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Orthaulax Dainellii

Stromboidea

• Strombidae
  • Orthaulax
    • Orthaulax dainellii Savazzi, 1989

Original Description of Orthaulax dainellii by Savazzi, 1989:

• "Shell medium-sized for the genus, very thick in posterior and columellar regions, thin elsewhere. Spire pointed in juvenile stage (apical angle 25-30°), becoming markedly coeloconoid from 5th-6th whorl (Pleural angle 140-160°). Varices sometimes present on first 3-4 whorls (...). Enveloping of previous whorls begins at 4th-5th whorl (...). Shoulder absent in juveniles, rounded in subadults and adults. Last whorl with large, transversally elongated, axially constricted dorsal knob, located at the shoulder (...). Abapertural knob little developed, indistinct (...). Parietal callus forming a thick, axially elongated knob in posterior region of aperture (...). Secondary covering of the spire apparently approaching or reaching the shell apex. Outer lip and anterior canal unknown."

Locus typicus: Torrente Zimor, North of Ponte della Reania, Udine Province, Italy

Stratum typicum: uppermost lower Eocene

Orthaulax dainellii Savazzi, 1989; lower Lutetian, middle Eocene; Albanello quarry, Nogarole Vicentino, Val Chiampo, Vicenza area, Vicenza Province, Veneto Region, Italy; Coll. Virgilio Liverani

1. 56,5 mm
2. 40,7 mm

Orthaulax dainellii Savazzi, 1989; lower Lutetian, middle Eocene; Albanello quarry, Nogarole Vicentino, Val Chiampo, Vicenza area, Vicenza Province, Veneto Region, Italy; 72,0 mm; Coll. Virgilio Liverani

Etymology: named after G. Dainelli, who studied the upper Eocene Faunas of NE Italy.

References:

• Savazzi, 1989