Stromboidea

• Struthiolariidae
  • Monalaria Marwick, 1924

Original Description of Monalaria by Marwick, 1924:

• "Shell somewhat small, ovate, umbilicus closed in the adult, conch-whorls at first spirally lirate, later with curved axial ribs, and finally keeled and tuberculate; outer lip reflexed, thickened, concave above, then produced in a sweeping curve into a broad rounded wing opposite the lower keel, columella straight, aperture produced into a short widely-open canal."

Type species of Monalaria is Struthiolaria tuberculata concinna Suter, 1917.

Distribution: Endemic to New Zealand and restricted to the Eocene.

Monalaria species are

• Monalaria concinna (Suter, 1917)
• Monalaria filata Marwick, 1960
• Monalaria gracilis Finlay & Marwick, 1937
• Monalaria poliveta Stilwell, 2000

References:

• Marwick, 1924
• J.D. Stilwell (2002 b)

Internet:

• Plate from Marwick, 1924 showing M. concinna and M. minor (= Perissodonta minor)