation | Toca | 1969 |
| Turonian | La Frontera Formation | Albán | 1969 |
| Turonian Cenomanian | Capacho Formation | Chiscas | 1985 |
| Turonian Cenomanian | Chipaque Formation | Chipaque | 1964 |
| Turonian Cenomanian | Simijaca Formation | Simijaca | 1969 |
| Cenomanian | Churuvita Formation | Sáchica-Samacá | 1968 |
| Early Cenomanian | Hiló Formation | Apulo-Anapoima | 1969 |
| Late Albian | Hiló Formation | Apulo-Anapoima | 1969 |
| Cenomanian | Chiquinquirá Sandstone | Chiquinquirá | 1968 |
| Mid Aptian | Chiquinquirá Sandstone | Chiquinquirá | 1968 |
| Early Coniacian | Güagüaquí Group | Güagüaquí River | 1979 |
| Mid Albian | Güagüaquí Group | Güagüaquí River | 1979 |
| Early-Mid Albian | Puerto Romero Formation | Puerto Boyacá | 1979 |
| Early Albian | Capotes Formation | Bituima-Guayabal | 1969 |
| Early Albian | La Naveta Formation | Bogotá River | 1969 |
| Early Albian Late Aptian | Tibú-Mercedes Formation | Pamplona | 1986 |
| Early Albian Late Aptian | Tablazo Formation | Sutamarchán | 1968 |
| Late Aptian | Socotá Formation | Apulo | 1969 |
| Early Aptian | Trincheras Formation | Apulo | 1969 |
| Late Aptian | Paja Formation | Villa de Leyva | 1968 |
| Late Hauterivian | Paja Formation | Villa de Leyva | 1968 |
| Early Hauterivian | Ritoque Formation | Villa de Leyva | 1968 |
| Valanginian | Rosablanca Formation | Mesa de Los Santos | 1968 |
| Early Valanginian | Cumbre Formation | Arcabuco-Moniquirá | 1969 |
| Berriasian | Arcabuco Formation | Arcabuco | 1985 |
| Tithonian | Arcabuco Formation | Arcabuco | 1985 |

## Works

This list is a selection.

### Books

* 1994 - Estudios geológicos del Valle Superior del Magdalena
* 1986 - Evaluación de los recursos minerales no combustibles de Colombia
* 1983 - Mapa de terrenos geológicos de Colombia
* 1979 - Zonation of the Cretaceous of central Colombia by ammonites

### Articles

* 2009 - Bioestratigrafía de la Plancha 210 Guateque
* 1985 - Paleontología estratigráfica del sistema Cretácico en la Sierra Nevada del Cocuy
* 1979 - La fauna de moluscos del Paleoceno de Colombia. I. Moluscos de una capa del Paleoceno de Manantial (Guajira)
* 1968 - El Sistema Cretáceo en la región de Villa de Leiva y zonas próximas
* 1964 - Posición de las faunas en los depósitos cretácicos colombianos y su valor en la subdivisión cronológica de los mismos
* 1962 - Comprobación biométrica de las especies Codakia orbicularis y Codakia orbiculata