Sigmagraptidae

Sigmagraptidae includes 20 children:

• Acrograptus
• Acrograptus Tzaj 1969
• Brachiograptus
• Brachiograptus
• Etagraptus
• Etagraptus
• Goniograptus
• Goniograptus M'Coy 1876
• Kinnegraptus
• Kinnegraptus Skoglund 1961
• Laxograptus
• Laxograptus Cooper & Fortey 1982
• Perissograptus
• Perissograptus Williams & Stevens 1988
• Petrograptus
• Petrograptus
• Sigmagraptus
• Sigmagraptus Ruedemann 1905
• Trichograptus
• Trichograptus
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