Sulcichnus helicoidalis
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publication ID |
https://doi.org/ 10.4202/app.2009.0115 |
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persistent identifier |
https://treatment.plazi.org/id/03D5DE47-FFFC-FF97-FCE8-90D8FF50FEA9 |
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treatment provided by |
Felipe |
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scientific name |
Sulcichnus helicoidalis |
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Sulcichnus helicoidalis ichnosp. nov.
Fig. 4D–H View Fig .
Etymology: After the Greek word meaning helicoid.
Type material: Holotype, MMPE /Ic002.001.001 (Velerín, Estepona) ( Fig. 4E View Fig ) . Paratypes, MMPE / Ic 002.002.001 (La Lobilla, Estepona) ( Fig. 4D View Fig ) , JMC−UB /I−0086 (Vila−robau, Alt Empordà) ( Fig. 4F View Fig ) .
Type locality: Velerín , Estepona Basin, E Andalusia, Spain .
Type horizon: Upper Zanclean (Pliocene) silts, Estepona Basin, Málaga ( SE Spain) ( Aguirre et al. 2005) .
Material.—Number of specimens: 1 from Rio Torsero, Liguria; 2 from Baix Llobregat; 1 from Padrón, Estepona; 2 from Velerín, Estepona ( Table 2).
Diagnosis.—Helicoidal groove running around the corallite.
Description.—The trace consists of a groove that begins close to the base of the corallite and ends at the edge of the calyx, following an helicoidal, clockwise, sometimes irregular, pattern around the skeleton. Between one and two complete turns are made and it may present one or two short branches. Usually, the deepest part of the groove corresponds with the nearest to the coral calyx, and it is never deeper than 2 mm.
Remarks.— S. helicoidalis has been found in three of the four coral morphologies: flabellate, trochoid, and conical to turbinate ( Table 3). It is also present on specimens of Trochocyathus from the Miocene of Turin ( Italy) (MHNUT).
Stratigraphic and geographic range.—Tortonian (Late Miocene) to early Piacenzian (Middle Pliocene); Mediterranean area.
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