Reinterpretation of Malvinoconularia cahuanotensis (Braniša and Vanek) from the Devonian Altiplano and Western Andean Cordillera, Bolivia, South America

摘要: Abstract. The holotype of Malvinoconulariacahuanotensis (Branisa and Vanek) (Devonian, Bolivia), the type species monospecific genus Malvinoconularia Babcock etal., is redescribed refigured. M.cahuanotensis exhibits several gross morphological features that together are uniquely shared with Reticulaconulariabaini (Babcock Feldmann). In both taxa, transverse ribs nodose, interspaces bear longitudinal ridges (bars or crests) collinear (line up) across ribs, centerline (midline) faces marked by a subdued ridge. Additionally, two may also be similar in anatomy external ornament corner sulcus. slightly undulose geometry M. cahuanotensis exhibited certain specimens Reticulaconularia; however, whether this feature primary taphonomic origin unclear at present. Together, these similarities suggest probably junior synonym Reticulaconularia. Resumen. REINTERPRETACIONDE MALVINOCONULARIA CAHUANOTENSIS (BRANISAY VANEK) DEL DEVONICODE BOLIVIA, AMERICA SUR. El holotipo de y (Devonico, la especie tipo del genero es reinterpretado refigurado. exhibe varios rasgos morfologicos que en conjunto son compartidos unicamente con En ambos taxones las costillas transversas nodosas, los interespacios poseen aristas longitudinales (barras o crestas) colineares transversas, caras presentan una pequena elevacion externa sobre su linea media. Ademas, estas especies parecen ser similares anatomia ornamentacion surco marginal. La geometria suavemente ondulada tambien exhibida por ciertos especimenes Reticulaconularia, aunque aun no claro si esta caracteristica primaria tafonomica origen. conjunto, similitudes sugieren un sinonimo Reticulaconularia.