Gyrolithes vidali nov. icnocsp. (Plioceno marino) en el sector Suroccidental de la cuenca del Guadalquivir (área de Palos de la Frontera, Huelva, España).
DOI:
https://doi.org/10.3989/egeol.86422-3749Keywords:
Ichnology, Lower Pliocene, Guadalquivir Basin.Abstract
A new ichnospecies Gyrolithes vidali, is defined for the marine Lower Pliocene at the South-western Sector of the Guadalquivir Basin. The size, helial and vertical desviation angle, internal structure and external wall ornamentation as well as a lower basal camera ending whole the system, are indicatives for their distinction. A pattern of burrowing behavior is proposed. This is made by means of a longitudinal and vertical helical movement. A paleoenvironmental significance is showed. The ichnocoenosis assemblage as settled within a protective offshore environment under a continuous, slow sedimentation rate. The tracemaker of Gyrolithes vidali is discused and a callianasid or thalassinid shrimp origin in assumed.
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