Nivel X, Los Valles de Fuentiduenya (Segovia) (Miocene of Spain)

Also known as Nivel X, Los Valles de Fuentidueña (Segovia)

Where: Segovia, Spain (41.4° N, 0.3° W: paleocoordinates 41.6° N, 1.2° W)

• coordinate stated in text

When: Vallesian (11.6 - 8.7 Ma)

• Miocene, MN9-10. There are 5 levels with fossil remains, level X is the highest in the section (approximately 100m above level Y3).

Environment/lithology: alluvial fan

• A pond system with a little alluvial fan in which most of the bones have been found.
• 'Microconglomerado de gravas y arenas de cuarzo que rellena el micropaleorrelieve carstico anterior. Presenta cambios laterales a limos y arcillas verdes laminates y arcillas marron-negruzcas ricas en materia organica. Las zonas conglomeratidos estan cementadas por cabonatos hojosos muy porosos y blanquecinos, posiblemente edaficos. Aparecen algunos cantos blandos y huesos muy dispersos. Potencia variable de 10 a 40 centimetros. Excepto en 'X-fisura', donde la potenci es algo mayor.'P. 349.

Size classes: macrofossils, mesofossils

Collection methods: Excavations in 1978-79 recovered 200kgs of sediment for level X.

Primary reference: M. Hoyos, M. A. Garcia del Cura, and S. Ordonyez. 1981. Caracteristicas geologicas de yacimiento de los Valles de Fuentiduenya (Segovia). Estudios Geologicos 37:345-351 [A. Turner/H. O'Regan/H. O'Regan]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40766: authorized by Alan Turner, entered by Hannah O'Regan on 30.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Rutilus pachecoi1
2 vertebral fragments.
Osteichthyes
 Salientia -
Latonia cf. seyfriedi2 von Meyer 1843 frog
V1 and ilion.
Reptilia
 Squamata - Anguidae
Ophisaurus sp.2 Daudin 1803 glass lizard
1 maxilla fragment, 1 vertebra, 1 dermal scale.
 Squamata - Colubridae
Colubridae indet.2 Oppel 1811 colubrid snake
1 rib, 4 vertebral fragments.
Mammalia
 Rodentia - Cricetidae
Hispanomys sp.3 Mein and Freudenthal 1971 mouse
Upper teeth: 1 I1, 2 M2,. 1 lower M3.
Megacricetodon sp.3 Fahlbusch 1964 mouse
Megacricetodon grupo minor-debruijni. 1 upper M1, 1 lower M1.
 Rodentia - Sciuridae
Heteroxerus cf. huerzeleri3 squirrel
H. cf. hürzleri. Lower teeth: 1 P4, 2 M1-2, 1 M3. Upper teeth: 1 P4, 1 M1-2.
 Rodentia - Castoridae
Chalicomys jaegeri3 beaver
1 upper M1-2.
 Lagomorpha - Ochotonidae
Prolagus cf. crusafonti3 López Martinez 1977 pika
1 upper left M2.
 Lipotyphla - Erinaceidae
Erinaceidae indet.3 Fischer von Waldheim 1817 hedgehog
1 upper unicuspid.