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