| 11. | The median stripe of the opisthosoma is bright orange, narrowly bordered with white.
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| 12. | However, the folium marking on the opisthosoma is darker than that of females.
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| 13. | Opisthosoma has a light grey foliate median band runs the entire length of opisthosoma.
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| 14. | Opisthosoma has a light grey foliate median band runs the entire length of opisthosoma.
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| 15. | Opisthosoma has a dark spot on median band.
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| 16. | The rest of the opisthosoma is yellowish.
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| 17. | In modern forms, the whole of the opisthosoma is fused into a single unsegmented structure.
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| 18. | The front margin of the opisthosoma tucks into a corresponding fold at the back of the carapace.
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| 19. | The underside of the opisthosoma carries the genital openings and five pairs of flap-like gills.
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| 20. | The opisthosoma is clearly flattened in most species and shows a median broad and dark leaf marking.
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