Ptychocylis

Ptychocylis inclui 11 filhos:

• Ptychocylis acuta Brandt 1896
• Ptychocylis arctica Brandt 1896
• Ptychocylis basicurvata Meunier 1910
• Ptychocylis cylindrica Meunier 1910
• Ptychocylis drygalskii Brandt 1896
• Ptychocylis glacialis Meunier 1910
• Ptychocylis minor
• Ptychocylis obtusa Brandt 1906
• Ptychocylis ostenfeldi Kofoid & Campbell 1929
• Ptychocylis urnula (Claparède & Lachmann 1858)
• Ptychocylis wailesi Koifoid & Campbell 1929
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