21. This is peculiar given that most other early shark fossils show evidence of claspers . 22. The pelvic fins are small with rounded margins; claspers are found on males. 23. The pelvic fins are low; adult males have rather short, thick claspers . 24. This shrimp feeds using its feather like claspers to filter particles from the water. 25. The pelvic fins are small, with elongate, relatively short claspers in males. 26. Adult males have blue coloring on top and at the tip of the claspers . 27. Adult males have very short and thick claspers . 28. The pelvic fins are roughly triangular; the males have short, thick claspers . 29. Habiro found 12 moves which relate claspers along which surgery gives the same result. 30. First somite and anal claspers are crimson colored.
