INCITAP   20787
INSTITUTO DE CIENCIAS DE LA TIERRA Y AMBIENTALES DE LA PAMPA
Unidad Ejecutora - UE
artículos
Título:
Spongeliomorpha in nonmarine settings: an ichnotaxonomic approach.
Autor/es:
RICARDO NESTOR MELCHOR; RICHARD BROMLEY; EMILIO BEDATOU
Revista:
EARTH AND ENVIRONMENTAL SCIENCE TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH
Editorial:
ROYAL SOC EDINBURGH
Referencias:
Año: 2010 vol. 100 p. 429 - 436
ISSN:
1755-6910
Resumen:
The authors revise the occurrences of burrow networks with striated walls having
dominantly transverse to oblique striae, which have been assigned to the ichnogenera Spongeliomorpha
Saporta, 1887, and Steinichnus Bromley & Asgaard, 1979. The taxonomic status of the
ichnogenus Steinichnus Bromley & Asgaard, 1979 is examined and it is suggested that this
ichnogenus is a subjective junior synonym of Spongeliomorpha Saporta, 1887. Spongeliomorpha is
best reserved for an unlined network of burrows having distinct surface ridges or grooves of different
orientation and massive filling. The diagnosis of Spongeliomorpha is emended accordingly and the
proposed ichnospecies revised for consistency with the diagnostic features of the ichnogenus.
Spongeliomorpha milfordensis Metz, 1993a is considered a subjective junior synonym of Spongeliomorpha
carlsbergi (Bromley & Asgaard, 1979) after a visual comparison and statistical analysis of the
angle of striation with respect to the burrow midline in the type material. Nevertheless, the use of
statistical techniques is not advocated for distinction of ichnotaxa, but may support observations.
Spongeliomorpha carlsbergi is considered as an indicator of nonmarine settings and was probably
produced by burrowing insects. Proposed ichnospecies of Spongeliomorpha that fit the emended
diagnosis include S. sudolica (Zare˛czny, 1878); S. iberica Saporta, 1887; S. sicula DAlessandro &
Bromley, 1995; S. chevronensis Mun iz & Mayoral, 2001; and Spongeliomorpha isp. nov. aff. sicula
Lewy & Goldring, 2006.