INVESTIGADORES
ORTEGA Gladys Del Carmen
artículos
Título:
Lingulate brachiopods from the Lampazar Formation (late Cambrian) of the Cordillera Oriental of northwestern Argentina
Autor/es:
MERGL, M.; HERRERA, Z.A.; VILLAS, E.; ORTEGA, G.
Revista:
JOURNAL OF PALEONTOLOGY
Editorial:
PALEONTOLOGICAL SOC INC
Referencias:
Lugar: Lawrence; Año: 2015
ISSN:
0022-3360
Resumen:
The Angosto de Lampazar, a classic locality for the study of lower Paleozoic
successions in the Cordillera Oriental, NW Argentina, has yielded a late Cambrian
relatively diverse, lingulate brachiopod fauna. Sandy lenses with calcareous cement from
the uppermost levels of the Lampazar Formation have yielded abundant remains of
articulate and phosphatic brachiopods. Among the latter, the new species Eurytreta
harringtoni Mergl and Herrera, Lingulella? melonica Mergl and Herrera, Libecoviella
lenticularis Mergl and Herrera, and Schizambon cardonalis Mergl and Herrera, as well as
the new genus and species Saltaia lampazarensis Mergl and Herrera are formally
introduced. Trilobites and conodonts from the same horizons characterize the Cordylodus
proavus Zone, allowing a correlation with Stage 10 of the Furongian Series. Although the
information on lingulate brachiopods from the C. proavus Zone is scarce across the world,
2
the composition of the studied association displays a relationship with coeval and slightly
younger faunas of Utah and Kazakhstan. The Argentine brachiopods, the first described
from the late Cambrian Proto-Andean margin of Gondwana, are more closely related to
temperate Laurentian faunas than to those from the high latitude North African margin of
Gondwana.