Acritarcos de la Formacion Oville, edad Cambrico medio-Tremadoc, Provincia de Leon, Espana

FOMBELLA, M.A. 1978. Acritarcos de la Formación Oville, edad Cámbrico Medio - Tremadoc, Provincia de León, España. — Palinología, núm. extraord. 1.

Description of the most abundant acritarchs from the Cambrian Oville Formation in five localities in the province of León, Spain. Three stratigraphic zones are established and dated:
(i) early Middle Cambrian;
(ii) late Upper Cambrian; and
(iii) latest Cambrian to ?earliest Tremadocian.

The following new genera and species are described and illustrated:
Abacum normale, Annulum difuminatum, Bresca xeitosa, Casiopea celeste, Celtiberium clarum, C. dedalinum, Cymatiosphaera luminosa, Miaplacidus heteromorphicus, Multiplicisphaeridium ancliforme, M. eodigitatum, M. eopiriferum, M. solitarium, Protosphaeridium petaliferum, P. rugulosum, Sirius anulosus.